JP6548165B2 - Lighting control device and lighting system - Google Patents

Description

  The present invention relates to a lighting control device and a lighting system.

  Conventionally, the brightness (light control rate) of the lighting device is adjusted so that the brightness of the illumination area of the lighting device detected by the brightness sensor installed near the lighting device and linked to the lighting device becomes the target brightness Lighting control devices are known. Specifically, the lighting control device periodically receives information indicating the current brightness from the brightness sensor to determine whether the current brightness is the target brightness, When the information indicating the brightness is received, the light control rate of the lighting apparatus is controlled by a constant amount to make the brightness of the illumination area the target brightness. Patent Document 1 describes a technique related to such a lighting control device.

Japanese Patent Application Laid-Open No. 10-270177

  By the way, one lighting control device receives information indicating the current brightness from each of a plurality of (for example, 100 or the like) brightness sensors, and adjusts the tone of the lighting fixture associated with each of the plurality of brightness sensors. It is conceivable to control the light rate. In this case, since the illumination control device receives the information indicating the brightness in order from each of the plurality of brightness sensors, the reception interval for receiving the information indicating the brightness from one brightness sensor becomes long. When the illumination control device receives information indicating brightness from one brightness sensor, the reception interval is, for example, 0.5 seconds, while information indicating brightness is received from the plurality of brightness sensors. When doing this, it is conceivable that the reception interval is, for example, an interval of 5 seconds. The illumination control device changes the dimming rate of the illumination fixture linked to the brightness sensor by a fixed amount when receiving the information indicating brightness, for example, when the reception interval of the information indicating brightness is 5 seconds The timing to change the light control rate of the luminaire will be every 5 seconds. For example, in the case where the amount of change in the light control rate, which is changed by a fixed amount each time information indicating brightness is 0.5%, the lighting control device controls the light control rate of the lighting fixture when there is one brightness sensor. The brightness of the illumination area can be immediately set to the target brightness because it is changed by 0.5% every 0.5 seconds. However, when there are multiple brightness sensors, the lighting control device changes the dimming rate of the lighting fixture by 0.5% every 5 seconds, so it takes time to set the brightness of the lighting area to the target brightness. It will hang.

  On the other hand, if it is known in advance that the reception interval is, for example, 5 seconds, the amount of change in the dimming rate is determined in advance as the amount of change (for example, 5%) corresponding to the 5 seconds interval. It can be considered that it does not take time to set the brightness to the target brightness. However, depending on the communication environment between the lighting control device and the brightness sensor, the reception interval may vary. In addition, the number of installed brightness sensors differs depending on the user's use environment (the number of rooms, the size of the room, etc.), and the reception interval is different for each use environment. It is difficult to determine the rate of change.

  Therefore, an object of the present invention is to provide a lighting control device and a lighting system capable of suppressing a time required for setting the brightness of a lighting area to a target brightness.

  A lighting control apparatus according to an aspect of the present invention is a light control rate of a lighting fixture associated with a plurality of brightness sensors such that the brightness detected by the plurality of brightness sensors is a predetermined brightness. An illumination control device for controlling the reception of the plurality of brightness sensors, the reception unit receiving the value indicating the brightness repeatedly transmitted, and the reception interval of the value indicating the brightness repeatedly received by the reception unit A measurement unit to measure, a determination unit to determine the change amount of the light control rate of the lighting fixture as a larger value as the reception interval measured by the measurement unit is longer, and a value indicating the brightness received by the reception unit And a control unit configured to control the light control rate of the luminaire associated with the transmitted brightness sensor in accordance with the value indicating the brightness and the change amount of the light control rate determined by the determination unit.

  A lighting system according to an aspect of the present invention includes the above-described lighting control device, the plurality of brightness sensors, and the lighting fixture.

  According to the illumination control device and the illumination system according to one aspect of the present invention, it is possible to suppress the time taken to set the brightness of the illumination area to the target brightness.

FIG. 1 is a diagram for explaining a conventional lighting control device. FIG. 2: is a block diagram which shows an example of the illumination system which concerns on embodiment. FIG. 3 is a flowchart showing an example of the operation of the illumination control device according to the embodiment. FIG. 4 is a diagram for explaining the operation of the lighting control device according to the embodiment. FIG. 5 is a diagram showing an example in which the dimming rate of the lighting apparatus can not be controlled to the dimming rate equivalent to the target value. FIG. 6 is a diagram for explaining an operation of the illumination control device according to the embodiment when the difference between the target value and the value indicating the current brightness is larger or smaller than a predetermined value. FIG. 7 is a diagram for describing an operation of the illumination control device according to the embodiment to fade the change amount of the light control rate at a time based on the reception interval. FIG. 8 is a diagram for describing an operation of fading the color temperature of the illumination control device according to the embodiment.

