JP4915662B2 - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system capable of irradiating an irradiation object with a desired quantity of light even if a brightness sensor detects external light from a window. <P>SOLUTION: This lighting system 1 is provided with: a luminaires 4a-4c irradiating the irradiation object 3 with light; brightness sensors 6a-6c outputting detection signals according to the reception of reflection light rays 5 reflected by a room interior 2 or the irradiation object 3; and a control part 9 outputting a dimming signal controlling the quantity of the light of the luminaires 4a-4c based on the detection signals. The control part 9 identifies the brightness sensor 6c which is most hardly influenced by outside light 11 from the outside of the room interior 2, and controls the quantity of light of all the luminaires 4a-4c based on the detection signal outputted from the brightness sensor 6c. Thereby, the lighting system 1 can irradiate the irradiation object 3 with an optimum quantity of light even if the brightness sensors 6a-6c receive the outside light 11. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a lighting system including a brightness sensor and a dimmable lighting fixture.

  A conventional lighting system includes a brightness sensor that detects ambient brightness and a lighting fixture that can be dimmed by adjusting the amount of light, and the lighting fixture is turned on with the amount of light detected by the brightness sensor. Let As a result, the luminaire is not turned on with a light amount more than necessary, and wasteful power can be suppressed. Also, lighting systems that can brighten a wide area while suppressing power consumption are used in offices and factories.

  Therefore, for example, as disclosed in Patent Document 1, a configuration in which a lighting system includes one brightness sensor and a plurality of lighting fixtures is known. Moreover, as shown in Patent Document 2, a configuration in which an illumination system including a plurality of illumination fixtures is turned on by changing the amount of light for each illumination fixture is known. Further, in Patent Literature 3, a lighting system including a plurality of lighting fixtures can perform distributed control for changing the light amount for each lighting fixture and centralized control for changing the light amounts of all the lighting fixtures at once. Technology is disclosed. Furthermore, as shown in Patent Document 4, the lighting system includes a plurality of brightness sensors, a plurality of lighting fixtures, and a control unit that controls the entire system, and converts the light amount of each lighting fixture into a dimming level. In addition, a configuration is shown that further includes a lighting fixture controller that controls each lighting fixture such that the difference between the highest dimming level and the lowest dimming level is smaller than a predetermined value.

However, in the technique disclosed in Patent Document 1, there is a problem that the light intensity of all the lighting fixtures is reduced when the brightness sensor detects external light from the window. Moreover, in the technique shown by patent document 2, even if it is a case where external light is not irradiating the to-be-irradiated body which should be irradiated with a lighting fixture, a brightness sensor does not have external light from a window. Since control is performed to reduce the light amount of some of the lighting fixtures according to the detection, there has been a problem that the illumination fixture is not irradiated with the desired light amount. Further, in the technique disclosed in Patent Document 3, the illumination system is affected by external light even when the illumination system controls the luminaire by any control method of distributed control or centralized control. However, there has been a problem that the lighting apparatus is not irradiated with the desired amount of light. Furthermore, in the technique disclosed in Patent Document 4, the illumination system can suppress variations in the amount of light emitted by each lighting fixture when the brightness sensor detects external light, but the irradiated object has a desired amount of light. However, there was a problem that the lighting equipment was not irradiated. Moreover, since the illumination system shown by patent document 4 is provided with the some control part, the problem that the structure became complicated had arisen.
JP 2001-118686 A JP 2002-334794 A JP 2003-045678 A JP 2006-085934 A

  The present invention has been made to solve the above-described problem, and even when the brightness sensor detects external light from a window, the illuminating device irradiates the irradiated object with an optimal amount of light. An object of the present invention is to provide a lighting system that can be used.

