JP2009140759A - Lighting control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an lighting control system capable of suppressing variations of light output of a plurality of lighting devices due to differences of surrounding temperature. <P>SOLUTION: The lighting control system 1 includes a plurality of luminaires 2, a temperature sensor 3 to detect the surrounding temperature of a discharge lamp 6, a control part 12 to form a dimming signal depending on an illumination control signal and to form a temperature information signal depending on the surrounding temperature of the discharge lamp 4 detected by the temperature sensor 3, a control terminal device 4 having a lighting circuit part 13 to light the discharge lamp 6 depending on the dimming signal, and the main operation board device 5 having the main control part 22 which respectively calculates the dimming ratio of the discharge lamp 6 depending on the residual control terminal device 4 and forms the illumination control signal from the dimming ratio and the temperature information signal of the discharge lamp 6 depending on one control terminal device 4 so that a light flux ratio is obtained that is equal to the light flux ratio obtained based on characteristics data of the light flux ratio against the surrounding temperature of the discharge lamp 6 memorized in a memory part 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lighting control system that controls the light output of a lighting fixture in accordance with the ambient temperature.

  It is known that the luminous flux of the discharge lamp varies depending on the ambient temperature. For example, in the all-light state, the maximum light flux is obtained in the vicinity of 20 to 25 ° C., and the light flux decreases in a low temperature range or a high temperature range. Correction of the decrease in luminous flux due to the ambient temperature has been performed. For example, a lighting control method has been proposed in which a detection unit that detects the ambient temperature is provided to change the light output according to the ambient temperature (Patent Document 1). reference.).

This prior art lighting control system detects ambient temperature with a controller attached to the wall surface of the room or inputs ambient temperature information from an ambient temperature detector appropriately installed in the room, according to the ambient temperature. The light output of the plurality of lighting devices is configured to be controlled. Therefore, it is not necessary to provide a means for detecting the ambient temperature in each of the plurality of lighting devices, the inverter device for lighting the discharge lamp can be reduced in size, and the luminous flux of the plurality of lighting devices can be easily corrected at low cost. It can be done.
JP-A-7-94288 (page 3, FIG. 2)

  However, in the illumination control system of Patent Document 1, a plurality of illumination devices are collectively controlled with a dimming signal corrected according to the ambient temperature at one location, and accordingly, according to the ambient temperature of each illumination device. It is impossible to correct the luminous flux of each lighting device. That is, when a large number of lighting devices are installed, the ambient temperature of each lighting device varies, and the light output of each lighting device may vary. As a result, there is a problem in that the brightness of each lighting device varies slightly, and luminance unevenness occurs between the installed lighting devices.

  An object of this invention is to provide the illumination control system which can suppress the dispersion | variation in the light output of the some illuminating device by the difference in ambient temperature.

  The invention of the lighting control system according to claim 1 includes a plurality of lighting fixtures provided with a discharge lamp; a temperature sensor provided in each of the lighting fixtures for detecting an ambient temperature of the discharge lamp; and a transmission line. A transmission / reception unit that receives an illumination control signal from the transmission line and transmits a temperature information signal to the transmission line; and a discharge lamp that generates a dimming signal according to the illumination control signal and is detected by the temperature sensor A control terminal device disposed in each lighting fixture, comprising: a control unit that generates a temperature information signal according to the ambient temperature of the lamp; and a lighting circuit unit that lights a discharge lamp according to the dimming signal. A storage unit that stores characteristic data of a luminous flux ratio with respect to the ambient temperature of the discharge lamp in accordance with the dimming rate of the discharge lamp, and an illumination control signal is transmitted to the control terminal device via the transmission line and the control terminal A communication unit that receives a temperature information signal from the apparatus via the transmission line, and when the communication unit receives the temperature information signal, reads out the characteristic data of the luminous flux ratio with respect to the ambient temperature of the discharge lamp from the storage unit, and The dimming rate of the discharge lamp corresponding to the remaining control terminal device so that the luminous flux ratio is equivalent to the luminous flux ratio obtained from the dimming rate of the discharge lamp corresponding to the control terminal device and the temperature information signal based on the characteristic data. And a main control panel device having a main control unit that generates an illumination control signal to which the calculated dimming rate is assigned and transmits the illumination control signal from the communication unit to the control terminal device via the transmission line. It is characterized by that.

