JP2009031002A - Potation determiner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately determine the state of potation without touching a determining object person. <P>SOLUTION: Data on a received light amount showing the received light amount of light having passed through expired air of a driver are acquired from a light receiver, the light being in a specific wavelength band of a near-infrared wavelength band (100). Environment information is acquired from an environment sensor (102). A reference amount of received light corresponding to the acquired environment information is acquired from a reference received-light amount storage part (104). A received light amount shown by the acquired data is compared with the acquired reference amount to calculate an attenuation amount of the received light (106). In cases where the calculated attenuation amount is larger than a predetermined threshold (108), a message is displayed on a display device, showing that the driver is in the state of potation (110). Meanwhile, in cases where the calculated attenuation amount is less than the threshold (108), a message is displayed on the display device, showing that the driver is not in the state of potation (112). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drinking determination device, and more particularly, to a drinking determination device that determines a drinking state of a determination target person.

  Conventionally, a light source that emits near-infrared light, an imaging unit that is sensitive to near-infrared light, and an image processing unit that inputs and processes an image of a captured finger are provided, and security control is performed. There is known a finger authentication device that analyzes biological information of a finger acquired at the same time as imaging or a temporal change thereof and measures a biological state such as health and physical condition (Patent Document 1). In this finger authentication device, biometric authentication technology and health diagnosis technology are combined, and operability that is easy to use is realized.

In addition, a laser beam with an alcohol absorption wavelength is emitted from the laser diode toward the traveling vehicle, a laser beam with a reference wavelength is emitted from the laser diode with a time difference, and both laser beams are detected by a common photodiode, A vehicle alcohol detection device that detects an alcohol component in a vehicle based on alcohol concentration data obtained by subtracting light reception amount data of an alcohol absorption wavelength from light reception amount data of a reference wavelength is known (Patent Document 2). In this in-vehicle alcohol detection device, the alcohol component in the vehicle of the traveling vehicle is detected remotely while the vehicle is running.
JP2003-146107A JP 2000-230900 A

  However, the above Patent Document 1 does not describe a specific method for detecting the drinking level, and therefore has a problem that the drinking level cannot be determined. Moreover, in the technique of the said patent document 2, since the alcohol contained in the air of the whole vehicle interior is detected and the driver's and a passenger's drinking state cannot be distinguished, the driver's drinking state used as a judgment object is determined. There is a problem that it cannot be determined with high accuracy.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a drinking determination device that can accurately determine a drinking state without touching a determination target person.

  In order to achieve the above object, the drinking determination apparatus according to the first aspect of the present invention is a first irradiating means for irradiating light in a wavelength region including a predetermined wavelength region in which absorption characteristics of alcohol in the near infrared wavelength region appear, A second irradiating means for irradiating light in a wavelength range including the predetermined wavelength range to an optical path different from the light irradiated by the first irradiating means; and a sensitivity in the wavelength range including the predetermined wavelength range; A first light receiving means for receiving the light emitted by the first irradiation means, a second light receiving means for receiving light emitted by the second irradiation means, having sensitivity in a wavelength range including the predetermined wavelength range; The amount of light received by the first light-receiving means and received by the first light-receiving means after passing through the expiration of the determination target person, and irradiated by the second irradiation means, and the determination target Without passing through the exhalation of the person Based on the received light amount of the light received by the two light receiving means, it is configured to include a determination means for drinking level of the determination subject.

  According to the drinking determination apparatus according to the first invention, the light in the wavelength range including the predetermined wavelength range of the near-infrared light wavelength range irradiated by the first irradiation means passes through the expiration of the determination target person. The light in the wavelength range including the predetermined wavelength range of the near-infrared light wavelength range received by the first light receiving means and irradiated by the second irradiation means is received by the second light receiving means without passing through the expiration of the determination subject. Is done.

  Then, the determination unit determines the drinking state of the person to be determined based on the amount of light received by the first light receiving unit and the amount of light received by the second light receiving unit.

  In this way, light in a wavelength range in which absorption characteristics due to alcohol in the near-infrared light wavelength range appear is received through the exhalation of the person to be judged and received without passing through the exhalation. Therefore, the drinking level of the determination target person can be determined, so that the drinking level can be accurately determined without touching the determination target person.

  The drinking determination apparatus according to the second invention is an irradiating means for irradiating light of a plurality of different wavelength ranges including a predetermined wavelength range in which at least one wavelength range shows absorption characteristics by alcohol in the near infrared wavelength range, At least one wavelength region has sensitivity to a plurality of different wavelength regions including the predetermined wavelength region, receives light of the plurality of wavelength regions irradiated by the irradiation unit, and each of the plurality of wavelength regions A light receiving means for outputting the amount of received light, and reception of light in a wavelength range including the predetermined wavelength range that has been irradiated by the irradiation means and that has been received by the light receiving means after passing through the expiration of the determination subject The determination target person based on the amount of light received by the irradiation means and passing through the expiration of the determination target person and received by the light receiving means in a wavelength range other than the wavelength range. And a determination unit configured to drinking level is configured.

  According to the drinking determination apparatus according to the second aspect of the present invention, the irradiation means emits light in a plurality of different wavelength ranges including a predetermined wavelength range in which at least one wavelength range shows absorption characteristics of alcohol in the near-infrared wavelength range. Irradiated, light in a plurality of wavelength ranges passes through the expiration of the person to be judged and is received by the light receiving means.

  Then, the determination means determines the drinking state of the person to be determined based on the amount of light received in a wavelength region including a predetermined wavelength region and the amount of light received in a wavelength region other than the wavelength region.

  In this way, light in a wavelength range in which absorption characteristics due to alcohol in the near-infrared light wavelength range appear and pass through the expiration of the determination subject, and light in a different wavelength range passes through the expiration. Since the light receiving state is compared and the amount of light received is compared to determine the drinking level of the determination target person, the drinking level can be accurately determined without touching the determination target person.

  A drinking determination apparatus according to a third aspect of the present invention is an irradiating means for irradiating light in a wavelength region including a predetermined wavelength region in which absorption characteristics of alcohol in the near infrared wavelength region appear, and sensitivity to the wavelength region including the predetermined wavelength region. A light receiving means for receiving the light emitted by the irradiating means, a determination environment detecting means for detecting an environment in which a determination target person exists, and each of a plurality of predetermined environments by the irradiating means. Storage means for storing the amount of light received by the light receiving means after passing through the atmosphere that does not contain alcohol in the environment, and irradiated by the irradiation means, and the judgment subject's The amount of light received by the light receiving means after passing through exhalation and the reception of light corresponding to the environment stored in the storage means and detected by the determination environment detection means. Based on the amount, it is configured to include a determination means for drinking level of the determination subject.

  According to the drinking determination apparatus according to the third aspect of the invention, the light in the wavelength range including the predetermined wavelength range of the near-infrared light wavelength range irradiated by the irradiation unit passes through the expiration of the determination subject and is received by the light receiving unit. Received light. Further, the environment in which the determination target person exists is detected by the environment detection means.

  Based on the amount of light received by the light receiving means and the amount of light received through the atmosphere that does not contain alcohol stored corresponding to the detected environment by the determination means, The person's drinking status is determined.

