JP4645507B2 - Portable electronic devices and in-vehicle electronic devices - Google Patents

Description

  The present invention relates to a portable electronic device and a vehicle-mounted electronic device that are useful for reducing a traffic accident between a vehicle and a pedestrian.

  In order to reduce vehicle-to-pedestrian traffic accidents, vehicles are equipped with several safe driving support functions. For example, there is a system called night vision, which is a system that detects a pedestrian at night and uses a display to tell the driver where the pedestrian is. In the system described above, when a sensor mounted on the automobile recognizes a pedestrian, information for driving the vehicle so as not to collide with the pedestrian is provided. In this case, if the pedestrian is not aware of the car, the driver of the car needs to perform extra operations such as changing lanes to avoid the pedestrian and slowing down near the pedestrian.

  In order to improve such a situation, various systems have been proposed in which a signal is sent from a vehicle to a pedestrian to inform the pedestrian of the approach of the vehicle and to prompt a dangerous walking position change.

  As an example, a pedestrian danger alarm system using a portable transceiver described in Patent Document 1 is known. This system has an ID code, can transmit and receive, and recognizes and processes the received content, and outputs the direction and danger warning of the other party, and has an ID code, can transmit and receive, and recognizes the received content. And a vehicle-mounted device that measures the position of the other party, detects the degree of danger, and outputs a danger alarm.

In the system, an ID code unique to each portable device is attached to a signal transmitted from a portable device for pedestrians, and the vehicle-mounted device receives the signal with the ID code, and Is provided with a determination device for determining a predetermined physical specification (distance and position). Specifically, the pedestrian portable transceiver (H) owned by the pedestrian (M) transmits electromagnetic waves at any time, and the in-vehicle device provided in the automobile (A) receives at any time. Alternatively, a system may be used in which electromagnetic waves are generated from the vehicle-mounted device as needed, and electromagnetic waves are generated from the pedestrian portable transceiver for a specific time when the pedestrian portable transceiver senses the signal. And it is comprised so that a warning may be issued according to the relative positional relationship of a motor vehicle and a pedestrian.
JP 7-306995 A JP 2002-123896 A

  In the case of the system disclosed in Patent Document 1, the load of the vehicle-mounted device increases because the vehicle-mounted device of the automobile detects the position of the pedestrian and measures the degree of danger. Also, even when a pedestrian is safely walking on a sidewalk or pedestrian crossing, danger will be notified and some people may feel annoyed. Furthermore, even when a pedestrian is walking on a dangerous road, there is a problem that an alarm is not issued until the automobile is sufficiently close to the pedestrian. However, if the danger distance that gives a warning is set longer, the number of detected pedestrians increases, and warnings about these many detected pedestrians are given to the driver, which makes it troublesome for the driver. is there.

  As another example, a configuration described in Patent Document 2 is known. In this configuration, the first weak radio wave receiving means captures weak radio waves from pedestrians and other vehicles, and the current position information of the host vehicle at that time is acquired by the position detection means. Then, the current position information of the host vehicle and the reference dangerous place information are compared by the position information comparison means. Here, if they match, the first warning means alerts the driver of the car. And it is comprised so that a warning may be issued according to the positional relationship of a pedestrian and a vehicle. The reference dangerous place information storage means stores in advance dangerous places that may collide with pedestrians and vehicles as reference dangerous place information. Specific examples of dangerous places include mountain roads, poorly visible intersections, places near schools, kindergartens and nurseries, parks, nursing homes, and so on.

However, the configuration of Patent Document 2 is also configured to issue an alarm according to the positional relationship between the pedestrian and the vehicle, and thus has substantially the same problem as the configuration of Patent Document 1.
Accordingly, an object of the present invention is to provide a portable electronic device capable of notifying a pedestrian of the danger in a situation where the risk of encountering a traffic accident is high and reducing the traffic accident of the pedestrian. And providing an in-vehicle electronic device.

The portable electronic device according to the present invention includes a separation zone for separating a sidewalk and a roadway from a safe area and a dangerous area for a pedestrian on a sidewalk, a type of a separation band, a structure of the separation band, and the separation band. A storage means for storing safety map data determined and configured to correspond to presence / absence, a position detection means for detecting a current position of a pedestrian carrying a portable electronic device, and a detected current position of the pedestrian When the determination means for determining whether it is located in the safe area or the dangerous area based on the safety map data, and the current position of the pedestrian is located in the dangerous area, It has a feature in that it is provided with a notification means for performing danger notification.

  According to the above configuration, the safety level of the detected current position is determined based on the safety map data, and the danger notification is performed when the determined safety level is lower than the set safety level. In a situation where the risk of encountering a traffic accident is high (when the safety level is low), the pedestrian can be notified of the danger, and traffic accidents of the pedestrian can be reduced.

