JP2022168656A - Lighting device and lighting control method - Google Patents

Abstract

To provide a lighting device capable of performing control to change the lighting time when detecting a robot and when detecting a person.SOLUTION: The lighting device includes: a reception unit 15 that receives signals from a moving body 20; a person detection sensor 13 that detects the existence of a human body 30; and a control unit 12 that controls a light source 14 to change the light emission mode of depending on whether the reception unit 15 has received a signal, and whether the person detection sensor 13 has detected the presence of a human body 30.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to lighting devices and lighting control methods.

In spaces such as warehouses where picking robots coexist with people, lighting needs to be controlled by detecting people or picking robots. In Patent Document 1, if the turn-off time when a person is absent is short, that time is regarded as the person's presence time, and if the ratio of the total attendance period to the total absence time is high, the lighting maintenance time is calculated. Luminaires are disclosed that have a longer and, if the ratio is lower, a shorter hold time. Further, Patent Document 2 discloses a position information management system in which a robot is equipped with a function of emitting infrared rays using a heater or the like, and the robot is also detected by a heat ray sensor for detecting a person.

JP 2010-009843 A JP-A-2005-061934

However, the technique disclosed in Patent Document 1 detects the presence or absence of a person, but does not disclose a technique for detecting a robot. Moreover, the technique disclosed in Patent Document 2 has a problem that the power consumption of the heater mounted on the robot is wasted.

Accordingly, the present disclosure provides a lighting device that performs control to change the light emission mode depending on whether a robot is detected or a person is detected.

A lighting device according to an aspect of the present disclosure includes a receiving unit that receives a signal from a moving body, a human detection sensor that detects the presence of a human body, whether or not the receiving unit has received the signal, and and a control unit that changes the light emission mode of the light source according to whether the detection sensor has detected the presence of the human body.

A lighting control method according to an aspect of the present disclosure includes a receiving step of receiving a signal from a moving object, a human detection step of detecting the presence of a human body, and whether or not the signal has been received in the receiving step, or and a control step of controlling a light source to change a light emission mode of the light source according to whether or not presence of the human body is detected in the human detection step.

In addition, these general or specific aspects may be realized by an apparatus, method, integrated circuit, computer program, or a recording medium such as a computer-readable CD-ROM. and any combination of recording media.

A lighting device or the like according to an aspect of the present disclosure can perform control to change the light emission mode depending on whether a robot is detected or a person is detected.

FIG. 1 is a block diagram of a lighting device according to Embodiment 1. FIG. FIG. 2 is a diagram showing an outline of a lighting device, a moving object, and a person according to Embodiment 1. FIG. FIG. 3 is a flow chart showing the operation of the lighting device when a person is detected according to the first embodiment. FIG. 4 is a flowchart showing the operation of the lighting device when detecting a moving object according to the first embodiment. FIG. 5 is a time chart showing the lighting time of the lighting device according to Embodiment 1. FIG. FIG. 6 is another time chart representing the lighting time of the lighting device according to the first embodiment. 7 is a block diagram of a lighting device according to Embodiment 2. FIG. FIG. 8 is a sequence diagram when a position is acquired from the wireless tag of the lighting device according to the second embodiment. FIG. 9 is a sequence diagram when a position is acquired by visible light communication of the lighting device according to the second embodiment. FIG. 10 is a flow chart showing the operation of the lighting device according to the second embodiment.

Hereinafter, embodiments will be specifically described with reference to the drawings.

It should be noted that the embodiments described below are all comprehensive or specific examples. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are examples, and are not intended to limit the scope of the claims. In addition, among the constituent elements according to the following embodiments, constituent elements that are not described in independent claims indicating the highest concept will be described as optional constituent elements. Also, each figure is not necessarily strictly illustrated. In each figure, substantially the same configurations are denoted by the same reference numerals, and overlapping descriptions are omitted or simplified.

Each figure is a schematic diagram and is not necessarily strictly illustrated. Moreover, in each figure, the same code|symbol is attached|subjected with respect to substantially the same structure, and the overlapping description may be abbreviate|omitted or simplified.

(Embodiment 1)
[Overview of lighting device]
First, an overview of the lighting device according to Embodiment 1 will be described. FIG. 1 is a block diagram of a lighting device according to Embodiment 1. FIG. The lighting device 10 includes a lighting circuit section 11 , a control section 12 , a human detection sensor 13 , a light source 14 and a reception section 15 . A plurality of lighting devices 10 are usually installed in a space where moving bodies 20 and people coexist, such as warehouses and factories.

The lighting circuit unit 11 receives control from the control unit 12 and causes the light source 14 to emit light. Specifically, the lighting circuit section 11 applies a voltage to the light emitting element. The lighting circuit section 11 is implemented by an AC-DC converter circuit, a DC-DC converter circuit, or the like.

The control unit 12 controls the lighting circuit unit 11 based on the output from the human detection sensor 13 or the signal received by the receiving unit 15 . The control unit 12 is implemented by a processor and memory. Also, the control unit 12 may be realized by a dedicated microcomputer or the like. Based on a signal transmitted from the human detection sensor 13 or a signal received by the reception unit 15, the control unit 12 starts a lighting maintenance timer included in the lighting circuit unit 11, or resets the lighting maintenance timer. Also, it controls the lighting circuit unit 11 to select the dimming level of the lighting device 10 or the light source 14 .

