JP2015149166A - Illumination control device, illumination system, illumination control method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable approach of illuminance at a control target position in a predetermined area to a target illuminance even when some illuminance equipment is deteriorated.SOLUTION: An illuminance control device 30 has a first operation part 31 for calculating an influence degree coefficient of each illumination equipment 10 to the illuminance of a control target position on the basis of a light distribution characteristic of the illumination equipment 10, a second operation part 32 for calculating the optimum combination of dimming levels on the basis of the influence degree coefficient of each illumination equipment 10 to the control target position so that the illuminance at the control target position is approached to a target illuminance, a dimming controller 33 for controlling the dimming levels of the respective illuminance equipment according to the calculation result of the second operation part 32, and a third operation part 34 for calculating the light distribution characteristic of each illuminance equipment 10. When the light distribution characteristic calculated by the third operation part 34 varies, the first operation part 31 re-calculates the influence degree coefficient on the basis of the light distribution characteristic after the variation, and the second operation part 32 re-calculates the optimum combination of the dimming levels on the basis of the re-calculated influence degree coefficient.

Description

  The present invention relates to an illumination control device, an illumination system, an illumination control method, and a program that integrally control a plurality of illumination devices distributed and arranged in a predetermined area.

  In recent years, LED lighting devices using LEDs as light sources have become widespread. LED lighting equipment has low power consumption and is advantageous for power saving. In addition, space illumination can be finely adjusted by controlling the dimming level, so that it is required to realize power saving without reducing work efficiency. It is extremely effective as lighting equipment for offices.

  If the LED lighting device is deteriorated in the light source or the like, the required light intensity cannot be obtained even when the target dimming level is set, and it becomes impossible to illuminate the desired position with the target illuminance. In order to suppress such a decrease in illuminance due to deterioration of the light source over time, Patent Document 1 detects the brightness (illuminance) around the light source using an illuminance sensor, and the light source deteriorates over time and the amount of light decreases. In this case, it is described that the output is corrected by a control such as increasing the current value, and the brightness of the light source is maintained in a state equivalent to that of a new product.

  However, since the technology described in Patent Document 1 is configured to compensate for a decrease in illuminance due to deterioration over time by increasing the output of the light source, the required illuminance cannot be obtained even if the output is increased as the deterioration of the light source proceeds. Unless it is exchanged, it becomes impossible to illuminate the desired position with the target illuminance.

  The present invention has been made in view of the above, and appropriately integrates and controls a plurality of lighting devices dispersedly arranged in a predetermined region, so that even if some of the lighting devices are deteriorated, they are within the predetermined region. It is an object of the present invention to provide an illumination control device, an illumination system, an illumination control method, and a program that can bring the illuminance at the control target position close to the target illuminance.

  In order to solve the above-described problems and achieve the object, the present invention is an illumination control device that integrally controls a plurality of illumination devices dispersedly arranged in a predetermined region, based on the light distribution characteristics of the illumination devices. A first computing unit that calculates an influence coefficient representing the degree of influence of the lighting device on the illuminance at the position to be controlled in the predetermined area, and the influence coefficient calculated for each of the plurality of lighting devices. A second calculation unit that calculates an optimal combination of dimming levels of each lighting device for bringing the illuminance at the control target position closer to the target illuminance, and each of the plurality of lighting devices according to the calculation result of the second calculation unit A dimming control unit that controls the dimming level, and a third calculation unit that calculates the light distribution characteristics of the lighting device based on a measurement result of an illuminance measuring device that measures the illuminance in the vicinity of the lighting device. Prepared, When the light distribution characteristic calculated by the third calculation unit changes, the first calculation unit recalculates the influence coefficient based on the changed light distribution characteristic, and the second calculation unit The optimal combination is recalculated based on the recalculated influence coefficient.

  According to the present invention, even when some of the lighting devices are deteriorated, the lowering of the illuminance due to the deteriorated lighting device is appropriately compensated by the other lighting devices, and the illuminance at the control target position is brought close to the target illuminance. There is an effect that can be.

