JP6853722B2 - How to create a lighting control table - Google Patents

Description

The present invention relates to a method for creating a lighting control table used for lighting control of a plurality of lighting fixtures provided in a space having a window portion into which daylight can be introduced.

Patent Document 1 describes a lighting device including a plurality of lighting devices. In the lighting device described in Patent Document 1, first, a plurality of lighting fixtures are dimmed, and the detected value of the brightness sensor when the brightness reaches a predetermined value is stored. After that, the plurality of lighting fixtures are feedback-controlled so that the detected value of the brightness sensor is maintained at the stored brightness target value.

Japanese Unexamined Patent Publication No. 2001-176676

However, in the lighting device described in Patent Document 1, since a plurality of lighting fixtures are feedback-controlled, there is a problem that the lighting control of the plurality of lighting fixtures becomes complicated. Therefore, it is conceivable to prepare a lighting control table in advance in which control values of a plurality of lighting fixtures are recorded.

By the way, in a space having a window portion into which daylight can be introduced, the feeling of brightness of the space changes greatly depending on the amount of daylight introduced from the window portion. In addition, in this specification, "the feeling of brightness of space" is also simply referred to as "the feeling of brightness". The sense of brightness is the impression of brightness felt from the entire space, that is, the amount of human senses. In addition, the feeling of brightness also changes depending on the lighting fixture to be turned on and its dimming rate. On the other hand, the feeling of brightness cannot be directly measured by a sensor or the like.

Therefore, an object of the present invention is to provide a method for creating a lighting control table for enabling lighting control in which a desired feeling of brightness can be obtained in a space having a window portion into which daylight can be introduced.

The method for creating the lighting control table according to the present invention includes a plurality of lighting fixture groups provided in a space having a window portion capable of introducing daylight, an amount of daylight introduced from the window portion, and a control value pattern of the lighting fixture group. A lighting control used in a lighting system including a lighting control table associated with the lighting in advance and a lighting control unit that controls lighting of a group of lighting fixtures based on the amount of daylight introduced from the window with reference to the lighting control table. Creating a table This is a method for creating a lighting control table, which is a setting value for the daylight introduction amount. A daylight introduction amount setting step for setting the daylight introduction amount, and a control value pattern candidate which is a candidate for a control value pattern. When the daylight of the set daylight introduction amount set in the pattern candidate setting step for setting multiple patterns and the daylight introduction amount setting step is introduced, the lighting fixture group is set with the control value pattern candidate set in the pattern candidate setting step. It includes an index value acquisition step for acquiring the brightness feeling index value of the space when lighting is controlled.

In the method for creating a lighting control table according to the present invention, when a plurality of control value pattern candidates are set and the lighting fixture group is lit and controlled by the control value pattern candidates when the set daylight introduction amount of daylight is introduced. Acquire the brightness index value of the space. Therefore, it is possible to create a lighting control table in which the daylight introduction amount and the control value pattern are associated with each other based on the brightness feeling index value. Therefore, by controlling the lighting with reference to the created lighting control table, it is easy to light a plurality of lighting fixture groups so that a desired feeling of brightness can be obtained according to the amount of daylight introduced from the window. Can be controlled. When creating the lighting control table, all control value pattern candidates may be selected as control value patterns corresponding to the set daylight introduction amount, and only some control value pattern candidates may be selected as the set daylight. It may be selected as a control value pattern corresponding to the introduction amount.

Based on the brightness index value acquired in the index value acquisition step, a pattern for selecting a control value pattern in the lighting control table corresponding to the set daylight introduction amount from a plurality of control value pattern candidates set in the pattern candidate setting step. Further selection steps may be provided. In this lighting control table creation method, the brightness index value is selected from a plurality of control value pattern candidates based on the brightness index value in order to select the control value pattern of the lighting control table corresponding to the set daylight introduction amount. Based on this, it is possible to create a lighting control table in which the daylight introduction amount and the control value pattern are associated with each other.