  In this way, light in a wavelength region in which absorption characteristics due to alcohol in the near-infrared light wavelength region appear is received through the expiration of the determination subject, and the amount of received light does not include alcohol in the detected environment. Compared with the amount of light received when passing through the atmosphere, the drinking state of the determination target person is determined, so that the drinking state can be accurately determined without touching the determination target person.

  The determination subject according to the first invention is a driver of the vehicle, and the determination means can determine the drunk state of the driver within a predetermined time after the driver is seated in the driver's seat. Thereby, before the driver's expiration is filled in the vehicle, the driver's drinking state can be accurately determined.

  The drinking determination apparatus further includes a reflector arranged on the optical path of the light emitted by the irradiating means, and the light receiving means is the light emitted by the irradiating means and reflected by the reflector. Light can be received. As a result, the irradiated light passes through exhalation for a long time, and the change in the amount of received light increases, so that the amount of received light can be compared to determine the driver's drinking level more accurately.

  A drinking determination apparatus according to a fourth aspect of the present invention is an imaging means having sensitivity in a wavelength range including a predetermined wavelength range where absorption characteristics of alcohol in the near-infrared light wavelength range appear, and a determination target person imaged by the imaging means Feature quantity extraction means for extracting an image feature quantity of a determination target image representing a region including exhalation, the image feature quantity extracted by the feature quantity extraction means, and an image representing the atmosphere that does not contain alcohol or the alcohol And a determination means for determining a drinking state of the determination target person based on an image feature amount of a reference image which is an image different from the determination target image.

  According to the drinking determination device according to the fourth aspect of the present invention, the region containing the breath of the determination subject is obtained by the imaging means having sensitivity in the wavelength region including the predetermined wavelength region where the absorption characteristic by the alcohol in the near infrared wavelength region appears. The image is captured, and the feature amount extraction unit extracts the image feature amount of the captured determination target image.

  Then, the image feature amount extracted by the feature amount extraction unit by the determination unit, and the image feature amount of the reference image which is an image representing the atmosphere that does not contain alcohol or a light absorption characteristic due to alcohol is different from the determination target image Based on the above, the drinking state of the determination target person is determined.

  As described above, the image feature amount of the determination target image representing the region including the breath of the determination target person and the image feature amount of the reference image, which is an image in a wavelength region including the predetermined wavelength region of the near infrared light wavelength region. Therefore, the drinking level of the determination target person can be determined, so that the drinking level can be accurately determined without touching the determination target person.

  The image pickup means according to the fourth invention is sensitive to each of a plurality of different wavelength ranges including at least one wavelength range including a predetermined wavelength range, outputs each image of the plurality of wavelength ranges, The image feature amount of a determination target image in a wavelength range including a predetermined wavelength range among a plurality of wavelength ranges captured by the imaging unit is extracted, and a determination target image of the plurality of wavelength ranges captured by the imaging unit The image feature amount of the reference image in the wavelength region other than the wavelength region of the image is extracted, and the determination unit is configured to determine the determination target based on the image feature amount of the determination target image extracted by the feature amount extraction unit and the image feature amount of the reference image. A person's drinking state can be determined. Thereby, the image feature amount of the determination target image in the wavelength region including the predetermined wavelength region in the near infrared light wavelength region is compared with the image feature amount of the reference image in a different wavelength region, and the drinking state of the determination target person is determined. It can be determined with high accuracy.

  The determination means according to the fourth invention includes an area including the image feature amount of the determination target image extracted by the feature amount extraction means, and exhalation that does not include alcohol of the determination target person imaged in the past by the imaging means. Based on the image feature amount of the reference image to be expressed, the drinking state of the determination target person can be determined. Thereby, the image feature amount of the determination target image representing the region including the breath of the determination target person, and the image feature amount of the reference image representing the region including the exhalation of the determination target person that does not include the alcohol of the determination target person. And the drinking state of the determination target person can be accurately determined.

  A drinking determination apparatus according to a fourth aspect of the present invention includes a determination target image representing a region including the expiration of the determination target person and an area not including the expiration of the determination target person from the image representing the determination target person imaged by the imaging unit. The image processing apparatus further includes an image extracting unit that extracts a reference image to be expressed, and the feature amount extracting unit extracts the image feature amount of the determination target image extracted by the image extracting unit, and the image feature of the reference image extracted by the image extracting unit. The amount is extracted, and the determination unit can determine the drinking state of the determination target person based on the image feature amount of the determination target image extracted by the feature amount extraction unit and the image feature amount of the reference image. As a result, it is possible to accurately determine the drinking state of the determination target person by comparing the image feature amounts of each of the determination target image and the reference image extracted from the captured image representing the determination target person.

  The image feature amount may include at least one of luminance, contrast, edge strength, and edge strength dispersion.

  Moreover, said predetermined wavelength range can be made into the wavelength range containing at least 1 of 1200-1300nm, 1650-1750nm, and 2300-2400nm of a near-infrared-light wavelength range.

  As described above, according to the drinking determination device of the present invention, an effect that the drinking state can be accurately determined without touching the determination target person is obtained.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the present embodiment, a case where the present invention is applied to a drinking determination apparatus that determines a drinking state of a vehicle driver will be described as an example.

  As shown in FIG. 1, the drinking determination apparatus 10 according to the first embodiment irradiates light in a specific wavelength region of the near-infrared light wavelength region so as to pass through the expiration of the driver who is the determination target person. And a light receiving device 14 that is sensitive to light in a specific wavelength range, receives light emitted from the lighting device 12, and converts the light into an electrical signal corresponding to the intensity of the light.

  The illuminating device 12 is a driver who sits in a driver's seat with light in a wavelength range (for example, 1650 to 1750 nm) in which light absorption characteristics by ethanol as an alcohol appear as light in a specific wavelength range of the near-infrared light wavelength range. Irradiate toward the exhalation. The illuminating device 12 is controlled to irradiate near infrared light in accordance with the light receiving timing of the light receiving device 14.

  As shown in FIG. 2, the lighting device 12 and the light receiving device 14 are arranged so as to sandwich the driver's breath from the left and right, and the driver who is seated by the light in the specific wavelength range emitted from the lighting device 12 is seated. The light is received by the light receiving device 14.

  In addition, the drinking determination device 10 stores a determination program for realizing a drinking determination processing routine for determining the driver's drinking state based on the received light amount data indicating the intensity of the received light output from the light receiving device 14. The computer 16, the display device 18 for displaying the processing result of the computer 16, and the environmental sensor for detecting environmental information indicating the environment (for example, temperature and humidity) in the vehicle where the driver of the vehicle exists. 28.

  The computer 16 includes a CPU, a ROM that stores a determination program of a drinking determination processing routine that will be described later, a RAM that stores data, and a bus that connects these. The function block obtained by dividing the computer 16 for each function realizing means determined based on hardware and software will be described. As shown in FIG. 1, the received light amount input for inputting the received light amount data output from the light receiving device 14 is used. Unit 20, a reference light reception amount storage unit 22 that stores a reference light reception amount corresponding to each of a plurality of predetermined environments, a light reception amount indicated by input light reception amount data, and an environment sensor 28. An attenuation amount calculation unit 24 that calculates the attenuation amount of the received light based on the reference light reception amount corresponding to the environment information, and a drinking determination unit that determines the drinking state of the driver based on the calculated attenuation amount of light. 26.

