JP2010123533A - Illumination system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination system for detecting not only a person's existence but also a person's movement and providing a sufficient light only for a really necessary scene so as to obtain a high energy saving effect. <P>SOLUTION: The system includes an illumination fixture, a person detecting part, and a controlling part to control lighting up of the illumination fixture by receiving detected information from the person detecting part, and the person detecting part includes an image sensor, an image data obtaining means to obtain a person's image information from the image sensor, an extracting part to extracting a head of the person from the image data obtained by the image data obtaining means, a distance measuring sensor to measure a distance between the head of the person and the illumination fixture, and a determination part to decide a lighting state of the illumination fixture. The determination part calculates a height of the head from a distance from the distance measuring sensor to the head and a direction of a position of the head, and determines whether the peson is in standing position or in sitting position and if it is determined as the sitting position, an output of the illumination fixture is made larger than the standing position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lighting system, and more particularly, to a lighting system for realizing lighting control according to a human operation.

  Conventionally, a control technology for detecting infrared rays emitted by a person and blinking or dimming a lighting fixture has been proposed, and its practical application is progressing. When a person enters the detection range of the sensor, the amount of infrared rays incident on the sensor changes by an amount corresponding to the temperature difference between the human body surface and the background such as the floor or wall. Conventionally used sensors pay attention to this point, and when the amount of change exceeds a certain amount, it is determined that a person is present and controls the output of the luminaire. As a result, when there is no person, the lighting fixture can be turned off or dimmed, so that energy saving can be achieved.

For example, Patent Literature 1 proposes an illumination system that saves energy by detecting the presence of a person and turning on a desk lamp and dimming the general lamp according to the brightness. ing. Here, RFID (RADIO FREQUENCY IDENTIFICATION) is used as a human detection means.
Moreover, in patent document 2, when a heat ray sensor is installed in a ceiling part and a seating sensor is installed in a chair and one of them detects a person, a lighting fixture is turned on. As a result, it is possible to solve the problem that the lighting apparatus is turned off when the person is stationary for a long time. The seating sensor is assumed to be a pressure-sensitive type, a capacitance type, an infrared reflection type, an infrared transmission type, and the like.
Further, Patent Document 3 proposes a chair provided with a seating detection sensor and an operating device. The controller has an ON / OFF switch. When the switch is turned on, the lighting is automatically controlled based on the detection result of the seating detection sensor. When the switch is turned off, the lighting is forcibly turned off. As a result, it is possible to cope with the case where it is desired to darken even if there is a person like when using OHP. Patent Document 3 does not mention the method of the seating detection sensor.
Patent Document 4 proposes a method for preventing forgetting to turn off a task light by providing a pressure sensor on a chair, turning on a task light when pressure is sensed, and turning off when no pressure is sensed. Yes.

  In either case, the presence detection sensor is installed in the chair or in the vicinity thereof. Therefore, in order to transmit the detection result of the presence detection sensor to the control unit of the luminaire, it is necessary to connect the presence detection sensor and the control unit with a communication line or to install a wireless device. There is a problem that it is difficult and the installation cost is high.

JP 2007-184181 JP 2007-248111 A JP 2005-235532 A Japanese Patent Laid-Open No. 11-111045

  In offices and other places, people need brightness when they perform detailed visual tasks such as reading materials, writing letters, and creating something. On the other hand, it doesn't require much brightness in scenes that move on foot. In addition, the fine visual work of the former is often performed in a posture while sitting on a chair, and the latter movement is often performed in a standing posture.

  However, in the conventional technology, even if a person just crosses the detection range of the sensor, it is determined that a person is present. Therefore, even in a scene that does not require brightness, light is excessively provided, which is sufficient. There was a problem that the energy saving effect was not obtained.

  The present invention has been made in view of the above circumstances, and detects not only the presence of a person but also a person's action, and by providing sufficient light only for a scene that truly needs brightness, It aims at providing the lighting system which can acquire a high energy-saving effect.