Moreover, in the case of the said structure, it is preferable that the said isolation | separation zone is a fixed thing which distinguishes a sidewalk and a roadway, such as a guardrail, a curb, a white line, and a planting. Furthermore, when the separation zone is a curb, the safety map data is preferably determined in consideration of the height of the curb and the height of the roadway and the sidewalk. Furthermore, when the separation zone is a guardrail, it is more preferable that the safety map data is determined in consideration of the height and strength of the guardrail.

In addition, a receiving unit that receives a signal transmitted from a signal transmitting unit mounted on a vehicle is provided, the position detecting unit detects the position of the pedestrian when the signal is received, and the determining unit It is determined based on the safety map data whether the position of the pedestrian at the time of reception is located in the safe area or the dangerous area, and the position of the pedestrian at the time of signal reception is determined by the notification means. When the vehicle is located in the dangerous area, it is preferable to make a vehicle approach danger notification .

In the case of the said structure, it is preferable that the said position detection means is comprised so that position detection of cm accuracy is possible. Further, it is more preferable that the notification means is configured to change the notification mode between vehicle approach danger notification and normal danger notification .

Further, it is better that the notification means includes a sound output unit and is configured to change the volume of the sound when changing the notification mode. Furthermore, it is preferable that the notification means includes a display and is configured to change the color of display light or the intensity of light when changing the notification mode. Furthermore, the notification means includes a vibration output unit that physically operates the portable electronic device main body, and is configured to change the size of the physical operation of the portable electronic device main body when changing the notification mode. Good to be.

The in-vehicle electronic device according to the present invention is a portable electronic device carried by a pedestrian, a signal transmitting means for transmitting a signal to the portable electronic device having a function of receiving and transmitting a signal, and responding to the transmission signal Receiving means for receiving a signal sent from the portable electronic device and including information on the location of the portable electronic device, and a region where a pedestrian is safe against a traffic accident on the sidewalk And storage means for storing safety map data configured to determine the dangerous area corresponding to the type of separation band separating the sidewalk and the roadway, the structure of the separation band, and the presence or absence of the separation band, and the reception determination means for determining the location of said portable electronic device is positioned in the secure the hazardous area or located within the region on the basis of a signal and the safety map data, for the mobile by the determination unit Electronic machine If the location of is determined to be located in the hazardous area, having characterized in that comprising a notification means for performing notification to the driver.

In the above configuration, the signal transmitting means, if the location of O Ri said portable electronic device to said determining means is determined to be located in the hazardous area, the approach information of the vehicle to the portable electronic device Even more preferably, it is configured to transmit. Further, the signal transmission means is preferably configured to be able to change the transmission direction according to the moving direction of the vehicle.

  The first embodiment of the present invention will be described below with reference to FIGS. First, FIG. 1 is a block diagram showing an electrical configuration of the portable electronic device 1 of the present embodiment. The portable electronic device 1 is a relatively small device (for example, preferably about the size of a PDA or a mobile phone) and has no hindrance for a pedestrian to carry and walk.

  As shown in FIG. 1, the portable electronic device 1 includes a controller 2, a position detector (position detection means) 3, a storage section (storage means) 4, a communication section 5, an operation section 6, A display 7, a sound output unit 8, and a vibration output unit 9 are provided. The controller 2 has a function of controlling the overall operation of the portable electronic device 1 and also has a function as a determination unit.

  The position detector 3 is composed of, for example, an RTK-GPS device, and can measure (detect) the current position of the portable electronic device 1 (pedestrian) in centimeters. The storage unit 4 is composed of, for example, a hard disk or a DVD drive device, and stores the safety map data 10. The safety map data 10 is data in which the safety level of the roadway and the sidewalk is determined according to the structure of the separation zone between the sidewalk and the roadway, and the specific contents thereof will be described later.

  The communication unit 5 has a function of performing wireless communication with the outside, for example, the vehicle-mounted electronic device 11 (see FIG. 4) having a wireless communication function mounted on a vehicle. The communication unit 5 has functions as a reception unit and a transmission unit. The operation unit 6 includes various operation switches (not shown) and a touch panel (not shown) provided on the display screen of the display 7.

  The display 7 is composed of a liquid crystal display, for example, and can display characters, maps, and the like. The sound output unit 8 is composed of a speaker and a buzzer and has a function of outputting sound and alarm sound. The vibration output unit 9 is composed of a drive source (which may be substantially the same as that used in a mobile phone) that vibrates the main body of the portable electronic device 1. The display 7, the sound output unit 8, and the vibration output unit 9 constitute notification means.

