JP5142383B2 - Lighting system - Google Patents

Description

  The present invention relates to a lighting system, and in particular, in a lighting system that detects the state of a person existing in a lighting space and performs dimming control of a lighting device in the room based on the detection result, causes a malfunction. The present invention relates to a technique for excluding moving objects.

There has been proposed an illumination control device that discriminates the presence / absence of a person in a room, a staying position, and the like by an image sensor installed on a ceiling of a living room, and appropriately blinks and dimms each lighting device in the room.
As shown in FIG. 5, the detection of a person by an image sensor is generally performed by comparing two or more images taken at a certain time interval, that is, a portion that has changed, that is, a constant that can be regarded as moving. This is done by specifying a block of pixels. If the person stops after moving, the above procedure cannot be detected despite the presence of the person, so that the pixel block M that has moved before is determined to be a person even if the person moves still. This is avoided by introducing a simple judgment circuit.

  The above-described change determination in the image can be performed by detecting the change in luminance information for each grid divided by dotted lines as shown in FIG. That is, the presence of a person can be determined by changing the luminance information of the floor or wall on the screen to the luminance information of the person's head or clothes as the person moves.

  However, there may be a change in luminance due to movement other than the movement of the user in the image from the image sensor. For example, external light may enter from the window W and be reflected on the floor or wall to form a high-luminance region. In the case of this example, if such an image suddenly appears due to the movement of clouds, it may be erroneously recognized as a user.

  In addition to people who move within the field of view of the image sensor (within the image), for example, there are curtains and blinds that are swayed by the wind from the window. In spite of the absence of a person, a malfunction may occur in which the lighting apparatus is turned on, which may cause discomfort to the person. Unnecessary lighting leads to wasteful power consumption, and should be avoided as much as possible.

  There has been proposed an illumination control device having a sensor capable of measuring indoor electromagnetic radiation, preferably visible light and infrared light, and a control unit for controlling indoor lighting in accordance with the measured electromagnetic radiation (Patent Document 1). . Here, a video sensor such as a CCD (charge coupled device) sensor capable of forming an electrical image of a room is used as the sensor.

In the above-mentioned patent document, it is described that the control means can control the illumination according to the following characteristic value or has the following means.
-Visible light emission value at a predetermined part of the image-Color temperature value of the image-Contrast between the radiation values of the image-Motion detection means-Object recognition means-Remote control device In the above device that can respond to the emitted signal, the position of the window that can be seen in the camera image is specified in advance, and when light is observed near that position, it is excluded from the normal processing system and the lighting fixture malfunctions. Is to prevent. In addition, a threshold level of light intensity (reference value) is set, and the control of the lighting fixture is changed depending on whether or not the threshold level is exceeded. For example, if the luminous intensity exceeds the threshold level, it is excluded from the processing system. It is configured to prevent malfunction.

  However, in the above apparatus, even if the position of the window and the light appearing in the vicinity thereof can be specified, the generated light can be determined only by setting up / down with respect to a specific threshold level. When the light is incident on the floor and reflected on the floor or wall to form a high brightness area, or when the curtain / blind shakes and appears in the camera image below the threshold level, it is determined that the person is a person and The problem of mislighting was undeniable. Specifically, originally, the lighting fixture L should be turned on only when a person (luminance block M) is present in the room, but by turning on the switch of the TV placed near the wall, A change in luminance may occur, resulting in a malfunction of the light source L. In addition, the luminance may change due to a change in luminance due to reflections on the floor surface caused by lighting of a lighting device such as a downlight, or the curtain may be shaken by the wind.

  In addition, when calculating the shape of the object from the image information captured by the image detection means, determining whether or not the monitored object is detected, and not detecting the monitored object, there is no human body in the detection region A technique for judging is also proposed (Patent Document 2).

Special Publication 2004-501496 JP 2000-138925 A

However, in the above system, since the lighting apparatus blinks and adjusts light according to the change in the image, for example, in the following cases, the change is detected in the image even if there is no movement of the person, causing a malfunction. It was.
1) Shadows of fixtures and furniture that appear and disappear when the lighting fixtures flash 2) Reflection of lighting fixtures due to the gloss of the floor that occurs and disappears when the lighting fixtures flash 3) Multiple lighting fixtures turn on When the lighting fixture inside is dimmed, the movement of the shadow that grows or shrinks due to the illuminance balance of multiple lights even though the object is not moving there. So, the shape of the room, the position of the lighting fixture, the fixture and furniture If the position information can be given to the decision circuit, the shadow position and reflection can be predicted and avoided. However, for that purpose, it is necessary to input three-dimensional data according to the room to be used. Is hard to say. In addition, it is difficult to cope with the movement of the fixtures and the redesign.