  In the present invention and each of the following inventions, each configuration is as follows unless otherwise specified.

  The control terminal device may be disposed either inside or outside the lighting fixture. Further, the control terminal device may be one in which the lighting circuit unit is formed as a separate lighting device.

  The transmission line connects between the main operation panel device and the lighting fixture (control terminal device). The main operation panel device transmits a lighting control signal and the like through the transmission line and monitors and controls the lighting fixture. To do. Here, the main operation panel device of the present invention may be connected to a monitoring terminal device via a transmission line, and may be configured to monitor and control this monitoring terminal device. The monitoring terminal device is, for example, a transmission / reception device that receives a control signal from a wall switch device, a human sensor device, or a remote control device and outputs it to a transmission line, and a control signal for lighting a discharge lamp at a desired dimming rate. Is output.

  The illumination control signal and the dimming signal include a signal for lighting and extinguishing all light in addition to a signal for dimming and lighting the discharge lamp.

  The temperature sensor may detect, as the ambient temperature of the discharge lamp, in addition to the space temperature around the outer surface of the discharge lamp, the internal temperature of the lighting fixture, the reflector temperature, the outer surface temperature of the control terminal device, and the like.

  The control unit of the control terminal device can control the temperature information signal to be output to the transmission line periodically or in response to a request signal from the main operation panel device or when the temperature information changes. it can.

  One control terminal device is one control terminal device selected according to desired conditions among a plurality of control terminal devices arranged in the lighting fixture.

  When the characteristic data of the luminous flux ratio with respect to the ambient temperature of the discharge lamp in the dimming rate of the discharge lamp given to the illumination control signal is not stored in the storage unit, the main control unit of the main operation panel device Is obtained by reading the characteristic data of the luminous flux ratio with respect to the ambient temperature of the discharge lamp at the dimming rate closest to or at the front and rear dimming rates, and the luminous flux ratio at the ambient temperature of the discharge lamp given to the temperature information signal of one monitoring terminal device And the dimming rate of the discharge lamp corresponding to the remaining control terminal device.

  When one control terminal device is specified (selected) and the discharge lamps corresponding to the remaining control terminal devices are controlled to be turned on, the main control unit performs arithmetic processing to adjust the discharge lamp for the one control terminal device. An illumination control signal in which the light rate is not changed is output, and an illumination control signal in which the dimming rate of the discharge lamp is changed is output to the remaining control terminal devices. Thereafter, when the temperature information signal is input to the communication unit, the main control unit performs a calculation process based on the dimming rate of the discharge lamp that is not changed. That is, since the dimming rate of the discharge lamp is set by, for example, a control signal from the monitoring terminal device, the main control unit controls the lighting state of the discharge lamp with the set dimming rate. Basic.

  According to the present invention, the control terminal device outputs a temperature information signal corresponding to the ambient temperature of the discharge lamp to the main operation panel device, and the main control unit of the main operation panel device stores the discharge lamp stored in the storage unit. Corresponding to the remaining control terminal device so that the luminous flux ratio is equivalent to the luminous flux ratio at the ambient temperature of the discharge lamp given to the temperature information signal of one control terminal device based on the characteristic data of the luminous flux ratio with respect to the ambient temperature The dimming rate of the discharge lamp to be calculated is calculated, and the remaining control terminal device is controlled by the illumination control signal having the calculated dimming rate. As a result, the luminous flux of the discharge lamp that is turned on by the remaining control terminal device is substantially equal to the luminous flux of the discharge lamp that is turned on by one control terminal device. As a result, variation in the light output of the lighting fixture due to the difference in ambient temperature of the discharge lamp is suppressed.

  The lighting control system according to claim 2 is the lighting control system according to claim 1, wherein the main control unit of the main operation panel device has the highest luminous flux ratio with respect to the ambient temperature of the discharge lamp as one control terminal device. The control terminal device that is transmitting the temperature information signal is selected.

  According to the present invention, the main control unit of the main operation panel device selects the control terminal device that controls the discharge lamp that outputs the largest luminous flux as one control terminal device, and corresponds to the remaining control terminal devices. Since the remaining control terminal device is controlled by calculating the dimming rate of the discharge lamp so as to be equal to the luminous flux equivalent to the largest luminous flux, the ambient temperature can be reduced without reducing the light output of each lighting fixture. Variations in the light output of the luminaire due to the difference between the two are suppressed.