In the pattern selection step, one control value pattern may be selected according to one set daylight introduction amount. In this method of creating a lighting control table, it is possible to create a lighting control table in which the amount of daylight introduced and the control value pattern are associated one-to-one. Therefore, by referring to the created lighting control table, the control value pattern is inevitably determined according to the amount of daylight introduced, so that the lighting of the lighting equipment group can be easily controlled.

In the pattern selection step, a plurality of control value patterns may be selected according to one set daylight introduction amount. In this method of creating a lighting control table, it is possible to create a lighting control table in which a plurality of control value patterns are associated with one daylight introduction amount. Therefore, by referring to the created lighting control table, the degree of freedom of lighting control is increased, and it is possible to perform fine lighting control according to the situation.

The target brightness setting step for setting the target brightness index value of the space corresponding to the set daylight introduction amount is further provided, and the pattern selection step includes the brightness index value and the target index value acquired in the index value acquisition step. A control value pattern corresponding to the set daylight introduction amount may be selected based on the target brightness index value set in the setting step. In this lighting control table creation method, since the control value pattern corresponding to the set daylight introduction amount is selected based on the brightness feeling index value and the target brightness feeling index value, it is necessary to appropriately select the control value pattern. it can.

In the pattern selection step, a control value pattern corresponding to the set daylight introduction amount may be selected from the control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value. In this lighting control table creation method, the created lighting is used to select a control value pattern corresponding to the set daylight introduction amount from the control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value. By controlling the lighting with reference to the control table, it is possible to control the lighting of a plurality of lighting fixture groups so that a sufficient sense of brightness can be obtained in a space having a window portion into which daylight can be introduced.

The pattern selection step further includes a power consumption acquisition step for acquiring the power consumption when the lighting fixture group is controlled to be lit by the control value pattern candidate, and the pattern selection step includes a brightness feeling index value and a target index value setting step acquired in the index value acquisition step. In addition to the target brightness index value set in, the control value pattern corresponding to the set daylight introduction amount may be selected based on the power consumption acquired in the power consumption acquisition step. In this lighting control table creation method, in order to select a control value pattern corresponding to the set daylight introduction amount based on the power consumption, a plurality of lighting fixtures are lit by referring to the created lighting control table and controlling the lighting. The power consumption of the group can be reduced.

In the pattern selection step, a control value pattern corresponding to the set daylight introduction amount is selected from the control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is equal to or lower than the set power consumption. You may. In this lighting control table creation method, the control value corresponding to the set daylight introduction amount is selected from the control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is equal to or lower than the set power consumption. In order to select a pattern, by referring to the created lighting control table and controlling the lighting, it is possible to control the lighting of a plurality of lighting fixture groups so as to suppress an increase in power consumption and obtain a sufficient feeling of brightness. it can.

In the pattern selection step, the control value pattern candidate whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is the smallest may be selected as the control value pattern corresponding to the set daylight introduction amount. In this lighting control table creation method, the control value pattern candidate whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is the smallest is selected as the control value pattern corresponding to the set daylight introduction amount. By controlling the lighting with reference to the created lighting control table, it is possible to control the lighting of a plurality of lighting fixture groups so as to suppress an increase in power consumption and obtain a sufficient feeling of brightness.

In the pattern selection step, a control value pattern corresponding to the set daylight introduction amount may be selected based on the ratio of the brightness feeling index value to the power consumption. In this lighting control table creation method, in order to select a control value pattern corresponding to the set daylight introduction amount based on the ratio of the brightness feeling index value to the power consumption, lighting control is performed with reference to the created lighting control table. As a result, it is possible to control the lighting of a plurality of lighting fixture groups so as to suppress an increase in power consumption and obtain a sufficient feeling of brightness.