Therefore, the lighting system of the present invention includes a lighting fixture, a human detection unit, and a control unit that receives detection information from the human detection unit and controls lighting of the lighting fixture, and the human detection unit includes an image. A sensor, an image data acquisition unit that acquires human image information from the image sensor, an extraction unit that extracts a human head from the image data acquired by the image data acquisition unit, and a human head. A distance measuring sensor for measuring a distance between the lighting device and a determination unit for determining a lighting state of the lighting device, wherein the determination unit includes a distance from the distance measuring sensor to a human head; , Calculate the height of the head from the direction in which the head is present, determine whether the person is standing or sitting, and if it is determined to be sitting, it is determined to be standing It is characterized in that the output of the luminaire is made larger than that in the case where it is made.
According to the above configuration, when the height of the person's head is measured, whether the person is standing or sitting is determined, and when it is determined that the person is sitting, it is determined that the person is standing Rather, the output of the lighting fixture is increased. When it is determined that the person is in the standing position, the output of the lighting fixture is made smaller than in the case where it is determined that the person is in the sitting position, so that a high energy saving effect can be expected.

In the illumination system according to the present invention, the determination unit determines whether a person is standing or sitting based on a change in the height of the head within a predetermined time.
According to this configuration, whether the person is standing or sitting is determined based on the amount of change in the height of the head within a predetermined time. Judging by the absolute value of the height of the head, it may be difficult to judge whether a tall person is sitting or a short person is standing, for example, an extremely short person In spite of being in a standing position, it may be misrecognized as being in a sitting position and the lighting may become uselessly brightened, but by using the change in the height of the head as a reference, Since the amount of change in the head height in the sitting position is smaller than the individual difference in height, the probability of erroneous recognition can be reduced.

In the lighting system according to the present invention, the determination unit may determine whether a person is standing or sitting in consideration of a moving distance of the head within a certain time. Features.
According to this configuration, when determining whether a person is standing or sitting, the moving distance of the head within a certain time is taken into consideration as a determination material. The moving distance of the head in the sitting position is smaller than that in the standing position. By taking this into consideration, the probability of erroneous recognition can be reduced.
For example, even if an extremely short person is mistakenly recognized as being in a sitting position despite being in a standing position, if the moving distance is large, it is determined that the person is in a standing position. Can be prevented.
On the other hand, an extremely tall person is sitting in the seat to determine that he is sitting if the distance traveled is small even if he is misrecognized as standing even though he is sitting. However, it is possible to prevent the problem of not being bright.

In the lighting system according to the present invention, when the determination unit determines whether there is a person from the acquired image data and determines that there is no person, the control unit outputs the output of the lighting fixture after a predetermined time has elapsed. It is characterized by being comprised so that it may fall.
According to this configuration, the determination unit determines the presence or absence of a person in the acquired image data, and when the control unit determines that there is no person, the output of the lighting fixture is reduced after a certain time has elapsed. It is characterized by doing. When there are no people, the output of the lighting fixture is further reduced, so energy is saved.

In the lighting system according to the present invention, it is possible to change the light distribution angle of the lighting fixture, and when the control unit determines that the lighting unit is in the sitting position, the control unit determines that the lighting device is in the standing position. The light distribution angle of the luminaire is made smaller than in the case where it is made.
According to this configuration, the lighting fixture has the light distribution control unit that controls the light distribution angle, and when the control unit is determined to be in the sitting position, the lighting unit is determined to be in the standing position. Is characterized in that the light distribution angle of the luminaire is reduced. In the sitting position, the light is squeezed to a necessary range, so that energy is saved.