  According to a third aspect of the present invention, there is provided the lighting control system according to the first aspect, wherein the main control unit of the main operation panel device has the smallest luminous flux ratio with respect to the ambient temperature of the discharge lamp as one control terminal device. The control terminal device that is transmitting the temperature information signal is selected.

  According to the present invention, the main control unit of the main operation panel device selects the control terminal device that controls the discharge lamp that outputs the smallest luminous flux as one control terminal device, and corresponds to the remaining control terminal devices. Since the remaining control terminal device is controlled by calculating the dimming rate of the discharge lamp so as to be a luminous flux equivalent to the smallest luminous flux, the discharge lamp is connected to the discharge lamp at or near all lighting. On the other hand, variation in the light output of the lighting fixture due to the difference in ambient temperature is suppressed without applying power exceeding the rated power.

  According to the first aspect of the present invention, the luminaire is provided with the remaining control terminal device so that a luminous flux equivalent to the luminous flux from the discharge lamp of the luminaire having the one control terminal device is obtained. Because the dimming rate of the discharge lamp of the lamp is changed, it is possible to suppress variations in the light output of the lighting fixtures even if the ambient temperature of the individual lighting fixtures is different, and to suppress uneven illumination on the desk top and floor In addition, the luminance unevenness when the lighting fixtures are compared can be made substantially constant.

  According to the second aspect of the present invention, the control terminal device disposed in the luminaire having the largest luminous flux from the discharge lamp is selected as one control terminal device so that the luminous flux equivalent to the largest luminous flux can be obtained. Since the dimming rate of the discharge lamp of the lighting fixture in which the remaining control terminal device is arranged is changed, it is possible to illuminate brightly while suppressing variations in the light output of the lighting fixture due to differences in ambient temperature.

  According to invention of Claim 3, the control terminal device arrange | positioned in the lighting fixture with the least luminous flux from a discharge lamp is selected as one control terminal device, and a luminous flux equivalent to the least luminous flux is obtained. Since the dimming rate of the discharge lamp of the luminaire in which the remaining control terminal device is arranged is changed, it is possible to suppress variations in the light output of the luminaire due to the difference in ambient temperature, and It is possible to prevent the discharge lamp from having a short life due to the fact that power exceeding the rated power is not applied to the discharge lamp in the vicinity of light lighting or all-light lighting.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  1 to 6 show an embodiment of the present invention, FIG. 1 is a schematic block diagram showing a configuration of a lighting control system, FIG. 2 is a schematic block diagram showing a configuration of a lighting fixture, and FIG. 3 is a main operation panel. 4 is a schematic block diagram showing the configuration of the apparatus, FIG. 4 is a characteristic diagram showing the luminous flux ratio with respect to the ambient temperature of the discharge lamp in accordance with the dimming rate of the discharge lamp, and FIG. FIG. 6 and FIG. 6 are explanatory diagrams showing the luminous flux ratio with respect to the ambient temperature of the discharge lamp based on temperature information.

  In FIG. 1, the lighting control system 1 includes a lighting fixture 2, a temperature sensor 3, a control terminal device 4, and a main operation panel device 5. The lighting fixture 2 is, for example, an inverted Fuji-type direct mounting lighting fixture, and a plurality (N pieces) are attached to the ceiling surface. Each luminaire 2 is provided with fluorescent lamps 6 and 6 as two discharge lamps. The fluorescent lamps 6 and 6 are straight tube fluorescent lamps, and are mounted on a lamp socket (not shown) so as to face the reflecting plate 2 a of the lighting fixture 2. The fluorescent lamps 6 and 6 are controlled to be turned on by the control terminal device 4 disposed inside the lighting fixture 2. The ambient temperature of the fluorescent lamps 6 and 6 is detected by the temperature sensor 3. The temperature sensor 3 is disposed inside the lighting fixture 2, and its temperature detection unit is exposed on the outer surface of the reflector 2 a in the middle of the fluorescent lamps 6 and 6.

  The control terminal device 4 is connected to the main operation panel device 5 via the transmission line 7 and receives an illumination control signal for turning on / off the fluorescent lamps 6 and 6 (lighting-off) or dimming from the main operation panel device 5. To do. The control terminal device 4 has an address and is configured to capture an illumination control signal that matches the address.

