JP2009110818A - Luminaire and lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform visible light communication when there is a person, and do not carry out visible light communication when there is no person. <P>SOLUTION: A lighting system includes: a light source 11 which performs light irradiation by receiving power supply and carries out visible light communication; a human sensor 12 of which detection range is established in the same range as the communication range of the visible light communication by the light source 11; a visible light communication part 15 which carries out visible light communication by the light source 11 when the human sensor 12 detects a person; and an apparatus body 10a on which the light source 11, the visible light communication part 15, and the human sensor 12 are arranged. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lighting device provided with a human sensor and a lighting system configured using the lighting device.

  Conventionally, a lighting fixture provided with a human sensor is known, and according to this lighting fixture, lighting is turned on only when the human sensor detects a person to save energy (see Patent Document 1). ).

  However, since lighting fixtures are basically installed at desired positions from the beginning of building construction, if fixtures such as partitions are installed as the building is used, the blind areas of human sensors are generated by the fixtures. The lighting may not light even if there is a person behind the fixture. In such a case, since the illumination area and the detection area of the human sensor do not always coincide with each other, it may not be possible to perform appropriate lighting control by the human sensor.

  In recent years, lighting fixtures having a visible light communication function using light from a light source of the lighting fixtures have appeared, and communication can be performed in almost the illumination range of the lighting fixtures. However, the conventional lighting fixture having the visible light communication function does not determine whether or not there is a person in a range where visible light communication is possible, and wastes energy.

  In addition to the above problems, for example, in a venue with a large floor, in an environment where there are a plurality of signal transmission devices that transmit signals using visible light communication, it is necessary to ensure proper signal reception. . Therefore, a receiving apparatus including a plurality of light receiving units has been proposed (see Patent Document 2).

  However, even in the above-described receiving device including a plurality of light receiving units, there are a plurality of transmitting devices that transmit visible light communication signals, and it is not possible to cope with interference, and signals cannot be received separately. It was.

  Furthermore, a system for transmitting a plurality of pieces of content information to each lighting fixture has been proposed so that visible light information having different contents is transmitted from the plurality of lighting fixtures (see Patent Document 3). According to this, it is possible to transmit different information from each lighting fixture by visible light communication.

However, when the number of lighting fixtures increases, communication traffic between the transmitting device that transmits information and the lighting fixtures increases, and in some cases, it is expected that necessary information cannot be transmitted to the lighting fixtures.
JP 2007-35382 A JP 2007-135144 A JP 2006-50528 A

  The present invention has been made in view of the problems of the lighting equipment having the visible light communication function as described above, and an object thereof is to perform visible light communication when a person is present in a visible light communication range. It is providing the lighting fixture which can do. The present invention also provides an illumination system that enables appropriate visible light communication using such an illumination fixture.

  The luminaire according to the present invention is a light source that receives light supply and performs light irradiation and performs visible light communication; and a human sensor having a detection range set in the same range as the visible light communication range by the light source And a visible light communication unit that performs visible light communication from the light source when the human sensor detects a person; and an instrument body on which the light source visible light communication unit and the human sensor are disposed. Features.

  The light source allows lamps and LED light sources capable of visible light communication. In order to make the communication range of visible light communication and the detection range of the human sensor the same range, the position of the light source and the position of the human sensor are examined by trial and error in the device body. When the reflector is provided, the shape and the reflection direction are changed so that the visible light communication range and the detection range of the human sensor are the same range. When the entire lighting fixture has a configuration of irradiating light like a spotlight, it is preferable when the communication range of visible light communication and the detection range of the human sensor are the same range.

  The communication range of visible light communication does not necessarily need to coincide with the irradiation range of the light source, and an area where a slight amount of light from the light source is irradiated can be a non-communication range. The human sensor allows various types such as an infrared detection method and an optical method.

  A lighting system according to the present invention includes a plurality of lighting fixtures according to claim 1; human motion monitoring means for monitoring a detection signal from a human motion sensor; and when the human motion monitoring means receives the detection signal. A central control device comprising: an information transmission control means for transmitting information to be communicated by visible light communication to the luminaire that has output the detection signal; and the visible light communication unit is connected to the information transmission control means. Visible light communication is performed based on the transmitted information.

  In the lighting system according to the present invention, based on the identification information of a plurality of lighting fixtures indicating that the central control device is in the interference range in visible light communication, the central control device performs visible light communication on the lighting fixtures corresponding to these identification information. Visible light communication control means for performing control to change the communicable period is provided.