A plurality of control values set in the pattern candidate setting step The pattern candidate is further provided with a priority giving priority step, and in the pattern selection step, the brightness index value is given in descending order of priority given in the priority giving step. And the target brightness index value are compared, and the control value pattern candidate whose brightness index value is equal to or higher than the target brightness index value is used as the control value pattern corresponding to the set daylight introduction amount. You may choose. In this lighting control table creation method, the brightness sensation index value and the target brightness sensation index value are compared in descending order of priority, and first, the brightness sensation index value is equal to or higher than the target brightness sensation index value. Since the control value pattern candidates that have become are selected as the control value patterns corresponding to the set daylight introduction amount, it is necessary to create a lighting control table without necessarily acquiring the brightness index values for all the control value pattern candidates. Can be done. Therefore, the lighting control table can be efficiently created.

In the priority setting step, the higher the ratio of the brightness index value to the power consumption, the higher the priority may be. In this lighting control table creation method, the larger the ratio of the brightness feeling index value to the power consumption, the higher the priority, so that the control value pattern that suppresses the increase in power consumption and obtains a sufficient brightness feeling is obtained. Can be selected.

In the index value acquisition step, the brightness feeling index value may be acquired for all the control value pattern candidates set in the pattern candidate setting step. In this lighting control table creation method, since the brightness index values are acquired for all the control value pattern candidates, a more optimal control value pattern can be selected.

In the pattern candidate setting step, the upper limit of the control value of the luminaire group, the lower limit of the control value of the luminaire group, and the upper limit of the difference in the control value between the luminaire groups are set, and a plurality of controls are set under these set conditions. Value pattern candidates may be set. In this lighting control table creation method, as setting conditions for a plurality of control value pattern candidates, the upper limit of the control value of the luminaire group, the lower limit of the control value of the luminaire group, and the difference in the control value between the luminaire groups By setting the upper limit, it is possible to limit so that an excessively non-uniform lighting pattern is not set. Further, by doing so, it is possible to prevent the number of control value pattern candidates to be set from becoming excessive.

In the index value acquisition step, the average brightness of the control value pattern candidate, the AD value, which is the amount of brightness contrast with a long spatial period of light and darkness that reduces the feeling of brightness, and the spatial period of light and darkness that improves the feeling of brightness. The brightness index value of the control value pattern candidate may be calculated from the acquired average luminance, AD value, and CD value by acquiring the CD value which is the amount of the short luminance contrast. In this method of creating the lighting control table, the brightness index value can be calculated with high accuracy by calculating the brightness index value from the average brightness, the AD value, and the CD value.

In the index value acquisition step, the average brightness, the AD value, and the CD value may be calculated from the brightness distribution image. In this lighting control table creation method, the average brightness, the AD value, and the CD value can be calculated with high accuracy by calculating the average brightness, the AD value, and the CD value from the brightness distribution image.

In the index value acquisition step, the average brightness may be obtained from the measured values of the average luminance meter, the illuminance meter, or the luminance meter array including the plurality of luminance meters. In this method of creating a lighting control table, the average brightness can be quickly obtained by obtaining the average brightness from the measured values of the average luminance meter, the illuminance meter, or the luminance meter array.

In the index value acquisition step, the AD value may be obtained from the measured values of the illuminometer array composed of a plurality of illuminometers or the luminance meter array composed of a plurality of luminance meters. In this method of creating a lighting control table, the AD value can be quickly obtained by obtaining the AD value from the measured values of the illuminometer array or the luminance meter array.

In the index value acquisition step, the CD value may be obtained from the measured values of the luminance meter array composed of a plurality of luminance meters. In this method of creating a lighting control table, the CD value can be quickly obtained by obtaining the CD value from the measured values of the luminance meter array.

According to the present invention, it is possible to create a lighting control table for enabling lighting control that can obtain a desired feeling of brightness in a space having a window portion into which daylight can be introduced.