  In order to achieve the above object, the invention according to claim 1 detects the reflected light from the irradiated object, and outputs a detection signal corresponding to the intensity of the detected reflected light, and irradiates the irradiated object. A detection signal is input via a lighting fixture that can be dimmed by adjusting the amount of light to be emitted and a detection signal line connected to the brightness sensor, and a dimming signal that dimmes the lighting fixture is generated based on the detection signal And a controller that controls the amount of light of the lighting fixture by outputting a dimming signal to the lighting fixture via a dimming signal line connected to the lighting fixture, and a plurality of sets of brightness sensors and lighting fixtures are provided. In each of the lighting systems in which each set constitutes a lighting system, the control unit includes a time zone determination unit that determines whether or not the time zone is set in advance. Minimum and maximum amount of light The brightness difference of the lighting system is calculated as the light intensity change width, and when it is determined by the time zone determination means that it is a predetermined time zone, the brightness sensor of the lighting system to which the lighting fixture with the smallest light intensity change width belongs is detected. Based on the detected signal, the luminaire having the largest light quantity change width is controlled.

  The invention according to claim 2 detects the reflected light from the irradiated object and outputs an analog detection signal according to the intensity of the detected reflected light, and adjusts the amount of light irradiated to the irradiated object. In a lighting system comprising dimmable lighting fixtures, a control unit for controlling the brightness sensor and the lighting fixture, a plurality of brightness sensors and lighting fixtures, each set constituting a lighting system, Connected to the brightness sensor via the detection signal line, connected to the control unit via the digital signal line, holds the brightness sensor address unique to the brightness sensor, converts the detection signal into digital detection data, and detects A detection signal conversion adapter that outputs a signal and a brightness sensor address to the control unit, and is connected to the luminaire via a dimming signal line, and connected to the control unit via a digital signal line, and is unique to the luminaire. Dimming that holds the fixture address, converts the digital dimming data generated by the control unit based on the detection data into an analog dimming signal used for dimming the lighting fixture, and outputs the dimming signal to the lighting fixture A signal conversion adapter, and the control unit further includes a time zone determination unit that determines whether or not the time zone is set in advance, and associates a brightness sensor address and a lighting fixture address for each lighting system. The difference between the minimum value and the maximum value of the amount of light emitted by the luminaire within a predetermined time for each lighting system is calculated as the light amount change width, and is determined not to be a predetermined time zone by the time zone determination means. The dimming data generated based on the detection data from the detection signal conversion adapter is output to the dimming signal conversion adapter that holds the luminaire address associated with the brightness sensor address. When it is determined by the band determination means that it is a predetermined time period, the light amount change width is the largest based on the detection signal detected by the brightness sensor of the illumination system to which the lighting apparatus having the smallest light amount change width belongs. The lighting fixture is controlled.

  According to the invention of claim 1, the control unit calculates, for each illumination system, the difference between the minimum value and the maximum value of the light amount of the lighting fixture within a predetermined time as the light amount change width, and the time zone determining means When it is determined that the predetermined time zone is reached, the lighting apparatus having the largest light quantity change width is controlled based on the detection signal detected by the brightness sensor of the lighting system to which the lighting apparatus having the smallest light quantity change width belongs. Thus, the lighting system controls the light amount of the lighting fixture based on the detection signal output by the brightness sensor that does not detect the external light even when the brightness sensor on the window side detects the external light. Therefore, it is possible to avoid a decrease in illuminance of the window-side lighting fixture.

  According to invention of Claim 2, a lighting system hold | maintains the brightness | luminance sensor address connected via the control part and the digital signal wire | line, the detection signal conversion adapter which converts a detection signal into a digital signal, and a lighting fixture address And a dimming signal conversion adapter for converting a digital signal into a dimming signal. As a result, the lighting system can reduce the number of wires by using digital signal lines as compared to the case of using analog signal lines, so that the wiring work can be easily performed. In addition, the control unit calculates the light amount change width of the luminaire within a predetermined time, and when the time zone determination unit determines that it is a predetermined time zone, the illumination to which the luminaire having the smallest light amount change width belongs. Based on the detection signal detected by the system brightness sensor, the lighting apparatus having the largest light quantity change width is controlled. Thereby, the illumination system can avoid the illumination intensity fall of the lighting fixture by the side of the window which receives the influence of external light.