(Findings that formed the basis of the invention)
Hereafter, the knowledge which became the basis of this invention is demonstrated using FIG.

  FIG. 1 is a diagram for explaining a conventional lighting control device.

  The conventional illumination control device periodically receives information indicating the current brightness from the brightness sensor to determine whether the brightness of the current illumination area is the target brightness, and the target Control the dimming rate of the luminaire until it reaches the desired brightness. The dimming rate of 70% corresponding to the target value shown in FIG. 1 indicates the dimming rate when the brightness of the illumination area illuminated by the lighting apparatus reaches the target brightness. In actuality, the lighting control device changes the light control rate of the lighting fixture by a fixed amount, and the light control rate equivalent to the target value is achieved only when the brightness of the lighting area reaches the target brightness. Recognize. For example, it is conceivable to associate the light control rate of the lighting apparatus with the brightness of the illumination area in advance, and to set the light control rate to a predetermined value when it is desired to obtain a predetermined brightness. However, in general, outside lighting often enters outside light unless it is underground, etc. Therefore, depending on cloudy days, sunny days, time zones, etc., even if the lighting equipment is controlled to the same dimming rate, it is the same. It does not become bright. Therefore, the dimming rate corresponding to the target value is shown here for the sake of explanation. Moreover, 60% of light control rates show the light control rate of the lighting fixture for a certain time (present).

  The conventional illumination control device is configured to use the illumination area of the illumination fixture linked to the predetermined brightness sensor according to the information indicating the brightness received from one predetermined brightness sensor among the plurality of brightness sensors. It is assumed that the brightness is determined to be darker than the target brightness, and the light control rate is increased by a fixed amount (for example, 0.5%) to 60%. Then, the conventional illumination control device again receives information indicating the current brightness from the predetermined brightness sensor to determine whether the brightness of the current illumination area is the target brightness or not. to decide.

  3s, 4s, and 1s shown in FIG. 1 indicate reception intervals at which the conventional lighting control device repeatedly receives information indicating brightness from a predetermined brightness sensor among the plurality of brightness sensors. When receiving information indicating brightness from each of the plurality of brightness sensors, it is difficult to receive the information at the same time, so it is necessary to sequentially receive the information from each of the plurality of brightness sensors. Therefore, the reception interval for receiving information from the predetermined brightness sensor is long, for example, 4 seconds. Therefore, when the conventional illumination control device receives information indicating brightness from the plurality of brightness sensors, the brightness of the illumination area is changed because the dimming rate is only changed, for example, by 0.5% at each long reception interval. It takes time to achieve the target brightness.

  On the other hand, when the reception interval is long, it is conceivable to set the brightness of the illumination area as the target without increasing time by increasing the change amount of the light control rate. However, if the communication environment between the lighting control device and the plurality of brightness sensors is unstable, the reception intervals may vary as shown in FIG. If the reception interval is fixed, the amount of change in the dimming rate can be determined in advance as a large value, but since the reception interval may vary, it is difficult to determine the amount of change in the dimming rate in advance. .

  Therefore, the present invention provides a lighting control device and a lighting system capable of suppressing the time taken to set the brightness of a lighting area to a target brightness.

  Hereinafter, a lighting control device and a lighting system according to an embodiment of the present invention will be described in detail using the drawings. Each of the embodiments described below shows a preferable specific example of the present invention. Therefore, the numerical values, the constituent elements, the arrangement and connection form of the constituent elements, the steps, the order of the steps, and the like described in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components that are not described in the independent claims indicating the highest concept of the present invention are described as optional components.

  Further, each drawing is a schematic view, and is not necessarily illustrated exactly. Moreover, in each figure, the same code | symbol is attached | subjected about the same structural member.

Embodiment
Hereinafter, embodiments will be described with reference to FIGS. 2 to 8.

[Configuration of lighting system]
FIG. 2: is a block diagram which shows an example of the illumination system 1 which concerns on embodiment.

  The lighting system 1 includes a lighting control device 10, a brightness sensor 20, and a lighting fixture 30. In the lighting system 1, the lighting control device 10 controls the plurality of brightness sensors 20 and the plurality of lighting fixtures 30. The illumination control device 10 receives, from the plurality of brightness sensors 20, values (for example, illuminance values) indicating the brightness detected by the plurality of brightness sensors 20. In addition, the lighting control device 10 controls the dimming rates of the plurality of lighting fixtures 30. Here, each of the plurality of brightness sensors 20 is referred to as a brightness sensor 21, 22, 23. Moreover, let each of the some lighting fixtures 30 be lighting fixtures 31a, 31b, 31c, 32a, 32b, 32c, 33a, 33b, and 33c.