Details of the above problem will be described with reference to FIGS.
FIG. 7 shows an example of a living / dining room. The presence / absence of a person in the room is determined by the image sensor 100 installed near the center of the ceiling. FIG. 7 is a cross-sectional view of the room, and FIG. 8 is a schematic view of the image viewed from the image sensor 100. A wide-angle lens or a fish-eye lens is preferable for bird's-eye view of the entire room, and an actual image looks distorted, but here it is a schematic diagram excluding distortion for simplicity. In this example, the room is recognized by being divided into a dining part Rd and a living part Rl, and illuminated by the lighting fixtures L1 and L2 according to the presence / absence of the person in each part.
Now, a person M is present in the living room, the lighting fixture L2 is lit, and the lighting fixture L1 is off.
At this time, if the person M moves as indicated by the arrow in FIG. 8, the shadow MS also moves accordingly. When the camera 1 detects the movement of the shadow, it is determined that there is a person in the dining area Rd, and the lighting fixture L1 is erroneously turned on.

FIG. 9 schematically shows how a shadow of a fixture is created by a plurality of lighting fixtures. When the lighting fixtures L1 to L4 exist in the room, when the lighting fixtures L1 to L4 are lit alone, shadows S1 to S4 are generated correspondingly. Assuming that the room is multipurpose like a living / dining / kitchen and the zones where lighting should be switched are divided into four zones A1 to A4 as shown in FIG. 9, for example, the shadows S1 to S4 occur in any zone. there's a possibility that.
In addition, the flashing of each lighting fixture depends on the occupant's occupancy status, so the fixture does not always turn on alone, and the shadows generated by one lamp may be diluted or disappeared by irradiation from other fixtures. Sometimes.
For this reason, there is a possibility that the change of the shadow is erroneously determined as the movement of the person.

FIG. 10 is a diagram for explaining the reflection of the lighting fixture. When the floor is made of a material such as a flooring or a cushion floor and has a surface gloss, a reflected image of the lighting fixture L3 appears in the portion m3 reflected.
Even if there are shiny furniture such as tables and sofas, reflections will occur in the same way.
There is no problem as long as the lighting fixture L3 is lit at a certain brightness, but when the brightness changes gradually due to dimming at the moment when the lighting fixture L3 changes from turning off to turning on according to the person entering or leaving the living room RL. In the conventional system that captures images at regular intervals and determines the movement of the person based on the difference between the previous and next images, it is determined that a person is also present in the dining unit Rd, which causes a malfunction.

As described above, in any of the illumination systems of Patent Documents 1 and 2, when controlling a plurality of illumination sections, if an attempt is made to detect and control the presence of a person from image data, the shadow of a fixture that spans adjacent sections is controlled. Misdetections may occur due to occurrence / disappearance or movement of human shadows.
In addition, when the storage mode is activated in the daytime, data that may possibly malfunction may be collected later when there is a change in external light or the like during the storage sequence. Moreover, energy is wasted if a lighting scene is always executed at night.
The present invention has been made in view of the above circumstances, and when detecting a person using an image sensor and controlling a lighting apparatus group, a malfunction caused by a change in external light, a moving object other than a person It is an object of the present invention to provide a lighting control system that can reduce erroneous detection such as and can perform lighting control with high reliability.

Therefore, the illumination system of the present invention includes a light source, an image sensor that detects an image, a calculation unit that calculates a detection result from the output of the image sensor, and blinking / dimming of the light source based on the calculation result of the calculation unit. And a control unit that performs lighting control according to a preset scene for the light source based on a determination result of the determination unit, the control unit including: In the unmanned state, the lighting control of the light source according to a preset scene is performed, and the detection result of the image sensor of each scene obtained here is stored as unattended state data. from the detection result of the image sensor, the unattended data corresponding to the current scene, have rows calculation to cancel, wherein the control unit includes a changeover switch, by the changeover switch, a predetermined time In the case of performing the door to the storage mode, it is determined that unattended at night and was switchable and when moving to the storage mode when the obtained image different the previous day of the initial images or unattended data.
According to this configuration, unattended image data in each scene is acquired in advance, and luminance changes generated by blinking and dimming of each lighting fixture are stored even when no person is present. By canceling the unattended image data in, only the luminance change due to the actual movement of the person can be captured, and the occurrence of malfunction can be prevented.
In addition, when the storage mode is activated in the daytime, if there is a change such as outside light during the storage sequence, data that may possibly malfunction later is collected. Moreover, energy is wasted if a lighting scene is always executed at night. However, as described above, when the storage mode is executed every certain time as necessary, and when it is determined that the person is unattended at night and an image different from the initial image of the previous day is obtained, the storage mode is entered. Since switching is performed, unattended state data that is not affected by outside light can be acquired. In addition, unnecessary power consumption is not required.