Drawing 1 is a lineblock diagram showing the outline of the lighting system of an embodiment. FIG. 2 is a diagram for explaining an arrangement example of the illuminance sensor. FIG. 3 is a diagram illustrating the light distribution characteristics of the lighting device. FIG. 4 is a diagram for explaining an example of a method for calculating the influence coefficient. FIG. 5 is a flowchart illustrating an example of a processing procedure of the illumination control apparatus. FIG. 6 is a diagram for explaining the conditions of the embodiment. FIG. 7 is a diagram illustrating a simulation result before the light distribution characteristic is changed. FIG. 8 is a diagram illustrating a simulation result of a comparative example in which a change in the light distribution characteristic is not fed back to the control. FIG. 9 is a diagram illustrating a simulation result of an example in which a change in the light distribution characteristic is fed back to the control. FIG. 10 is a block diagram schematically illustrating an example of a hardware configuration of the illumination control device.

  Embodiments of a lighting control device, a lighting system, a lighting control method, and a program according to the present invention will be described below with reference to the accompanying drawings. The embodiment described below is an application example to an illumination system in an office where a plurality of workers work.

  In an office where a plurality of workers work, it is required to save power by reducing the power consumption of the office without reducing the work efficiency of each worker. The lighting system according to the present embodiment is configured so that each illumination device can bring the illuminance at the position where the worker is working closer to the target illuminance while suppressing the total amount of power consumed by the plurality of illumination devices distributed in the office as much as possible. Control the dimming level. Thereby, power saving is realized while suppressing a reduction in work efficiency of each worker.

  FIG. 1 is a configuration diagram showing an outline of the illumination system of the present embodiment. As shown in FIG. 1, the lighting system of the present embodiment includes a plurality of lighting devices 10 distributed in an office that is a predetermined area, and a plurality of illuminance sensors 20 that measure the illuminance in the vicinity of each lighting device 10. And a lighting control device 30 that integrally controls the plurality of lighting devices 10.

  The plurality of lighting devices 10 and the plurality of illuminance sensors 20 are connected to the lighting control device 30 through a wireless communication network such as Wi-Fi (Wireless Fidelity), for example. In addition, the communication method between the plurality of illumination devices 10 and the plurality of illuminance sensors 20 and the illumination control device 30 is not limited to Wi-Fi, and other wireless communication methods may be used. A wired communication system using an Ethernet (registered trademark) cable or PLC (Power Line Communication) can also be used.

  In the present embodiment, it is assumed that a straight tube type LED fluorescent lamp using an LED (Light Emitting Diode) as a light source is used as the lighting device 10. However, the illuminating device 10 should just be the structure which can carry out remote control of the light control level, and is not restricted to a straight tube | pipe type LED fluorescent lamp.

  The illuminance sensor 20 is an illuminance measuring device that measures the illuminance in the vicinity of the lighting device 10. FIG. 2 is a diagram for explaining an arrangement example of the illuminance sensor 20. In the present embodiment, for example, as shown in FIG. 2, four illuminance sensors 20 are evenly arranged around a straight tube type LED fluorescent lamp used as the illuminating device 10, and the four illuminance sensors 20 use the illumination device 10. Measure the illuminance in the vicinity. In the present embodiment, based on the illuminance in the vicinity of each lighting device 10 measured by these illuminance sensors 20, changes in the light distribution characteristics of the lighting device 10 can be detected at any time.

  Note that the illuminance measuring instrument that measures the illuminance in the vicinity of the lighting device 10 is not limited to the illuminance sensor 20. For example, it is good also as a structure which measures the illumination intensity of the vicinity of the illuminating device 10 by using the camera instead of the illuminance sensor 20, and analyzing the image around the illuminating device 10 image | photographed with the camera.

  In the present embodiment, it is assumed that each worker who performs work in the office carries a WSS (work state sensor) 40. The WSS 40 is a small indoor positioning device equipped with an acceleration, gyroscope, geomagnetic sensor, and a position / posture detection function based on pedestrian inertial navigation technology (PDR: Pedestrian Dead Reckoning).

  The WSS 40 carried by each worker is connected to the lighting control device 30 through a wireless communication network such as Wi-Fi, for example, and transmits the position and posture of the worker in the office to the lighting control device 30 as needed. As a technique for detecting the position and posture of a worker in the office using the PDR, for example, a technique described in JP 2013-137178 A can be used. The WSS 40 can be realized, for example, by mounting a position / posture detection function using PDR as an application program on a mobile terminal such as a smartphone having an acceleration, gyroscope, or geomagnetic sensor.