  For example, the plurality of brightness sensors 20 and the plurality of lighting fixtures 30 are installed in different rooms. Specifically, for example, the brightness sensor 21 is installed in the room A, the brightness sensor 22 is installed in the room B, and the brightness sensor 23 is installed in the room C. The lighting devices 31a, 31b and 31c are installed in the room A, the lighting devices 32a, 32b and 32c are installed in the room B, and the lighting devices 33a, 33b and 33c are installed in the room C. And the brightness sensor 21 detects the brightness of the illumination area (room A) illuminated by the lighting fixtures 31a, 31b, 31c. Similarly, the brightness sensor 22 detects the brightness of the illumination area (room B) illuminated by the lighting fixtures 32a, 32b, 32c, and the brightness sensor 23 is illuminated by the lighting fixtures 33a, 33b, 33c. The brightness of the illumination area (room C) is detected. The lighting control device 10 controls the brightness sensor 21 and the lighting fixtures 31a, 31b, and 31c to control the light control rate of the lighting fixtures 31a, 31b, and 31c according to the brightness detected by the brightness sensor 21. It is linked and managed. Similarly, the lighting control device 10 links the brightness sensor 22 with the lighting devices 32a, 32b, 32c, and links the brightness sensor 23 with the lighting devices 33a, 33b, 33c for management. The dotted lines shown in FIG. 1 show the brightness sensor 20 and the luminaire 30 linked in this way. Note that the plurality of brightness sensors 20 and the plurality of lighting fixtures 30 may be installed, for example, in each predetermined area divided in one room.

  In addition, the plurality of brightness sensors 20 may be at least two. That is, there may be two (for example, four or more). At least one lighting fixture 30 may be associated with each of the plurality of brightness sensors 20, or four or more lighting fixtures 30 may be provided.

  The lighting control device 10 controls the light control rate of the lighting fixture 30 linked to the plurality of brightness sensors 20 such that the brightness detected by the plurality of brightness sensors 20 is a predetermined brightness. The predetermined brightness is the target brightness. For example, the lighting control device 10 controls the dimming rate of the lighting fixture 30 such that the lighting area has a predetermined brightness according to the schedule. For example, when the target brightness becomes brighter (darker) than the current brightness at the turn of the schedule, the lighting control device 10 increases (decreases) the light control rate of the lighting device 30. The predetermined brightness may be predetermined for each of the linked brightness sensor 20 and the lighting device 30. For example, in a certain time zone, the target brightness may be predetermined as 500 lx in the room A and 600 lx in the room B, respectively.

  The illumination control device 10 includes a receiving unit 11, a measuring unit 12, a determining unit 13, and a control unit 14.

  The receiving unit 11 receives a value indicating the brightness that each of the plurality of brightness sensors 20 repeatedly transmits. Since the receiving unit 11 sequentially receives values indicating brightness from each of the plurality of brightness sensors 20, when the number of the plurality of brightness sensors 20 increases, one of the plurality of brightness sensors 20 is present. The reception interval of the value indicating the brightness from one brightness sensor 20 becomes long. The receiver 11 communicates with, for example, the plurality of brightness sensors 20 by wireless. Therefore, when the communication environment between the reception unit 11 and the plurality of brightness sensors 20 is unstable, the reception intervals may vary.

  The measurement unit 12 measures a reception interval of a value indicating brightness repeatedly received by the reception unit 11. The measurement unit 12 measures the reception intervals of the values indicating the brightness from each of the plurality of brightness sensors 20, and stores the reception intervals measured for each of the plurality of brightness sensors 20 in, for example, the illumination control apparatus 10. (Not shown).

  The determination unit 13 determines the change amount of the light control rate of the lighting device 30 to be a larger value as the reception interval measured by the measurement unit 12 is longer. The change amount of the light control rate is the change amount from the current light control rate of the lighting device 30 when the control unit 14 described later instructs the lighting device 30 to perform light control. For example, when the control unit 14 determines that the light control rate of the luminaire 30 is to be increased or decreased, the change amount of the light control rate is 60% when the current light control rate of the luminaire 30 is 60%. Is the amount of change from When the determination unit 13 determines, for example, 3% as the change amount of the light control rate, the light control rate of the lighting device 30 is controlled to 60% to 63% or 57%.