  Hereinafter, illumination systems according to first and second embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of an illumination system according to the first embodiment. The lighting system 1 includes lighting fixtures 4 a to 4 c that are attached to a ceiling portion of the room 2 and irradiate light to the irradiated body 3 installed in the indoor 2, and reflection reflected by the room 2 and the irradiated body 3. The brightness sensor 6a to the brightness sensor 6c that outputs a detection signal that is an analog signal in response to receiving the light 5, and the brightness sensor 6a to the brightness sensor 6c and the detection signal line 7a to the detection signal line 7c. Connected to the lighting fixtures 4a to 4c via the dimming signal lines 8a to 8c, and a control unit 9 for controlling the entire lighting system 1. Here, the reflected light 5 is irradiated by the external light 11 or the lighting fixtures 4a to 4c incident from the wall 10 or the floor of the room 2 or the window 10 attached to the room 2 reflected by the irradiated body 3. It is light to do. The irradiated body 3 is a desk or a shelf.

  The lighting fixture 4a, the brightness sensor 6a, the detection signal line 7a, and the dimming signal line 8a constitute the lighting system S1, and the lighting fixture 4b, the brightness sensor 6b, the detection signal line 7b, and the dimming signal line 8b are the lighting system S2. The lighting fixture 4c, the brightness sensor 6c, the detection signal line 7c, and the dimming signal line 8c constitute an illumination system S3. The control unit 9 includes a time zone determination unit 12 that determines whether or not it is a preset time zone. The preset time zone is a time zone set by the user or based on weather information, for example, a time zone in which the outside light 11 enters the room 2 from the window 10. Here, the brightness sensor 6a and the brightness sensor 6b receive the reflected light 5 of the external light 11, and the brightness sensor 6a receives more reflected light 5 than the brightness sensor 6b. . Further, it is assumed that the brightness sensor 6c does not receive the reflected light 5 of the outside light 11.

  Next, the operation of the illumination system 1 will be described. The illumination system 1 changes the operation according to the determination content of the time zone determination means 12. First, the case where the time zone determination means 12 determines that it is not a preset time zone will be described. The control unit 9 performs independent control for each of the illumination systems S1 to S3. In the illumination system S1, the brightness sensor 6a outputs a detection signal corresponding to the amount of received reflected light 5 to the control unit 9 via the detection signal line 7a. Based on the input detection signal, the controller 9 outputs a dimming signal for determining the amount of light emitted by the lighting fixture 4a to the lighting fixture 4a via the dimming signal line 8a. The luminaire 4a irradiates the irradiated body 3 with a light amount corresponding to the input dimming signal.

  Here, when the brightness sensor 6a receives a large amount of reflected light 5, the control unit 9 determines that the illuminating device 4a is irradiating the irradiated body 3 with an amount of light more than necessary, and the illuminating device A dimming signal for decreasing the amount of light 4a is output. On the other hand, when the brightness sensor 6a hardly receives the reflected light 5 or receives no reflected light 5, the controller 9 irradiates the irradiated object 3 with a sufficient amount of light. It judges that it is not, and outputs the light control signal which raises the light quantity of the lighting fixture 4a. Also in the illumination system S2 and the illumination system S3, the control unit 9 performs the same control as in the illumination system S1, thereby changing the amount of light emitted by the illumination fixtures 4a to 4c. The control unit 9 controls the illumination system S1 to the illumination system S3, and sets the difference between the minimum value and the maximum value of the light amount irradiated by the respective illumination fixtures 4a to 4c within a predetermined time as the light amount change width. Calculated. Thereby, since the illumination system 1 can always irradiate the to-be-irradiated body 3 with the optimal light quantity, it becomes possible to save illumination power.

  Next, a case where the time zone determination unit 12 determines that it is a preset time zone will be described. The control unit 9 compares the light amount change width calculated for each of the lighting fixtures 4a to 4c to identify the lighting fixture with the largest light amount change width and the lighting fixture with the smallest light amount change width. In FIG. 1, it is assumed that the light amount change width of the lighting fixture 4a is the largest and the light amount change width of the lighting fixture 4c is the smallest. The control unit 9 determines that the light amount change width of the luminaire 4a is the largest because the brightness sensor 6a receives the reflected light 5 from the external light 11 or directly receives the external light 11. . On the other hand, since the brightness sensor 6a is hardly affected by the external light 11 or not influenced by the external light 11 at all, the control unit 9 determines that the light amount change width of the lighting fixture 4c is the smallest. .