Further, in the illumination system, before Symbol judging section judges that the person in any area where the image sensor takes charge does not exist, and, if the elapsed from the last storage mode a predetermined time or more, the control The unit performs a light source lighting control according to a preset scene, and executes a storage mode for storing the detection result of the image sensor of each scene obtained here as unmanned state data, the determination unit, the outside storage mode, the detection result of the current image sensor, the unattended data corresponding to the current scene, intends row operations cancel.
According to this configuration, image data in an unmanned state in each scene is acquired in advance at regular intervals, and brightness changes generated by blinking and dimming of each lighting fixture are stored in advance even when no person is present. By canceling unattended image data in the scene in question, it is possible to capture only luminance changes due to actual human movements and prevent malfunctions.

Further, the upper Symbol illumination system, wherein the control unit includes an initial setting switch, to migrate to the memory mode by pressing the initial setting switch.
With this configuration, unmanned state data can be stored immediately even when furniture or equipment is moved, the room is redesigned, and unattended state data can be stored accordingly.

Further, the upper Symbol illumination system, the light source is composed of a plurality of light sources, Ru lighting controllable der independently each light source.

  As described above, according to the present invention, unattended image data is acquired in advance, and even when no person is present, the luminance change caused by the blinking / dimming of each lighting fixture is stored. By doing so, it is possible to capture only the luminance change due to the actual movement of the person and to prevent the occurrence of malfunction.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIGS. 1 and 2 are an elevational explanatory view and a bird's-eye explanatory view showing an indoor situation using the lighting system of Embodiment 1 of the present invention, and FIG. 3 is a block diagram of this lighting system. FIG. 4 is a control flowchart of this illumination system. In this illumination system, as shown in FIGS. 1 and 2, the incandescent lamps L1 to L4 as light sources are attached to the ceiling, and a CCD camera as the image sensor 100 is attached to the center of the ceiling. The lighting of the dining unit Rd and the living unit Rl is automatically controlled.

  And this illumination system controls lighting of the four incandescent lamps L1-L4 as a light source, as shown in a block diagram in FIG. 3, and an image sensor 100 for detecting an image, and the image sensor 100 From the output, the calculation unit 200 that calculates the detection result, the determination unit 300 that determines the flashing / dimming of the incandescent lamps L1 to L4 from the calculation result of the calculation unit 200, and the result of the determination unit 300 is incandescent. The lighting system includes a control unit 400 that controls lighting of the lamps L1 to L4 according to a preset scene, and the determination unit 300 determines that no person is present in all the areas of the image sensor 100. And when a predetermined time or more has passed since the last storage mode, the control unit performs light source lighting control according to a preset scene, The storage mode for storing the obtained image sensor detection results for each scene as unmanned state data is executed, and the determination unit 300, except for the storage mode, determines the current scene from the current image sensor detection results. The calculation is performed by canceling the unmanned state data corresponding to the above.

The image sensor 100 is an image sensor using a lens having each image wider than at least the floor surface of a room, such as a fish-eye lens or a wide-angle lens. The determination unit 300 receives an image from the image sensor 100, determines a combination of blinking and dimming control for each incandescent lamp L <b> 1 to L <b> 4 individually or in groups, and transmits a control command to the lighting control circuit 400. It is a circuit and has a built-in timer section. The lighting control unit 400 is a luminaire controller that receives the signal from the determination unit 300 and actually blinks / dims each luminaire.
The determination unit 300 takes in the image data of the room from the image sensor 100 at regular time intervals, calculates a change between the most recent past image and the current image, and determines whether the change is a human movement. The circuit 301 includes a storage unit 302 that stores in advance image changes to be canceled.
Although not particularly shown in FIGS. 1 and 2, the judgment unit 300 and the lighting control unit 400 are integrated into a wall and are connected to each of the L1 to L4, and the individual appliances are manually flashed. Equipped with SW, dimming fader, scene memory switch, initial setting switch and security mode switching switch described later.

  Next, the operation of this illumination system will be described. The basic operation of the system is the same as a normal operation. When an image at a certain interval is captured from the image sensor 100, the previous image is compared with the current image, and there is a movement of a lump of luminance having a certain size, The lighting control unit is instructed to generate a blinking / dimming pattern of lighting fixtures (incandescent lamps L1 to L4) set in advance according to the position.