  The control unit 14 determines the light control rate of the luminaire 30 linked to the brightness sensor 20 that has transmitted the value indicating the brightness received by the receiving unit 11 as the value indicating the brightness and the determination unit 13 Control is performed according to the amount of change in the light control rate. When the receiving unit 11 receives the value indicating the brightness from the brightness sensor 20, the control unit 14 controls the light control rate of the lighting fixture 30 according to the value indicating the brightness received from the brightness sensor 20. For example, when the control unit 14 receives a value indicating brightness from the brightness sensor 21, the control unit 14 detects the light control rate of the lighting fixtures 31 a, 31 b, and 31 c linked to the brightness sensor 21. Control according to the result. Specifically, the control unit 14 determines whether or not the value indicating the brightness received by the receiving unit 11 from the brightness sensor 21 is a target value (for example, illuminance value) indicating a predetermined brightness. To judge. When the value indicating the brightness received by the receiving unit 11 is not the target value, the control unit 14 instructs the lighting fixtures 31a, 31b, and 31c linked to the brightness sensor 21 to perform light control. When the control unit 14 instructs the lighting fixtures 31a, 31b, and 31c to perform light control, the change amount of the light control rate becomes the change amount of the light control rate determined by the determination unit 13. In this manner, the control unit 14 controls the lighting device 30 to control light each time the receiving unit 11 receives a value indicating the brightness until the brightness detected by the brightness sensor 20 becomes a predetermined brightness. Give a dimming instruction to change the rate. Thereby, the brightness of the illumination area of the lighting fixture 30 can be set to a predetermined brightness. The control unit 14 has, for example, a communication unit (not shown), and communicates with the lighting fixture 30 in a wired or wireless manner.

  Further, the control unit 14 further controls the color temperature of the lighting device 30. The control unit 14 controls, for example, the color temperature of the lighting device 30 to a predetermined color temperature according to the schedule. The predetermined color temperature is a target color temperature. For example, when the target color temperature is high (low) at the turn of the schedule, the control unit 14 makes the color temperature of the lighting fixture 30 high (low).

  The brightness sensor 20 is a sensor that detects the brightness of the illumination area of the associated lighting fixture 30. For example, when the illumination area is an area where external light enters, the brightness sensor 20 detects the brightness of the light output from the lighting device 30 and the external light. The brightness sensor 20 repeatedly transmits a value indicating the detected brightness to the illumination control device 10 (the receiving unit 11). The brightness sensor 20 is, for example, a sensor configured of a phototransistor or a photodiode.

  The lighting fixture 30 is a lighting fixture capable of dimming and adjusting the light to be output. In the lighting device 30, the light output of the light source included in the lighting device 30 is adjusted by the control unit 14 to change the light control rate to perform light control. In addition, the lighting fixture 30 includes a plurality of light sources with different color temperatures, which are configured of, for example, a blue LED and a yellow phosphor, and the ratio of the light output of each light source is adjusted to the control unit 14. Toning is performed by changing the color temperature of the light to be output. In addition, the lighting fixture 30 may be provided with the light source comprised with red LED, green LED, and blue LED, for example, and the lighting fixture 30 is adjusted by adjusting the ratio of the light output of red LED, green LED, and blue LED. Toning may be performed by changing the color temperature of the light output by Moreover, the lighting fixture 30 may be provided with multiple light sources comprised with near-ultraviolet LED and RGB fluorescent substance, for example, and the ratio of the light output of each light source is adjusted, and the light of the lighting fixture 30 outputs Toning may be performed by changing the color temperature. That is, the lighting fixture 30 should just be a lighting fixture which can change color temperature.

[Operation of lighting control device]
Next, the operation of the lighting control device 10 will be described.

  FIG. 3 is a flowchart showing an example of the operation of the illumination control device 10 according to the embodiment.

  First, the receiving unit 11 receives a value indicating the brightness repeatedly transmitted by the plurality of brightness sensors 20 (step S11).

  Next, the measurement unit 12 measures the reception interval of the value indicating the brightness received by the reception unit 11 (step S12). The measuring unit 12 measures a time from when the receiving unit 11 receives a value indicating brightness to when receiving a value indicating brightness next.

  Next, the determination unit 13 determines the change amount of the light control rate of the lighting device 30 to be a larger value as the reception interval measured by the measurement unit 12 is longer (step S13).

  Then, the control unit 14 controls the light control rate of the luminaire 30 linked to the brightness sensor 20 that has transmitted the value indicating the brightness received by the receiving unit 11, the value indicating the brightness, and the determination unit 13 Control is performed according to the determined change amount of the light control rate (step S14). Specifically, as described above, when the value indicating the brightness received by the receiving unit 11 does not become the target value, as described above, the lighting device 30 linked to the brightness sensor 20 A light control instruction is issued based on the change amount of the light control rate determined by the determination unit 13.

  Here, a specific example of the operation of the illumination control device 10 will be described with reference to FIG.

  FIG. 4 is a diagram for explaining the operation of the illumination control device 10 according to the embodiment.

  The dimming rate of 70% corresponding to the target value shown in FIG. 4 indicates the dimming rate when the brightness of the illumination area illuminated by the lighting device 30 becomes the target brightness. As described above, in practice, the lighting control apparatus 10 changes the light control rate of the lighting device 30, and when the brightness of the lighting area reaches the target brightness, it corresponds to the target value for the first time. Although the dimming rate can be known, the dimming rate corresponding to the target value is shown here for the sake of explanation. The dimming rates corresponding to the target values shown in FIG. 5 to FIG. 8 described later are also shown for the explanation of the present invention. Moreover, 60% of light control rates show the light control rate of the lighting fixture 30 of a certain time (time 0 shown by FIG. 4).