  Here, since the brightness sensor 6a is affected by the external light 11, the luminaire 4a irradiates the irradiated body 3 with a light amount smaller than the optimum light amount. On the other hand, since the brightness sensor 6c is not influenced by the external light 11, the lighting fixture 4c irradiates the irradiated body 3 with an optimal light amount. Therefore, the control unit 9 does not perform independent control for each of the illumination systems S1 to S3, and the detection is output from the brightness sensor 6c belonging to the illumination system S3 that irradiates the irradiated body 3 with the optimal light amount. All the lighting fixtures 4a to 4c are controlled based on the signal. Therefore, the lighting fixture 4a and the lighting fixture 4b irradiate the irradiated body 3 with the same light amount as the lighting fixture 4c. As a result, the illumination system 1 is configured so that even when all or part of the brightness sensor 6a to the brightness sensor 6c is affected by the external light 11, the optimum light amount is the same as the optimum light amount. The irradiation body 3 can be irradiated.

  FIG. 2 shows a schematic configuration of the illumination system 1 according to the second embodiment of the present invention. Here, different configurations of the illumination system 1 according to the present embodiment and the illumination system 1 according to the first embodiment will be described. The illumination system 1 is connected to the brightness sensor 6a to the brightness sensor 6c via the detection signal line 7a to the detection signal line 7c, and connected to the control unit 9 via the digital signal line 13 to the detection signal conversion adapters 14a to 14a. Dimming signal conversion connected to the detection signal conversion adapter 14c, the lighting fixtures 4a to 4c via the dimming signal lines 8a to 8c, and the control unit 9 via the digital signal line 13 An adapter 15a to a dimming signal conversion adapter 15c are provided. The lighting fixture 4a, the brightness sensor 6a, the detection signal line 7a, the dimming signal line 8a, the detection signal conversion adapter 14a, and the dimming signal conversion adapter 15a constitute the lighting system S1, and the lighting fixture 4b, the brightness sensor 6b, The detection signal line 7b, the dimming signal line 8b, the detection signal conversion adapter 14b, and the dimming signal conversion adapter 15b constitute an illumination system S2, and include a lighting fixture 4c, a brightness sensor 6c, a detection signal line 7c, and a dimming signal line. 8c, the detection signal conversion adapter 14c, and the dimming signal conversion adapter 15c constitute an illumination system S3.

  FIG. 3 shows a schematic configuration of the detection signal conversion adapter 14a and the dimming signal conversion adapter 15a according to the present embodiment. The detection signal conversion adapter 14a has a remote control unit 141 to which an address unique to the detection signal conversion adapter 14a is input by a remote controller, a storage unit 142 that stores the input address, and a detection signal that is an analog signal from the brightness sensor 6a. An input detection signal input unit 143, a conversion control unit 144 that converts the detection signal into detection data that is a digital signal, and an address stored in the detection data and the storage unit 142 are connected via the digital signal line 13 to the control unit 9. The communication control part 145 which transmits to is provided. Based on the detection data received from the detection signal conversion adapter 14a, the control unit 9 generates dimming data, which is a digital signal used to determine the amount of light of the lighting fixture 4a, and sends it to the dimming signal conversion adapter 15a. Send.

  The dimming signal conversion adapter 15a receives the dimming data from the remote control unit 151 to which an address unique to the dimming signal conversion adapter 15a is input by the remote controller, the storage unit 152 that stores the input address, and the control unit 9. The communication control part 155, the conversion control part 154 which converts the received light control data into the light control signal which is an analog signal, and the light control signal output part 153 which outputs a light control signal to the lighting fixture 4a are provided. Here, the address specific to the detection signal conversion adapter 14a and the address specific to the dimming signal conversion adapter 15a are associated one-to-one, and these addresses are, for example, IP addresses. Further, the detection signal conversion adapter 14a and the dimming signal conversion adapter 15a use the same device although the addresses and various settings are different.