  In the reference received light amount storage unit 22, the intensity of light received by the light receiving device 14 when the atmosphere between the illumination device 12 and the light receiving device 14 does not contain ethanol is stored in advance as a reference received light amount. Yes. In addition, since the reference light reception amount varies depending on humidity, temperature, and the like, the reference light reception amount corresponding to each of a plurality of pieces of environment information determined by the humidity, the temperature, and the like is stored in the reference light reception amount storage unit 22.

  The attenuation amount calculation unit 24 compares the received light amount received by the light receiving device 14 with the reference received light amount corresponding to the detected environment information stored in the reference received light amount storage unit 222, so that the lighting device 12 An attenuation amount indicating the light amount (light intensity) of light that has been attenuated and decreased between the irradiation and the reception of light by the light receiving device 14 is calculated.

  The drinking determination unit 26 compares the calculated attenuation amount with a predetermined threshold value (the threshold value may also be set to change according to environmental information such as temperature and humidity), It is determined whether or not the driver's exhalation contains a predetermined amount or more of ethanol, and if it contains a predetermined amount or more of ethanol, it is determined that the driver is in a drinking state. Is determined to be a non-drinking state.

  The display device 18 displays the determination result by the computer 16 on the output screen, and transmits the determination result to the driver who is the determination target.

  Here, the principle of determining the drinking level will be described. It has been found that there is a wavelength region in which absorption characteristics due to ethanol appear in the near-infrared light wavelength region. Therefore, when light in a wavelength range where the absorption characteristic by ethanol passes through the breath of a person who is drinking, the amount of light (light intensity) is greatly attenuated and lowered. By detecting this change in the amount of light, the drinking state can be determined in a non-contact manner.

  Next, the operation of the drinking determination apparatus 10 according to the first embodiment will be described.

  First, when the driver is seated in the driver's seat of the vehicle and the driver's breath is located between the lighting device 12 and the light receiving device 14, the specific wavelength in the near infrared wavelength range from the lighting device 12 is reached. When the light in the region is irradiated, passes through the driver's breath, and light in the specific wavelength region is received by the light receiving device 14, the computer 16 executes a drinking determination processing routine shown in FIG.

  First, in step 100, received light amount data indicating the received light amount of light in a specific wavelength region in the near-infrared light wavelength region is acquired from the light receiving device 14, and in step 102, the temperature and humidity in the vehicle are acquired from the environment sensor 28. In step 104, the reference light reception amount corresponding to the environmental information acquired in step 102 is acquired from the reference light reception amount storage unit 22.

  In step 106, the received light amount indicated by the received light amount data acquired in step 100 is compared with the reference received light amount acquired in step 104, and the attenuation amount of the received light is calculated. It is determined whether or not the amount of attenuation calculated in step 106 is greater than a predetermined threshold value. As for the threshold, statistically or experimentally, the amount of light received in the specific wavelength region of the near infrared light wavelength region in the drinking state and the specific wavelength region of the near infrared light wavelength region in the non-drinking state. A light attenuation amount may be obtained based on the amount of received light, and a threshold value may be set in advance based on the obtained attenuation amount.

  In the above step 108, when the calculated attenuation amount is larger than the threshold value, it is determined that the amount of received light has decreased and the received light amount has decreased because the driver's exhalation contains a predetermined amount or more of ethanol, In step 110, a message indicating that the driver is in a drinking state is displayed on the display device 18, and the drinking determination processing routine is terminated. On the other hand, if the calculated attenuation is less than the threshold value, The driver's exhalation does not contain more than a predetermined amount of ethanol, so it is determined that the amount of received light is not attenuated and the received light amount has not decreased. In step 112, a message indicating that the driver is not in a drinking state is displayed. The display is performed on the display device 18, and the drinking determination processing routine is terminated.

  As described above, according to the drinking determination device according to the first embodiment, light in a specific wavelength region in which absorption characteristics of ethanol in the near infrared light wavelength region appear is allowed to pass through the driver's breath. The received light amount is compared with the reference received light amount when passing through the atmosphere that does not contain ethanol in the detected environmental information, and the light attenuation amount is calculated, based on the calculated attenuation amount, Since the driver's drinking level is determined, the drinking level can be accurately determined without touching the driver.

  Next, a second embodiment will be described. In addition, about the part which becomes the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The second embodiment is different from the first embodiment in that the light irradiated by the irradiation device is reflected by a mirror and the reflected light is received by the light receiving device.

  In the drinking determination device 10 according to the second embodiment, as shown in FIG. 4, the lighting device 12 and the light receiving device 14 are arranged on one side of the driver, and a mirror 200 for reflecting light on the opposite side is provided. Deploy. The light in the specific wavelength range emitted from the illuminating device 12 is reflected by the mirror 200 after passing through the driver's breath, and the reflected light passes again through the driver's breath, and then the light receiving device 14. Is received by. In this way, the irradiated light in the specific wavelength region passes twice through the driver's breath and passes through the breath for a long time, so that the amount of light is greatly attenuated when ethanol is contained in the breath. It decreases, making it easier to detect changes in light intensity.

  Since other configurations and operations are the same as those in the first embodiment, description thereof will be omitted.

  Next, a third embodiment will be described. In addition, about the part which becomes the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the third embodiment, the first embodiment is that the drinking state is determined based on the amount of light received through the driver's breath and the amount of light received through the breath. It is different from the form.

  As shown in FIG. 5, the drinking determination apparatus 310 according to the third embodiment includes a lighting apparatus 12, a light receiving apparatus 14, and a driver whose target is a light in a specific wavelength range of the near-infrared light wavelength range. The illumination device 312 that irradiates light so that it does not pass through the person's breath and sensitivity to light in a specific wavelength range, and the light emitted by the illumination device 312 is received and converted into an electrical signal corresponding to the intensity of the light. A light receiving device 314.

  As shown in FIG. 6, the optical path of the light emitted from the illumination device 12 is different from the optical path of the light emitted from the illumination device 312 and is received from the illumination device 12 when the driver is seated in the driver's seat. The illuminating device 12 and the light receiving device 14 are arranged so that the light path of the light to the device 14 passes through the breath existing around the nose and mouth of the driver, while the light from the illuminating device 312 to the light receiving device 314 is arranged. The illumination device 312 and the light receiving device 314 are arranged so that the optical path of the vehicle passes, for example, above the driver's head without passing through the driver's breath. Accordingly, the received light intensity to be determined is measured from the received light amount data output from the light receiving device 14, and the received light intensity serving as a reference is measured from the received light amount data output from the light receiving device 314. It is preferable that the optical path length from the illumination device 12 to the light receiving device 14 and the optical path length from the illumination device 312 to the light receiving device 314 are arranged to be equal.