  The receiving unit 11 receives a value indicating brightness from the brightness sensor 20 (for example, the brightness sensor 21) at a certain time (time 0 shown in FIG. 4), and then indicates brightness again from the brightness sensor 21. Receive a value. At this time, since the measurement unit 12 measures the reception interval of the value indicating the brightness received by the reception unit 11, the reception unit 11 receives the value indicating the brightness last time until the current reception Measure the interval as 3 seconds. When the value indicating the brightness received by the receiving unit 11 this time (three seconds after a certain time) is smaller than the target value, the control unit 14 determines to increase the dimming rate of the lighting device 30. At this time, the conventional lighting control device instructs the light control to increase the light control rate of the lighting device 30 by a predetermined fixed amount (for example, 0.5%). However, the control unit 14 of the present invention increases the change amount of the light control rate determined by the determination unit 13 without instructing the light control to increase the light control rate of the lighting fixture 30 by a predetermined fixed amount.

  The determination unit 13 determines the change amount of the light control rate of the lighting device 30 according to the reception interval of 3 seconds measured by the measurement unit 12. The determination unit 13 determines, for example, the amount of change in the dimming rate so that the reception interval and the amount of change in the dimming rate have a positive correlation. That is, the determination unit 13 determines the change amount of the light control rate of the lighting device 30 to be a larger value as the reception interval measured by the measurement unit 12 is longer. The determination unit 13 determines, for example, the amount of change in the dimming rate such that the amount of change in the dimming rate per second of the reception interval is 1%. Thereby, the determination unit 13 determines the change amount of the dimming ratio to be 3% in accordance with the reception interval of 3 seconds measured by the measurement unit 12. The control unit 14 increases the light control rate of the lighting device 30 by 3% of the change rate of the light control rate determined by the determination unit 13.

  Then, the receiving unit 11 receives the value indicating the brightness again from the brightness sensor 20. When the value indicating brightness is not the target value, the control unit 14 determines the dimming rate of the lighting fixture 30 according to the reception interval of 4 seconds measured by the measurement unit 12 4 Increase by%.

  As described above, as the length of the reception interval is longer, the dimming rate of the lighting device 30 can be largely changed. However, when the dimming ratio of the luminaire 30 is largely changed as the length of the reception interval is longer, it may not be possible to control the dimming ratio of the luminaire 30 to the dimming ratio equivalent to the target value. Here, the case where the light control rate of the lighting fixture 30 can not be controlled to the light control rate equivalent to the target value will be described using FIG.

  FIG. 5 is a diagram showing an example in the case where the light control rate of the lighting device 30 can not be controlled to the light control rate equivalent to the target value.

  As shown in FIG. 5, it is assumed that the dimming rate of the luminaire 30 at a certain time (time 0 shown in FIG. 5) is 68%.

  The receiving unit 11 receives the value indicating the brightness from the brightness sensor 20 at a certain time (time 0 shown in FIG. 5), and then receives the value indicating the brightness from the brightness sensor 20 again. At this time, since the measurement unit 12 measures the reception interval of the value indicating the brightness received by the reception unit 11, the reception unit 11 receives the value indicating the brightness last time until the current reception Measure the interval as 4 seconds. When the value indicating the brightness received by the receiving unit 11 this time (four seconds after a certain time) is smaller than the target value, the control unit 14 determines that the light control rate of the lighting fixture 30 is to be increased. The control unit 14 increases the light control rate of the lighting fixture 30 by 4% of the change rate of the light control rate determined by the determination unit 13.

  Since the control unit 14 increases the light control rate of the lighting device 30 from 68% to 4% to 72%, the light control rate of the lighting device 30 exceeds 70% of the light control rate corresponding to the target value. Thereafter, when the receiving unit 11 receives the value indicating brightness again from the brightness sensor 20, the control unit 14 finds that the value indicating the current brightness is larger than the target value. At this time, since the measurement unit 12 measures the reception interval as 5 seconds, the control unit 14 reduces the light control rate of the lighting device 30 by 5% of the change rate of the light control rate determined by the determination unit 13. . As described above, when the light control rate of the lighting device 30 is largely changed as the reception interval is always longer, the light control rate of the lighting device 30 may not be controlled to the light control rate equivalent to the target value. Then, the method to control the light control rate of the lighting fixture 30 to the light control rate equivalent to a target value is demonstrated using FIG.