  The identification information of a plurality of lighting fixtures indicating that they are in the interference range may be provided in advance or may be acquired in the case of system operation. In the control for changing the communication possible period of visible light communication, different communication possible periods can be given to some groups. It is preferable to provide a switching period in which communication by all groups is not performed between different communication possible periods.

  In the illumination system according to the present invention, the central control unit includes a human monitoring unit that monitors a detection signal from the human sensor, and the human monitoring unit that receives detection signals from a plurality of human sensors at the same time. Identification information management means for associating corresponding identification information of the luminaire as identification information of the luminaire in the interference range, and the visible light communication control means is based on the identification information associated by the identification information management means, Control is performed to change the communication possible period of visible light communication.

  According to the lighting apparatus according to the present invention, visible light communication can be performed according to the presence of a person. Furthermore, since the luminaire according to the present invention includes a human sensor having a detection range set in the same range as the visible light communication range, the signal can be received by the visible light communication receiver. Alternatively, the detection range of the human sensor can be easily made obvious by searching for a range where reception is impossible. For this reason, if necessary, it is possible to improve the lighting environment such as eliminating the dead zone by adding a human sensor, a visible light communication unit, or a lighting fixture.

  A lighting system according to the present invention includes a plurality of lighting fixtures according to claim 1, and a human monitoring unit that monitors a detection signal from a human sensor, and the human monitoring unit receives the detection signal. And a central control unit including information transmission control means for transmitting information communicated by visible light communication to the luminaire that has output the detection signal, and the visible light communication unit includes information transmission control means. Visible light communication is performed based on information transmitted from the network, so that information for visible light communication is not transmitted to lighting fixtures that do not have people in the visible light communication range, and communication traffic increases due to wasted communication. Can be prevented.

  In the lighting system according to the present invention, based on the identification information of a plurality of lighting fixtures indicating that the central control device is in the interference range in visible light communication, the central control device performs visible light communication on the lighting fixtures corresponding to these identification information. Since the visible light communication control means for performing control to change the communicable period is provided, it is possible to prevent crosstalk and perform appropriate communication without overlapping the communicable periods of visible light communication by the lighting devices in the interference range.

  In the lighting system according to the present invention, the central control unit includes a human monitoring unit that monitors a detection signal from a human sensor, and the human monitoring unit that obtains detection signals from a plurality of human sensors at the same time. Identification information management means for associating corresponding identification information of the luminaire as identification information of the luminaire in the interference range, and the visible light communication control means is based on the identification information associated by the identification information management means, Since control is performed to change the visible light communication period, the interference range is detected in view of the fact that the visible light communication range and the human sensor detection range are the same range, and the visible light communication possible period Control without overlapping is possible.

  Embodiments of a lighting fixture and a lighting system according to the present invention will be described below with reference to the accompanying drawings. In each figure, the same components are denoted by the same reference numerals, and redundant description is omitted. The block diagram of the Example which concerns on a lighting fixture is shown by FIG. The lighting fixture 10 includes a light source 11, a human sensor 12, a lighting control unit 13, a power supply unit 14, a control unit 16, and a transmission / reception unit 17 in a fixture main body 10 a.

  An illumination control unit 13 is connected to the light source 11, and a power supply unit 14 is connected to the illumination control unit 13. The power supply unit 14 is supplied with a voltage of 100 V from, for example, a commercial AC power supply, and supplies it to the illumination control unit 13 and each unit by converting the voltage into a DC as necessary.

  The illumination control unit 13 performs illumination control such as turning on / off the light source 11 using the power supplied from the power supply unit 14. The illumination control unit 13 includes a visible light communication unit 15. The visible light communication unit 15 obtains a signal modulated by data to be transmitted by incoming visible light communication, and drives the light source 11 based on this signal. Then, a visible light communication signal is transmitted from the light source.

  The human sensor 12 and the visible light communication unit 15 are connected to the control unit 16, and the control unit 16 is connected to the transmission / reception unit 17. The transmission / reception unit 17 is connected to the central control device 30 via the transmission line 31. The central control device 30 transmits data to be transmitted by visible light communication as a signal together with identification information of the lighting fixture. This data and the identification information of the lighting fixture 10 are converted into data by the transmission / reception unit 17 and sent to the control unit 16. The control unit 16 detects that the identification information matches that of the luminaire 10, and sends data to the visible light communication unit 15 when it matches. The operation of the visible light communication unit 15 receiving this data is as described above.