It is a schematic diagram which shows the lighting system provided in the space which has a window part which can introduce daylight. It is a flowchart which shows the lighting control method by the lighting control part of a lighting system. It is a table which shows an example of a lighting control table. It is a table which shows an example of a lighting control table. It is a table which shows an example of a lighting control table. It is a flowchart which shows the method of making the lighting control table of 1st Embodiment. It is a table which shows an example of a plurality of control value pattern candidates corresponding to a set daylight introduction amount. It is a figure which shows an example of the reference luminance distribution image. It is a figure which shows an example of the unit daylight introduction amount brightness distribution image. It is a figure which shows an example of the unit dimming rate luminance distribution image. It is a figure which shows an example of the unit dimming rate luminance distribution image. It is a figure which shows an example of the unit dimming rate luminance distribution image. It is a figure which shows an example of the unit dimming rate luminance distribution image. It is a figure which shows an example of the unit dimming rate luminance distribution image. It is a flowchart which shows the method of making the lighting control table of 2nd Embodiment. It is a table which shows an example of the priority of the control value pattern candidate. It is a table which shows an example of the priority of the control value pattern candidate. It is a flowchart which shows the method of making the lighting control table of 3rd Embodiment. It is a table which shows an example of a plurality of control value pattern candidates corresponding to a set daylight introduction amount. It is a flowchart which shows the method of making the lighting control table of 4th Embodiment.

Hereinafter, preferred embodiments of the method for creating a lighting control table according to the present invention will be described in detail with reference to the drawings. In all the drawings, the same or corresponding parts are designated by the same reference numerals.

[Lighting system]
First, a lighting system in which a lighting control table is used will be described.

As shown in FIG. 1, the lighting system 1 includes a plurality of lighting fixture groups 2 (2a, 2b, 2c), a switch 3, a daylight introduction amount detecting device 4, a lighting control table 5, and a lighting control unit 6. And.

The plurality of lighting fixture groups 2 are provided in a space S having a window portion 11 capable of introducing daylight. The space S is, for example, an office space such as an office, and a plurality of desks 12 and chairs 13 are arranged in the space S. The shape, size, etc. of the space S are not particularly limited. Further, the number, arrangement, etc. of the desk 12 and the chair 13 are not particularly limited. Although the window portion 11 is formed on the wall surface of the space S, it may be formed on the top surface, the floor surface, or the like of the space S. The size, number, and the like of the window portions 11 are not particularly limited. In the drawing, one window portion 11 is formed on the wall of the space S, and a blind 14 is attached to the window portion 11.

The luminaire group 2 is composed of one or a plurality of luminaires whose lighting is controlled collectively. A plurality of the lighting fixture groups 2 are provided in the space S. The luminaire group 2 functions as artificial lighting in the space S. On the other hand, the daylight introduced into the space S from the window portion 11 functions as natural lighting of the space S. As the lighting fixture group 2, for example, ceiling lighting, wall indirect lighting, window surface light-up lighting, and the like are used. The number of the luminaire group 2 is not particularly limited as long as it is a plurality. In the drawing, three lighting fixture groups 2 are provided: a lighting fixture group 2a, a lighting fixture group 2b, and a lighting fixture group 2c.

The switch 3 is provided corresponding to the lighting fixture group 2. That is, one switch 3 is provided corresponding to one lighting fixture group 2. In the drawing, three switches 3 of a switch 3a, a switch 3b, and a switch 3c are provided, and the switches 3a to 3c are associated with the luminaire group 2a to 2c, respectively. The switch 3 turns on (dims) and turns off the corresponding lighting fixture group 2 based on the control of the lighting control unit 6. That is, the switch 3 lights the corresponding luminaire group 2 at a predetermined dimming rate based on the control of the lighting control unit 6. Further, the switch 3 turns off the corresponding luminaire group 2 based on the control of the lighting control unit 6.

The daylight introduction amount detecting device 4 detects the daylight introduction amount. The amount of daylight introduced is the amount of daylight introduced into the space S after being incident from the window portion 11 and dimmed by the blind 14. The daylight introduction amount detecting device 4 detects the brightness of the daylight introduced in the space S as the daylight introduction amount. The daylight introduction amount detecting device 4 may detect an amount other than the brightness such as illuminance as the daylight introduction amount, but in the present embodiment, it will be described as detecting the brightness as the daylight introduction amount. As the daylight introduction amount detecting device 4, for example, a window surface brightness sensor, a brightness image sensor, an outdoor pyranometer, an outdoor luminometer, or the like can be used.