  Moreover, the illuminating device 312 irradiates the light of the wavelength range of 1650-1750 nm as light of the specific wavelength range of a near-infrared light wavelength range similarly to the illuminating device 12, for example. The illumination device 312 is controlled to irradiate near infrared light in accordance with the light reception timing of the light receiving device 314.

  In addition, the drinking determination device 310 realizes a drinking determination processing routine for determining the driver's drinking state based on the received light amount data representing the intensity of the received light output from each of the light receiving device 14 and the light receiving device 314. The computer 316 which stored the determination program for this, and the display apparatus 18 are provided.

  The computer 316 receives the received light amount input unit 320 that receives the received light amount data output from each of the light receiving device 14 and the light receiving device 314 and the received light amount indicated by each received received light amount data. An attenuation amount calculation unit 324 for calculating the attenuation amount of the light and a drinking determination unit 26 are provided.

  The attenuation amount calculation unit 324 compares the received light amount to be determined received by the light receiving device 14 with the received light amount as the reference received light amount received by the light receiving device 314, thereby receiving light after being irradiated by the illumination device 12. The amount of attenuation, which is the amount of light (intensity of light) that has been attenuated and decreased until it is received by the device 14, is calculated.

  Here, the principle of determining the drinking level will be described. When light in a wavelength range in which absorption characteristics due to ethanol appear passes through the breath of a person who is drinking, the amount of light (light intensity) is greatly attenuated and lowered. On the other hand, light that does not pass through exhalation passes through the atmosphere that does not contain ethanol, and thus the amount of light is not significantly attenuated. Therefore, the drinking level can be determined in a non-contact manner by comparing the amount of received light and detecting the change in the amount of received light that has passed through exhalation.

  Next, a drinking determination processing routine according to the third embodiment will be described with reference to FIG. Note that the same processes as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  First, in step 100, received light amount data indicating the received light amount of light in a specific wavelength region of the near infrared light wavelength region is acquired from the light receiving device 14, and in step 350, the near infrared light wavelength region is acquired from the light receiving device 314. The received light amount data indicating the received light amount serving as the reference of the light in the specific wavelength region is acquired. In step 352, the received light amount data indicated by the received light amount data acquired in step 100 and the received light amount data acquired in step 350 are obtained. Is compared with the reference received light amount indicated by, and the attenuation amount of the received light is calculated.

  In the next step 108, it is determined whether or not the attenuation amount calculated in step 352 is larger than a predetermined threshold value. If the calculated attenuation amount is larger than the threshold value, step 110 is performed. Then, a message indicating that the driver is in a drinking state is displayed on the display device 18 and the drinking determination processing routine is terminated. On the other hand, if the calculated attenuation is less than the threshold value, a step is performed. At 112, a message indicating that the driver is not in a drinking state is displayed on the display device 18, and the drinking determination processing routine is terminated.

  As described above, according to the drinking determination apparatus according to the third embodiment, light in a specific wavelength region in which absorption characteristics by ethanol in the near infrared light wavelength region appear is allowed to pass through the driver's breath. In addition to receiving light, light in a specific wavelength range is received without passing through the driver's breath, and the amount of light that has passed through the breath is calculated by comparing the amount of light received. Therefore, since the driver's drinking level is determined, the drinking level can be accurately determined without touching the driver.

  Next, a fourth embodiment will be described. In addition, about the part which becomes the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The fourth embodiment differs from the first embodiment in that light in a plurality of wavelength ranges is irradiated and the drinking state is determined based on the amount of light received in the plurality of wavelength ranges. .

  As shown in FIG. 8, the drinking determination apparatus 410 according to the fourth embodiment passes light in a specific wavelength region in the near-infrared light wavelength region and light in the visible light region through the driver's breath. The illumination device 412 that irradiates the light, and has sensitivity to each of the light in the specific wavelength region and the light in the visible light region, and simultaneously or sequentially the light in the specific wavelength region and the light in the visible light region that the illumination device 412 irradiates. The light receiving device 414 that receives the light and converts it into an electrical signal corresponding to the intensity of the light, and outputs received light amount data indicating the received light amount of light in a specific wavelength region and received light amount data indicating the received light amount of light in the visible light region. And.

  The illuminating device 412 irradiates light in a wavelength range of 1650 to 1750 nm as light in a specific wavelength range of the near-infrared light wavelength range and light in the visible light range toward the breath of the driver seated in the driver's seat. To do.

  The lighting device 412 and the light receiving device 414 are disposed so as to sandwich the driver's breath from the left and right, and each of the light in the specific wavelength range and the visible light range irradiated from the lighting device 412 is seated. Passes through the person's breath and is received by the light receiving device 414.

  The received light intensity to be determined is measured from the received light amount data relating to the light in the specific wavelength range output from the light receiving device 414, and the received light intensity serving as the reference from the received light amount data relating to the light in the visible light region output from the light receiving device 414 is obtained. Measured.

  The computer 416 of the drinking determination device 410 includes a received light amount input unit 420 for inputting received light amount data related to light in a specific wavelength range and received light amount data related to light in a visible light range output from the light receiving device 414, and the input specific Attenuation calculation that calculates the attenuation amount of the received light in the specific wavelength range based on the received light amount indicated by the received light amount data related to the light in the wavelength region and the received light amount indicated by the received light amount data related to the light in the visible light range. A unit 424 and a drinking determination unit 26 are provided.

  Here, the principle of determining the drinking level will be described. When light in a wavelength range in which absorption characteristics due to ethanol appear passes through the breath of a person who is drinking, the amount of light (light intensity) is greatly attenuated and lowered. On the other hand, even if light in a wavelength region in which the absorption characteristic due to ethanol does not appear passes through exhalation, the amount of light is not greatly attenuated. Therefore, by comparing the amount of light received in the specific wavelength range with the amount of light received in the visible range, and detecting the change in the amount of received light in the specific wavelength range that passed through the exhaled breath, non-contact drinking The state can be determined.

  Next, a drinking determination processing routine according to the fourth embodiment will be described with reference to FIG. Note that the same processes as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  First, in step 450, from the light receiving device 414, the received light amount data indicating the received light amount of the light in the specific wavelength region of the near infrared light wavelength region and the received light amount data indicating the received light amount of the light in the visible light region are obtained. In step 452, the received light amount indicated by the received light amount data relating to the light in the specific wavelength range acquired in step 450 is compared with the received light amount indicated by the received light amount data relating to the light in the visible light range, and the received specific wavelength region is received. The amount of light attenuation is calculated.

  In the next step 108, it is determined whether or not the attenuation amount calculated in step 452 is larger than a predetermined threshold value. If the calculated attenuation amount is larger than the threshold value, step 110 is performed. Then, a message indicating that the driver is in a drinking state is displayed on the display device 18 and the drinking determination processing routine is terminated. On the other hand, if the calculated attenuation is less than the threshold value, a step is performed. At 112, a message indicating that the driver is not in a drinking state is displayed on the display device 18, and the drinking determination processing routine is terminated.