  As described above, according to the present invention, the height of the head is measured, whether a person is standing or sitting is determined, and lighting control is performed based on the determination result. Therefore, detailed and lean lighting control can be performed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIG. 1 is an explanatory diagram showing an illumination system according to Embodiment 1 of the present invention, and FIG. 2 is a block diagram of this illumination system. As shown in the schematic explanatory diagram of FIG. 1, this illumination system is a luminance block that moves on a continuous image based on image information obtained by imaging using an image sensor attached in the vicinity of a spotlight as a light source. The lighting control is made possible based on the height position of the person's head.

  That is, as shown in the block diagram of FIG. 2, the lighting system includes a lighting fixture 300, a human detection unit 100, and a control unit 200 that receives detection information from the human detection unit 100 and controls lighting of the lighting fixture 300. The human detection unit 100 includes an image sensor 101, an image data acquisition unit 102 that acquires human image information from the image sensor 101, and an image data acquired by the image data acquisition unit. An extraction unit 103 that extracts a person's head, a distance measuring sensor 104 that measures a distance between the person's head and the lighting device, and a determination unit 105 that determines a lighting state of the lighting device. The determination unit 105 calculates the height of the head from the distance from the distance measuring sensor 104 to the head of the person and the direction in which the head exists, and whether the person is standing or sitting. Judging whether there is And when it is determined, rather than when it is determined that the standing, characterized in that so as to increase the output of the luminaire.

  Then, the control content for blinking / dimming the lighting fixture is selected according to the image information related to the person such as the position information of the person and the height of the head output from the image sensor 101, and the control signal is sent to the control unit. Is output, and the lighting state of the spotlight is controlled.

  The image sensor 101 only needs to capture a desired detection range and output the image information to the image data acquisition unit, and uses an infrared sensor, a solid-state imaging device such as a CCD image sensor or a CMOS image sensor. A wide-angle lens, a fish-eye lens, or the like. The image sensor 101 outputs image information captured at predetermined time intervals. An analog signal of an image output from the image sensor 101 is subjected to image control in the image data acquisition unit 102 and A / D converted in the control unit 200 to be converted into a digital signal. However, when a CMOS image sensor having a function of outputting a digital signal is used, A / D conversion in the control unit 200 becomes unnecessary. As an image picked up by the image sensor 101, a color image can be used, but in this embodiment, a monochrome grayscale image is used. The time interval captured by the image sensor 101 may be set as appropriate within a range in which the presence or absence of a moving object can be determined from time-series images obtained at the time interval.

  In addition, the image sensor 101 is often installed at a position higher than the person's presence position so that the control area can be seen from above. However, the image sensor 101 is not limited to this as long as the detection targeted by the present invention can be achieved. It may be installed on a wall or a floor. In addition to being installed alone, it may be integrated with the lighting fixture as a unit of the lighting fixture. The control area that the image sensor 101 should capture in the image can be arbitrarily set in advance by the user. Further, a specific area such as the vicinity of the desk is set in the control area.

The distance measuring sensor 104 detects the height h of the person's head by measuring the distance to the person's head detected by the image sensor 101. Here, the head height h can be calculated from the angle θ at which the image sensor 101 faces the top of the head and the distance d between the person and the image sensor 101 as shown in FIG.
h = H-dsinθ
H: Distance from the floor to the image sensor

  The control unit 200 stores in advance control contents for blinking and dimming the spotlight (300) according to a pattern such as the position and height of a person's head. Further, even when a moving luminance block M is generated by the procedure described later, the determination unit determines that the person is not a person according to the detection result of the image sensor 101, cancels the lighting control, and the luminance block. Only when it is determined that the person is a person, the lighting control is executed. Here, the control unit 200 also transmits / receives data to / from the determination unit 105, and can transmit / receive data to / from the determination unit 105 and the spotlight (300) as a light source. In addition to wired communication, this data transmission / reception includes standard for visible light communication, infrared data communication (IrDA), RF (Radio Frequency), Bluetooth (registered trademark), wireless LAN standard (IEEE802.11), Ethernet (registered trademark). Other communication methods such as wired LAN standards and power line communication may be used. The determination unit 105 and the control unit 200 may be formed on the same substrate.