  FIG. 4 is a block diagram showing an electrical configuration of the in-vehicle electronic device 11. As shown in FIG. 4, the in-vehicle electronic device 11 includes a control unit 12, a position detector 13, a map data input device (storage means) 14, a communication unit 15, an operation unit 16, a display 17, A microphone 18 and a speaker 19 are provided. In addition, the part except the communication part 15 of each structure of the vehicle-mounted electronic device 11 can be comprised with the car navigation apparatus of a known structure, and the communication part 15 can be comprised with a radio | wireless communication terminal. is there.

  The control unit 12 has a function of controlling the overall operation of the in-vehicle electronic device 11, and also has a function as a determination unit. The position detector 13 is composed of, for example, a GPS receiver or a gyro sensor, and has a function of detecting the current position of the vehicle. The map data input device 14 is composed of, for example, a hard disk or a DVD drive device, and stores map data for realizing a car navigation function. The map data includes almost the same data as the safety map data 10 stored in the portable electronic device 1.

  The communication unit 15 has a function of executing wireless communication with the portable electronic device 1 (see FIG. 1) possessed by a pedestrian. The communication unit 15 has functions as a reception unit and a signal transmission unit. The operation unit 16 includes various operation switches (not shown) and a touch panel (not shown) provided on the display screen of the display 17.

  The display 17 is composed of a liquid crystal display, for example, and can display characters, maps, and the like. The microphone 18 inputs a voice uttered by the user and converts it into a voice signal, and a voice recognition process is executed by this voice signal. The synthesized sound and sound are output from the speaker 19. In the case of the above configuration, the display 7 and the speaker 19 constitute a notification means.

  Now, the safety map data 10 will be described with reference to FIGS. The safety map data 10 is data that may be referred to as a pedestrian position safety degree map. This is map data that makes it easy to see how dangerous the position where a pedestrian is in terms of traffic safety, and is configured by setting a safety degree to a representative point of a mesh of about 10 cm, for example.

  Here, the safety level is a numerical value indicating the probability that a traffic accident will occur when a pedestrian is in that position. For example, when a driver who is driving silently misses a pedestrian crossing the roadway, the probability of colliding with the pedestrian is high.

  The premise is that in the case of a sidewalk with a structure that makes it easy for pedestrians to enter the roadway, for example, in the case of a sidewalk with only white lines on the road, or in a sidewalk with flying curbs, pedestrians can easily move to the roadway Since the vehicle can easily travel on the sidewalk, the location is a place where it is easy to meet danger (traffic accidents).

  On the other hand, if the sidewalk and the roadway are separated by a solid continuous fixed object such as a guardrail, the location of the sidewalk is dangerous (traffic accidents) because it is difficult for pedestrians to enter the roadway and for vehicles to enter the sidewalk. ) Makes it difficult to meet. However, when there is a gap (a gap long enough to allow only a pedestrian to pass through) on the guardrail, the place is a place where the pedestrian can easily meet danger because the pedestrian easily enters the roadway. And it is a place where the driver of the vehicle also needs attention.

  Based on this concept, a safety degree map corresponding to a structure that separates a roadway and a road is created. This safety degree map can be created relatively easily if a road image is taken and image processing is performed.

  FIG. 5 is a diagram showing an image of the safety degree map (safety map data 10), that is, a display image on the display 7 of the portable electronic device 1 or the display 17 of the vehicle-mounted electronic device 11 of the vehicle. In FIG. 5, a safe place such as a sidewalk is indicated by a hatched area 20, and a dangerous place is indicated by a hatched area 21. That is, FIG. 5 shows that the safety level is low (dangerous) in the vicinity of the pedestrian crossing and in the gap portion of the guard rail. In addition, when the displays 7 and 17 can perform color display, for example, it is preferable to display a safe part in green and a dangerous part in red.

  The length of the gap between the guardrail and the curb is an important factor when determining the safety level. If the length of the gap is long enough for a vehicle to pass, there is a high possibility that the vehicle will pass through the sidewalk, and the risk of the sidewalk is high. If the length of the gap is large enough for pedestrians to pass through, the risk on the sidewalk is small. However, since the risk of pedestrians jumping out increases on the roadway side, the risk of the roadway hardly depends on the length of a gap such as a guardrail.

  Note that the portable electronic device 1 is configured to output an alarm sound when a pedestrian carrying the portable electronic device 1 enters the hatched area (dangerous place) 21 in FIG. And when a pedestrian goes out to a roadway, the portable electronic device 1 always outputs an alarm sound. Accordingly, the portable electronic device 1 is configured to notify the pedestrian of the danger. In this case, as a method of notifying the pedestrian of the danger from the portable electronic device 1, it is possible to change the notification form (the size and type of the alarm sound) depending on whether the vehicle is nearby or not. desirable.