Here, the preset pattern is, for example, P1) If there is a person only in the dining area, it is determined that the scene is a meal scene, the lightings L1 and L3 of the dining area are all lit, and the lighting L2 and L4 of the living area are Dimming and dimming P2) If there are people in the living room and dining room, it is judged as a gathering scene, and the lightings L2, L4, L1, and L3 of the living / dining room are all lit P3) Only in the living room Is present, it is determined that the scene is a relaxing scene, the lights L2 and L4 in the living area are fully lit, the dimming area is dimly lit, etc. When manual dimming is performed, the user's preferences are automatically stored and the default scene is changed.

On the other hand, when the entire system is in operation and the determination unit determines that there is no person in the room and the timer count time has exceeded a predetermined time (for example, 6 hours or more since the previous absence detection), the determination unit is set. The lighting control circuit is instructed to switch all the scenes in order.
For example, when there are 4 types of scenes C1) All lights off → Scene X (X is 1-4)
C2) Scene X → All lights C3) Scene X1 → Scene X2 (X1 and X2 are 1-4)
It is.

At this time, if there is an image that is determined such that a block having a certain luminance moves, it is stored in the storage unit 302 as a cancel image.
On the other hand, in the case where it is determined that a person is present, and when a change in luminance is detected, the moving luminance lump is compared with the cancel image stored in the storage unit 302. , It is determined that it is not a human movement, and the corresponding blinking / dimming sequence is not activated.

Next, the operation of the illumination system of the present embodiment will be described in detail with reference to a flowchart.
Prior to the description, “movement between zones” refers to movement from a living room to a dining room, for example, depending on whether or not a person has moved between different lighting control zones.
In addition, "security mode" is an operation mode that automatically executes the storage mode at a certain time X interval at night, and when the house is absent, the lighting is turned on / off at night, etc. It can be disguised as a homemaker is at home.

  On the other hand, if the security is set to OFF when the housekeeper is at home, the storage mode does not light up at night unless there is a redesign or movement of fixtures in the daytime, which can contribute to energy saving.

FIG. 4 is a flowchart showing this illumination control operation.
First, the default is a control delay state (delay step S1001). Next, it is determined whether or not the initial setting switch is pressed (step S1002). If it is determined that the initial setting switch is not pressed, the image sensor 100 is determined. The indoor luminance information is acquired by performing imaging (step S1003).
Then, the calculation unit compares the acquired information with the luminance information of the image sensor before a certain time (step S1004), and checks whether there is a change from the luminance information before the certain time (step S1005).

  From this calculation result, when it is determined that a change has occurred from the luminance information of a predetermined time ago, the moving amount of the changed object M is checked, and the determination circuit 301 determines whether or not the moving amount is larger than a predetermined value. Thus, it is determined whether or not the movement is between zones (step S1006).

  If there is an image in which the amount of movement is determined to be larger than a predetermined value in this determination step S1006 and it is determined that a certain luminance block moves, it is stored in the storage unit 302 as a cancel image.

  On the other hand, when it is determined that a person is present and any luminance change is detected, the moving luminance block is compared with the cancel image in the storage unit 302 (step S1007).

  As a result of the comparison in the comparison step S1007, it is determined whether or not the image matches the cancel image (step S1008). If it is determined that the image matches, the image is determined not to be a human movement, and the process returns to the delay step S1001. Do not activate the corresponding flashing / dimming sequence.

  On the other hand, if it is determined in the determination step S1008 that they do not match, it is determined that there is a person and the corresponding blinking / dimming sequence is activated (step S1009).

If it is determined in the determination step S1005 that there is no change from the previous image, it is determined whether it is night (step S1010).
If it is not at night, the process returns to the delay step S1001 and the corresponding blinking / dimming sequence is not started.
If it is determined that it is nighttime in the determination step S1010, it is determined whether or not it is a security mode (step S1011). If it is determined that it is not a security mode, whether there is a change in the image when the storage mode is activated last time. It is determined whether or not (step S1012).

If it is determined that there is no change in the determination step S1012, the process returns to the delay step S1001, and the corresponding blinking / dimming sequence is not activated.
On the other hand, if it is determined that there is a change in this determination step S1012, it is determined whether or not the storage mode has been executed within a predetermined X time (step S1013), and it is determined that the storage mode has not been executed. Then, dimming for the storage mode is executed (step S1014).

Then, based on the output of the image sensor 100 at this time, as a result of the calculation performed by the calculation unit 200, if there is an image that is determined to move a block having a certain luminance, it is stored in the storage unit 302 as a cancel image. (Step S1015).
The storage mode execution time is stored in the storage unit 302 (step S1016), and the process returns to the delay step S1001.