Further, when receiving a signal from the human detection sensor 13, the control unit 12 determines that the human body 30 has been detected. At this time, the control unit 12 may determine that the human body 30 has been detected when receiving a signal indicating that the human body 30 has been detected from the human detection sensor 13 a plurality of times in succession.

The human detection sensor 13 detects a human body 30 present at a predetermined distance from the lighting device 10 . The human detection sensor 13 is realized by a heat ray sensor (PIR (Passive Infrared Ray) sensor) such as a pyroelectric infrared sensor. The heat ray sensor detects the difference between the input values before and after the change when the amount of heat ray incident on the heat ray sensor changes. Alternatively, the human detection sensor 13 may be a radio sensor. The radio sensor is a so-called Doppler sensor, which detects changes in the frequency of the transmitted wave and the received wave reflected by a moving object. Alternatively, the human detection sensor 13 may be an image sensor. The image sensor detects the human body 30 by detecting temporal differences in images.

The human detection sensor 13 detects a human body 30 present at a predetermined distance, for example, within a range illuminated by the lighting device 10 , and transmits a signal indicating that the human body 30 has been detected to the controller 12 .

That is, the human detection sensor 13 acquires human body information by detecting the human body 30 existing at a predetermined distance. The human detection sensor 13 transmits the acquired human body information to the control unit 12 . Alternatively, the human detection sensor 13 may transmit a signal indicating that the human body information has been acquired to the controller 12 .

The light source 14 emits light under the control of the lighting circuit section 11 . The light source 14 is, for example, an LED (Light Emitting Diode) or an organic EL (Electro Luminescence). Alternatively, light source 14 may be a discharge lamp light source, such as a fluorescent lamp, or an incandescent lamp.

The light source 14 includes a white lighting light source and a red lighting light source, and may be switched when the moving object 20 and the human body 30 are detected. Specifically, when the light source 14 is an RGB-LED light source, the light source 14 simultaneously turns on the R-LED, G-LED, and B-LED when detecting the human body 30, and when detecting the moving object 20, The light source 14 may light only the R-LED. Alternatively, the light source 14 may include a visible light source and a near-infrared light source, and may be switched when the moving object 20 and the human body 30 are detected.

The receiving unit 15 receives a signal transmitted from the mobile object 20 . The receiver 15 is realized by an infrared receiver. Upon receiving the signal from the moving object 20 , the receiving unit 15 transmits the received signal to the control unit 12 . Alternatively, when receiving a signal from the moving object 20, the receiving unit 15 may transmit a signal to the control unit 12 to notify that the signal has been received.

That is, when the signal expected to be received is an infrared remote control signal, the receiving unit 15 is implemented by an infrared remote control light receiving module, and converts the received signal into a digital signal that can be processed by the control unit 12 . Alternatively, if the signal expected to be received is a radio wave signal, the receiving section 15 is realized by a radio signal receiving section including an antenna. At this time, the control unit 12 receives only the signal indicating the address assigned to the lighting device 10 and ignores the signals other than the signal indicating the address assigned to the lighting device 10 . The receiving unit 15 may also serve as the remote control signal receiving unit when the user manually sets the dimming level or the lighting holding time of the lighting device 10 using the remote control transmitter.

The moving body 20 is a mobile robot such as a picking robot used in a warehouse or the like. The moving body 20 has a signal transmission section 21 . Further, the moving body 20 includes a motor and a position detection section, and moves by driving the motor based on the position information detected by the position detection section. In addition, the moving object 20 transmits a signal that notifies the presence of the moving object 20 from the signal transmission unit 21 to the lighting device 10 . The moving object 20 may periodically transmit a signal toward the ceiling in the moving direction. The area or time period in which the signal transmission unit 21 of the moving object 20 transmits signals may be limited.

For example, the mobile object 20 acquires the location information of the location where the wireless tag 40 exists from the wireless tag 40 embedded in the floor, and compares the map information stored in the memory of the mobile object 20 with the acquired location information. Match and move. Alternatively, the moving body 20 is equipped with LiDAR (Light Detection and Ranging) or the like, which is an active sensor using an image sensor, a laser, an infrared sensor, or the like. Or you can move around the factory. The radio tag 40 will be described later.

The signal transmission unit 21 transmits a signal toward the lighting device 10 . The signal transmitted by the signal transmitter 21 is, for example, an infrared signal with a central wavelength of 900 nm or more and 950 nm or less. The signal transmission unit 21 periodically transmits a signal to the illumination device 10 located at the destination of the moving body 20 . The signal transmitted by the signal transmission unit 21 is not limited to the above infrared signal. The signal transmitted by the signal transmission unit 21 may be a radio wave signal containing address information of the lighting device 10 associated with the location information of the location where the moving object 20 exists.