  Further, in this embodiment, when a signal for inquiring about the current position of the pedestrian (portable electronic device 1) is sent from the in-vehicle electronic device 11 of the vehicle to the portable electronic device 1, the pedestrian is shown in FIG. A response signal is transmitted from the portable electronic device 1 to the in-vehicle electronic device 11 when in the hatched area 21 and on the roadway.

  Furthermore, in this embodiment, when the place where the gap of the guard rail is determined by the vehicle-mounted electronic device 11 of the vehicle, the presence of the corresponding place on the windshield glass is displayed in a superimposed manner. As a result, the driver can be alerted. The superimposed display is preferably realized using, for example, a HUD or a transparent EL display.

  Next, FIG. 6 is an image diagram showing how the degree of danger of the sidewalk is determined according to the structure of the separation band that separates the sidewalk and the roadway. In FIG. 6, a safe sidewalk portion is indicated by a hatched area 22, and a dangerous place is indicated by a hatched area 23. In addition, when the display 7 can display in color, for example, it is preferable to display the safe part 22 in green and the dangerous part 23 in red.

  If guardrails or continuous curbs are laid as a separation zone between the sidewalk and the roadway, the safety of the sidewalk is high. On the other hand, when the curbstone is discretely arranged as a separation zone between the sidewalk and the roadway, or when the sidewalk and the roadway are separated by a white line, the safety level is low. In this embodiment, when a signal is transmitted from the vehicle-mounted electronic device 11 of the vehicle to the portable electronic device 1, a danger notification signal (response signal) is transmitted from the portable electronic device 1 held by a pedestrian in a low safety area. Is transmitted to the in-vehicle electronic device 11.

Here, a method for determining the safety level of the sidewalk will be described. First, the following is an example of a separation zone between a sidewalk and a roadway.
・ Guard rail (height of about 10cm)
・ Continuous curb (height of about 15cm), continuous planting (similar to continuous curb)
・ Discrete curb stones
-There is only a white line (height 0 cm), etc. And Table 1 below is an example that numerically represents the safety level of the sidewalk near the separation zone. In Table 1, numerical values are determined according to the possibility that the vehicle will get over the separation zone.

この場合、ガードレールのタイプ（高さや隙間の有無や隙間の長さ）や、縁石の配置（連続的か、離散的か、離散の間隔（大、中、小））や、連続縁石のタイプ（マウントアップ、フラット、セミフラット）や、離散縁石のタイプ（直方体、台形）や、塗装色（白、灰色、茶色）や、反射板（有無、タイプ）や、分離帯からの距離（近傍、５０ｃｍ内側、１ｍ内側）等の条件を考慮して、歩道周辺の安全度が決定されるように構成されている。即ち、歩道と車道の分離帯の構造に応じて車道と歩道の安全度が決定されている。

In this case, the type of guardrail (height, gap, gap length), curb placement (continuous, discrete, discrete intervals (large, medium, small)), continuous curb type ( Mount-up, flat, semi-flat, discrete curb type (cuboid, trapezoid), paint color (white, gray, brown), reflector (presence / absence, type), distance from separation zone (near, 50cm) The degree of safety around the sidewalk is determined in consideration of conditions such as inside, 1 m inside). That is, the safety degree of the roadway and the sidewalk is determined according to the structure of the separation zone between the sidewalk and the roadway.

  In addition, when the safety level around the boundary of the separation zone is changed according to the distance from the separation zone, the lower the safety level (the more the vehicle goes from the separation zone to the road), the more the portable electronic device 1 moves to the pedestrian. The degree of notification (the volume of the alarm sound, the vibration of the device main body) is increased (see FIGS. 7A and 7B). In this case, when the vehicle approaches (when the portable electronic device 1 receives a signal from the vehicle-mounted electronic device 11 of the vehicle), or when there is no vehicle (see the broken line Q in FIG. 7B). In comparison, the degree of notification (the volume of the alarm sound, the vibration of the device body (physical operation)) is increased (see the solid line P in FIG. 7B). The alarm sound is not limited to the sound of a buzzer or the like, and may be configured to use a sound that notifies danger.

  When an image of the safety level around the boundary of the separation band is displayed on the display 7 of the portable electronic device 1, the safety level is displayed in shades of color (gradation) on the display screen shown in FIG. It is preferable. For example, the danger (low safety level) is displayed in red, and the safety level is associated with the darker red color. In addition, a caution (medium safety level) is displayed in yellow. Further, it is preferable that the degree of safety is displayed in green and that the degree of safety becomes higher as the green becomes darker. In this case, the display light color or light intensity is changed in accordance with the degree of safety.

  Next, the operation of the portable electronic device 1 having the above-described configuration, particularly the operation of determining the safety level of the current position and performing notification according to the safety level will be described with reference to FIGS. 2 and 3 show the control contents of the portable electronic device 1.