  FIG. 6 is a diagram for describing an operation of the illumination control device 10 according to the embodiment when the difference between the target value and the value indicating the current brightness is larger or smaller than a predetermined value. .

  The predetermined value is, for example, an illuminance value of 5% of the target value, and when the target value is 500 lx, the predetermined value is 25 lx. Here, a value obtained by subtracting a predetermined value from the target value is set as a threshold (475 lx), and a dimming ratio equivalent to the threshold is set to 65%. As in the case of the light control rate corresponding to the target value described above, in practice, the control unit 14 changes the light control rate of the lighting device 30, and when the brightness of the illumination area reaches a threshold (or exceeds It can be seen that the light control rate of the lighting apparatus 30 is (or can be understood to be) the light control rate equivalent to the threshold for the first time, but here the light control rate equivalent to the threshold is shown for the purpose of explanation. .

  In FIG.4 and FIG.5, the determination part 13 determined the variation | change_quantity of the light control rate of the lighting fixture 30 as a large value, so that a reception space | interval is long. In FIG. 6, when the difference between the target value and the value indicating the brightness received by the receiving unit 11 is larger than a predetermined value, the determining unit 13 determines that the light control rate of the lighting device 30 is longer as the reception interval is longer. The amount of change of is determined to be a large value. On the other hand, when the difference between the target value and the value indicating the brightness received by the receiving unit 11 is smaller than a predetermined value, the determining unit 13 determines in advance the amount of change in the light control rate of the lighting device 30. Value. In other words, when the value indicating the current brightness is smaller than the target value, the value indicating the current brightness is smaller than the threshold (the difference between the target value and the value indicating the current brightness is a predetermined value) When the reception interval is longer, the determination unit 13 determines the amount of change in the dimming rate of the lighting device 30 to be a larger value. Further, when the value indicating the current brightness is smaller than the target value, the value indicating the current brightness is larger than the threshold (the difference between the target value and the value indicating the current brightness is larger than a predetermined value) Also, in the case of (small), the determination unit 13 determines the change amount of the light control rate of the lighting fixture 30 to a predetermined value (for example, 0.5%).

  The receiving unit 11 receives the value indicating the brightness from the brightness sensor 20 at a certain time (time 0 shown in FIG. 6), and then receives the value indicating the brightness from the brightness sensor 20 again. At this time, since the measurement unit 12 measures the reception interval of the value indicating the brightness received by the reception unit 11, the reception unit 11 receives the value indicating the brightness last time until the current reception Measure the interval as 3 seconds. When the value indicating the brightness received by the receiving unit 11 this time (three seconds after a certain time) is smaller than the target value, the control unit 14 determines to increase the dimming rate of the lighting device 30. Furthermore, the determination unit 13 determines whether the difference between the target value and the value indicating the current brightness received by the reception unit 11 is larger than a predetermined value. For example, in the case where the value indicating the brightness when the light control rate of the lighting fixture 30 is 60% is 450 lx, the difference between the target value (500 lx) and the value indicating the current brightness (450 lx) is 50 lx. Greater than (25 lx). In other words, the current brightness value (450 lx) is smaller than the threshold (475 lx). Therefore, the determination unit 13 determines that the difference between the target value and the value indicating the current brightness received by the reception unit 11 is larger than the predetermined value, and the change in the dimming rate according to the reception interval of 3 seconds. Determine the amount to 3%. Then, the control unit 14 increases the light control rate of the lighting device 30 by 3% of the change rate of the light control rate determined by the determination unit 13.

  Next, when the receiving unit 11 again receives a value indicating brightness from the brightness sensor 20 (six seconds after a certain time), the value indicating the brightness is smaller than the threshold. The change rate of the light control rate is increased by 3%, which is determined by the determination unit 13.

  Next, the value indicating the brightness when the receiving unit 11 receives the value indicating the brightness again from the brightness sensor 20 (7 seconds after a certain time) is set to 480 lx. At this time, the difference between the target value (500 lx) and the value (480 lx) indicating the current brightness is 20 lx, which is smaller than the predetermined value (25 lx). In other words, the current brightness value (480 lx) is greater than the threshold (475 lx). Therefore, the determination unit 13 determines that the difference between the target value and the value indicating the current brightness received by the reception unit 11 is smaller than a predetermined value, and the change amount of the dimming rate is determined in advance. (For example, 0.5%) Then, the control unit 14 increases the light control rate of the lighting device 30 by 0.5% of the change rate of the light control rate determined by the determination unit 13.

  As described above, when the value indicating the brightness received by the receiving unit 11 becomes a value close to the target value, the amount of change in the light control rate is determined to a predetermined value (small value). It is suppressed that the rate is greatly changed and exceeds the target value. Therefore, the dimming rate of the lighting fixture 30 can be controlled to the target value.