  As described above, according to the drinking determination apparatus according to the fourth embodiment, light in a specific wavelength region in which absorption characteristics of ethanol in the near infrared light wavelength region appear is allowed to pass through the driver's breath. In addition to receiving light, the light in the visible light region different from the specific wavelength region is received through the exhalation, and the amount of light attenuation in the specific wavelength region is calculated by comparing these received light amounts. Since the driver's drinking level is determined based on the amount, the drinking level can be accurately determined without touching the driver.

  In the above embodiment, the case where the wavelength range of light different from the specific wavelength range is the visible range is described as an example. However, the present invention is not limited to this, and the light wavelength range is different from the specific wavelength range. If the wavelength range is different from the specific wavelength range, the near-infrared wavelength range may be used.

  Moreover, you may make it provide a mirror on the optical path of each light of a specific wavelength range and visible light range. In this case, the light receiving device may receive the light in the specific wavelength range and the visible light range reflected by the mirror.

  Next, a fifth embodiment will be described. In addition, about the part which becomes the structure similar to 1st Embodiment and 3rd Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The fifth embodiment is different from the third embodiment in that the driver determines the drinking level within a predetermined time after sitting on the driver's seat.

  As shown in FIG. 10, the drinking determination device 510 according to the fifth embodiment includes a lighting device 12, a light receiving device 14, a lighting device 312, a light receiving device 314, and a driver seated in the driver's seat. A drinking determination processing routine for determining the driver's drinking level based on the seating sensor 520 for detecting the amount of light received and the received light amount data representing the intensity of light received from each of the light receiving device 14 and the light receiving device 314. The computer 516 which stored the determination program for implement | achieving and the display apparatus 18 are provided.

  The seating sensor 520 is embedded in the driver's seat and detects that the driver is seated in the driver's seat. The computer 516 includes a received light amount input unit 320, an attenuation amount calculation unit 324, a time measurement unit 524 that measures an elapsed time after the driver is seated on the driver's seat based on the output of the seating sensor 520, and a time A drinking determination unit 526 that determines a drinking state within a predetermined time during the time measured by the measurement unit 524;

  The drinking determination unit 526 determines the drinking state within a predetermined time, and does not determine the drinking state when the measured time exceeds the predetermined time. The drinking level may be determined using a threshold value that is changed according to the elapsed time within a predetermined time. Accordingly, it is possible to determine the drinking level in consideration of the change in the amount of attenuation within a predetermined time.

  When a long time has passed since the driver sat in the driver's seat and the ethanol contained in the expiration was filled in the vehicle, the difference between the amount of light received by the light receiving device 14 and the amount of light received by the light receiving device 314 became small. Since the determination of the drinking level cannot be performed with high accuracy, the drinking level can be determined with high accuracy by determining the drinking level within a predetermined time.

  In addition, about the effect | action of the drinking determination apparatus 510, since it is the same as that of 3rd Embodiment except the part mentioned above, description is abbreviate | omitted.

  Next, a sixth embodiment will be described. In addition, about the part which becomes the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 11, the drinking determination apparatus 610 according to the sixth embodiment illuminates the face of the driver who is the determination target with light in a specific wavelength range of the near-infrared light wavelength range. 612, and an imaging device 614 that includes a light receiving device that is sensitive to light in a specific wavelength range irradiated by the illumination device 612, and that acquires an image of a subject including the driver's face as a captured image.

  The illuminating device 612 irradiates the driver's face with light in a wavelength range of 1650 to 1750 nm, for example, as light in a specific wavelength range of the near-infrared light wavelength range. The illumination device 612 is controlled so as to irradiate near infrared light in accordance with the shutter of the imaging device 614.

  The imaging device 614 includes a light receiving device (not shown) that is sensitive to light in a specific wavelength range of 1650 to 1750 nm, and outputs a captured image in a specific wavelength range in which light absorption characteristics due to ethanol appear. The imaging device 614 includes an A / D converter (not shown) that performs A / D conversion on the image signal generated by the light receiving device, and an image memory for temporarily storing the A / D converted image signal. (Not shown).

  In addition, the drinking determination device 610 includes a computer 616 that stores a determination program for realizing a drinking determination processing routine for determining the driver's drinking state based on the captured image output from the imaging device 614, and the display device 18. And.

  The computer 616 detects a face and a nose from an image input unit 620 that inputs a captured image that is a grayscale image output from the imaging device 614, and a captured image input by the image input unit 620. A feature that extracts a luminance value as an image feature amount from each of the reference region and the determination target region, and an area division extraction unit 622 that extracts the upper reference region and the lower determination target region by dividing the region into two vertically. An amount extraction unit 624 and a drinking determination unit 626 that determines a driver's drinking level based on the calculated image feature amount are provided.

  The region segmentation extraction unit 622 detects the region representing the face and the nose position from the captured image using a conventional image processing technique such as pattern matching, and passes through the nose position in the width direction of the face as shown in FIG. The face area is divided into two parts on the upper and lower sides, and the lower area of the face area is extracted as the determination target area that includes exhalation. The reference area that does not include exhalation is extracted as the reference area. The upper region is extracted.

  The drinking determination unit 626 compares the extracted image feature amount of the reference region and the image feature amount of the determination target region, and when the difference between these image feature amounts is large, the drinking feature determination unit 626 determines that the subject is drinking. When the difference in amount is small, it is determined that the person is not drinking.

  Here, the principle of determining the drinking level will be described. When a driver's face is photographed by an imaging device having sensitivity in a wavelength range where light absorption characteristics due to ethanol appear, the region below the nose is more sensitive to the driver's breath than the region above the nose. The effect of contained ethanol appears strongly. Due to the influence of light attenuation in exhaled breath, the brightness and contrast in the lower determination target region are lowered or the edge boundary is not clear as compared to the upper reference region representing the atmosphere not containing ethanol. By recognizing this phenomenon from a captured image, the drinking state can be detected.

  Next, the operation of the drinking determination device 610 according to the sixth embodiment will be described.

  First, when the imaging device 614 is directed to the driver's face and a captured image representing the driver's face is captured by the imaging device 614, a drunk determination processing routine shown in FIG.

  First, in step 650, a captured image in a specific wavelength region in the near infrared light wavelength region is acquired from the imaging device 614. In step 652, the nose position and the captured image in the specific wavelength region in the near infrared light wavelength region are acquired. Detect face area.

  In step 654, the face area is divided into two parts at the top and bottom with the nose position as a boundary, and the upper area is extracted as the reference area, and the lower area is extracted as the determination target area. The luminance value is extracted as the image feature amount from the reference region extracted in step 654, and the luminance value is extracted as the image feature amount from the determination target region.

  In step 658, it is determined whether or not the difference between the image feature amounts extracted in step 656 is greater than a predetermined threshold value. As for the threshold, statistically or experimentally, the difference between the luminance value of the upper region of the face region and the luminance value of the lower region of the captured image in the specific wavelength region of the near-infrared light wavelength region in the drinking state. And a threshold value may be set in advance based on the obtained difference.