  The detection signal of the human sensor 12 is taken into the control unit 16, and when the detection signal is changed, the control unit 16 transmits the state information (human detection or unattended detection) together with the identification information of the lighting fixture 10 to the central control device 30. While notifying, state information is sent to the illumination control part 13 and corresponding illumination control is performed. That is, the illumination control unit 13 controls on / off of the light source 11 according to the state information (human detection or unattended detection). In addition, you may make it the central control apparatus 30 send the identification information of the lighting fixture 10, and the on / off control information of a light source based on said state information.

  In this lighting fixture 10, the visible light communication range by the visible light communication unit 15 and the detection range of the human sensor 12 are set to the same range. For example, the shape and reflection direction of the reflector are set in consideration of the detection range of the human sensor 12 and the like.

  And in the lighting fixture 10, the communication range A of the visible light communication by the visible light communication part 15 and the detection range B of the human sensor 12 are set to the same range as FIG. 2 shows.

  If the fixture is arranged after the lighting fixture configured as described above is attached to the lighting of a building or the like, an insensitive range of the human sensor 12 may be formed. For example, when the partition P is arranged as shown in FIG. 3, in the lighting apparatus 10, the communication range of visible light communication (detection range of the human sensor 12) is narrowed by the partition P.

  Therefore, the manager M has a receiver R which has a receiving unit for visible light communication and notifies when a received signal is obtained by a buzzer sound, and circulates around the floor where the lighting apparatus 10 is installed. Search for an area where there is no buzzer sound. In the case of FIG. 3, there is a buzzer sound in the area ER on the right side of the partition P, but there is no buzzer sound in the area EL on the left side of the partition P.

  The light from the lighting fixture 10 does not reach the area EL on the left side of the partition P at all, and it is desirable to turn on the lighting fixture 10 when there is a person in the area EL. Therefore, an auxiliary human sensor is installed on the ceiling portion of the area EL and connected to the control unit 16 of the lighting fixture 10. As a result, it is possible to eliminate an area where lighting is not performed even though there is a person, and to realize an appropriate lighting environment.

  The search for the invisible communication area of the visible light communication described above can be performed all on the floor or room where the same type of lighting fixture as the lighting fixture 10 is installed, and measures such as installing an auxiliary human sensor can be taken. In the above description, the receiver R that has a receiving unit for visible light communication and performs notification by a buzzer sound when a reception signal is obtained is used, but instead of the notification by the buzzer sound or together with the notification by the buzzer sound. A receiver that includes a display unit and receives visible light communication information and performs a corresponding display may be used. In this case, if the lighting fixture 10 is transmitted including its own identification information and the identification information of the lighting fixture 10 is displayed, the lighting fixture 10 that is transmitting the received signal can be identified. The work of grasping the lighting environment can be performed efficiently.

FIG. 4 shows a configuration diagram of a lighting system configured to prevent an increase in communication traffic due to useless communication. The lighting fixture SA ₁ , the lighting fixture SA ₂ , the lighting fixture SA ₃ ,... Have the same configuration as the lighting fixture 10 of FIG.

  FIG. 5 shows the configuration of the central control device 30B. The central control unit 32B is provided with human monitoring means 37 and information transmission control means 39. The human monitor 37 monitors a detection signal from the human sensor. The information transmission control unit 39 transmits information to be communicated by visible light communication only to the luminaire for which the detection signal is received by the motion monitoring unit 37.

In order to perform the above processing, the information transmission control means 39 corresponds to the identification information of the lighting fixtures SA ₁ , lighting fixtures SA ₂ , lighting fixtures SA ₃ ,. 6 is stored, and whether or not a person is detected at the same time is stored, and the presence monitoring means 37 is provided with lighting fixtures SA ₁ and SA _2. , SA ₃ ,... Are reflected in the detection result table TM every time a human sensor detection signal is received. That is, when a plurality of lighting fixtures detect a person at the same time, the lighting fixtures are recognized as different groups.

The information transmission control means 39 transmits information related to visible light communication to the lighting fixtures SA ₁ , SA ₂ , SA _3, ... By, for example, processing corresponding to the flowchart shown in FIG. That is, the generation of the detection output of the human sensor is awaited (S11), and when the detection output of the human sensor is generated, the identification information of the transmission destination is taken in and the detection result table TM is created (S12).

  The information transmission control means 39 refers to the detection result table TM created in step S12, sends the identification information of the corresponding transmission destination and the corresponding information to the transmission / reception unit 33, and transmits the transmission / reception unit 33 via the transmission signal line 31. (S13). At this time, the information transmission control means 39 outputs visible light communication signals at different timings for each group according to the detection result table TM. With such processing, it is possible to prevent an increase in communication traffic due to unnecessary communication without performing unnecessary communication of transmitting information used for visible light communication to a lighting fixture in which no person is detected, and at the same time, The detected lighting fixtures output visible light communication signals at different timings.