In addition to a spotlight, the light source can be applied as long as it has a light emitting function, such as an incandescent lamp, a fluorescent lamp, and a light emitting diode element (LED).
The control unit 200 may be configured by an electromagnetic motor, a gear, or the like, and may include a mechanism unit configured to horizontally move, vertically move, or rotate the lamp. The drive mechanism control unit calculates the horizontal and vertical movement angles of the lamp from the coordinate data based on the position detection by the image sensor 101, calculates the irradiation range from the head position and height data, and the lamp Control the drive.

Next, the lighting control operation using the lighting fixture of the present embodiment will be described in detail.
FIG. 3 is a flowchart showing the control operation.

An image sensor 101 and a spotlight (300) are arranged above the desk D, and the image sensor 101 is configured to monitor a predesignated area. The image sensor 101 is composed of a CCD camera, and always takes a bird's-eye view of a predetermined area near the desk D and generates image information.
First, when the power is turned on, the control unit 200 turns on the spotlight as the lighting fixture 300 with the minimum brightness (Step 1001).
Next, the image sensor 101 captures an image in the detection range and sends the image data to the determination unit (Step 1002).

A judgment part detects a moving body by comparing with the previous image and taking the difference (Step 1003).
Here, first, the image sensor 101 detects a luminance block by a person as shown in FIG. 4, compares it with a reference image, performs a subtraction process, and binarizes this image data. Using the output after binarization, the determination unit determines whether the moving object is a person from the shape and size (Step 1004). If the determination unit determines that there is a person, the process proceeds to Step 1005. If it is determined that there is not, the process returns to Step 1002.

  The control unit 200 turns on the luminaire 300 with intermediate brightness (step S1005).

  Next, as in step S1002, the image sensor 101 captures an image in the detection range again and sends the image data to the determination unit 105 (Step 1006).

The determination unit 105 detects the moving object by comparing with the previous image and taking the difference (Step 1007). Next, the determination unit 105 extracts a human head from the image data of Step 7 (Step 1008).
Thereafter, the distance to the head is measured, and the result is sent to the determination unit 105 (Step 1009).
Further, the determination unit 105 calculates the head height h from the head direction and distance, and the ceiling height (Step 1010).

The determination unit determines whether the height of the head is equal to or less than a preset threshold value (Step 1011). If it is less than or equal to the threshold value, it is determined that it is the sitting position, and the process proceeds to Step 1012. In other cases, it is determined that the user is standing and the process returns to Step 2.
When it is determined in Step 1011 that it is in the sitting position, the control unit 200 turns on the lighting device 300 with the maximum brightness, and returns to Step 6.

  Here, the image sensor 101 installed in the vicinity of the spotlight monitors the vicinity of the desk D. It is assumed that the irradiable range of the spotlight and the monitoring range of the image sensor 101 are substantially the same.

  In this state, as shown in FIG. 1, when the presence of the person M is confirmed, the image sensor reacts, the spotlight irradiation range is adjusted by the operation of the flowchart, and the horizontal movement and the vertical movement are performed. The lighting of the spotlight is controlled, and spot irradiation is performed so as to provide a desired brightness in the vicinity of the person M.

  In this example, the lighting apparatus installed on the desk in the room has been described. However, for example, the present invention is applied to a sidelight arranged in a room such as a living room / dining room and a toilet lamp. The invention is not limited to this application. In this type of application, when lighting equipment is turned on at the time of entering a room, it is required to keep the lighting equipment turned on as long as there are people in the room. There may be no need. In addition, when it is required to turn off the luminaire in a relatively short time after leaving the room, control may be performed to meet the request.