  First, in step S10 of FIG. 2, the current position of the portable electronic device 1 (pedestrian) is detected (measured). Then, it progresses to step S20 and the safety degree of the detected present position is determined based on the safety map data 10. And it progresses to step S30 and the alerting | reporting process according to the determined safety | security degree is performed. This notification process is executed by a subroutine shown in the flowchart of FIG.

  In step S110 of FIG. 3, the safety level value of the current position determined in step S20 is set. Then, it progresses to step S120 and it is determined whether the value of the safety degree of the said present position set is more than the predetermined safety limit value. Here, if it is smaller than the safety limit value (less than the safety limit value), the process proceeds to “NO” in step S120, and then proceeds to step S130 to determine whether or not there is a vehicle approach signal.

  In step S130, if there is no vehicle approach signal, that is, if the vehicle is not approaching, the process proceeds to “NO”, and the process proceeds to step S140. In step S140, a notification operation according to the currently set safety value is executed. Thereafter, the subroutine is completed, the process returns to step S10 in FIG. 2, and the above-described processing is repeatedly executed.

  If there is a vehicle approach signal in step S130, that is, if the vehicle is approaching, the process proceeds to “YES”, and the process proceeds to step S150. In step S150, a notification operation is executed according to the currently set safety value when the vehicle is approaching. In this case, the notification is executed by changing (intensifying) the volume of the notification sound and the strength of the vibration of the device body as compared with the case where the vehicle is not approaching. Thereafter, the subroutine is completed, and the process returns to step S10 in FIG.

  On the other hand, if the value of the safety level at the current position is equal to or greater than the safety limit value in step S120, the process proceeds to “YES” and the danger level is not notified (step S160), and the safety level determined in the past is read (step S120). S170). Then, the process proceeds to step S180, and statistical processing (extrapolation) is performed. Specifically, the statistical processing of how the current safety level and the safety level of the past time point (one second ago) transit in time. To estimate the extrapolated value at the time of the future (1 second later).

  Then, it progresses to step S190 and it is judged whether the result of an extrapolation value is likely to reach the value below a safety degree limit value. Here, if it is likely to reach a value equal to or less than the safety limit value, the process proceeds to “YES” in step S190 to perform preliminary notification (step S200). In this case, for example, an alarm is issued with a small sound. Thereafter, the subroutine is completed, and the process returns to step S10 in FIG. In step S190, if the result of the extrapolated value exceeds the safety limit value, the process proceeds to “NO”, does nothing, completes the subroutine, and returns to step S10 in FIG.

  According to the present embodiment having such a configuration, the portable electronic device 1 possessed by the pedestrian determines the safety level of the current position of the pedestrian based on the safety map data, and the determined safety level is set. Because it is configured to notify the danger when it is lower than the safety level, it notifies the pedestrian of the danger in a situation where the risk of encountering a traffic accident is high (a safety situation is low). be able to. Therefore, traffic accidents of pedestrians can be reduced.

Moreover, in the said Example, since the portable electronic device 1 which the pedestrian who has a high safety | security degree possesses does not alert | report a warning, a pedestrian is not bothered every time the vehicle passes.
Furthermore, in the said Example, when the vehicle approached the pedestrian (portable electronic device 1), since it alert | reported in the alerting | reporting aspect different from when the vehicle is not approaching (refer FIG. 150 of FIG. 3), it comprised. Since the pedestrian can clearly recognize that the vehicle is approaching and knows the danger, the safety is further improved.

  8 and 9 show a second embodiment of the present invention. The same components (and steps) as those in the first embodiment are denoted by the same reference numerals. In the second embodiment, as shown in FIG. 8, in addition to the vehicle approach signal, information (vehicle position information) indicating the current position of the vehicle is transmitted from the vehicle-mounted electronic device 11 to the portable electronic device 1. Configured to send.

  As shown in FIG. 9, the control operation of the portable electronic device 1 is almost the same as that of the first embodiment (see FIG. 3), except that step S310 is executed after step S150. It is. In step S310, the portable electronic device 1 receives the vehicle position information transmitted from the in-vehicle electronic device 11 of the vehicle, and the portable electronic device 1 displays the vehicle position on the map based on the received vehicle position information. And the vehicle position is displayed on the display 7 together with the map. Thereby, the information which understands the direction of the vehicle and the distance to the vehicle is executed.

  The configurations of the second embodiment other than those described above are the same as the configurations of the first embodiment. Accordingly, in the second embodiment, substantially the same operational effects as in the first embodiment can be obtained. In particular, according to the second embodiment, the position of the approaching vehicle is displayed on the display 7 of the portable electronic device 1, so that the pedestrian can more reliably recognize the danger of the vehicle.