FIG. 8 is a layout diagram of a lighting system configured by using a plurality of lighting fixtures having the same configuration as the lighting fixture 10. Data for In this system, luminaire S ₁ to S ₁₆ in the ceiling of the floor F is provided, the luminaire S ₁ to S ₁₆ is to be transmitted by visible light communication from the central control unit 30 via a signal transmission line 31 Receive.

Regarding the visible light communication range of the lighting fixtures S _{1 to} S ₁₆ , some examples are shown by circles in FIG. In the communication ranges A, C, and D, A and C and C and D cause an overlap in the communication range with the lighting devices in the column direction and the row direction in the figure, respectively, and in the communication ranges C and E, the diagonal direction in the figure The communication range with the other lighting fixtures does not overlap. Such overlapping of communication ranges is detected by the administrator using a receiver that displays the identification information of the luminaire already described. When communication ranges overlap, a problem of interference occurs.

Therefore, the central controller 30 has a configuration for avoiding interference. FIG. 9 shows the configuration of the central controller 30. That is, a central control unit 32, a transmission / reception unit 33, and a storage unit 34 are provided. The central control unit 32 includes a processor, and the storage unit 34 stores programs used by the central control unit 32 and necessary data. The transmission / reception unit 33 is used when the central control unit 32 transmits / receives data to / from the lighting fixtures S _{1 to} S ₁₆ using the transmission signal line 31.

  The central control unit 32 is provided with visible light communication control means 35 realized by a program. Based on the identification information of a plurality of lighting fixtures indicating that they are in the interference range in visible light communication, the visible light communication control means 35 sets the communication period of visible light communication different for the lighting fixtures corresponding to these identification information. Control is performed.

A table T of identification information of a plurality of luminaires indicating that there is an interference range in visible light communication is stored in the storage unit 34. The contents of the table T are shown in FIG. The identity of the luminaire S ₁ to S ₁₆ and # 0S ₁ ~ # 0S _16. As described above, based on the result of detecting the identification information of the illuminating equipment with which the administrator interferes, it is divided into the group Ga and the group Gb, and the luminaire corresponding to the identification information belonging to the group Ga and the identification belonging to the group Gb. The lighting fixtures corresponding to information are those that do not cause interference with the same group of lighting fixtures. In this example, interference can be avoided by dividing into two groups, but of course, depending on the interference mode (arrangement of lighting fixtures), there are three or more groups.

  FIG. 11 shows the lighting fixtures of group Ga by double circles, and the lighting fixtures of group Gb by double squares. Since the detection information and identification information by the human sensor are sent from the lighting fixture to the central control unit 32, the visible light communication control means 35 sends the detection signal corresponding to the presence of the person. Based on the identification information, the table T is searched to obtain group information.

  Further, the visible light communication control means 35 sends the identification information of the transmission destination together with the data for visible light communication prepared in advance corresponding to the identification information to the transmission / reception unit 33, and in the communicable period of visible light communication. Corresponding information (information indicating groups Ga and Gb) is sent to the transmission / reception unit 33.

  The transmission / reception unit 33 transmits the identification information of the transmission destination along with the transmitted data for visible light communication via the transmission signal line 31, and information corresponding to the communicable period of visible light communication for a certain time thereafter. Based on the above, a signal having a communicable period as shown in FIG. 12 is created and transmitted. In FIG. 12, the period that is ON is the communicable period. When switching the ON period in the signals in the communicable period of the group Ga and the group Gb, a switching period in which both are OFF is provided, and a margin for the occurrence of interference is taken. It is assumed that a signal of a communicable period as shown in FIG. 12 is sent as it is by baseband transmission, for example.

  In the luminaire that has received the signal of the communicable period as shown in FIG. 12, a clock corresponding to this signal is created, and the visible light communication unit 15 sends the signal from the central controller 30 using the ON period in this clock. The transmitted data is transmitted by visible light communication. Thereby, appropriate visible light communication is possible, without the interference of the signal transmitted from the lighting fixture with which the communication range of visible light communication has overlapped.

  FIG. 13 shows a configuration of a central control device 30A according to a modification. The central control unit 32A is provided with human monitoring means 37 and identification information management means 38. The human monitoring means 37 monitors a detection signal from the human sensor in the lighting fixture, and the identification information management means 38 is used when the human monitoring means 37 simultaneously receives detection signals from a plurality of human sensors. The identification information of the luminaire corresponding to the luminaire is associated as the identification information of the luminaire in the interference range, and the result is, for example, as shown in FIG. It is a temporary table. This group is initialized when a predetermined time elapses or when the luminaire is turned off. At this time, information on the lighting fixtures set in different groups is stored in the storage unit 34 of the central control device 30A. In addition, you may set so that it may not initialize between the lighting fixtures set to the different group in multiple times.