  Next, the operation of the illumination system S1 when the time zone determination unit 12 determines that it is not a preset time zone will be described. When the detection signal is input from the brightness sensor 6a to the detection signal input unit 143, the conversion control unit 144 converts the detection signal that is an analog signal into detection data that is a digital signal. The communication control unit 145 transmits the detection data and the address stored in the storage unit 142 to the control unit 9. The control unit 9 generates dimming data based on the received detection data. Next, the control unit 9 specifies an address specific to the dimming signal conversion adapter 15a from the address specific to the detection signal conversion adapter 14a received together with the detection data. Next, the control unit 9 transmits the dimming data generated to the dimming signal conversion adapter 15a that stores the address unique to the specified dimming signal conversion adapter 15a.

  When the communication control unit 155 receives the light control data, the conversion control unit 154 converts the light control data that is a digital signal into a light control signal that is an analog signal. The dimming signal output unit 153 outputs the dimming signal to the lighting fixture 4a. The luminaire 4a irradiates the irradiated object 3 with a light amount corresponding to the dimming signal input from the dimming signal conversion adapter 15a. Here, the illumination system S2 and the illumination system S3 have the same configuration as the illumination system S1.

  Next, returning to FIG. 2, the operation of the illumination system 1 when the time zone determination unit 12 determines that it is a preset time zone will be described. As in the first embodiment, the control unit 9 compares the light amount change width calculated for each of the lighting fixtures 4a to 4c, so that the lighting fixture with the largest light amount change width and the illumination with the smallest light amount change width are compared. Identify equipment. In FIG. 2, it is assumed that the light amount change width of the lighting fixture 4a is the largest and the light amount change width of the lighting fixture 4c is the smallest. Since the illumination sensor 4a is affected by the external light 11, the illumination fixture 4a irradiates the irradiated body 3 with a light amount less than the optimum light amount. 11, it is assumed that the irradiated object 3 is irradiated with an optimal light amount.

  The control unit 9 does not perform independent control for each of the illumination systems S1 to S3, and outputs a detection signal output by the brightness sensor 6c belonging to the illumination system S3 that irradiates the irradiated body 3 with an optimal amount of light. Based on this, all the lighting fixtures 4a to 4c are controlled. Therefore, the lighting fixture 4a and the lighting fixture 4b irradiate the irradiated body 3 with the same light amount as the lighting fixture 4c. As a result, the illumination system 1 is configured so that even when all or part of the brightness sensor 6a to the brightness sensor 6c is affected by the external light 11, the optimum light amount is the same as the optimum light amount. The irradiation body 3 can be irradiated. Further, the illumination system S1 to the illumination system S3 and the control unit 9 are connected by the digital signal line 13, so that the illumination system S1 to the illumination system S3 and the control unit 9 are connected by an analog signal line. And a simple wiring structure. Further, the detection signal conversion adapter 14a to the detection signal conversion adapter 14c and the dimming signal conversion adapter 15a to the dimming signal conversion adapter 15c are configured by the same widely used device, thereby preparing a device unique to the lighting system 1. Since it becomes unnecessary, the manufacturing cost of the illumination system 1 can be reduced.

  Thus, in the first and second embodiments, the illumination system 1 outputs the brightness sensor belonging to the illumination system that is least affected by the external light 11 among the illumination systems S1 to S3. The irradiated body 3 can be irradiated with an optimum light amount by controlling the light amounts of all the lighting fixtures 4a to 4c based on the detection signal. In the second embodiment, the illumination system 1 includes a detection signal conversion adapter 14a to a detection signal conversion adapter 14c and a dimming signal conversion adapter 15a to a dimming signal conversion adapter 15c configured by the same widely used device. Since it can be set as a simple wiring structure by providing, manufacturing cost and installation cost can be reduced.