  In the second embodiment, the vehicle position is displayed on the display 7 of the portable electronic device 1. However, the present invention is not limited to this. For example, glasses, shoes, watches, Alternatively, a display function for understanding the front-rear and left-right directions may be provided on a small display or the like, and the vehicle position and the map may be displayed on these wearable devices. If comprised in this way, a vehicle position can be taught to a pedestrian in real time.

  In the configuration in which another function (for example, an audio function) is incorporated in the portable electronic device 1 of the second embodiment, the vehicle approach signal described above and When the portable electronic device 1 receives the vehicle position information, when the vehicle position display is set, the vehicle position and the map may be automatically displayed instead of the operation screen of the audio function. .

  An example of this configuration is shown in the flowchart of FIG. 10 (third embodiment of the present invention). In FIG. 10, step S320 is executed before step S110, and the portable electronic device 1 enters an operation mode in which the audio function is operating. The processing from step S110 to step S200 and step S310 is executed in the same manner as in the second embodiment in parallel with the operation of the audio function. Further, after step S310, step S330 is executed, and if there is a display setting, the vehicle position and the map are displayed instead of the operation screen of the audio function. The configuration of the third embodiment other than that described above is the same as the configuration of the second embodiment.

  FIG. 11 shows a fourth embodiment of the present invention. The same components (steps) as those in the second embodiment are denoted by the same reference numerals. In the fourth embodiment, as shown in FIG. 11, when a vehicle approach signal and vehicle position information are transmitted from the vehicle-mounted electronic device 11 to the portable electronic device 1, the portable electronic device 1 transmits the above information. While receiving, the information of the position of the pedestrian (current position of the portable electronic device 1) in a dangerous (less safe) place is transmitted to the in-vehicle electronic device 11.

  When the vehicle-mounted electronic device 11 receives information on the position of the pedestrian (position coordinates), the control unit 12 displays the position coordinates on a HUD, for example, a windshield display, so as to notify the driver. ing. Thereby, the driver can clearly recognize a pedestrian having a low safety level. The portable electronic device 1 is configured to map the vehicle position on the map based on the received vehicle position information and display the vehicle position together with the map on the display 7.

  The configuration of the fourth embodiment other than that described above is the same as that of the second embodiment. Therefore, in the fourth embodiment, substantially the same operational effects as in the second embodiment can be obtained. In particular, according to the fourth embodiment, since the driver of the vehicle can clearly recognize a pedestrian in a dangerous position (in a place with a low safety level), the safety of the pedestrian is further improved. It can be further improved.

  In addition, since the portable electronic device 1 of the pedestrian who is in a highly safe position does not execute the transmission process for transmitting the position information to the in-vehicle electronic device 11, many portable electronic devices 1 communicate with each other at the same time. The problem of communication interference that occurs does not occur.

  FIG. 12 shows a fifth embodiment of the present invention. The same components (steps) as those in the third embodiment are denoted by the same reference numerals. In the fifth embodiment, as shown in FIG. 12, in a configuration in which another function (for example, an audio function) is incorporated in the portable electronic device 1, the portable electronic device 1 is dangerous (low safety level). ) Information on the position of the pedestrian in the place (the current position of the portable electronic device 1) is transmitted to the in-vehicle electronic device 11 (see step S340 in FIG. 12). The configuration of the fifth embodiment other than that described above is the same as the configuration of the third embodiment.

  In the second, third, fourth, and fifth embodiments, when an approach signal or the like is periodically transmitted from the vehicle-mounted electronic device 11 of the vehicle to the portable electronic device 1 of the pedestrian, the transmission distance of the vehicle is It is preferable to configure to change according to the speed. For example, it is preferable to increase the transmission distance as the vehicle speed increases.

  13 and 14 show a sixth embodiment of the present invention. The same components as those in the first embodiment are denoted by the same reference numerals. In the sixth embodiment, the portable electronic device 1 has no safety degree determination map (safety map data 10), and the vehicle-mounted electronic device 11 of the vehicle has a safety degree determination map (safety map data 10). And

  Then, as shown in FIG. 14, the vehicle-mounted electronic device 11 of the vehicle changes the communication distance (electric field strength) according to the traveling speed of the vehicle and the angle with respect to the traveling direction, and sends the inquiry signal to the portable electronic device 1. Configured to send. The on-vehicle electronic device 11 normally transmits a radio wave having directivity forward while changing the angle periodically. In this way, if a radio wave having directivity is transmitted while periodically changing the angle, the probability that a radio wave exists spatially becomes low, so that interference hardly occurs.

  Next, operations of the in-vehicle electronic device 11 and the portable electronic device 1 will be described with reference to the flowchart of FIG. First, in step S410 of FIG. 13, the in-vehicle electronic device 11 measures the traveling speed of the vehicle. Subsequently, the process proceeds to step S420, and the electric field strength (communication distance) is set according to the traveling speed of the vehicle and the angle with respect to the traveling direction of the vehicle. And it progresses to step S430 and transmits a question signal to the portable electronic device 1 with the electric field strength (communication distance) set according to the said angle. In this case, the transmission direction can be changed according to the moving direction of the vehicle. It should be noted that if there is a place with poor visibility from the map information, the communication distance in that direction is set longer.