When the human sensor receives a detection signal, the control unit 16 of the luminaire 10 transmits the information with a detection time stamp when transmitting the information to the central control device 30. Since the control to the luminaire in the interference range using the table of FIG. 14 is the same as that performed using the table T of FIG. 10, the description thereof is omitted. In this method, even in the case where a human sensor 12 detects a person at the same time in a plurality of lighting fixtures having a communication range in which interference does not occur, the information is tabulated as identification information of the lighting fixtures that cause interference. For example, it is shown in interference group Gc in FIG. 14, interference groups Ga, an example of identification information # 0S ₁₆ luminaire S ₁₆ is stored that with any luminaire Gb not adjacent. Such a case is a rare case, and even if an interference group is formed in this way, the lighting control is not adversely affected. In addition, since the interference group is initialized after a predetermined time or when the lighting apparatus is turned off, visible light communication may be performed at the same time after the initialization until the human sensor detects a person at the same time.

The block diagram which shows the structure of the Example of the lighting fixture which concerns on this invention. The figure for demonstrating the relationship between the visible light communication range in the Example of the lighting fixture which concerns on this invention, and the detection range of a human sensitive sensor. The figure for demonstrating the relationship between the visible light communication range in the Example of the lighting fixture which concerns on this invention when a fixture is arrange | positioned in a room etc., and the detection range of a human sensitive sensor. The block diagram of the illumination system comprised so that the increase of the communication traffic by useless communication might not arise using the Example of the lighting fixture which concerns on this invention. The block diagram which shows the structure of the principal part in the illumination system of FIG. The figure which shows an example of the memory content of the table with which the principal part in the illumination system of FIG. 4 is equipped. The flowchart for demonstrating the processing operation in the illumination system of FIG. The block diagram of the illumination system comprised so that the interference by visible light communication may not arise using the Example of the lighting fixture which concerns on this invention. The block diagram which shows the structure of the principal part in the illumination system of FIG. The figure which shows an example of the memory content of the table with which the principal part in the illumination system of FIG. 8 is equipped. The figure which shows arrangement | positioning of the lighting fixture which makes the possible timing of visible light communication differ in the lighting system comprised so that the interference by visible light communication may not arise using the Example of the lighting fixture which concerns on this invention. The figure which shows the control which makes the possible timing of visible light communication different in the illumination system comprised so that the interference by visible light communication may not arise using the Example of the lighting fixture which concerns on this invention. The block diagram which shows the structure of the principal part in the modification of the illumination system of FIG. The figure which shows an example of the memory content of the table with which the principal part in the modification of the illumination system of FIG.

Explanation of symbols

_{10, S 1 ~S 16, SA} 1, SA 2, SA 3 luminaire 10a fixture body 11 light source 12 person presence sensor 15 the visible light communication unit 30, 30A, 30B central control unit 35 visible light communication controller 37 people feel Monitoring Means 38 Identification information management means 39 Information transmission control means

Claims (4)

A light source that receives power and irradiates light and performs visible light communication;
A human sensor having a detection range set in the same range as the visible light communication range of the light source;
A visible light communication unit that performs visible light communication with the light source when the human sensor detects a person;
An instrument body in which a light source, a visible light communication unit and a human sensor are arranged;
The lighting fixture characterized by comprising. A plurality of lighting fixtures according to claim 1;
A human monitoring unit that monitors a detection signal from the human sensor and, when the human monitoring unit receives the detection signal, transmits information communicated by visible light communication to the luminaire that has output the detection signal. A central control device comprising information transmission control means for performing;
And the visible light communication unit performs visible light communication based on information transmitted from the information transmission control means. The central control unit
Based on identification information of a plurality of luminaires indicating that they are within the interference range in visible light communication, visible light communication control is performed to control the luminaires corresponding to these identification information to have different communicable periods of visible light communication. The illumination system according to claim 2, further comprising means. In the central control unit, human monitoring means for monitoring the detection signal from the human sensor, and identification information of the lighting equipment corresponding to the human monitoring means when the human monitoring means simultaneously receives detection signals from a plurality of human sensors. And an identification information management means for associating as the identification information of the luminaire in the interference range,
The illumination system according to claim 2 or 3, wherein the visible light communication control means performs control to change the communicable period of visible light communication based on the identification information associated with the identification information management means.

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