  The present invention is not limited to the configuration of the above embodiment, and various modifications are possible. In the first to second embodiments, the illumination systems S1 to S3 are attached to the ceiling portion of the room 2. Not composition. It may be configured to be installed on the wall surface or floor surface of the room 2. Moreover, in 2nd Embodiment, the illumination system 1 is not the structure provided with the detection signal conversion adapter 14a and the light control signal conversion adapter 15a separately, for example, but the detection signal conversion adapter 14a and the light control signal conversion adapter 15a. You may be the structure provided with the conversion adapter provided with the function.

The block diagram which shows the outline of the illumination system which concerns on the 1st Embodiment of this invention. The block diagram which shows the outline of the illumination system which concerns on the 2nd Embodiment of this invention. The block diagram which shows the outline of the detection signal conversion adapter and dimming signal conversion adapter which concern on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lighting system 4a Lighting fixture 4b Lighting fixture 4c Lighting fixture 5 Reflected light 6a Brightness sensor 6b Brightness sensor 6c Brightness sensor 9 Control part 12 Time determination means 13 Digital signal line 14a Detection signal conversion adapter 14b Detection signal conversion adapter 14c Detection Signal conversion adapter 15a Dimming signal conversion adapter 15b Dimming signal conversion adapter 15c Dimming signal conversion adapter S1 Illumination system S2 Illumination system S3 Illumination system

Claims (2)

A brightness sensor that detects reflected light from the irradiated body and outputs a detection signal according to the intensity of the detected reflected light;
A lighting fixture capable of dimming by adjusting the amount of light irradiated to the irradiated body;
The detection signal is input via a detection signal line connected to the brightness sensor, a dimming signal for dimming the lighting fixture is generated based on the detection signal, and the dimming connected to the lighting fixture A controller that controls the amount of light of the lighting fixture by outputting the dimming signal to the lighting fixture via a signal line, and
In the illumination system in which the brightness sensor and the luminaire have a plurality of sets, and each set constitutes an illumination system,
The control unit includes a time zone determination unit that determines whether or not a preset time zone, and for each illumination system, a minimum value and a maximum value of the amount of light emitted by the luminaire within a predetermined time, And the brightness of the lighting system to which the luminaire having the smallest light amount change width belongs when the time zone determining means determines that the time zone is a predetermined time zone. An illumination system that controls the luminaire having the largest light quantity change width based on the detection signal detected by a sensor. A brightness sensor that detects reflected light from the irradiated object and outputs an analog detection signal according to the intensity of the detected reflected light;
A lighting fixture capable of dimming by adjusting the amount of light irradiated to the irradiated body;
A control unit for controlling the brightness sensor and the lighting fixture;
In the illumination system in which the brightness sensor and the luminaire have a plurality of sets, and each set constitutes an illumination system,
Connected to the brightness sensor via a detection signal line, connected to the control unit via a digital signal line, holds a brightness sensor address unique to the brightness sensor, and converts the detection signal into digital detection data. A detection signal conversion adapter that converts and outputs the detection signal and the brightness sensor address to the control unit;
Connected to the lighting device via a dimming signal line, connected to the control unit via the digital signal line, holds a lighting device address unique to the lighting device, and the control unit is based on the detection data. A dimming signal conversion adapter that converts digital dimming data to be generated into an analog dimming signal used for dimming the lighting fixture, and outputs the dimming signal to the lighting fixture;
The control unit further includes a time zone determination unit that determines whether or not it is a preset time zone, and stores the brightness sensor address and the lighting fixture address for each lighting system in association with each other, The difference between the minimum value and the maximum value of the amount of light emitted by the lighting fixture within a predetermined time for each lighting system is calculated as a light amount change width,
When it is determined by the time zone determination means that it is not a predetermined time zone,
The dimming data generated based on the detection data from the detection signal conversion adapter is output to the dimming signal conversion adapter that holds a lighting fixture address associated with the brightness sensor address,
When it is determined by the time zone determination means that it is a predetermined time zone,
The lighting system having the largest light quantity change width is controlled based on the detection signal detected by the brightness sensor of the lighting system to which the lighting equipment having the smallest light quantity change width belongs. .

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