[Outline of operation of lighting device]
Next, an overview of the operation of the lighting device 10 will be described. The moving body 20 moves autonomously in a space such as a warehouse where people and the moving body 20 coexist, so that the image sensor of the moving body 20 can obtain the necessary illuminance, or the person is moving. In order to obtain the illuminance necessary for visually recognizing the moving object 20, the illumination device 10 needs to be appropriately controlled.

FIG. 2 is a diagram showing an outline of a lighting device, a moving object, and a person according to Embodiment 1. FIG. When the controller 12 of the lighting device 10 receives a signal indicating that the human body 30 has been detected from the human detection sensor 13, it triggers the lighting hold timer provided in the lighting circuit unit 11, and the lighting hold timer is set for a certain period of time after being triggered. to count. The control unit 12 causes the lighting circuit unit 11 to light the light source 14 brightly while the lighting holding timer is counting, so that the light source 14 is kept lit for a certain period of time even if the human body 30 becomes stationary. maintain. Here, bright lighting means emitting light at 100% lighting, which is the rated lighting of the lighting equipment. In contrast to bright lighting, dark lighting is, for example, 20% dimming lighting.

When the controller 12 receives a signal indicating that the human body 30 has been detected again from the human detection sensor 13 while the lighting maintenance timer is counting, the controller 12 resets the lighting maintenance timer count, extends the lighting maintenance timer count, and turns on the lighting. The time for which the circuit unit 11 causes the light source 14 to be brightly lit is extended. Then, when the count of the lighting holding timer ends, the control section 12 causes the lighting circuit section 11 to dimly light the light source 14 . At this time, the control section 12 may cause the lighting circuit section 11 to turn off the light source 14 . Note that the control unit 12 may cause the lighting circuit unit 11 to perform the operation of dimly lighting or extinguishing the light source 14 by a fade-out operation. Here, dark lighting means that the light source 14 emits light darker than the normal state.

When the control unit 12 receives a signal from the receiving unit 15 indicating that the signal from the moving body 20 has been received, the control unit 12 triggers the lighting holding timer provided in the lighting circuit unit 11, and the lighting holding timer counts a certain period of time after being triggered. . The control unit 12 causes the lighting circuit unit 11 to brightly light the light source 14 while the lighting holding timer is counting. The counting time of the lighting maintenance timer when the receiving unit 15 receives the signal from the moving body 20 is the counting time of the lighting maintenance timer when the control unit 12 receives the signal indicating that the human body 30 has been detected from the human detection sensor 13. shorter than

FIG. 3 is a flow chart showing the operation of the lighting device when a person is detected according to the first embodiment.

First, the control unit 12 determines whether or not the human detection sensor 13 has detected the human body 30 (step S100). The human detection sensor 13 is, for example, a heat ray sensor, and when detecting a change in the amount of heat generated by the movement of the human body 30 , transmits a signal indicating that the human body 30 has been detected to the control unit 12 .

When the control unit 12 determines that the human detection sensor 13 has detected the human body 30 (Yes in step S100), the control unit 12 brightly lights the light source 14 for a certain period of time (step S101). That is, the control unit 12 causes the lighting circuit unit 11 to brightly light the light source 14 for a certain period of time. Specifically, the control unit 12 causes the lighting circuit unit 11 to brightly light the light source 14 for a time determined to cause the light source 14 to emit light when the human body 30 is detected. Here, the control unit 12 causing the light source 14 to emit light may mean that the control unit 12 causes the light source 14 to emit light brighter than in a normal state.

When the control unit 12 determines that the human detection sensor 13 has not detected the human body 30 (No in step S100), the control unit 12 dims the light source 14 (step S102). That is, the control unit 12 does not cause the lighting circuit unit 11 to cause the light source 14 to emit light. For example, the lighting circuit unit 11 does not cause the light source 14 to emit light, which means that the light source 14 is set to a dimming rate of 50%, but the light source 14 may be turned off.

FIG. 4 is a flowchart showing the operation of the lighting device when detecting a moving object according to the first embodiment.

First, the control unit 12 determines whether or not the receiving unit 15 has detected the moving object 20 (step S200). The receiving unit 15 is, for example, a heat ray sensor, and when receiving a signal transmitted by the moving object 20 , transmits a signal indicating that the moving object 20 has been detected to the control unit 12 .

When the control unit 12 determines that the receiving unit 15 has detected the moving object 20 (Yes in step S200), the control unit 12 brightly lights the light source 14 for a certain period of time (step S201). That is, the control unit 12 causes the lighting circuit unit 11 to emit light from the light source 14 for a certain period of time. Specifically, the control unit 12 causes the lighting circuit unit 11 to brightly light the light source 14 for a time determined to cause the light source 14 to emit light when the moving object 20 is detected. Here, the control unit 12 causing the light source 14 to emit light may mean that the control unit 12 causes the light source 14 to emit light brighter than in a normal state.

When the control unit 12 determines that the receiving unit 15 has not detected the moving object 20 (No in step S200), the control unit 12 dims the light source 14 (step S202). That is, the control unit 12 causes the lighting circuit unit 11 to dimly light the light source 14 . For example, the lighting circuit unit 11 does not cause the light source 14 to emit light, which means that the light source 14 is set to a dimming rate of 50%, but the light source 14 may be turned off.