The lighting control table 5 is a table in which the amount of daylight introduced and the control value patterns of the plurality of lighting fixture groups 2 are associated with each other based on the brightness index value of the space S. The control value pattern is a pattern of control values of a plurality of lighting fixture groups 2. For example, when a plurality of luminaire groups 2 are composed of luminaire group A, luminaire group B, and luminaire group C, the control value pattern is the control value of luminaire group A and the control of luminaire group B. It is a combination of the value and the control value of the luminaire group C. The control value is a value for lighting control of the lighting fixture group 2. The control value can be, for example, a dimming rate, a target illuminance, or the like. The dimming rate is expressed as a percentage of 0% to 100%. The dimming rate of 0% means a state in which the luminaire group 2 is not lit, that is, a state in which the luminaire group 2 is off. The target illuminance is represented by a value of 0 lux or more. The target illuminance of 0 lux means a state in which the luminaire group 2 is not lit, that is, a state in which the luminaire group 2 is off. In the following description, the case where the dimming rate is adopted as the control value will be described, but the same applies when the target illuminance or the like is used. The details of the lighting control table 5 and the method of creating the lighting control table 5 will be described later.

The lighting control unit 6 is a control server that controls lighting of a plurality of lighting fixture groups 2 according to the amount of daylight introduced from the window unit 11 with reference to the lighting control table 5. That is, the lighting control unit 6 acquires the control value (dimming rate) of the lighting fixture group 2 corresponding to the daylight introduction amount detected by the daylight introduction amount detection device 4 from the lighting control table 5. Then, the lighting control unit 6 controls the lighting of the plurality of lighting fixture groups 2 with the acquired control value (dimming rate). That is, by controlling the switch 3, the lighting control unit 6 controls the lighting with the control value (dimming rate) acquired from the lighting fixture group 2 for each switch 3.

Next, a lighting control method by the lighting control unit 6 will be described.

As shown in FIG. 2, first, the lighting control unit 6 acquires the daylight introduction amount detected by the daylight introduction amount detection device 4 (S101). Next, the lighting control unit 6 acquires the control value pattern of the lighting fixture group 2 corresponding to the daylight introduction amount acquired in step S101 from the lighting control table 5 (S102). Next, the lighting control unit 6 performs lighting control of the lighting fixture group 2 with the control value pattern acquired in step S102 (S103). The lighting control by the lighting control unit 6 described above is repeated at predetermined intervals.

[Lighting control table]
Next, the lighting control table 5 will be described.

In the lighting control table 5, the amount of daylight introduced and the control values of the plurality of lighting fixture groups 2 are associated with each other using the feeling of brightness of the space S as an index.

The brightness feeling index value may be any value as long as it is a value using the brightness feeling as an index. Further, the brightness feeling index value may be obtained by any method. In the present embodiment, as an example, a method of obtaining the brightness feeling index value represented by the average brightness, the AD value, and the CD value will be described.

Since the feeling of brightness is the amount of human sensation, it is expressed as a quantified amount of human sensation as a brightness sensation index value. The brightness index value is also called an NSB (Natural-scale Space Brightness) value. The brightness index value is 13 levels from 1 to 13 (1: very dark, 3: dark, 5: slightly dark, 7: neither, 9: slightly bright, 11: bright, 13: very bright. ) Is represented by an ordinal scale. Factors that affect the feeling of brightness include, for example, average brightness, AD value (ambient-directivity value), and CD value (contrast-detail value).

The AD value is an amount of brightness contrast having a long spatial period of light and darkness that reduces the feeling of brightness. The AD value is also referred to as the non-uniformity of the first spatial frequency component representing the omnidirectionality of ambient light. The ambient light is daylight introduced from the window portion 11, lighting by the lighting fixture group 2, and the like, and omnidirectionality is also referred to as diffusivity. The CD value is the amount of brightness contrast with a short spatial period of light and darkness that improves the feeling of brightness. The CD value is also referred to as the non-uniformity of the second spatial frequency component, which represents the shading of details. When the average brightness is large, the feeling of brightness is large, when the AD value is small, the feeling of brightness is large, and when the CD value is large, the feeling of brightness is large. The brightness index value is expressed by the following equation (1).