  The lighting control device 30 is typically realized as a server device including a hardware configuration (processor, main storage unit, auxiliary storage unit, communication interface) as a general computer system. However, the method of realizing the lighting control device 30 is not limited to this example, and may be realized as a virtual machine that operates on a cloud system, or as a computer system such as an MFP (multifunction machine) installed in an office. It may be realized as an application that operates on an office device having the hardware configuration described above. In the present embodiment, it is assumed that the illumination control device 30 is realized as a server device.

  As illustrated in FIG. 1, the illumination control device 30 includes a first calculation unit 31, a second calculation unit 32, a dimming control unit 33, a third calculation unit 34, and a storage unit 35. The first calculation unit 31, the second calculation unit 32, the dimming control unit 33, and the third calculation unit 34 are generated on the main storage unit by, for example, the processor executing a predetermined program using the main storage unit. Functional component. The storage unit 35 is a storage area realized by, for example, an auxiliary storage unit, and includes illumination position data D1 indicating the installation position and size (length) of each illumination device 10 in the office, and light distribution characteristics of each illumination device 10. Is stored. Once the illumination position data D1 is stored in the storage unit 35, it is not updated unless the installation position of the illumination device 10 is changed due to office construction or the like. On the other hand, the light distribution characteristic data D2 is updated to data indicating a new light distribution characteristic every time the third computing unit 34 detects that the light distribution characteristic of the lighting device 10 has changed.

  Here, the light distribution characteristic of the illumination device 10 will be described. 3A and 3B are diagrams illustrating the light distribution characteristics of the lighting device 10, where FIG. 3A is a diagram illustrating a light distribution curve in the A cross section and the B cross section of the lighting device 10, and FIG. The figure explaining a B cross section, (c) is the figure which converted the light distribution curve in A cross section into the graph showing the relationship between an angle and a luminous intensity. In FIG. 3C, the horizontal axis represents the angle θ with respect to the lighting device 10 directly below (vertical direction), and the vertical axis represents the light intensity when the light intensity directly below the lighting device 10 (θ = 0) is 100%. Represents a relative value.

  The light distribution characteristic shown in FIG. 3 is widely known as an index representing the performance of the lighting device 10, and can be obtained by calculation from the illuminance near the lighting device 10. The storage unit 35 of the lighting control device 30 stores in advance light distribution characteristic data D2 representing the light distribution characteristic in the initial state for each of all the lighting devices 10 installed in the office which is a predetermined area. The light distribution characteristic data D2 can be stored in the storage unit 35, for example, as a function or a table representing the relationship between the angle θ and the light intensity shown in FIG.

  The light distribution characteristics of the lighting device 10 change according to the degree of deterioration when the light source of the lighting device 10 deteriorates with time. Therefore, in the lighting system of the present embodiment, the third calculation unit 34 of the lighting control device 30 calculates the light distribution characteristics of each lighting device 10 using the measurement result of the illuminance sensor 20 at a predetermined timing, and the lighting device 10. If the light distribution characteristic of the light distribution characteristic is changed, the light distribution characteristic data D2 stored in the storage unit 35 is updated to data indicating a new light distribution characteristic.

  Based on the illumination position data D1 and the light distribution characteristic data D2 stored in the storage unit 35, the first calculation unit 31 calculates an influence coefficient that represents the degree of influence of the lighting device 10 on the illuminance at the control target position in the office. To do.

  The control target position is a position to be controlled to secure necessary illuminance. In the present embodiment, each position where a worker in the office exists is set as a control target position. The first calculation unit 31 acquires the position of each worker from the WSS 40 carried by each worker in the office, and sets the control target position in the office. And the 1st calculating part 31 each calculates the influence coefficient of each lighting apparatus 10 installed in the office using the illumination position data D1 and the light distribution characteristic data D2 for each of the set control target positions. .