Next, the time during which the lighting device 10 according to the embodiment turns on the light source 14 will be described in detail. FIG. 5 is a time chart showing the lighting time of lighting device 10 according to the first embodiment. When the lighting device 10 detects the human body 30, the lighting device 10 emits light for the time T1. When the lighting device 10 detects the human body 30 again while the lighting device 10 detects the human body 30 and emits light for the time T1, the control unit 12 resets the lighting holding timer, and the lighting circuit unit 11 Light source 14 is turned on again for time T1.

Similarly, lighting device 10 emits light for time T2 when mobile object 20 is detected. Time T2 is shorter than time T1. When the lighting device 10 detects the moving body 20 again while the lighting device 10 detects the moving body 20 and emits light for the time T2, the control unit 12 resets the lighting holding timer, and the lighting circuit unit 11, the light source 14 is turned on again for time T2. Here, the control unit 12 causing the light source 14 to emit light may mean that the control unit 12 causes the light source 14 to emit light brighter than in a normal state.

FIG. 6 is another time chart representing the lighting time of the lighting device according to the first embodiment. As described with reference to FIG. 5, lighting device 10 emits light for time T1 when human body 30 is detected. When the lighting device 10 detects the moving object 20 while the lighting device 10 detects the human body 30 and emits light for the time T1, the control unit 12 resets the lighting holding timer and causes the lighting circuit unit 11 to turn on again. , time T1 causes the light source 14 to emit light. That is, when the lighting device 10 detects the moving body 20 while the lighting device 10 detects the human body 30 and emits light for the time T1, the control unit 12 causes the lighting circuit unit 11 to emit the light source 14 for the time T2. Instead, the light source 14 is turned on again for a time T1. Here, the control unit 12 causing the light source 14 to emit light may mean that the control unit 12 causes the light source 14 to emit light brighter than in a normal state.

Further, as described with reference to FIG. 5, when the moving object 20 is detected, the lighting device 10 emits light for the time T2. Time T2 is shorter than time T1. When the lighting device 10 detects the human body 30 while the lighting device 10 detects the moving object 20 and emits light for the time T2, the control unit 12 resets the lighting holding timer, and the lighting circuit unit 11 Time T1 Light source 14 is turned on. Here, the control unit 12 causing the light source 14 to emit light may mean that the control unit 12 causes the light source 14 to emit light brighter than in a normal state.

When the count of the lighting holding timer ends, the control section 12 causes the lighting circuit section 11 to dimly light the light source 14 and return to the dark lighting state. For example, dark lighting means that the light source 14 is set to a dimming rate of 50%, but it may be turned off. At this time, while the light source 14 is transitioning to dark lighting by a fade-out operation under the control of the lighting circuit section 11, it is considered to be bright lighting.

(Embodiment 2)
[Overview of lighting device]
Next, the illumination device according to Embodiment 2 will be described. FIG. 7 is a block diagram of lighting device 10a according to the second embodiment. The illumination device 10a includes a lighting circuit portion 11, a control portion 12, a human detection sensor 13, an R-LED light source 14-1, a G-LED light source 14-2, a B-LED light source 14-3, and a receiving portion 15. Here, the R-LED light source 14-1, the G-LED light source 14-2, and the B-LED light source 14-3 may be collectively expressed as the light source 14. FIG. Note that the description of the configuration common to the lighting device 10 in the lighting device 10a is omitted. The moving object 20 a also includes a signal transmission unit 21 , a camera 22 and a tag reader 23 . In addition, the description of the configuration common to the mobile body 20 in the mobile body 20a is omitted.

The R-LED light source 14-1 is a red LED light source. The R-LED light source 14-1 is an LED in which a P-type semiconductor and an N-type semiconductor are PN-junctioned. Aluminum, gallium, or arsenic may be used for the LED chip in the R-LED light source 14-1. Also, the R-LED light source 14-1 emits light with a wavelength of around 660 nm.

The G-LED light source 14-2 is a green LED light source. The G-LED light source 14-2 is an LED in which a P-type semiconductor and an N-type semiconductor are PN-junctioned. Aluminum or arsenic may be used for the LED chip in the G-LED light source 14-2. Also, the G-LED light source 14-2 emits light with a wavelength of around 520 nm.

The B-LED light source 14-3 is a blue LED light source. The B-LED light source 14-3 is an LED in which a P-type semiconductor and an N-type semiconductor are PN-junctioned. Aluminum or phosphorus may be used for the LED chip in the B-LED light source 14-3. Also, the B-LED light source 14-3 emits light with a wavelength of around 450 nm.

The camera 22 is provided on the moving body 20a and mainly captures an image in the traveling direction of the moving body 20a. For example, the moving body 20a analyzes an image captured by the camera 22, recognizes obstacles, etc., and moves while avoiding the obstacles. The camera may be a visible light camera or an infrared camera.