With this configuration, since the irradiation area and the irradiation intensity can be increased or decreased according to the detection result of the human detection unit, an appropriate irradiation area can be set depending on the irradiation target. Moreover, since it is not necessary to consume useless electric power, the energy saving effect is also great.
In the present embodiment, the control unit 200 is configured to reduce the output of the lighting fixture 300 after a predetermined time has elapsed.
According to this configuration, the determination unit determines the presence or absence of a person in the acquired image data, and when the control unit determines that there is no person, the output of the lighting fixture is reduced after a certain time has elapsed. It is characterized by doing. When there are no people, the output of the lighting fixture is further reduced, so energy is saved.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.
FIG. 4 is an explanatory diagram showing an illumination system according to Embodiment 2 of the present invention, and FIG. 5 is a block diagram of this illumination system. In this illumination system, the distance measuring sensor 104 is used in the illumination system of the first embodiment. However, in this embodiment, instead of this, FIG. 4A is a schematic explanatory diagram, and FIG. As shown in the explanatory diagram of the principle, the difference is that the height h of the human head is calculated by the two image sensors using the principle of triangulation. That is, based on image information obtained by imaging using two image sensors, lighting control can be performed based on the height position of a person's head that is a luminance block moving on a continuous image. . Other parts are the same as those in the first embodiment.

  That is, as shown in a block diagram in FIG. 5, the lighting system includes a lighting device 300, a human detection unit 100, and a control unit 200 that receives detection information from the human detection unit 100 and controls lighting of the lighting device 300. The human detection unit 100 acquires image data of a person from the first and second image sensors 101a and 101b and the first and second image sensors 101a and 101b. Means 102, an extraction unit 103 that extracts a human head from the image data acquired by the image data acquisition unit, and a determination unit 105 that determines a lighting state of the lighting fixture. Detects the distance to the person's head and the direction in which the head exists, from the output of the extraction unit 103 and the positional relationship between the first and second image sensors 101a and 101b, Based on the detection result, the head height is calculated, it is judged whether the person is standing or sitting, and if it is determined that it is sitting, it is more than if it is determined that it is standing Is characterized in that the output of the lighting fixture is increased.

The determination unit 105 also includes a distance d to the head of the person detected by the first image sensor 101a, a line segment connecting the first and second image sensors 101a and 101b, and the first and second images. The height h of the human head is detected by measuring the angles Φ1 and Φ2 formed by the line segments connecting the sensors 101a and 101b and the head of the target person. Here, as shown in FIG. 4B, the height h of the head is the distance a between the angle θ at which the image sensor 101 faces the top of the head and the person and the first and second image sensors 101a and 101b. , Φ1 and Φ2 formed by the line segment connecting the first and second image sensors 101a and 101b and the line segment connecting the first and second image sensors 101a and 101b to the head of the target person. From the above, it can be calculated by the following formula.
d = a × sinΦ2 / sin (180−Φ1-Φ2)
h = H-dsinθ
H: Distance from the floor to the image sensor

  Next, illumination control is performed based on the height of the person's head thus obtained. The lighting control operation using the lighting fixture of the present embodiment may be similarly performed according to the flowchart described in the first embodiment.

(Embodiment 3)
Next, a third embodiment of the present invention will be described.
FIG. 6 is a flowchart showing the control operation.
A lighting system similar to that used in the first and second embodiments may be used, but in this embodiment, the determination unit 105 determines whether the human head height changes within a certain time. It is possible to determine whether or not is standing or sitting.

The lighting control operation of the present embodiment may be similarly performed according to the flowchart described in the first embodiment. However, in this embodiment, until the head height is calculated in Step 1010, This is the same as in the first and second embodiments.
That is, the distance to the head is measured using the first and second image sensors 101a and 101b, and the result is sent to the determination unit 105 (Step 1009).
Further, the determination unit 105 calculates the head height h from the head direction and distance, and the ceiling height (Step 1010).

  The determination unit calculates the amount of change in head height within a certain time (Step 1021).