  For example, the first calculation unit 31 can calculate the influence coefficient of each lighting device 10 with respect to the control target position using a calculation formula of normal illuminance by a linear light source among illuminance calculation formulas by a point method. it can. FIG. 4 is a diagram for explaining an example of a method for calculating the influence coefficient by the first calculation unit 31. In FIG. 4, l represents the size (length) of the lighting device 10, and h represents the installation height of the lighting device 10. Also, i in FIG. 4 represents a control target position, d represents a horizontal distance from directly below the lighting device 10 to the control target position i, and θ represents a direction directly below the lighting device 10 and a normal direction to the control target position i. It represents the angle between

Here, if the light intensity in the normal direction (angle θ direction) when the turns on the lighting device 10 at the dimming level of 1% and I [theta] _1, the influence coefficient a of the lighting device 10 for the control target position i is linear From the calculation formula of the normal illuminance by the light source, it can be expressed as the following formula (1).

The parameters l, h, d, and θ in Expression (1) can be obtained using the illumination position data D1 stored in the storage unit 35 when the control target position i is determined. Also, it [theta] ₁ can be obtained by using the light distribution characteristic data D2 storage unit 35 stores. Therefore, if the control target position i is determined, each lighting device 10 for the control target position i is obtained by performing the calculation based on the expression (1) using the illumination position data D1 and the light distribution characteristic data D2 stored in the storage unit 35. Can be calculated.

  The second calculation unit 32 uses each lighting device 10 to bring the illuminance at the control target position i closer to the target illuminance based on the influence coefficient a calculated by the first calculation unit 31 for each lighting device 10 in the office. The optimal combination of dimming levels is calculated.

  The target illuminance with respect to the control target position i (the position where the worker in the office exists in the present embodiment) may be a predetermined fixed illuminance, but varies depending on the posture of the worker existing at the control target position i. It is desirable to set the target illuminance. For example, since workers in an office generally work in a sitting state, the target illuminance at a control target position i where a worker with a posture is in a sitting state is set to a worker whose posture is in a standing state or a walking state. By setting the illuminance to be higher than the target illuminance at the control target position i in which there is, it is possible to perform more effective control in realizing power saving while suppressing a reduction in work efficiency of each worker. In addition to this, there are workers who are in business by pre-determining the posture that the worker is estimated to be working and the posture that is not, and judging whether the worker is working from the posture of the worker It is also effective to set the target illuminance of the control target area i high. In these cases, the second calculation unit 32 acquires the posture of each worker from the WSS 40 carried by each worker in the office, and sets the target illuminance for the control target position i in the office to the posture of the worker existing there. Set accordingly.

  Also, the target illuminance for the control target position i is set to a different target illuminance depending on the position conditions in the office, for example, a low illuminance is set for a position where a lot of outside light enters, such as the window side in the office. You may do it.

The second calculation unit 32 uses, for example, the following formula (2) and formula (3) for each control target position i using the influence coefficient a of each lighting device 10 calculated by the first calculation unit 31. By performing the calculation, it is possible to calculate an optimal combination of the dimming levels of the respective lighting devices 10 for bringing the illuminance at the control target position i closer to the target illuminance. That is, when the value represented by the following equation (2) is J, the second calculation unit 32 changes the value of J so that the differential value (∂J / ∂δ) becomes zero. The optimal solution is calculated by the following equation (3).
In Expressions (2) and (3), E represents the illuminance, D represents the dimming level, and P represents the power consumption of the lighting device 10. The number of the lighting apparatus 10 is set to m, and represents the ∂E ^m _i / ∂D _m the influence coefficient a m-th lighting apparatus 10 of for the control target position i. α and β are weights that determine whether to give priority to achieving the target illuminance or to give priority to reducing power consumption.

  For example, the second calculation unit 32 performs the above calculation on each control target position i in the office, thereby adjusting the illuminance of each control target position i to the target illuminance. Calculate the optimal combination of levels. At this time, the second calculation unit 32 appropriately adjusts the values of the weights α and β in the equation (2) to bring the illuminance at the control target position i closer to the target illuminance and the total power consumption of each lighting device 10. So that the optimal combination of dimming levels of each lighting device 10 can be calculated.