The tag reader 23 is provided in the moving body 20a and reads information from the wireless tag 40. FIG. The tag reader 23 has an antenna and transmits radio waves or magnetic fields to the wireless tag 40 via the antenna. Then, the radio wave or magnetic field returned by the wireless tag 40 is received via the antenna. A control circuit provided in the tag reader 23 extracts information from the radio wave or magnetic field received from the wireless tag 40 .

The wireless tag 40 is a tag that uses radio waves or electromagnetic waves to contactlessly transmit or receive (receive and rewrite) data stored in a built-in memory. The wireless tag 40 has an antenna, a control circuit, and a memory. The wireless tag 40 receives radio waves or magnetic fields transmitted from the tag reader 23 via an antenna.

When the wireless tag 40 receives radio waves, rectification generates power in the wireless tag 40, and the wireless tag 40 uses the generated power to operate the control circuit and memory to perform information processing. When the wireless tag 40 receives a magnetic field, power is generated in the wireless tag 40 due to resonance, and the wireless tag 40 uses the generated power to operate the control circuit and memory to perform information processing.

Then, the wireless tag 40 transmits the data stored in the memory to the tag reader 23 via the antenna on radio waves or magnetic fields. The wireless tag 40 may store, for example, location information of the location where the wireless tag 40 is embedded in a memory.

[Outline of operation of lighting device]
Next, an overview of the operation of the lighting device 10a according to the second embodiment will be described. The mobile object 20a reads, for example, wireless tags 40 (for example, NFC tags) embedded in the floor at regular intervals while moving, and reads wireless signals including position information transmitted by the wireless tags 40 . Then, the moving body 20a moves while comparing the position information read from the wireless tag 40 with the position information stored in advance by itself.

Further, the moving object 20a transmits a signal containing the ID or address information of the lighting device 10a corresponding to the position information read from the wireless tag 40 to the lighting device 10a. Here, the signal may be of a radio wave type. When the lighting device 10a receives the signal transmitted from the moving body 20a, if the ID or address information of the lighting device 10a included in the signal transmitted from the moving body 20a matches its own ID or address information, , the light emission mode of the light source 14 is changed, or the lighting holding time is changed. It should be noted that the light emission mode is the dimming rate, color toning, flashing state, and the like of the light source 14 .

Specifically, upon receiving the signal transmitted from the moving body 20a, the lighting device 10a combines the ID or address information of the lighting device 10a included in the signal transmitted from the moving body 20a with its own ID or address information. match, the light source 14 may be brightly lit. Alternatively, when the lighting device 10a receives the signal transmitted from the moving body 20a, the ID or address information of the lighting device 10a included in the signal transmitted from the moving body 20a matches its own ID or address information. In this case, the lighting holding time of the light source 14 may be extended.

Alternatively, when the receiving unit 15 receives a signal from the moving object 20a, the control unit 12 may cause the lighting circuit unit 11 to light the R-LED light source 14-1. Further, when the human detection sensor 13 detects the human body 30 while the control unit 12 causes the lighting circuit unit 11 to light the R-LED light source 14-1, the control unit 12 causes the lighting circuit unit 11 to turn on the R-LED light source 14-1. , the R-LED light source 14-1, the G-LED light source 14-2, and the B-LED light source 14-3 may all be turned on.

Alternatively, when the human detection sensor 13 detects the human body 30, the control unit 12 causes the lighting circuit unit 11 to detect the R-LED light source 14-1, the G-LED light source 14-2, and the B-LED light source 14-3. all three may be illuminated.

FIG. 8 is a sequence diagram when the position is acquired from the wireless tag of the lighting device 10a according to the second embodiment.

First, the moving object 20a acquires a position from the wireless tag 40 (step S300). The moving object 20 moves by itself, reads the wireless tag 40 embedded in the floor or the like using the tag reader 23 , and acquires the position information stored in the wireless tag 40 .

Next, the moving body 20a identifies the ID of the lighting device 10a (step S301). The moving object 20a identifies the ID of the illumination device 10a corresponding to the position information acquired from the wireless tag 40. FIG. For example, the moving object 20a holds a list in which the ID of the lighting device 10a and the position information where the lighting device 10a exists correspond to each other. The ID of the lighting device 10a may be specified.

Subsequently, the moving body 20a transmits a signal including the identified ID of the lighting device 10a (step S302). The moving object 20a generates a signal containing information about the ID of the lighting device 10a specified in step S21, and transmits the signal to the lighting device 10a.

Next, lighting device 10a emits light for a certain period of time (step S303). When receiving a signal from the moving body 20a, the illumination device 10a emits light for a certain period of time when the ID of the illumination device 10a included in the signal matches its own ID. Here, the certain period of time is, for example, T2 described with reference to FIG. Alternatively, if a predetermined condition is satisfied, the certain period of time may be T1 described with reference to FIG. Note that the predetermined condition may be, for example, a case where a signal is received from the moving object 20a while a signal is received from the human detection sensor and light is emitted for a predetermined period of time.