  If the value obtained by subtracting the luminance value of the determination target region from the luminance value of the reference region is larger than the threshold value in step 658, the determination is made based on the light absorption characteristics of ethanol contained in the driver's breath. It is determined that the luminance value of the target area has decreased, and in step 110, a message indicating that the driver is in a drinking state is displayed on the display device 18, and the drinking determination processing routine is terminated. On the other hand, when the value obtained by subtracting the luminance value of the determination target region from the luminance value of the reference region is equal to or less than the threshold value in step 658, ethanol is not included in the driver's breath, Since the light absorption characteristic is not seen, it is determined that the luminance value of the determination target region has not decreased, and in step 112, a message indicating that the driver is not in a drinking state is displayed on the display device 18 to determine whether or not to drink. The processing routine ends.

  As described above, according to the drinking determination device according to the sixth embodiment, the region including the driver's breath in the captured image in the specific wavelength region in which the light absorption characteristic by the ethanol in the near infrared wavelength region appears. Compare the image feature quantity of the determination target area that represents the image and the image feature quantity of the reference area that does not represent exhalation to determine the driver's drinking level, so the drinking level can be accurately determined without touching the driver Can be determined.

  In the above-described embodiment, the elapsed time after the driver is seated in the driver's seat may be measured, and the drinking state may be determined within a predetermined time. As a result, the driver's drinking state is accurately determined before the driver's exhalation fills the vehicle and the difference between the image feature amount of the reference region and the image feature amount of the determination target region becomes small. be able to.

  Next, a seventh embodiment will be described. In addition, about the part which becomes the structure similar to 1st Embodiment and 6th Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The seventh embodiment is different from the sixth embodiment in that the drinking state is determined by comparing image feature amounts extracted from captured images in a plurality of different wavelength ranges.

  As shown in FIG. 14, the drinking determination apparatus 710 according to the seventh embodiment is to determine each of light in a specific wavelength range (for example, 1650 to 1750 nm) in the near-infrared light wavelength range and light in the visible light range. The illumination device 712 that irradiates the face of the driver who is the driver, the light receiving device that is sensitive to the light in the specific wavelength range that the illumination device 712 emits, and the visible light that the illumination device 712 emits. And an imaging device 714 that includes a light receiving device and acquires an image of a subject including a driver's face as a captured image.

  The imaging device 714 includes a light receiving device (not shown) having sensitivity to light in a specific wavelength range of 1650 to 1750 nm and a light receiving device (not shown) having sensitivity to light in a visible light range different from the specific wavelength range. Then, a captured image in a specific wavelength range and a captured image in the visible light range, which have different light absorption characteristics due to ethanol, are output. Note that the imaging device 714 may capture images in a plurality of wavelength ranges (specific wavelength range and visible light range) at once using a prism or a half mirror like a 3CCD camera, or by switching filters temporally. You may shoot. Different filters may be arranged for each pixel as in a single-plate color camera.

  In addition, regarding the wavelength range in which the two light receiving devices have sensitivity, if one wavelength range includes the near-infrared light wavelength range and the main wavelength range is different, a part of the wavelength range overlaps. Also good.

  In addition, the computer 716 of the drinking determination device 710 includes an image input unit 720 that inputs two captured images that are grayscale images output from the imaging device 714, and each of the two captured images input by the image input unit 720. Detecting the face and nose, dividing the face region into two parts up and down with the nose as the boundary, extracting the lower region as the determination target region from the captured image in the specific wavelength region, and from the captured image in the visible light region, A luminance value is extracted as an image feature amount from each of a target region extraction unit 722 that extracts a lower region as a reference region, and a determination target region of a captured image in a specific wavelength region and a reference region of a captured image in a visible light region. A feature amount extraction unit 724 and a drinking determination unit 626 are provided.

  The target region extraction unit 722 detects a region representing the face and the nose position from each of the two captured images, divides the face region into two vertically, with the nose position as a boundary, and extracts expiration from the captured image in the specific wavelength region. As a determination target region that includes the absorption characteristics due to ethanol, the lower region of the face region is extracted, and from the captured image in the visible light region, as a reference region that includes exhalation and does not exhibit the absorption properties due to ethanol The lower region of the face region is extracted.

  Here, the principle of determining the drinking level will be described. For example, consider acquiring a captured image in a wavelength region A in which light absorption characteristics due to ethanol are seen and a captured image in a wavelength region B in which light absorption properties due to ethanol are not observed. At this time, if the driver who is the subject is in a drinking state, the brightness of the captured image in the wavelength region A is smaller (appears darker) than in a case where the driver is not in the drinking state. Such a change does not appear between the drinking state and the non-drinking state in the luminance value of the captured image in the wavelength band B. Therefore, the difference between the luminance value of the captured image in the wavelength region B and the luminance value of the captured image in the wavelength region A is calculated, and if the calculated difference is large, the driver is in a drinking state. If the determined ratio is small, it is determined that the driver is not in a drinking state.

  Next, a drinking determination processing routine according to the seventh embodiment will be described with reference to FIG. In addition, about the process similar to 6th Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  First, in step 750, a captured image in a specific wavelength region in the near-infrared light wavelength region and a captured image in the visible light region are acquired from the imaging device 714. In step 752, a specific wavelength region in the near-infrared light wavelength region is acquired. The nose position and the face area are detected from each of the captured image and the captured image in the visible light range.

  Then, in step 754, the face area is divided into two in the vertical direction from the captured image in the specific wavelength region, and the lower region is extracted as the determination target region, and from the captured image in the visible light region. Then, the face area is divided into upper and lower parts with the nose position as a boundary, and the lower area is extracted as the reference area. In the next step 756, the luminance value is extracted as the image feature amount from the reference region of the captured image in the visible light range extracted in step 754, and the image feature amount is determined from the determination target region of the captured image in the specific wavelength region. As a result, a luminance value is extracted.

  In step 758, it is determined whether the difference between the image feature amounts extracted in step 756 is greater than a predetermined threshold value. As for the threshold, statistically or experimentally, the brightness value of the lower region of the face region of the captured image in the specific wavelength region of the near-infrared light wavelength region in the drinking state and the captured image of the visible light region. A difference from the luminance value of the lower area of the face area may be obtained, and a threshold value may be set in advance based on the obtained difference.

  If the value obtained by subtracting the luminance value of the determination target region of the captured image in the specific wavelength region from the luminance value of the reference region of the captured image in the visible light region is larger than the threshold value in step 758, the driver's breath It is determined that the luminance value of the determination target region has decreased due to the light absorption characteristic of ethanol contained in the display, and in step 110, a message indicating that the driver is in a drunk state is displayed on the display device 18, The drinking determination processing routine is terminated. On the other hand, when the value obtained by subtracting the luminance value of the determination target region of the captured image in the specific wavelength region from the luminance value of the reference region of the captured image in the visible light region in the above step 758 is equal to or less than the threshold value, driving is performed. It is determined that the luminance value of the determination target area has not decreased because ethanol is not included in the breath of the person and no light absorption characteristic due to ethanol is seen, and the driver is not in a drinking state in step 112 Is displayed on the display device 18, and the drinking determination processing routine is terminated.

  As described above, according to the drinking determination device according to the seventh embodiment, the region including the driver's breath in the captured image in the specific wavelength region where the light absorption characteristic by the ethanol in the near infrared wavelength region appears. In order to determine the drinking state of the driver by comparing the image feature amount of the determination target region representing the image feature amount of the reference region representing the region including the breath of the driver in the captured image in the visible light range, It is possible to accurately determine the drinking state without touching the person.