  The dimming control unit 33 controls the dimming level of each lighting device 10 in the office according to the calculation result of the second calculation unit 32. Specifically, the dimming control unit 33 changes the dimming level by wireless communication, for example, for the lighting device 10 that is determined to need to change the dimming level as a result of the calculation by the second calculation unit 32. Control signal to be transmitted. Accordingly, the dimming level of each lighting device 10 is automatically controlled so that the illuminance at the control target position i in the office approaches the target illuminance.

  As described above, the third calculation unit 34 calculates the light distribution characteristic of each lighting device 10 based on the measurement result of the illuminance sensor 20 that measures the illuminance in the vicinity of each lighting device 10 in the office. And if the 3rd calculating part 34 has changed from the light distribution characteristic memorize | stored as the light distribution characteristic data D2 in the memory | storage part 35 in the calculated light distribution characteristic of each illuminating device 10, The light distribution characteristic data D2 of the lighting device 10 is updated to the light distribution characteristic data D2 representing the newly calculated light distribution characteristic.

  The timing at which the third calculation unit 34 calculates the light distribution characteristics of each lighting device 10 can be arbitrarily determined. For example, the third calculation unit 34 calculates a light distribution characteristic of each lighting device 10 as a one-day cycle, turns on each lighting device 10 once at an office start time, etc., and the third calculation unit 34 sets each lighting device. The light distribution characteristic of the device 10 may be calculated. Moreover, it is good also as a structure which the 3rd calculating part 34 calculates the light distribution characteristic of each illuminating device 10, whenever the dimming level of each illuminating device 10 is controlled by the dimming control part 33. FIG.

  In the illumination control device 30 of the present embodiment, when the third calculation unit 34 detects a change in the light distribution characteristic of the lighting device 10 and updates the light distribution characteristic data D2 stored in the storage unit 35, the first calculation is performed. The unit 31 recalculates the influence coefficient a of the lighting device 10 with respect to the control target position i using the updated light distribution characteristic data D2. And the 2nd calculating part 32 recalculates the optimal combination of the light control level of each illuminating device 10 using the influence coefficient a of the illuminating device 10 newly calculated, and light control is performed according to the calculation result. The unit 33 controls the dimming level of each lighting device 10. In this way, when some of the lighting devices 10 are deteriorated and the light distribution characteristics are changed, the change in the light distribution characteristics is fed back to recalculate the optimal combination of the dimming levels of the respective lighting devices 10. Thereby, the optimal combination of the light control level which can compensate the fall of the illumination intensity by degradation of some lighting equipment 10 with the other lighting equipment 10 can be calculated | required.

  Here, the operation | movement by the illumination control apparatus 30 of this embodiment is demonstrated with reference to FIG. FIG. 5 is a flowchart illustrating an example of a processing procedure of the illumination control device 30. In the example illustrated in FIG. 5, each time the dimming level of each lighting device 10 is controlled by the dimming control unit 33, the light distribution characteristic of each lighting device 10 is calculated, and the light distribution of any one of the lighting devices 10 is calculated. In this example, if the characteristics have changed, the change is fed back to recalculate the optimal combination of the dimming levels of each lighting device 10. The series of processing shown in the flowchart of FIG. 5 is repeatedly executed by the lighting control device 30 at a predetermined cycle.

  When the process is started, first, the first calculation unit 31 determines whether or not there is a worker in the office (step S101). This determination is performed based on, for example, whether or not position information indicating a position in the office has been received from the WSS 40 carried by at least one worker. If there is no worker in the office (step S101: No), the process is terminated as it is. On the other hand, when a worker exists in the office (step S101: Yes), the first calculation unit 31 sets a position where the worker in the office exists as a control target position i (step S102).

  Next, the first calculation unit 31 uses the lighting position data D1 and the light distribution characteristic data D2 stored in the storage unit 35 to control each control target set in step S102 for each lighting device 10 in the office. The influence coefficient a for the position i is calculated (step S103).

  Next, the 2nd calculating part 32 sets target illumination intensity about each of each control object position i set by step S102 (step S104). The target illuminance at the control target position i is, for example, the position of the worker estimated to be performing business based on the posture information indicating the posture of the worker received from the WSS 40 carried by the worker present at the control target position i. The required illuminance is set.