In addition, the moving body 20a may have a visible light communication function for receiving a light signal emitted by the lighting device 10a by switching the dimming level of the light source 14 at high speed and performing visible light communication with the lighting device 10a. good. In this case, the moving object 20a does not acquire position information from the wireless tag 40 embedded in the floor or the like, but acquires position information from address information or the like repeatedly transmitted by the lighting device 10a by visible light communication.

FIG. 9 is a sequence diagram when a position is acquired by visible light communication of lighting device 10a according to the second embodiment.

First, the illumination device 10a performs visible light communication (step S400). The illumination device 10a switches the dimming level of the light source 14 at high speed to transmit an optical signal including its own address information. Alternatively, the illumination device 10a may transmit an optical signal including its own address information by blinking the light source 14 at high speed.

Next, the moving object 20a acquires a position by visible light communication (step S401). The moving object 20a photographs the illumination device 10a with the camera 22, detects blinking of the illumination device 10a or changes in the dimming level, and interprets the light signal. The moving object 20a acquires the position information from the address information of the lighting device 10a included in the optical signal.

Next, the moving body 20a identifies the ID of the lighting device 10a (step S402). The moving object 20a identifies the ID of the illumination device 10a corresponding to the positional information acquired by the visible light communication. For example, the moving object 20a holds a list in which the ID of the lighting device 10a and the position information where the lighting device 10a exists correspond to each other. The ID of the lighting device 10a may be specified.

Subsequently, the moving body 20a transmits a signal including the identified ID of the lighting device 10a (step S403). The moving object 20a generates a signal containing information about the ID of the lighting device 10a specified in step S21, and transmits the signal to the lighting device 10a.

Next, lighting device 10a emits light for a certain period of time (step S404). When receiving a signal from the moving body 20a, the illumination device 10a emits light for a certain period of time when the ID of the illumination device 10a included in the signal matches its own ID. Here, the certain period of time is, for example, T2 described with reference to FIG. Alternatively, if a predetermined condition is satisfied, the certain period of time may be T1 described with reference to FIG. Note that the predetermined condition may be, for example, a case where a signal is received from the moving object 20a while a signal is received from the human detection sensor and light is emitted for a predetermined period of time.

(Embodiment 3)
In the third embodiment, the human detection sensor 13 of the illumination device 10 of the first embodiment is a radio wave Doppler sensor using the Doppler effect. The operation of the illumination device 10 according to Embodiment 3 will be described below. The Doppler sensor can detect both the human body 30 and the moving body 20 regardless of their temperature. Therefore, it is determined whether or not the moving body 20 exists based on the detection by the human detection sensor 13 and the reception of the signal from the moving body 20 by the receiving unit 15 within a predetermined time. control and lighting retention time. In the above determination, the order of the detection by the human detection sensor 13 and the reception of the signal from the moving body 20 by the reception unit 15 within the predetermined time does not matter. FIG. 10 is a flow chart showing the operation of the lighting device according to the third embodiment.

First, the controller 12 determines whether or not the receiver 15 has received a signal (step S500). The control unit 12 determines whether or not the reception unit 15 included in the lighting device 10 has received the signal transmitted from the signal transmission unit 21 of the moving object 20 . Here, the signal is, for example, an infrared remote control signal with a central wavelength of 900 nm or more and 950 nm or less. Alternatively, the signal may be a radio signal.

When the control unit 12 determines that the receiving unit 15 has received the signal (Yes in step S500), the control unit 12 determines that the lighting device 10 has detected the moving object 20 (step S501). That is, the control unit 12 determines that the moving object 20 exists at a predetermined distance from the lighting device 10 .

Subsequently, the control unit 12 causes the lighting circuit unit 11 to cause the light source 14 to emit light for the moving body 20 (step S503). That is, the control unit 12 causes the lighting circuit unit 11 to cause the light source 14 to emit light for the time determined to cause the light source 14 to emit light when the moving object 20 is detected. Alternatively, in this case, the control section 12 may cause the lighting circuit section 11 to light the R-LED light source 14-1.

Further, when the human detection sensor 13 detects the human body 30 while the control unit 12 causes the lighting circuit unit 11 to light the R-LED light source 14-1, the control unit 12 causes the lighting circuit unit 11 to turn on the R-LED light source 14-1. , the R-LED light source 14-1, the G-LED light source 14-2, and the B-LED light source 14-3 may all be turned on.

When the control unit 12 determines that the receiving unit 15 has not received the signal (No in step S500), the control unit 12 determines that the lighting device 10 has detected the human body 30 (step S501). That is, the control unit 12 determines that the human body 30 exists at a predetermined distance from the lighting device 10 .

Subsequently, the control unit 12 causes the lighting circuit unit 11 to cause the light source 14 to emit light for the time for the human body 30 (step S503). That is, the control unit 12 causes the lighting circuit unit 11 to cause the light source 14 to emit light for the time determined to cause the light source 14 to emit light when the human body 30 is detected. Alternatively, in this case, the control unit 12 may cause the lighting circuit unit 11 to light all three of the R-LED light source 14-1, the G-LED light source 14-2, and the B-LED light source 14-3. .