  Here, if the pedestrian's portable electronic device 1 is present in the direction in which the radio wave is transmitted, the portable electronic device 1 receives the interrogation signal, and in response to the interrogation signal, sends a response signal to the in-vehicle electronic device. It is comprised so that it may transmit to the apparatus 11 (step S440). The response signal includes information such as the ID of the portable electronic device 1, the position of the portable electronic device 1, the traveling direction, and the traveling speed. In addition, it is configured to transmit only the ID and position information of the portable electronic device 1 or the ID as a response signal, and calculate the traveling direction and traveling speed of the portable electronic device 1 on the vehicle-mounted electronic device 11 side. Also good.

  Then, it progresses to step S450 and the vehicle-mounted electronic device 11 of a vehicle performs the analysis process of the response signal while receiving the said response signal. In this case, the vehicle-mounted electronic device 11 reads the position information of the portable electronic device 1 (pedestrian) included in the response signal, and determines the safety degree of the position using the safety degree determination map. When the response signal does not include position information, the approximate position of the portable electronic device 1 is estimated based on the direction of the response radio wave (response signal) with respect to the transmission radio wave (question signal). Yes.

  And it progresses to step S460, and the vehicle-mounted electronic device 11 displays a pedestrian position on a HUD, for example, a windshield display, when the safety degree of the analyzed position of the pedestrian is low (notifies the driver), Call the driver's attention. If the safety level of the pedestrian position is sufficiently high and safe, the in-vehicle electronic device 11 does not notify the driver. For example, as shown in FIG. 14, when a pedestrian is at four positions 1, 2, 3, and 4, positions 1 and 4 are on the sidewalk (the hatched area in FIG. 14), and thus safe. , Not notified. On the other hand, since the positions 2 and 3 are on the roadway, they are dangerous and are notified.

  Furthermore, when the driver wants to notify a pedestrian in a safe position (or a dangerous position) that the vehicle is approaching, the driver transmits a directional radio wave in the direction of the pedestrian's location, and issues a notification activation command to the radio wave. In addition, the notification function of the portable electronic device 1 is activated. Then, the portable electronic device 1 can notify the approach of the vehicle. It should be noted that this function can be configured as an option. If comprised in this way, the pedestrian who wants to know the approach of a vehicle at any time can be relieved.

  When the portable electronic device 1 transmits a response signal in response to the interrogation signal from the in-vehicle electronic device 11, if the response signal transmission timing is immediate, the approximate direction of the portable electronic device 1 is Recognize. That is, when a radio wave is emitted in the traveling direction of the vehicle and a response is immediately returned from the portable electronic device 1, the vehicle-mounted electronic device 11 determines the position of the pedestrian before reading the data from the portable electronic device 1. Judged as dangerous.

  FIG. 15 shows a seventh embodiment of the present invention. The same components as those in the sixth embodiment are denoted by the same reference numerals. In the seventh embodiment, when the in-vehicle electronic device 11 of the vehicle detects a pedestrian (portable electronic device 1) entering a place with a low safety level, only the portable electronic device 1 of the pedestrian outputs an alarm. Is configured to do.

  Specifically, Steps S410 to S460 are the same as those in the sixth embodiment. In Step S470, the in-vehicle electronic device 11 of the vehicle is portable for a pedestrian in a place with a low safety level. An alarm excitation signal is transmitted so that only the electronic device 1 sounds an alarm. In this case, ID data for identifying the pedestrian (portable electronic device 1) may be included only in the alarm radio wave transmitted in the direction to the pedestrian in a place with a low degree of safety. Further, the ID data may be included in the alarm radio wave transmitted in all directions.

  Then, the process proceeds to step S480, and when the portable electronic device 1 corresponding to the ID data receives a radio wave containing the ID data, an alarm is output and a pedestrian carrying the portable electronic device 1 is notified. It is configured to notify that it is dangerous.

  The configuration of the seventh embodiment other than that described above is the same as that of the sixth embodiment. Therefore, in the seventh embodiment, substantially the same effect as that of the sixth embodiment can be obtained. In particular, according to the seventh embodiment, the portable electronic device 1 of a pedestrian in a dangerous position (a position with a low safety level) receives an alarm excitation signal transmitted from the vehicle-mounted electronic device 11 of the vehicle. By doing so, an alarm can be sounded to alert the pedestrian that the safety is low, so that the safety for the pedestrian can be further increased.