  A plurality of monitoring terminal devices 8 are connected to the transmission line 7. The monitoring terminal device 8 is a wall switch device that turns on and off the fluorescent lamps 6 and 6 by manual operation, a human sensor device that detects the human body and turns on and off the fluorescent lamps 6 and 6, and a desired dimming rate for the fluorescent lamps 6 and 6 And a control signal for controlling the lighting state of the fluorescent lamps 6 and 6 and the like. Transmit to device 5. Here, the monitoring terminal device 8 can control the fluorescent lamps 6 and 6 (lighting fixtures 2) individually or in groups. The transmission line 7 is a transmission line that transmits / receives data indicated by a time-division multiplexed signal of double poles (± 24V), or a line that performs Ethernet or power line communication.

  When the control terminal device 5 sends a control signal for turning on / off the fluorescent lamps 6, 6 or a control signal for dimming the fluorescent lamps 6, 6 from the monitoring terminal device 8, the transmission line 7 The control signal is received, and an illumination control signal corresponding to the control signal is generated and transmitted to the transmission line 7. The control terminal device 4 receives the illumination control signal from the transmission line 7, generates a dimming signal corresponding to the illumination control signal, and controls the lighting of the fluorescent lamps 6 and 6. As a result, the fluorescent lamps 6 and 6 are lit at a desired dimming rate set by the main operation panel device 5 or the monitoring terminal device 8.

  Then, the control terminal device 4 generates a temperature information signal corresponding to the temperature detected by the temperature sensor 3 (ambient temperature of the fluorescent lamps 6, 6) and transmits it to the main operation panel device 5 via the transmission line 7. The address of the control terminal device 4 is given to the temperature information signal. The main operation panel device 5 receives the temperature information signal via the transmission line 7 and selects one control terminal device 4 among the plurality of control terminal devices 4 based on the temperature information signal. One control terminal device 4 is selected arbitrarily or under a predetermined condition.

  Then, the dimming rate of the fluorescent lamps 6 and 6 corresponding to the remaining control terminal devices 4 is such that the luminous flux ratio is equivalent to the luminous flux ratio with respect to the ambient temperature of the fluorescent lamps 6 and 6 in one control terminal device 4. Is calculated and changed based on the luminous flux ratio. An illumination control signal to which the changed light control rate is applied is output to the transmission line 7.

  One control terminal device 4 and the remaining control terminal devices 4 each receive an illumination control signal having the same address from the transmission line 7. Then, one control terminal device 4 controls the lighting of the fluorescent lamps 6 and 6 at a preset dimming rate, and the remaining control terminal devices 4 control the fluorescent lamps 6 and 6 at the changed dimming rate. 6 is turned on. As a result, the luminous flux from the fluorescent lamps 6 and 6 lit by the one control terminal device 4 and the luminous flux from each of the fluorescent lamps 6 and 6 lit by the remaining control terminal device 4 are substantially equal. That is, even if the ambient temperatures of the fluorescent lamps 6 and 6 in the individual lighting fixtures 2 are different, substantially the same luminous flux is emitted from all the lighting fixtures 2 and the variation in the light output of the lighting fixtures 2 is suppressed. Is done. As a result, unevenness in brightness due to different ambient temperatures can be prevented, and the luminance of the luminaire 2 when looking up at the ceiling can be made substantially constant.

  As illustrated in FIG. 2, the control terminal device 4 includes a transmission / reception unit 10, a storage unit 11, a control unit 12, a lighting circuit unit 13, and a power supply unit 14, and is configured as a unit.

  The transmission / reception unit 10 is connected to the transmission line 7 via the connection terminals 15 and 15 and receives various control signals such as an illumination control signal and a request signal from the transmission line 7. Then, the control signal matching the address of its own control terminal device 4 is sent to the control unit 12. The temperature information signal generated by the control unit 12 is transmitted to the transmission line 7. The storage unit 11 stores an address of the control terminal device 4 and the like.