  In the above embodiment, the case where the image for extracting the reference region is a captured image in the visible light range has been described as an example. However, the present invention is not limited to this, and the reference region is extracted. As long as the wavelength range of the image is different from the specific wavelength range, the near-infrared wavelength range may be used.

  Next, an eighth embodiment will be described. In addition, about the part which becomes the structure similar to 1st Embodiment and 6th Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In the eighth embodiment, the drinking state is determined by comparing the image feature amount extracted from the captured image obtained by capturing the driver to be determined with the stored reference image feature amount. This is different from the sixth embodiment.

  As illustrated in FIG. 16, the computer 816 of the drinking determination apparatus 810 according to the eighth embodiment detects the face and nose from the image input unit 620 and the captured image input by the image input unit 620, and A target region extraction unit 822 that divides the face region into two parts vertically, and extracts a lower region as a determination target region, and a feature amount extraction unit 824 that extracts a luminance value as an image feature amount from the determination target region, A reference feature quantity storage unit 828 that stores in advance, as a reference feature quantity, an image feature quantity extracted from a reference image that represents a region containing exhalation that does not contain ethanol, a calculated image feature quantity, and a stored reference feature quantity And a drinking determination unit 826 for determining the drinking level of the driver.

  A face area of a captured image representing a driver's face that has not been drunk in the past imaged by the imaging device 614 is divided into upper and lower parts with the nose position as a boundary, and the luminance value extracted from the lower area is used as a reference feature amount. Is stored in the reference feature amount storage unit 828. In addition, image feature amounts of the lower area of the face area are extracted as learning data from a plurality of captured images representing the face of a non-drinking driver imaged in the past, and are obtained from the extracted plurality of learning data. The image feature amount may be stored as a reference feature amount.

  Next, the content of the drinking determination processing routine according to the eighth embodiment will be described with reference to FIG. In addition, about the process similar to 6th Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  First, in step 650, a captured image in a specific wavelength region in the near infrared light wavelength region is acquired from the imaging device 614. In step 652, the nose position and the captured image in the specific wavelength region in the near infrared light wavelength region are acquired. Detect face area.

  Then, in step 850, the face area is divided into two in the vertical direction with the nose position as a boundary, and the lower area is extracted as the determination target area. In the next step 852, the face determination area is extracted from the determination target area extracted in step 850. A luminance value is extracted as an image feature amount.

  In step 854, the reference feature value is acquired from the reference feature value storage unit 828. Next, in step 856, the difference between the reference feature value acquired in step 854 and the image feature value extracted in step 852 is obtained. Is greater than a predetermined threshold value. As for the threshold, statistically or experimentally, the luminance value of the lower region of the face region of the captured image in the specific wavelength region of the near-infrared light wavelength region in the non-drinking state and the specific wavelength region in the drinking state A difference from the brightness value of the lower area of the face area of the captured image is obtained, and a threshold value may be set in advance based on the obtained difference.

  If the value obtained by subtracting the luminance value of the determination target region from the luminance value that is the reference feature amount is larger than the threshold value in step 856, depending on the light absorption characteristics of ethanol contained in the driver's breath. Then, it is determined that the luminance value of the determination target region has decreased, and in step 110, a message indicating that the driver is in a drinking state is displayed on the display device 18, and the drinking determination processing routine is terminated. On the other hand, if the value obtained by subtracting the luminance value of the determination target region from the luminance value that is the reference feature amount is equal to or less than the threshold value in step 856, ethanol is not included in the driver's breath, Since the light absorption characteristic by ethanol is not seen, it is determined that the luminance value of the determination target region has not decreased, and in step 112, a message indicating that the driver is not in a drinking state is displayed on the display device 18, The drinking determination processing routine is terminated.

  As described above, according to the drinking determination apparatus according to the eighth embodiment, the region including the driver's breath in the captured image in the specific wavelength region in which the light absorption characteristic by the ethanol in the near infrared wavelength region appears. The image feature amount of the determination target region that represents the image is compared with the image feature amount of the reference region that represents the region containing exhalation in the captured image in the specific wavelength region that represents exhaled breath that does not contain ethanol, and Therefore, the drinking level can be accurately determined without touching the driver.

  In the above embodiment, the case has been described in which the reference feature amount storage unit stores one image feature amount of the reference region. However, the reference feature amount storage unit corresponds to each of a plurality of predetermined environments. A plurality of image feature amounts of the reference area may be stored. In this case, an environmental sensor for detecting the environment in which the driver is present is provided in the vehicle, and when determining the drinking level, the image feature amount in the reference region corresponding to the environmental information detected by the environmental sensor is used as a reference. You may make it determine a drinking state by comparing from the image feature-value of the determination object area | region acquired from the feature-value memory | storage part, and the acquired image feature quantity of the reference | standard area | region.

  In the fifth to eighth embodiments, the case where the luminance value in the region is used as the image feature amount has been described as an example. However, the present invention is not limited to this, and the contrast and edge strength are not limited thereto. , And edge strength dispersion may be used. Further, it may be a combination of at least two of luminance value, contrast, edge strength, and edge strength dispersion. In this case, the drinking level may be determined based on the difference in the combination of the image feature amounts.

  Moreover, although the case where the drinking state is determined based on the difference between the image feature amount of the reference region and the image feature amount of the determination target region has been described as an example, the image feature amount of the reference region and the image feature amount of the determination target region The drinking level may be determined on the basis of the relative value with respect to, for example, the drinking level may be determined based on the ratio of the image feature amount of the reference region and the image feature amount of the determination target region.

  In said 1st Embodiment-8th Embodiment, although the determination result was displayed on the display apparatus and the case where a determination result was transmitted to a driver was demonstrated to the driver | operator as an example, it is not limited to this. Instead, the determination result may be transmitted to the driver through voice. Further, control such as engine stop may be performed based on the determination result.

  Moreover, although the specific wavelength range demonstrated to the example the case where it was 1650-1750 nm of a near-infrared light wavelength range, it is not limited to this, 1200-1300 nm of a near-infrared-light wavelength range, 1650-1750 nm And a wavelength region including at least one of 2300 to 2400 nm.