  In the first embodiment, the storage mode for acquiring unattended image data at regular intervals is performed. However, in a place where there is no significant environmental change, unattended image data is acquired in advance, It may be stored and the stored data may be called up and used in the corresponding scene.

  For example, in a room such as a living / dining room, a lighting load of a lighting fixture that illuminates the inside of the living / dining room can be considered, but the present invention is not limited to this application. In this type of application, when lighting equipment is turned on when entering a room, lighting of the lighting equipment is usually required as long as there are people in the room. There may be no need. In addition, it is required to turn off the luminaire in a relatively short time after leaving the room.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.
In the invention of the first embodiment, the lighting apparatus is blinked and dimmed in order to acquire a cancel data image when a person is absent at regular intervals (for example, 6 hours) with a timer. You can expect the security effect of disguising as if you are at home when you are away. However, even if there is no change of pattern and the cancel image data when there is no change, the lighting sequence of the storage mode is activated, the number of times of lighting up when not present, and the waste of energy cannot be denied.

Therefore, in the present invention, when the housekeeper is normally at home / sleeping, the changeover switch can be used to determine that it is nighttime by a timer, and it is unmanned by sensor input and there is no change from the previous unmanned image. Only in the storage mode.
According to this configuration, since the number of times of starting the lighting device blinking sequence in the storage mode is reduced in normal times, energy is saved.

(Embodiment 3)
Next, a third embodiment of the present invention will be described.
In the inventions of the first and second embodiments, the storage mode is activated when a certain time elapses or when certain conditions are met. However, if the room is redesigned, such as moving furniture or fixtures, the stored unmanned image is different from the current unmanned image, which may cause malfunction. Therefore, in the present invention, the storage mode may be manually activated by operating the initial setting switch. Thereby, even if there is a pattern change, a correct unmanned state image can be acquired immediately after that and malfunction can be eliminated.

  In addition, this invention is not limited to the structure of the said embodiment, It can utilize also as a suspicious person detection apparatus in the system which monitors whether there is a suspicious person's invasion in a room | chamber interior. For example, by switching from normal control to security mode, if a suspicious person enters the room through a window after going to bed at night or while absent, the lighting equipment will turn on, an alarm will sound, Actions such as reporting to the person can be generated.

Elevation explanatory drawing which shows the illumination system of Embodiment 1 of this invention The bird's-eye view of the main part showing the illumination system of Embodiment 1 of the present invention The block diagram which shows the illumination system of Embodiment 1 of this invention The flowchart figure which shows the control action of the illumination system of Embodiment 1 of this invention. Explanatory drawing which shows the illumination system of a prior art example Explanatory drawing which shows the illumination system of a prior art example Explanatory drawing which shows the illumination system of a prior art example Explanatory drawing which shows the illumination system of a prior art example Explanatory drawing which shows the illumination system of a prior art example Explanatory drawing which shows the illumination system of a prior art example

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Image sensor 200 Arithmetic part 300 Judgment part 301 Judgment circuit 302 Storage part 400 Control part L Lighting fixture

Claims (4)

A light source;
An image sensor for detecting an image;
A calculation unit for calculating a detection result from the output of the image sensor;
From the calculation result of the calculation unit, a determination unit that determines blinking / dimming of the light source,
On the basis of the determination result of the determination unit, a lighting system including a control unit that performs lighting control according to a preset scene with respect to the light source,
The controller performs lighting control of the light source according to a preset scene in the unmanned state, and stores the detection result of the image sensor of each scene obtained here as unmanned state data,
The determining unit, from the detection result of the current image sensor, the unattended data corresponding to the current scene, have rows calculation to cancel,
The control unit includes a selection switch,
When the storage mode is executed every predetermined time by the selection switch, and when the mode is determined to be unattended at night and when the initial image of the previous day, that is, an image different from the unattended state data is obtained, the storage mode is entered. Lighting system that can be switched . The lighting system according to claim 1,
When the determination unit determines that there is no person in all the areas handled by the image sensor, and when a predetermined time or more has elapsed since the previous storage mode, the control unit responds to a preset scene. The light source lighting control is performed in a row, and the storage mode for storing the detection result of the image sensor of each scene obtained here as unmanned state data is executed.
The determination unit cancels the unmanned state data corresponding to the current scene based on the detection result of the current image sensor except for the storage mode, and performs calculation. The illumination system according to claim 1 or 2 ,
The control unit includes an initial setting switch,
An illumination system configured to shift to the storage mode by pressing the initial setting switch. The illumination system according to any one of claims 1 to 3 ,
The said light source is comprised with several light sources, and the lighting system which can carry out lighting control of each light source independently.

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