The determination unit determines whether the head height has decreased by a certain value or more. If it decreases by a certain value or more, it is determined to be in the sitting position (Step 1022), and the process proceeds to Step 1023.
In Step 1023, the lighting apparatus is turned on with the maximum brightness, and the process returns to Step 1006 to perform the next image acquisition operation.

On the other hand, if it is determined in Step 1022 that the head height has not decreased by a certain value or more, it is determined whether or not the head height has increased by a certain value or more (Step 1024).
If it is determined in Step 1024 that the height of the head has increased by a certain value or more, the process returns to Step 1002 to perform an image acquisition operation.
On the other hand, if it is determined in Step 1024 that the head height has not increased by a certain value or more, the process returns to Step 1006 to perform an image acquisition operation.

  According to this configuration, whether the person is standing or sitting is determined based on the amount of change in the height of the head within a predetermined time. Judging by the absolute value of the height of the head, it may be difficult to determine whether a tall person is sitting or a short person is standing, for example, an extremely short person Despite being in a standing position, it may be misrecognized as being in a sitting position, and the lighting may become uselessly bright, but by using the change in the height of the head as a reference, Since the amount of change in the head height in the sitting position is smaller than the individual difference in height, the probability of erroneous recognition can be reduced.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described.
FIG. 7 is a flowchart showing the control operation.
A lighting system similar to that used in the first and second embodiments may be used. In this embodiment, the determination unit 105 determines whether a person is standing or sitting. Further, the determination is made in consideration of the movement distance of the head within a certain time.

The lighting control operation of the present embodiment may be similarly performed according to the flowchart described in the first embodiment. However, in this embodiment, the head height is calculated in Step 1010 and the head height is calculated in Step 1011. The process is the same as in the first and second embodiments until it is determined whether or not the height is equal to or less than the threshold value.
That is, the distance to the head is measured using the first and second image sensors 101a and 101b or the distance measuring sensor, and the result is sent to the determination unit 105 (Step 1009).
Further, the determination unit 105 calculates the head height h from the head direction and distance, and the ceiling height (Step 1010).

  The determination unit determines whether or not the head height is equal to or less than a preset threshold value (Step 1011).

When determining that the height of the head is equal to or less than the threshold, the determination unit measures the movement distance of the head within a certain time (Step 1032). On the other hand, if the determination unit determines that the height of the head is not equal to or less than the threshold value, the determination unit returns to step 1002 and acquires the next image data.
Subsequently, the determination unit measures the moving distance of the head within a certain time (Step 1032).
Then, it is determined whether or not the moving distance of the head is equal to or less than a preset threshold value (Step 1033). If it is equal to or less than the threshold value, the process proceeds to Step 1034, and at Step 1034, the lighting apparatus is turned on with the maximum brightness. Return to the next image acquisition operation.

According to this configuration, when determining whether a person is standing or sitting, the moving distance of the head within a certain time is taken into consideration as a determination material. The moving distance of the head in the sitting position is smaller than that in the standing position. By taking this into consideration, the probability of erroneous recognition can be reduced.
By adopting this configuration, even if an extremely short person is mistakenly recognized as being in the sitting position despite being in the standing position, if the moving distance is large, it is determined that the person is standing. It is possible to prevent the illumination from becoming unnecessarily bright.
On the other hand, an extremely tall person is sitting in the seat to determine that he is sitting if the distance traveled is small even if he is misrecognized as standing even though he is sitting. However, it is possible to prevent the problem of not being bright.

(Embodiment 5)
Next, a fifth embodiment of the present invention will be described.
FIG. 8 is a flowchart showing the control operation.
Also in the present embodiment, the illumination system may be the same as that used in the first and second embodiments. In the fourth embodiment, when it is determined that the height of the head is not equal to or less than the predetermined threshold value, the movement distance of the head within a predetermined time is further measured, and the movement distance is determined to be equal to or less than the predetermined threshold value. In some cases, the brightness of the luminaire is maximized to increase the output of the luminaire.