NSB value = 0.28e ^{1.6 [a × (average brightness) −b × (AD value) + c × (CD value) + d]} … (1)
That is, the brightness index value is represented by a function using the average brightness, the AD value, and the CD value as explanatory variables. In equation (1), a, b, c, and d are constants.

As shown in FIG. 3, the lighting control table 5 includes a target NSB value, a daylight introduction amount (cd / m ² ), and a dimming rate (%) which is a control value of the lighting fixture group 2. The target NSB value is a brightness index value that is a target of the space S. One target NSB value may be set in the lighting control table 5, or a plurality of target NSB values may be set. When a plurality of target NSB values are set in the lighting control table 5, the lighting control unit 6 refers to a table corresponding to any of the target NSB values selected by the user or the like. In the drawing, two target NSB values are set. The dimming rate is set for each lighting fixture group 2 to be controlled.

The range of the amount of daylight introduced is set so that the brightness feeling index value is greatly affected from the viewpoint of suppressing the scale of the lighting control table 5 from becoming excessive and reducing the man-hours for creating the lighting control table 5. be able to. In this case, the interval (width) of the daylight introduction amount does not have to be evenly spaced, and may be, for example, logarithmically evenly spaced. Specifically, as the daylight introduction amount, for example, 0 cd / ^{m 2} or more 300 cd / ^{m 2} less than the range as ^{0cd / m 2, 300cd / m} 2 or more 500 cd / ^{m 2} less than the range 300 cd / ^{m 2} and then, the 500 cd / ^{m 2} or more 750 cd / ^{m 2} less than the range set to 500 cd / ^{m 2,} the 750 cd / ^{m 2} or more 1000 cd / ^{m 2} less than the range and ^{750cd / m 2, 1000cd / m} 2 or more 2000 cd / ^m less than ² The range of is 1000 cd / m ^2, and the range of 2000 cd / m ² or more is 2000 cd / m ² .

Here, in the lighting control table 5, the daylight introduction amount and the control value pattern may be associated one-to-one, or a plurality of control value patterns may be associated with one daylight introduction amount. .. FIG. 4 shows an example of the lighting control table 5 in which one control value pattern is associated with one daylight introduction amount, and FIG. 5 shows a plurality of control value patterns corresponding to one daylight introduction amount. An example of the attached lighting control table 5 is shown. The lighting control table 5 shown in FIGS. 4 and 5 includes a target NSB value, a daylight introduction amount (cd / m2), and a control value pattern of a plurality of lighting fixture groups 2. One control value pattern corresponds to, for example, the control value pattern of the lighting fixture groups A to C shown in FIG. Note that FIG. 4 shows an example in which one target NSB value and one daylight introduction amount are associated with one control value pattern, and FIG. 5 shows one target NSB value and one daylight introduction. An example is shown in which three control value patterns are associated with the quantity.

[Method of creating a lighting control table according to the first embodiment]
Next, a method of creating the lighting control table according to the first embodiment will be described. The lighting control table described below may be created by any entity, for example, a computer equipped with a CPU, a storage device, or the like.

As shown in FIG. 6, first, the daylight introduction amount setting step S1 is performed. In the daylight introduction amount setting step S1, the set daylight introduction amount, which is a set value of the daylight introduction amount, is set. The set daylight introduction amount is the daylight introduction amount set this time among the plurality of daylight introduction amounts set in the lighting control table 5.

Next, the target index value setting step S2 is performed. In the target index value setting step S2, the target brightness feeling index value is set. The target brightness feeling index value is a brightness feeling index value for realizing the target brightness feeling of the space S. The target brightness index value can be set according to the design of the light environment of the space S, and can be, for example, 6.0 or 7.0.