  Next, the second calculation unit 32 performs the calculation using the above-described equations (2) and (3) using the influence coefficient a calculated in step S103, and is set in step S102. An optimal combination of dimming levels of each lighting device 10 for calculating the illuminance at each control target position i close to the target illuminance set in step S104 is calculated (step S105).

  Next, the dimming control unit 33 transmits a control signal to the lighting device 10 that needs to change the dimming level so as to realize the optimum combination of dimming levels calculated in step S105, and the office The dimming level of each lighting device 10 is controlled (step S106).

  Next, the 3rd calculating part 34 reads the measured value of the illumination intensity sensor 20 arrange | positioned around each illumination device 10 (step S107), and based on the illumination intensity of each illumination device 10 vicinity, each illumination device 10 of each. A light distribution characteristic is calculated (step S108). And the 3rd calculating part 34 collates the light distribution characteristic of each illuminating device 10 calculated by step S108 with the light distribution characteristic data D2 which the memory | storage part 35 memorize | stores, and the illuminating device 10 in which the light distribution characteristic is changing. It is determined whether or not there is (step S109). As a result of this determination, when there is a lighting device 10 whose light distribution characteristic has changed (step S109: Yes), the third calculation unit 34 has the light distribution characteristic data D2 corresponding to the light distribution characteristic of the lighting device 10. Is updated (step S110). Thereafter, the process returns to step S101, and the subsequent processing is repeated while a worker exists in the office, and the calculation of the influence coefficient a and the adjustment of each lighting device 10 are performed based on the updated light distribution characteristics. Calculation of the optimum combination of light levels is performed.

  On the other hand, if there is no lighting device 10 whose light distribution characteristics have changed (step S109: No), the process of step S110 is skipped and the process returns to step S101, and while the worker exists in the office, the subsequent processes are performed. Is repeated.

  In the example described above, the light distribution characteristic of the lighting device 10 is calculated in a series of processes for controlling the light control level of the lighting device 10, but the light distribution characteristic of the lighting device 10 is calculated independently. In the case where it is performed, the processing from step S107 to step S110 is performed at a predetermined timing, and when the light distribution characteristic data D2 stored in the storage unit 35 is updated in step S110, based on the updated light distribution characteristic. Thus, the calculation of the influence coefficient a and the calculation of the optimal combination of the dimming levels of the respective lighting devices 10 may be performed.

  As described above in detail with reference to specific examples, according to the lighting system of the present embodiment, the light distribution characteristics of each lighting apparatus 10 in the office are calculated as needed, and the lighting apparatus whose light distribution characteristics have changed. If there is 10, the change in the light distribution characteristic is fed back to recalculate the optimal combination of the dimming levels of each lighting device 10, so that even if some lighting devices 10 deteriorate, The decrease in illuminance due to the illuminating device 10 in which the deterioration has occurred can be appropriately compensated for by the other illuminating devices 10, and the illuminance at the control target position can be brought close to the target illuminance.

(Example)
In order to confirm the effect of the above-described embodiment, the operation of the lighting control device 30 in an actual office environment was simulated by a computer, and the illuminance at the control target position set in the office was measured.

  6A and 6B are diagrams for explaining the conditions of the present embodiment. FIG. 6A is a plan view of the office used in the simulation, and FIG. 6B shows details of the installation positions of the lighting devices L1 to L36 in the office. Show. In this embodiment, the positions i1 to i4 in the office shown in FIG. 6A are set as control target positions. The size of the office shown in FIG. 6A is 9 × 11 m, and the xy coordinates of the lighting devices L1 to L36 on the xy plane with the lower right in FIG. 6A as the origin are shown in FIG. It is described. Each of the lighting devices L1 to L36 is installed on the ceiling of the office, and the height from the floor to the ceiling is 3 m. The heights of the control target positions i1 to i4 are 2.3 m from the ceiling, assuming the height of the head of the worker who is seated.

  FIG. 7 is a diagram illustrating a simulation result before the light distribution characteristics of the lighting devices L1 to L36 are changed, and (a) is obtained as a simulation result when the target illuminance of the control target positions i1 to i4 is set to 400 lx. The combinations of the dimming levels of the respective lighting devices L1 to L36 are shown, and (b) shows the deviation between the illuminance actually measured at the control target positions i1 to i4 and the target illuminance. As a result of lighting the lighting devices L1 to L36 in the office at the dimming level shown in FIG. 7 (a), as shown in FIG. 7 (b), three positions (i1 to i4) among the control target positions i1 to i4. In i3), the target illuminance of 400 lx or more was obtained.