  The control unit 12 is formed with a microcomputer, and an illumination control signal and a request signal are input from the transmission line 7 via the transmission / reception unit 10, and ambient temperature data of the fluorescent lamps 6 and 6 is input from the temperature sensor 3. Is done. When the illumination control signal is input, a dimming signal corresponding to the illumination control signal is generated by arithmetic processing, and the dimming signal is sent to the lighting circuit unit 13. Further, when a request signal is input, a temperature information signal corresponding to the ambient temperature of the fluorescent lamps 6 and 6 is generated by arithmetic processing and transmitted from the transmission / reception unit 10 to the transmission line 7.

  The lighting circuit unit 13 is connected to a commercial AC power supply AC via connection terminals 16 and 16, converts a DC voltage into a predetermined DC voltage and outputs the DC voltage unit (not shown), and converts the DC voltage into a high-frequency AC voltage. An inverter circuit portion (not shown) that converts and applies to the fluorescent lamps 6 and 6 is formed. Then, the fluorescent lamps 6 and 6 are turned on at a high frequency in accordance with the dimming signal sent from the control unit 12.

  The power supply unit 14 is connected to the commercial AC power supply AC via the connection terminals 16 and 16 and supplies the DC power to the control unit 12 and the like to operate.

  The main operation panel device 5 performs overall management of the entire system, and is installed, for example, for each lighting zone. As shown in FIG. 3, the communication unit 17, the storage unit 18, the clock unit 19, the screen input unit 20, the power supply unit 21, and the main control unit 22 are configured.

  The communication unit 17 is connected to the transmission line 7 via the connection terminals 23 and 23, and transmits a lighting control signal for controlling the lighting of the fluorescent lamps 6 and 6, a request signal for obtaining temperature information of the lighting fixture 2, and the like. At the same time, it is configured to receive control data from the monitoring terminal device 8 and a temperature information signal from the control terminal device 4.

  As shown in FIG. 4, the storage unit 18 stores characteristic data of the luminous flux ratio with respect to the ambient temperature of the fluorescent lamps 6 and 6 according to the dimming rate of the fluorescent lamps 6 and 6. Here, it is desirable that the storage unit 18 stores the dimming rate of the fluorescent lamps 6 and 6 as finely as possible. Further, the storage unit 18 stores the addresses of the control terminal device 4 and the monitoring terminal device 8, the time when the request signal is transmitted to the transmission line 7, and the like.

  The clock unit 19 measures time. The screen input unit 20 includes a touch panel, for example, and is formed so that various data such as on / off of the fluorescent lamps 6 and 6 (lights on / off) and dimming rate of the fluorescent lamps 6 and 6 can be input. That is, similarly to the monitoring terminal device 8, the lighting state of the fluorescent lamps 6 and 6 is controlled also from the screen input unit 20. The power supply unit 21 is connected to the commercial AC power supply AC via the connection terminals 24 and 24, and operates by supplying DC power to the main control unit 22 or the like.

  The main control unit 22 is configured by a microcomputer or the like, and is configured to perform various arithmetic processes and controls. That is, an illumination control signal is calculated and generated according to the control signal sent from the monitoring terminal device 8 or the control signal inputted from the screen input unit 20, and transmitted from the communication unit 17 to the transmission line 7. Further, when the time measured by the time measuring unit 19 becomes the time stored in the storage unit 18, the request signal is transmitted to the transmission line 7. The time is, for example, every 20 minutes.

  Hereinafter, the operation of the main control unit 22 will be described with reference to FIG. The main control unit 22 transmits a request signal from the communication unit 17 to the transmission line 7 when the time measured by the time measuring unit 19 reaches a predetermined time stored in the storage unit 18 (step S1). Each control terminal device 4 transmits a temperature information signal to the transmission line 7. When the communication unit 19 receives the temperature information signal (step S2), the main control unit 22 controls the dimming rate of the fluorescent lamps 6 and 6 given to the illumination control signal from the storage unit 18 (hereinafter, this dimming rate). Is referred to as a reference dimming ratio), and the characteristic data of the luminous flux ratio with respect to the ambient temperature of the fluorescent lamps 6 and 6 is read (step S3). Here, when the characteristic data of the luminous flux ratio at the reference dimming rate is not stored in the storage unit 18, the characteristic data of the luminous flux ratio with respect to the ambient temperature of the fluorescent lamps 6 and 6 at the dimming rate close to the reference dimming rate is stored. Reading and calculating the light flux ratio with respect to the ambient temperature of the fluorescent lamps 6 and 6 at the reference dimming rate.