1 is a block diagram of a portable electronic device showing a first embodiment of the present invention. Flow chart showing control contents of portable electronic device (part 1) Flow chart showing control contents of portable electronic device (part 2) Block diagram of in-vehicle electronic equipment Diagram showing image of safety map data Diagram showing image of safety map data The figure which shows the operation which changes the volume of the alarm sound according to the position of the sidewalk, the roadway and the separation zone FIG. 1 equivalent view showing a second embodiment of the present invention. 3 equivalent figure FIG. 3 equivalent view showing a third embodiment of the present invention. FIG. 1 equivalent view showing a fourth embodiment of the present invention. 3 equivalent figure Flowchart showing the fifth embodiment of the present invention. The figure which shows the image which changes the communication distance (electric field strength) according to the traveling speed and the angle to the traveling direction FIG. 13 equivalent view showing the sixth embodiment of the present invention.

Explanation of symbols

  In the drawings, 1 is a portable electronic device, 2 is a controller (determination unit), 3 is a position detector (position detection unit), 4 is a storage unit (storage unit), 5 is a communication unit (reception unit), and 7 is Display, 8 is a sound output unit, 9 is a vibration output unit, 10 is safety map data, 11 is an in-vehicle electronic device, 12 is a control unit, 13 is a position detector, 14 is a map data input device, and 15 is a communication unit ( (Signal transmitting means, receiving means), 16 is an operation unit, 17 is a display, 18 is a microphone, and 19 is a speaker.

Claims (13)

On pedestrians, pedestrians decide on areas that are safe and dangerous for traffic accidents according to the type of separation zone separating the sidewalk and roadway, the structure of the separation zone, and the presence or absence of the separation zone. Storage means for storing the generated safety map data;
Position detecting means for detecting the current position of a pedestrian carrying the portable electronic device;
A determination means for determining whether the detected current position of the pedestrian is located in the safe area or the dangerous area based on the safety map data;
A portable electronic device comprising notification means for performing a danger notification when the current position of a pedestrian is located in the dangerous area.   The portable electronic device according to claim 1, wherein the separation band is a fixed object that distinguishes a sidewalk and a roadway such as a guardrail, a curb, a white line, and a planting. 3. The portable electronic device according to claim 2, wherein , when the separation band is a curb, the difference between the height of the curb and the height of the roadway and the sidewalk is taken into account when configuring the safety map data. machine. 3. The portable electronic device according to claim 2, wherein when the separation band is a guardrail, the safety map data is taken into account when considering the height and strength of the guardrail. A receiving means for receiving a signal sent from a signal transmitting means mounted on a vehicle;
The position detection means detects the position of the pedestrian when the signal is received,
Based on the safety map data, the determining means determines whether the position of the pedestrian at the time of signal reception is located in the safe area or the dangerous area,
2. The portable electronic device according to claim 1, wherein when the position of the pedestrian at the time of signal reception is located in the dangerous area, the notification means performs a vehicle approach danger notification.   The portable electronic device according to claim 5, wherein the position detection unit is configured to be able to detect a position with cm accuracy.   6. The portable electronic device according to claim 5, wherein the notification means is configured to change a notification mode between vehicle approach danger notification and normal danger notification. The portable electronic device according to claim 7, wherein the notification unit includes a sound output unit, and is configured to change a volume when changing a notification mode. The portable electronic device according to claim 7, wherein the notification unit includes a display and is configured to change a color of display light or a light intensity when changing a notification mode. The notification means includes a vibration output unit that physically operates the portable electronic device main body, and is configured to change the size of the physical operation of the portable electronic device main body when changing the notification mode. The portable electronic device according to claim 9. A signal transmitting means for transmitting a signal to a portable electronic device carried by a pedestrian and having a function of receiving and transmitting a signal;
A receiving means for receiving a signal transmitted from the portable electronic device in response to the transmission signal, the signal including information on a location of the portable electronic device;
On pedestrians, pedestrians decide on areas that are safe and dangerous for traffic accidents according to the type of separation zone separating the sidewalk and roadway, the structure of the separation zone, and the presence or absence of the separation zone. Storage means for storing the generated safety map data;
Determining means for determining whether the location of the portable electronic device is located in the safe area or the dangerous area based on the received signal and the safety map data;
A vehicle-mounted electronic device comprising: a notification unit that notifies a driver when the determination unit determines that the location of the portable electronic device is located in the dangerous area . It said signal transmitting means, if the location of O Ri said portable electronic device to said determining means is determined to be located in the hazardous area, transmits a signal containing approach information of the vehicle to the portable electronic device The vehicle-mounted electronic device according to claim 11, configured as described above.   The in-vehicle electronic device according to claim 11 or 12, wherein the signal transmission unit is configured to be able to change a transmission direction according to a moving direction of a vehicle.

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