The lighting control operation of the present embodiment may be similarly performed according to the flowchart described in the first embodiment. However, in this embodiment, the head height is calculated in Step 1010 and the head height is calculated in Step 1011. The process is the same as in the first and second embodiments until it is determined whether or not the height is equal to or less than the threshold value.
That is, the distance to the head is measured using the first and second image sensors 101a and 101b or the distance measuring sensor, and the result is sent to the determination unit 105 (Step 1009).
Further, the determination unit 105 calculates the head height h from the head direction and distance, and the ceiling height (Step 1010).

  The determination unit determines whether or not the head height is equal to or less than a preset threshold value (Step 1011).

If the determination unit determines that the height of the head is not less than or equal to the threshold value, then the determination unit measures the movement distance of the head within a certain time (Step 1042).
Then, it is determined whether or not the moving distance of the head is equal to or less than a preset threshold value (Step 1043). If it is equal to or less than the threshold value, the process proceeds to Step 1044, and at Step 1044, the lighting apparatus is turned on at the maximum brightness and the process returns to Step 1006. Then, the next image acquisition operation is performed.

  On the other hand, if it is determined in Step 1011 that is the determination step that the height of the head is equal to or less than the threshold value, the determination unit proceeds to Step 1044, and in Step 1044, the lighting apparatus is turned on with the maximum brightness.

  According to this configuration, even when it is determined that the height of the head is not less than or equal to the threshold value, the brightness of the lighting fixture is not increased as it is, and it is further determined whether or not the moving distance is equal to or less than the threshold value. When the moving distance is less than or equal to the threshold value, the output of the luminaire is increased on the assumption that the person is standing, reading, working, or looking at a picture. On the other hand, when the moving distance is not less than or equal to the threshold value, the output of the luminaire is lowered, so that energy is saved.

  In the above embodiment, in addition to the identification based on the presence / absence, the sitting position and the standing position are identified, so that the necessary illuminance can be classified and controlled step by step according to the situation. . As shown in an example in FIG. 9, this stepwise classification is classified as 100% when there is a person and sitting, 50% when there is a person and standing, and 25% when there is no person. . Therefore, significant energy saving can be achieved.

(Embodiment 6)
Next, a sixth embodiment of the present invention will be described.
10 and 11 are explanatory diagrams showing an illumination system using a plurality of light sources.
The lighting fixture 500 used in the present embodiment is an array of six LEDs that can be independently controlled for lighting, and is configured to be able to change the light distribution angle.
Here, for example, in the first embodiment, the control unit 200 shown in FIG. 2 is more likely to be in the lighting apparatus when the determination unit 105 determines that it is in the sitting position than when it is determined that it is in the standing position. The light distribution angle is controlled to be small.

  FIG. 10 shows a case where it is determined that it is in a sitting position, and FIG. 11 shows a case where it is determined that it is in a standing position, and when it is determined that it is in a sitting position, it is determined that it is in a standing position. Rather, the light distribution angle of the lighting fixture is made smaller. For the control, the flowcharts shown in the first to fifth embodiments may be used.

  According to this configuration, the lighting fixture has the light distribution control unit that controls the light distribution angle, and when the control unit is determined to be in the sitting position, the lighting unit is determined to be in the standing position. Is characterized in that the light distribution angle of the luminaire is reduced. In the sitting position, the light is squeezed to a necessary range, so that energy is saved.

  In the above-described embodiment, the control operation greatly changes depending on how the reference value is determined for the head height and the amount of change in the head height. The present applicants examine various data, determine a reference value in accordance with people's lives at that time, and perform lighting control based on this reference value. An example is shown in FIGS. Both are data from AIST Digital Human Research Center.

  For example, as shown in FIG. 12, the height of the head can be obtained from a human body size database by dividing it into a young person, an elderly person, and further, a male and a female, in each case. Therefore, if the target person cannot be identified, an average value may be created, and threshold values for sitting and standing may be set. When the user is determined, a threshold reference value may be selected from stepwise data. Furthermore, lighting control can be performed with extremely high accuracy by setting individual user data as a reference value at home and the like.