(effects, etc.)
The lighting device 10 of the present disclosure includes a receiving unit 15 that receives a signal from a moving body 20, a human detection sensor 13 that detects the presence of a human body 30, whether or not the receiving unit 15 has received a signal, and human detection. and a control unit 12 that changes the light emission mode of the light source 14 depending on whether the sensor 13 has detected the presence of the human body 30 .

Thereby, the lighting device 10 of the present disclosure can perform appropriate lighting control for each of the person and the moving object 20 . Therefore, the lighting device 10 according to the embodiment of the present disclosure can efficiently consume power.

Further, for example, in the lighting device 10 of the present disclosure, when the receiving unit 15 receives the signal, the control unit 12 causes the light source 14 to emit light brighter than the normal state during the second period, and the human detection sensor 13 detects the human body. When the presence of 30 is detected, the light source 14 is caused to emit light brighter than normal for a first period longer than the second period.

Thereby, the lighting device 10 of the present disclosure can cause the light source to emit light for a longer period of time than when the moving object 20 is present when there is a high possibility that a person is present. Therefore, the lighting device 10 of the present disclosure can more appropriately control the light emission mode.

Further, for example, in the illumination device 10 of the present disclosure, the control unit 12 detects the human detection sensor 13 when the light source 14 emits light brighter than the normal state based on the reception of the signal by the reception unit 15. is detected, the light source 14 is caused to emit light brighter than in a normal state for a first period from the timing when the presence of the human body 30 is detected.

Thereby, the lighting device 10 of the present disclosure can cause the light source to emit light for a longer time when a person is present than when the moving object 20 is present. Therefore, the lighting device 10 of the present disclosure can more appropriately control the light emission mode.

Further, for example, in the illumination device 10 of the present disclosure, when the human detection sensor 13 detects the presence of the human body 30, the light source 14 emits white light.

With this, the lighting device 10 of the present disclosure can perform illumination with visible light that allows a person to visually recognize an object when a person is present.

Further, for example, in the illumination device 10 of the present disclosure, the light source 14 emits red light when the reception unit 15 receives the signal.

As a result, when the moving object 20 is present, the illumination device 10 of the present disclosure utilizes a wide range of wavelengths of light that can be identified by the camera of the moving object 20, and emits light of a color that consumes less energy at the time of irradiation. can be used for illumination. Therefore, the lighting device 10 of the present disclosure can reduce energy consumption during lighting.

Further, for example, in the illumination device 10 of the present disclosure, the controller 12 detects the presence of the human body 30 after the human detection sensor 13 detects the presence of the human body 30, and if the receiver 15 receives a signal within a predetermined time, the light emission time of the light source 14 is to the first period again.

As a result, even if the lighting device 10 of the present disclosure detects the moving object 20, when there is a high possibility that a person is present nearby, the lighting device 10 emits light from the light source when the moving object 20 is present. It is long and can illuminate the light source. Therefore, the lighting device 10 of the present disclosure can more appropriately control the light emission mode.

In the illumination device 10 of the present disclosure, the human detection sensor 13 can detect the moving body 20 in addition to the human body 30, and the control unit 12 controls the timing immediately before the human detection sensor 13 detects the human body 30 or the moving body 20. Alternatively, if a signal is received during the immediately following predetermined period, the light source 14 is made to emit light brighter than in the normal state during the second period.

Thereby, the illumination device 10 of the present disclosure can cause the light source 14 to emit light for a shorter time when the moving object 20 is present than when a person is present. Therefore, the lighting device 10 of the present disclosure can more appropriately control the light emission mode.

Further, for example, in the illumination device 10 of the present disclosure, the human detection sensor 13 is a heat ray sensor that detects far-infrared rays with a wavelength of 9 μm or more and 10 μm or less generated from the human body 30 .

Thereby, the illumination device 10 of the present disclosure can detect the human body 30 using a small, low power consumption, and inexpensive sensor. Therefore, the lighting device 10 of the present disclosure can achieve energy saving, cost reduction, and the like.

In the lighting device 10 of the present disclosure, the moving body 20 moves while acquiring the position information of the moving body 20, transmits a signal containing the address information of the lighting device 10 corresponding to the position information, and the receiving unit 15 , the signal transmitted by the moving object 20 is received, and the control unit 12 detects that the address information of the lighting device 10 associated with the position information included in the signal received by the receiving unit 15 matches its own address. 14 lighting modes are switched.

Thereby, the lighting device 10 of the present disclosure can switch the light emission mode of the light source 14 according to the signal including its own address information among the received signals. Thus, the lighting device 10 of the present disclosure can select the signals it wishes to receive.

Further, for example, in the illumination device 10 of the present disclosure, the signal is a near-infrared signal with a wavelength of 0.9 or more and 1 μm or less.

Thereby, the lighting device 10 of the present disclosure can detect the moving object 20 using the near-infrared light used for the infrared remote control signal. Therefore, the illumination device 10 of the present disclosure can achieve miniaturization and cost reduction.

Further, for example, the lighting device 10 of the present disclosure includes the receiving unit 15 that receives a signal from the moving body 20, the human detection sensor 13 that detects the presence of the human body 30, whether or not the receiving unit 15 has received the signal, and a light source 14 and a control unit that changes the light emission mode of the light source 14 according to whether or not the human detection sensor 13 has detected the presence of the human body 30 .