  Based on the characteristics of the luminous flux ratio at the reference dimming rate, the luminous flux ratio at the ambient temperature of the fluorescent lamps 6 and 6 given to all temperature information signals (addresses 1 to N) at the reference dimming rate is calculated. Calculation is performed (step S4). Then, one control terminal device 4 is selected (step S5). This one control terminal device 4 may be any of the plurality of control terminal devices 4, and may be, for example, the control terminal device 4 of the lighting fixture 2 disposed in the center of the room. Further, in the calculation result of the luminous flux ratio, the control terminal device 4 can transmit the temperature information signal having the largest or smallest computed luminous flux ratio. One control terminal device 4 having the largest (smallest) luminous flux ratio can be selected by sequentially comparing the luminous flux ratios given to the temperature information signal.

  Then, when the main control unit 22 selects one control terminal device 4, the remaining control terminals are set so as to have a light beam ratio equivalent to the light beam ratio in the one control terminal device 4 based on the calculation result of the light beam ratio. The dimming rates of the fluorescent lamps 6 and 6 corresponding to the device 4 are respectively calculated (step S6). For example, as shown in FIG. 6, the dimming rate includes the luminous flux ratio at the ambient temperature (20 ° C.) of one control terminal device 4 and the ambient temperature of the remaining control terminal device 4 (18 ° C., 23.5 ° C., ... Are obtained, and each dimming rate to be corrected (increased or decreased) is calculated by dividing the luminous flux ratio per 1% of the dimming rate, and given to the initial illumination control signal. It can be obtained by adding to the light control rate.

  And the illumination control signal which assign | provided the calculated light control rate is each produced | generated (step S7), and the illumination control signal to which the reference | standard light control rate was provided is output with respect to one control terminal device 4, and the remainder The control terminal device 4 outputs an illumination control signal to which the changed dimming rate is assigned (step S8).

  Thereafter, the main control unit 22 determines whether or not a control signal (turn-off signal) for turning off the fluorescent lamps 6 and 6 is output from the screen input unit 20 of the monitoring terminal device 8 or the main operation panel device 5 ( Step S9). When the extinguishing signal is output, the control operation is terminated. If the turn-off signal is not output, whether or not a control signal (change signal) for changing the dimming rate of the fluorescent lamps 6 and 6 is output from the monitor terminal device 8 or the screen input unit 20 of the main operation panel device 5. Is determined (step S10).

  If the change signal has not been output, the process returns to step S1, and the time measured by the time measuring unit 19 is compared with the predetermined time stored in the storage unit 18. And if the said change signal is output, the illumination control signal which provided the changed light control rate will be produced | generated (step S11), and this illumination control signal may be output with respect to all the control terminal devices 4. It is configured. The fluorescent lamps 6 and 6 of all the lighting fixtures 2 are turned on with the changed light control rate. Thereafter, the time measured by the time measuring unit 19 is compared with a predetermined time stored in the storage unit 18, and the operation after step S1 is performed.

  As described above, the main control unit 22 of the main operation panel device 5 inputs the ambient temperature of the fluorescent lamps 6 and 6 of all the lighting fixtures 2 (control terminal device 4), and stores the fluorescence stored in the storage unit 18. Based on the characteristic data of the luminous flux ratio with respect to the ambient temperature of the lamps 6, 6, the fluorescent lamps 6, 6 corresponding to the remaining control terminal devices 4 have the same luminous flux ratio as that of the one control terminal device 4. The light control rate is calculated, and the illumination control signal to which the light control rate is given is transmitted to the remaining control terminal devices 4. That is, the luminaire 2 in which the remaining control terminal device 4 is disposed so that a light beam equivalent to the light beam from the fluorescent lamps 6 and 6 of the luminaire 2 in which the one control terminal device 4 is disposed is obtained. The dimming rates of the fluorescent lamps 6 and 6 are respectively changed. Thereby, even if the ambient temperature of the fluorescent lamps 6 and 6 of the individual lighting fixtures 2 is different, variation in light output (light flux) from the lighting fixtures is suppressed, and uneven brightness due to the lighting fixtures 2 can be suppressed. In addition, the luminance of the lighting fixture 2 when looking up at the lighting fixture 2 can be made substantially constant.