  For example, as for the amount of change in the head height, as shown in FIG. 13, the values for each case are obtained from the human body size database divided into young people, elderly people, and men and women. Can do. Here again, if the target person cannot be identified, an average value may be created and the change amount sitting and standing thresholds may be set. When the user is determined, a threshold reference value may be selected from stepwise data. Furthermore, lighting control can be performed with extremely high accuracy by setting individual user data as a reference value at home and the like.

  The head height and the amount of change shown in FIG. 12 and FIG. 13 can be calculated from the data of the extension and the sitting height shown in FIGS. Both are data from AIST Digital Human Research Center. As for the head height in the sitting position, 400 nm is added as the standard height of the chair from this data to the sitting height data.

Explanatory drawing which shows the lighting fixture of Embodiment 1 of this invention The block diagram which shows the lighting fixture of Embodiment 1 of this invention The flowchart figure which shows the control operation of the lighting fixture of Embodiment 1 of this invention. Explanatory drawing which shows the lighting fixture of Embodiment 2 of this invention The block diagram which shows the lighting fixture of Embodiment 2 of this invention The flowchart figure which shows the control action of the lighting fixture of Embodiment 3 of this invention. The flowchart figure which shows the control action of the lighting fixture of Embodiment 4 of this invention The flowchart figure which shows the control operation of the lighting fixture of Embodiment 5 of this invention. The figure which shows the operation example of the lighting fixture of embodiment of this invention The figure which shows the example of irradiation of the lighting fixture of the lighting system of Embodiment 6 of this invention. The figure which shows the example of irradiation of the lighting fixture of the lighting system of Embodiment 6 of this invention. The table | surface figure which shows the height of the head used as the reference | standard data of operation | movement of the lighting fixture of the lighting system of embodiment of this invention The table which shows the variation | change_quantity of the head height used as the reference | standard data of operation | movement of the lighting fixture of the lighting system of embodiment of this invention The table which shows the height used as the reference | standard data of operation | movement of the lighting fixture of the lighting system of embodiment of this invention The table which shows the seat height used as the reference | standard data of operation | movement of the lighting fixture of the lighting system of embodiment of this invention

Explanation of symbols

100 human detection unit 200 control unit 300 lighting fixture

Claims (5)

Lighting equipment,
A human detection unit;
A control unit that receives the detection information of the human detection unit and controls the lighting of the lighting fixture;
The human detection unit includes an image sensor, an image data acquisition unit that acquires human image information from the image sensor, and an extraction unit that extracts a human head from the image data acquired by the image data acquisition unit. And a distance measuring sensor for measuring a distance between a human head and the lighting fixture, and a determination unit for determining a lighting state of the lighting fixture,
The determination unit calculates the height of the head from the distance from the distance measuring sensor to the person's head and the direction in which the head exists, and determines whether the person is standing or sitting. And when it judges that it is a sitting position, the lighting system which makes the output of a lighting fixture larger than the case where it judges that it is a standing position. The lighting system according to claim 1,
The determination unit is a lighting system configured to determine whether a person is in a standing position or a sitting position based on a change in the height of the head within a predetermined time. The illumination system according to claim 1 or 2,
The determination unit is an illumination system that determines whether a person is in a standing position or a sitting position in consideration of a moving distance of the head within a predetermined time. The lighting system according to claim 1,
When the determination unit determines the presence or absence of a person from the acquired image data and determines that there is no person, the control unit is configured to reduce the output of the lighting fixture after a predetermined time has elapsed. The illumination system according to any one of claims 1 to 4,
The light fixture can change a light distribution angle, and when the control unit determines that the lighting unit is in the sitting position, the control unit distributes the lighting device more than when it is determined to be in the standing position. An illumination system that reduces the light angle.

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