Thereby, the lighting device 10 of the present disclosure can perform appropriate lighting control for each of the person and the moving object 20 . Therefore, the lighting device 10 according to the embodiment of the present disclosure can efficiently consume power.

Further, for example, the lighting control method of the present disclosure includes a receiving step of receiving a signal from the moving body 20, a human detection step of detecting the presence of the human body 30, and whether or not a signal has been received in the receiving step, or whether or not a human and a control step of controlling the light source 14 to change the light emission mode of the light source 14 depending on whether or not the presence of the human body 30 is detected in the detection step.

Accordingly, the lighting control method of the present disclosure can perform appropriate lighting control for each of the person and the moving object 20 . Therefore, the lighting device 10 according to the embodiment of the present disclosure can efficiently consume power.

(others)
Although the embodiments have been described above, the present disclosure is not limited to the above embodiments.

For example, in the above embodiments, a process executed by a specific processing unit may be executed by another processing unit. In addition, the order of multiple processes may be changed, and multiple processes may be executed in parallel.

Also, in the above embodiments, each component may be realized by executing a software program suitable for each component. Each component may be realized by reading and executing a software program recorded in a recording medium such as a hard disk or a semiconductor memory by a program execution unit such as a CPU or processor.

Also, each component may be realized by hardware. For example, each component may be a circuit (or integrated circuit). These circuits may form one circuit as a whole, or may be separate circuits. These circuits may be general-purpose circuits or dedicated circuits.

Also, general or specific aspects of the present disclosure may be embodied in a system, apparatus, method, integrated circuit, computer program or recording medium such as a computer-readable CD-ROM. Also, general or specific aspects of the present disclosure may be implemented in any combination of systems, devices, methods, integrated circuits, computer programs and recording media.

For example, the present disclosure may be implemented as a program for causing a computer to execute the lighting control method of the above embodiments. The present disclosure may be implemented as a computer-readable non-transitory recording medium on which such programs are recorded.

In addition, forms obtained by applying various modifications to each embodiment that a person skilled in the art can think of, or realized by arbitrarily combining the components and functions of each embodiment within the scope of the present disclosure. Also included in the present disclosure is the form of

10, 10a Lighting device 11 Lighting circuit unit 12 Control unit 13 Human detection sensor 14 Light source 15 Receiving unit 20, 20a Moving object 21 Signal transmitting unit 22 Camera 23 Tag reader 30 Human body 40 Wireless tag

Claims (12)

a receiver that receives a signal from a mobile object;
a human detection sensor that detects the presence of a human body;
a control unit that changes a light emission mode of a light source according to whether the reception unit has received the signal and whether the human detection sensor has detected the presence of the human body;
lighting device. The control unit
causing the light source to emit light brighter than a predetermined state during a second period when the receiving unit receives the signal;
when the human detection sensor detects the presence of the human body, causing the light source to emit light brighter than the predetermined state for a first period longer than the second period;
The lighting device according to claim 1 . The control unit
When the human detection sensor detects the presence of the human body when the light source emits light brighter than the predetermined state based on the reception of the signal by the receiving unit, the presence of the human body is detected. causing the light source to emit light brighter than a normal state during the first period from the timing of
3. A lighting device according to claim 2. When the human detection sensor detects the presence of the human body, the light source emits white light.
The lighting device according to any one of claims 1 to 3. When the receiver receives the signal, the light source emits red light.
The illumination device according to any one of claims 1-4. When the receiving unit receives the signal within a predetermined time after the human detection sensor detects the presence of the human body, the control unit sets the light emission time of the light source to a first period longer than the second period. set it again to
The lighting device according to any one of claims 1-5. The human detection sensor is capable of detecting the moving object in addition to the human body,
When the human detection sensor receives the signal in a predetermined period immediately before or after the timing at which the human detection sensor detects the human body or the moving object, the control unit turns on the light source for a second period shorter than the first period. to emit light brighter than the specified state,
The illumination device according to any one of claims 2-6. The human detection sensor detects far infrared rays with a wavelength of 9 or more and 10 μm or less generated from the human body.
A heat ray sensor,
The lighting device according to any one of claims 1-6. the moving body moves while acquiring position information of the moving body;
transmitting the signal containing the address information of the lighting device corresponding to the position information;
The receiving unit receives the signal transmitted by the mobile,
The control unit switches the light emission mode of the light source when the address information of the lighting device associated with the position information included in the signal received by the reception unit matches its own address.
The illumination device according to any one of claims 1-8. The signal is a near-infrared signal with a wavelength of 0.9 or more and 1 μm or less,
The illumination device according to any one of claims 1-8. a lighting device according to any one of claims 1 to 10;
a light source;
lighting device. a receiving step of receiving a signal from a mobile;
a human detection step for detecting the presence of a human body;
A control step of controlling a light source to change the light emission mode of the light source according to whether or not the signal has been received in the receiving step or whether or not the presence of the human body has been detected in the human detection step. and including
lighting control method.

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