  By the way, as FIG.4 and FIG.6 etc. show, the light control rate of the lighting fixture 30 is changing in steps shape with respect to time, and the brightness of the light which the lighting fixture 30 outputs to a user is Sometimes it changes to fly and feels unnatural. Therefore, the lighting control device 10 may fade the dimming rate of the lighting device 30. Here, an operation in which the lighting control device 10 causes the light control rate of the lighting fixture 30 to fade will be described using FIG. 7.

  FIG. 7 is a diagram for describing an operation of the illumination control device 10 according to the embodiment for causing the change amount of the light control rate to fade at a time based on the reception interval.

  When the reception interval measured by the measurement unit 12 is 3 seconds, the determination unit 13 determines the change amount of the light control rate of the lighting fixture 30 as 3% according to the reception interval 3 seconds. In FIG. 4, after 3 seconds from a certain time (time 0 shown in FIG. 4), the control unit 14 changes the dimming rate of the lighting fixture 30 by 3% of the change rate of the dimming rate determined by the determining unit 13. . On the other hand, in FIG. 7, when the reception interval between reception at time 0 and the reception before that shown in FIG. 7 is 3 seconds, the control unit 14 determines the change amount of the dimming rate determined by the determination unit 13 The dimming rate of the luminaire 30 is controlled by fading 3% minutes from time 0 by a time based on the reception interval of 3 seconds. Here, for example, the control unit 14 causes the light control rate of the lighting device 30 to fade over a period of 0 to 3 seconds by the change amount 3% determined by the determination unit 13. As described above, the control unit 14 fades the light control rate of the lighting device 30 after the reception unit 11 receives the value indicating the brightness.

  Further, as described above, the lighting control device 10 controls the dimming rate or the color temperature of the lighting device 30 according to the schedule. For example, the lighting control apparatus 10 may control the dimming rate of the lighting fixture 30 and the color temperature in parallel at the turn of the schedule. Here, an operation in which the lighting control device 10 causes the color temperature of the lighting fixture 30 to fade will be described with reference to FIG.

  FIG. 8 is a diagram for describing an operation of fading the color temperature of the illumination control device 10 according to the embodiment.

  The data indicating the change in light control rate shown in FIG. 8 is the same as that in FIG. As shown in FIG. 8, when controlling the dimming rate of the lighting device 30, the lighting control device 10 (control unit 14) simultaneously controls the color temperature. For example, the target color temperature is 4500 K, and the current color temperature is 3000 K. At this time, the control unit 14 causes the color temperature of the lighting fixture 30 to fade for a desired time (for example, 10 seconds). In addition, for example, when the control unit 14 fades the light control rate of the lighting fixture 30, the light control unit 14 performs the illumination with the fade time to fade the color temperature, which is a time different from the fade time to fade the light control rate. The color temperature of the fixture 30 is faded. That is, the control unit 14 can fade the color temperature of the luminaire 30 regardless of the fade time of the light control rate of the luminaire 30. Thus, when controlling the dimming rate of the lighting device 30, the control unit 14 causes the color temperature of the lighting device 30 to fade with a fade time for the color temperature.

[Effects, etc.]
One lighting control device receives information indicating the current brightness from each of a plurality of (for example, 100) brightness sensors, and the dimming rate of the lighting fixture associated with each of the plurality of brightness sensors It is possible to control the situation. In this case, since the lighting control device receives the brightness from the plurality of brightness sensors in order, it takes time to change the light control rate of the lighting device.

  Therefore, in the illumination control device 10 according to the present embodiment, the illumination fixture 30 linked to the plurality of brightness sensors 20 such that the brightness detected by the plurality of brightness sensors 20 is a predetermined brightness. It is a lighting control device which controls the dimming rate of. The illumination control device 10 measures the reception interval of the value indicating the brightness repeatedly received by the receiving unit 11 receiving the value indicating the brightness repeatedly transmitted by each of the plurality of brightness sensors 20, and the measurement And a unit 12. In addition, the illumination control device 10 indicates the brightness received by the reception unit 11 and the determination unit 13 that determines the change amount of the light control rate of the lighting device 30 as a larger value as the reception interval measured by the measurement unit 12 is longer. And a control unit 14 that controls the light control rate of the lighting fixture 30 linked to the brightness sensor 20 that has transmitted the value according to the value indicating the brightness and the change amount of the light control rate determined by the determination unit 13 Equipped with

  In addition, the lighting system 1 according to the present embodiment includes the lighting control device 10, the plurality of brightness sensors 20, and the lighting fixture 30.

  Thereby, since the change amount of the light control rate of the lighting fixture 30 is determined to be a larger value as the reception interval measured by the measurement unit 12 is longer, the time taken to set the brightness of the illumination area to the target brightness It can be suppressed. Also, for example, by setting the change amount of the light control rate of the luminaire 30 to a proportional value (for example, 1% per second) with respect to the reception interval, the speed at which the light control rate of the luminaire 30 changes changes can do.