  FIG. 8 is a diagram illustrating a simulation result of a comparative example in which a change in the light distribution characteristic is not fed back to the control. FIG. A combination of levels (same as FIG. 7A) is shown, and FIG. 7B shows a deviation between the illuminance actually measured at the control target positions i1 to i4 and the target illuminance. Here, it is assumed that among the lighting devices L1 to L36 in the office, the light distribution characteristics of the three lighting devices L21, L22, and L23 deteriorate to about half. As a result of lighting the lighting devices L1 to L36 in the office at the dimming level shown in FIG. 8A, as shown in FIG. 8B, among the control target positions i1 to i4, the target illuminance is 400 lx. The above illuminance was obtained only at one location (i2). This is because the change in the light distribution characteristics of the lighting devices L21, L22, and L23 is not reflected in the calculation for calculating the optimal combination of light control levels.

  FIG. 9 is a diagram illustrating a simulation result of an example in which a change in the light distribution characteristic is fed back to the control. FIG. 9A is a simulation in a case where the change in the light distribution characteristic of the lighting devices L21, L22, and L23 is fed back to the control. The combinations of dimming levels of the respective lighting devices L1 to L36 obtained as a result are shown, and (b) shows the deviation between the illuminance actually measured at the control target positions i1 to i4 and the target illuminance. As a result of lighting the lighting devices L1 to L36 in the office at the dimming level shown in FIG. 9A, as shown in FIG. 9B, the three positions (i1 to i4) among the control target positions i1 to i4. In i3), the target illuminance of 400 lx or more was obtained. This is because a decrease in illuminance due to a change in light distribution characteristics of the lighting devices L21, L22, and L23 is appropriately compensated by other lighting devices. From the above results, the effect of the present embodiment was confirmed.

  Each functional component in the lighting control device 30 of the present embodiment described above can be realized by, for example, a program (software) executed using a general-purpose computer system as basic hardware.

  FIG. 10 is a block diagram schematically illustrating an example of the hardware configuration of the illumination control device 30. As shown in FIG. 10, the illumination control device 30 includes a processor 101 such as a CPU, a main storage unit 102 such as a RAM, an auxiliary storage unit 103 using various storage devices, a communication interface 104, and each of these units. Are configured as a general-purpose computer system including a bus 105 for connecting the two. The auxiliary storage unit 103 may be connected to each unit via a wired or wireless LAN (Local Area Network).

  Each functional component of the lighting control device 30 of the present embodiment is realized, for example, when the processor 101 uses the main storage unit 102 to execute a program stored in the auxiliary storage unit 103 or the like. . This program is, for example, a file in an installable or executable format, such as a CD-ROM (Compact Disk Read Only Memory), a flexible disk (FD), a CD-R (Compact Disk Recordable), and a DVD (Digital Versatile Disc). And recorded on a computer-readable recording medium such as a computer program product.

  Further, this program may be stored on another computer connected to a network such as the Internet and provided by being downloaded via the network. The program may be provided or distributed via a network such as the Internet. Further, this program may be provided by being incorporated in advance in a ROM (auxiliary storage unit 103) or the like in the computer.

  This program has a module configuration including functional components (first calculation unit 31, second calculation unit 32, dimming control unit 33, and third calculation unit 34) of the lighting control device 30 of the present embodiment. For example, when the processor 101 reads out and executes a program from the recording medium, each of the above components is loaded on the main storage unit 102, and each of the above components is generated on the main storage unit 102. It is like that. Note that the functional components of the lighting control device 30 of the present embodiment are partially or wholly used by using dedicated hardware such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array). It can also be realized.

  Although specific embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments as they are, and various modifications and changes are made without departing from the scope of the invention in the implementation stage. It can be embodied.