  Then, when the control terminal device 4 having the largest luminous flux ratio is selected as one control terminal device 4, the remaining control terminal device 4 is disposed so that a luminous flux equivalent to the largest luminous flux is obtained. Since the dimming rates of the fluorescent lamps 6 and 6 of the fixture 2 are respectively changed, it is possible to illuminate brightly while suppressing variations in the light output of the lighting fixture due to differences in ambient temperature.

  Further, when the control terminal device 4 having the smallest luminous flux ratio is selected as one control terminal device 4, the remaining control terminal device 4 is disposed so that a luminous flux equivalent to the smallest luminous flux can be obtained. Since the dimming ratios of the fluorescent lamps 6 and 6 of the fixture 2 are changed, the rated power is supplied to the fluorescent lamps 6 and 6 when the fluorescent lamps 6 and 6 are all light (100%) or in the vicinity of all the lights. It is possible to prevent the application of excessive electric power, and it is possible to prevent the fluorescent lamps 6 and 6 from having a short life.

  In the above-described embodiment, the control terminal device 4 is configured to transmit the temperature information signal in response to the request signal transmitted from the main operation panel device 5. However, the control terminal device 4 periodically or A temperature information signal may be transmitted when the ambient temperature of the fluorescent lamps 6 and 6 changes. In addition, a temperature information signal is transmitted from the one control terminal device 4 every predetermined time, and the main operation panel device 5 receives the temperature information signal from the remaining control terminal devices 4 when there is a change in the temperature information. The dimming rate of the fluorescent lamps 6 and 6 may be reset.

The schematic block diagram of the structure of the illumination control system which shows one embodiment of this invention. Similarly, the schematic block diagram which shows the structure of a lighting fixture. Similarly, the schematic block diagram which shows the structure of a main operation panel apparatus. Similarly, the characteristic figure which shows the light beam ratio with respect to the ambient temperature of a discharge lamp according to the light control rate of a discharge lamp. Similarly, the flowchart which shows operation | movement of the main control part of a main operation panel apparatus. Similarly, it is explanatory drawing which shows the light beam ratio with respect to the ambient temperature of a discharge lamp by temperature information.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lighting control system 2 ... Lighting fixture 3 ... Temperature sensor 4 ... Control terminal device 5 ... Main operation panel apparatus 11 ... Transmission / reception part 12 ... Control part 13 ... Lighting circuit part 17 ... Communication part 18 ... Memory | storage part 22 ... Main control part

Claims (3)

A plurality of lighting fixtures provided with discharge lamps;
A temperature sensor disposed in each of the lighting fixtures for detecting the ambient temperature of the discharge lamp;
A transmission / reception unit that is connected to the transmission line and receives the illumination control signal from the transmission line and transmits a temperature information signal to the transmission line, and generates a dimming signal according to the illumination control signal and is detected by the temperature sensor A control terminal provided in each lighting fixture, including a control unit that generates a temperature information signal according to the ambient temperature of the discharge lamp and a lighting circuit unit that lights the discharge lamp according to the dimming signal With the device;
A storage unit that stores characteristic data of a luminous flux ratio with respect to the ambient temperature of the discharge lamp according to the dimming rate of the discharge lamp, and an illumination control signal is transmitted to the control terminal device via the transmission line and from the control terminal device A communication unit that receives a temperature information signal via the transmission line, and when the communication unit receives the temperature information signal, reads out the characteristic data of the luminous flux ratio with respect to the ambient temperature of the discharge lamp from the storage unit, and one control terminal The dimming rate of the discharge lamp corresponding to the remaining control terminal device is set so that the luminous flux ratio is equivalent to the luminous flux ratio obtained from the dimming rate of the discharge lamp corresponding to the device and the temperature information signal based on the characteristic data. A main operation panel device having a main control unit that calculates and generates an illumination control signal to which the calculated dimming rate is applied and transmits the illumination control signal from the communication unit to the control terminal device via the transmission line;
A lighting control system comprising:   The main control unit of the main operation panel device selects a control terminal device that transmits a temperature information signal having the highest luminous flux ratio with respect to the ambient temperature of the discharge lamp as one control terminal device. Lighting control system.   2. The main control unit of the main operation panel device selects, as one control terminal device, a control terminal device that transmits a temperature information signal having the smallest luminous flux ratio with respect to the ambient temperature of the discharge lamp. Lighting control system.

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