  In addition, when the difference between the target value, which is a value indicating the predetermined brightness, and the value indicating the brightness received by the receiving unit 11 is larger than a predetermined value, the determining unit 13 has a long reception interval. The change amount of the light control rate of the lighting fixture 30 is determined to be a large value. On the other hand, when the difference between the target value and the value indicating the brightness received by the receiving unit 11 is smaller than a predetermined value, the determining unit 13 determines in advance the change amount of the light control rate of the lighting device 30. Decide on.

  Thereby, when the target brightness and the current brightness are close, the change amount of the light control rate of the lighting fixture 30 becomes a predetermined small value (0.5% or the like). Therefore, it is possible to suppress that the target brightness can not be controlled indefinitely because it exceeds or falls below the target brightness.

  In addition, the control unit 14 fades the change amount of the light control rate at a time based on the reception interval to control the light control rate of the lighting device 30.

  As a result, it is possible to suppress that the brightness of the light output from the lighting device 30 changes to fly and the user feels unnatural.

  Further, when controlling the dimming rate of the lighting device 30, the control unit 14 causes the color temperature of the lighting device 30 to fade at a desired time.

  Thereby, in parallel with control of the light control rate of the lighting fixture 30, the color temperature can be smoothly changed in a desired time.

(Other embodiments)
As mentioned above, although the illumination control apparatus 10 and the illumination system 1 which concern on embodiment were demonstrated, this invention is not limited to the said embodiment.

  For example, in the above-mentioned embodiment, although receiving part 11 received the value which shows brightness from a plurality of brightness sensors 20, it does not restrict to this. For example, the receiving unit 11 may be a communication unit capable of transmission and reception, repeatedly inquires the brightness to the plurality of brightness sensors 20, and receives a value indicating the brightness to be transmitted each time the brightness sensor 20 receives an inquiry May be Therefore, each time the brightness sensor 20 repeatedly receives an inquiry from the receiving unit 11, the brightness sensor 20 may transmit a value indicating the brightness repeatedly.

  Also, for example, in the above embodiment, the reception unit 11 wirelessly communicates with the plurality of brightness sensors 20, but the present invention is not limited thereto. For example, the receiving unit 11 may communicate with the plurality of brightness sensors 20 by wire.

  In addition, the comprehensive or specific aspect of the present invention may be realized by a system, a method, an integrated circuit, a computer program, or a recording medium such as a computer readable CD-ROM, a system, a method, an integrated circuit, a computer It may be realized by any combination of programs or recording media.

  In addition, an embodiment obtained by applying various modifications to those skilled in the art to the embodiment, and an embodiment realized by arbitrarily combining components and functions in each embodiment without departing from the scope of the present invention. Also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Lighting system 10 Lighting control apparatus 11 Reception part 12 Measurement part 13 Determination part 14 Control part 20, 21, 22, 23 Brightness sensor 30, 31a, 31b, 31c, 32a, 32b, 32c, 33a, 33b, 33c Lighting fixture

Claims (5)

A lighting control device that controls a light control rate of a lighting fixture associated with the plurality of brightness sensors such that the brightness detected by the plurality of brightness sensors is a predetermined brightness.
A receiving unit that receives a value indicating brightness repeatedly transmitted by each of the plurality of brightness sensors;
A measurement unit configured to measure a reception interval of a value indicating brightness repeatedly received by the reception unit;
A determination unit that determines, as the reception interval measured by the measurement unit, the amount of change in the light control rate of the lighting fixture as a larger value, as the reception interval increases;
The light control rate of the luminaire associated with the brightness sensor that has transmitted the value indicating the brightness received by the reception unit, the value indicating the brightness, and the change amount of the light control rate determined by the determination unit And a control unit configured to control in accordance with the above. The determination unit is
When the difference between the target value, which is a value indicating the predetermined brightness, and the value indicating the brightness received by the receiving unit is larger than a predetermined value, the longer the reception interval, the longer the reception interval. Determine the amount of change in dimming rate to a large value,
When the difference between the target value and the value indicating the brightness received by the receiving unit is smaller than a predetermined value, the change amount of the light control rate of the lighting device is determined to a predetermined value. The lighting control device according to. The lighting control device according to claim 1 or 2, wherein the control unit controls the light control rate of the lighting apparatus by fading the change amount of the light control rate at a time based on the reception interval. The control unit further controls the color temperature of the lighting device,
The lighting control device according to any one of claims 1 to 3, wherein when controlling the dimming rate of the lighting device, the color temperature of the lighting device is faded with a fade time for the color temperature. The lighting control device according to any one of claims 1 to 4.
The plurality of brightness sensors,
And a lighting system.

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