DESCRIPTION OF SYMBOLS 10 Lighting apparatus 20 Illuminance sensor 30 Illumination control apparatus 31 1st calculating part 32 2nd calculating part 33 Dimming control part 34 3rd calculating part 35 Memory | storage part 40 WSS

JP 2012-054031 A (paragraphs 0048 to 0051)

Claims (9)

A lighting control device for integrated control of a plurality of lighting devices distributed in a predetermined area,
A first calculation unit that calculates an influence coefficient representing an influence degree of the lighting device with respect to illuminance at a control target position in the predetermined region, based on a light distribution characteristic of the lighting device;
A second calculation unit that calculates an optimal combination of dimming levels of each lighting device for bringing the illuminance at the control target position close to the target illuminance, based on the influence coefficient calculated for each of the plurality of lighting devices; ,
A dimming control unit for controlling the dimming level of each of the plurality of lighting devices according to the calculation result of the second calculation unit;
A third calculation unit that calculates the light distribution characteristics of the lighting device based on a measurement result of an illuminance measuring device that measures the illuminance in the vicinity of the lighting device;
When the light distribution characteristic calculated by the third calculation unit changes, the first calculation unit recalculates the influence coefficient based on the changed light distribution characteristic, and the second calculation unit The lighting control device recalculates the optimal combination based on the recalculated influence coefficient.   The lighting control device according to claim 1, wherein the third calculation unit calculates the light distribution characteristic of the lighting device after a dimming level is controlled by the dimming control unit.   The lighting control device according to claim 1, wherein the third calculation unit calculates the light distribution characteristic of the lighting device at a predetermined timing.   The said 1st calculating part acquires the positional information on the person in the said predetermined area, and makes the position where a person exists into the said control object position, The Claim 1 characterized by the above-mentioned. Lighting control device.   The said 2nd calculating part acquires the attitude | position information which shows the attitude | position of the person who exists in the said control object position, and determines the target illumination intensity of the said control object position based on the said attitude information. The lighting control device described in 1.   The second calculation unit calculates an optimal combination of dimming levels of each lighting device so that the illuminance at the control target position approaches the target illuminance and the total power consumption of each lighting device is reduced. The illumination control device according to any one of claims 1 to 5. The lighting control device according to any one of claims 1 to 6,
A plurality of lighting devices distributed in the predetermined area;
An illumination system comprising: an illuminance measuring device that measures the illuminance in the vicinity of the illumination device. A method executed in a lighting control apparatus that integrally controls a plurality of lighting devices distributed in a predetermined area,
A first computing unit calculating an influence coefficient representing an influence degree of the lighting device with respect to illuminance at a control target position in the predetermined area based on a light distribution characteristic of the lighting device;
Based on the influence coefficient calculated for each of the plurality of lighting devices, the second calculation unit calculates an optimal combination of dimming levels of the lighting devices to bring the illuminance at the control target position closer to the target illuminance. And steps to
A dimming control unit controlling a dimming level of each of the plurality of lighting devices according to a calculation result of the second calculation unit;
A third calculating unit calculating the light distribution characteristic of the lighting device based on a measurement result of an illuminance measuring device that measures the illuminance in the vicinity of the lighting device;
When the light distribution characteristic calculated by the third calculation unit changes, the first calculation unit recalculates the influence coefficient based on the changed light distribution characteristic, and the second calculation unit A lighting control method, wherein the optimal combination is recalculated based on the recalculated influence coefficient. To a computer that integrally controls a plurality of lighting devices distributed in a predetermined area,
A function of a first calculation unit that calculates an influence coefficient representing an influence degree of the lighting device with respect to illuminance at a control target position in the predetermined area, based on a light distribution characteristic of the lighting device;
A second calculation unit that calculates an optimal combination of dimming levels of the respective lighting devices to bring the illuminance at the control target position closer to the target illuminance, based on the influence coefficient calculated for each of the plurality of the lighting devices. Function and
A function of a dimming control unit that controls a dimming level of each of the plurality of lighting devices according to a calculation result of the second calculation unit;
Based on the measurement result of the illuminance measuring instrument that measures the illuminance in the vicinity of the lighting device, the function of the third calculation unit that calculates the light distribution characteristics of the lighting device,
When the light distribution characteristic calculated by the third calculation unit changes, the first calculation unit recalculates the influence coefficient based on the changed light distribution characteristic, and the second calculation unit A program for recalculating the optimum combination based on the recalculated influence coefficient.