It is a block diagram which shows the drinking determination apparatus which concerns on the 1st Embodiment of this invention. It is an image figure which shows the arrangement position of the illuminating device and light receiving device which concern on the 1st Embodiment of this invention. It is a flowchart which shows the content of the drinking determination processing routine in the drinking determination apparatus which concerns on the 1st Embodiment of this invention. It is an image figure which shows the arrangement position of the illuminating device which concerns on the 2nd Embodiment of this invention, a light-receiving device, and a mirror. It is a block diagram which shows the drinking determination apparatus which concerns on the 3rd Embodiment of this invention. It is an image figure which shows the arrangement position of the illuminating device and light receiving device which concern on the 3rd Embodiment of this invention. It is a flowchart which shows the content of the drinking determination processing routine in the drinking determination apparatus which concerns on the 3rd Embodiment of this invention. It is a block diagram which shows the drinking determination apparatus which concerns on the 4th Embodiment of this invention. It is a flowchart which shows the content of the drinking determination processing routine in the drinking determination apparatus which concerns on the 4th Embodiment of this invention. It is a block diagram which shows the drinking determination apparatus which concerns on the 5th Embodiment of this invention. It is a block diagram which shows the drinking determination apparatus which concerns on the 6th Embodiment of this invention. It is an image figure which shows a mode that the face area | region was divided into 2 up and down. It is a flowchart which shows the content of the drinking determination processing routine in the drinking determination apparatus which concerns on the 6th Embodiment of this invention. It is a block diagram which shows the drinking determination apparatus which concerns on the 7th Embodiment of this invention. It is a flowchart which shows the content of the drinking determination processing routine in the drinking determination apparatus which concerns on the 7th Embodiment of this invention. It is a block diagram which shows the drinking determination apparatus which concerns on the 8th Embodiment of this invention. It is a flowchart which shows the content of the drinking determination processing routine in the drinking determination apparatus which concerns on the 8th Embodiment of this invention.

Explanation of symbols

10, 310, 410, 510, 610, 710, 810 Drinking determination device 12, 312, 412, 612, 712 Illuminating device 14, 314, 414 Light receiving device 16, 316, 416, 516, 616, 716, 816 Computer 18 Display Device 20, 320, 420 Light reception amount input unit 22 Reference light reception amount storage unit 24, 324, 424 Attenuation amount calculation unit 26, 526, 626, 826 Drinking determination unit 28 Environmental sensor 200 Mirror 222 Reference light reception amount storage unit 520 Seating sensor 524 Time measurement unit 614, 714 Imaging device 620, 720 Image input unit 622 Region division extraction unit 624, 724, 824 Feature amount extraction unit 722, 822 Target region extraction unit 828 Reference feature amount storage unit

Claims (11)

A first irradiating means for irradiating light in a wavelength region including a predetermined wavelength region in which absorption characteristics due to alcohol in the near infrared light wavelength region appear;
Second irradiation means for irradiating light in a wavelength range including the predetermined wavelength range in an optical path different from light irradiated by the first irradiation means;
A first light receiving means having sensitivity in a wavelength range including the predetermined wavelength range and receiving light emitted by the first irradiation means;
A second light receiving unit having sensitivity in a wavelength range including the predetermined wavelength range, and receiving light emitted by the second irradiation unit;
The amount of light received by the first light-receiving means and received by the first light-receiving means after passing through the expiration of the determination target person, and irradiated by the second irradiation means, and the determination target Determination means for determining the drinking state of the determination target person based on the amount of light received by the second light receiving means without passing through the person's breath;
Drinking judgment device including Irradiation means for irradiating light in a plurality of different wavelength ranges including a predetermined wavelength range in which at least one wavelength range shows absorption characteristics by alcohol in the near-infrared light wavelength range,
At least one wavelength region has sensitivity to a plurality of different wavelength regions including the predetermined wavelength region, receives light of the plurality of wavelength regions irradiated by the irradiation unit, and each of the plurality of wavelength regions Light receiving means for outputting the amount of received light of
The amount of light received in the wavelength range including the predetermined wavelength range that has been irradiated by the irradiation unit and passed through the expiration of the determination subject and received by the light receiving unit, and irradiated by the irradiation unit, and Determination means for determining the drinking state of the determination target person based on the amount of light received in the wavelength range other than the wavelength range received through the expiration of the determination target person and received by the light receiving means,
Drinking judgment device including Irradiation means for irradiating light in a wavelength region including a predetermined wavelength region where absorption characteristics by alcohol in the near-infrared light wavelength region appear,
A light receiving means for receiving light irradiated by the irradiation means, having sensitivity in a wavelength range including the predetermined wavelength range;
Determination environment detection means for detecting an environment in which a determination target person exists;
Storage means for storing the amount of light received by the light-receiving means for each of a plurality of predetermined environments that is irradiated by the irradiation means and passes through the atmosphere that does not contain alcohol in the environment; ,
The amount of received light received by the light receiving means after passing through the expiration of the judgment subject and stored in the storage means and detected by the judgment environment detection means Determination means for determining the drinking state of the determination subject based on the amount of light received corresponding to the environment,
Drinking judgment device including The determination target person is a vehicle driver,
The drinking determination apparatus according to claim 1, wherein the determination unit determines a drinking state of the driver within a predetermined time after the driver is seated in the driver's seat. A reflector disposed on the optical path of the light irradiated by the irradiation means;
The drinking determination apparatus according to any one of claims 1 to 4, wherein the light receiving unit receives the light irradiated by the irradiation unit and reflected by the reflecting plate. Imaging means having sensitivity in a wavelength region including a predetermined wavelength region in which absorption characteristics due to alcohol in the near-infrared light wavelength region appear,
Feature amount extraction means for extracting an image feature amount of a determination target image representing a region including the expiration of the determination target person imaged by the imaging means;
The image feature amount extracted by the feature amount extraction means, and an image feature amount of a reference image that is an image representing the atmosphere that does not contain alcohol or a light absorption characteristic of the alcohol that is different from the determination target image. Based on the determination means for determining the drinking state of the determination target person,
Drinking judgment device including The imaging means has sensitivity to a plurality of different wavelength ranges including at least one wavelength range including the predetermined wavelength range, and outputs an image of each of the plurality of wavelength ranges,
The feature amount extraction unit extracts an image feature amount of the determination target image in a wavelength region including the predetermined wavelength region among the plurality of wavelength regions imaged by the imaging unit, and is imaged by the imaging unit. In addition, the image feature amount of the reference image in a wavelength region other than the wavelength region of the determination target image among the plurality of wavelength regions is extracted,
The determination unit determines a drinking state of the determination target person based on the image feature amount of the determination target image extracted by the feature amount extraction unit and the image feature amount of the reference image. Drinking judgment device.   The determination unit includes an area including the image feature amount of the determination target image extracted by the feature amount extraction unit, and exhalation that does not include alcohol of the determination target person captured in the past by the imaging unit. The drinking determination device according to claim 6, wherein the drinking state of the determination target person is determined based on the image feature amount of the reference image to be expressed. Extracting the determination target image representing an area including the exhalation of the determination target person and the reference image representing an area not including the exhalation of the determination object from an image representing the determination target person imaged by the imaging unit. Further comprising image extracting means for
The feature amount extraction unit extracts the image feature amount of the determination target image extracted by the image extraction unit, and extracts the image feature amount of the reference image extracted by the image extraction unit,
The determination unit determines a drinking state of the determination target person based on the image feature amount of the determination target image extracted by the feature amount extraction unit and the image feature amount of the reference image. Drinking judgment device.   The drinking determination apparatus according to claim 6, wherein the image feature amount includes at least one of luminance, contrast, edge strength, and edge strength dispersion.   The said predetermined wavelength range is any one of Claims 1-10 made into the wavelength range containing at least 1 of 1200-1300nm, 1650-1750nm, and 2300-2400nm of the said near-infrared light wavelength range. Drinking judgment device.

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