Next, the pattern candidate setting step S3 is performed. In the pattern candidate setting step S3, a plurality of control value pattern candidates that are candidates for the control value patterns in the lighting control table 5 are set. As shown in FIG. 7, the control value pattern candidate is a dimming rate pattern of a plurality of lighting fixture groups 2. For example, when a plurality of luminaire groups 2 are composed of luminaire group A, luminaire group B, and luminaire group C, the control value pattern candidates are the dimming rate of luminaire group A and the luminaire group B. It is a combination of the dimming rate of the above and the dimming rate of the lighting fixture group C. In the pattern candidate setting step S3, a plurality of control value pattern candidates are set. FIG. 7 shows 27 control value pattern candidates.

By the way, the dimming rate patterns of the luminaire group 2 exist infinitely. Therefore, it is not realistic to set control value pattern candidates for all patterns. Therefore, in the pattern candidate setting step S3, the upper limit of the dimming rate of the luminaire group 2, the lower limit of the dimming rate of the luminaire group, and the upper limit of the difference in the dimming rate between the luminaire group 2 are set. Set multiple control value pattern candidates under the set conditions. For example, as shown in FIG. 7, as setting conditions for a plurality of control value pattern candidates, the upper limit of the dimming rate of the luminaire group 2 is set to 80%, and the lower limit of the dimming rate of the luminaire group 2 is set to 40%. The upper limit of the difference in dimming rate between the lighting fixture groups 2 is 40%.

Next, the index value acquisition step S4 is performed. In the index value acquisition step S4, when the daylight of the set daylight introduction amount set in the daylight introduction amount setting step S1 is introduced, the lighting fixture group 2 is set with the control value pattern candidate set in the pattern candidate setting step S3. The brightness index value of the space S when the lighting is controlled is acquired. That is, in the index value acquisition step S4, the brightness feeling index value of the space S is acquired for all the control value pattern candidates set in the pattern candidate setting step S3. FIG. 7 shows an example of the brightness feeling index value acquired in the index value acquisition step S4.

As described above, since the brightness feeling is affected by the average brightness, the AD value, and the CD value, the brightness feeling index value can be expressed by a function using the average brightness, the AD value, and the CD value as explanatory variables. .. Therefore, in the index value acquisition step S4, first, the average luminance, the AD value, and the CD value of the control value pattern candidates are acquired (S11).

The average brightness, AD value and CD value can be calculated from the brightness distribution image. That is, a luminance distribution image corresponding to the control value pattern candidate is acquired, and the average luminance, the AD value, and the CD value are calculated from the acquired luminance distribution image. The brightness distribution image can be acquired by measuring the brightness distribution of the space S with an image sensor such as a digital camera, calculating the brightness distribution of the space S from the model of the space S created by CAD, and the like.

In this case, all the control value pattern candidates set in the pattern candidate setting step S3 may be reproduced to acquire the brightness index value, but for the sake of simplification of the work, only some control value pattern candidates are selected. The brightness sensation index value may be acquired by reproducing the brightness sensation index value, and the brightness sensation index value of the remaining control value pattern candidates may be obtained by using the acquired brightness sensation index value. The method for obtaining the brightness index value of the remaining control value pattern candidates from the brightness index value of some control value pattern candidates is not particularly limited, and various methods can be adopted. For example, a method utilizing the additivity of brightness can be adopted.

The brightness additiveity means that the brightness value in the image when the luminaire group A and the luminaire group B are lit at the same time is the brightness value at the same coordinates in the image when the luminaire group A is lit and the luminaire. It refers to the property of being the sum of the brightness values of the same coordinates in the image when the group B is turned on. In order to utilize such brightness additiveity, if a brightness distribution image of the unit daylight introduction amount for each window portion 11 and a brightness distribution image for the unit dimming rate for each lighting fixture group 2 are acquired. , It is possible to obtain a luminance distribution image of an arbitrary amount of daylight introduced and dimming rate by the sum of those linear polynomials.

Specifically, in a light environment in which daylight is not introduced from the window portion 11 into the space S, a brightness distribution image when a plurality of lighting fixture groups 2 are lit at a reference dimming rate is acquired. The reference dimming rate is an arbitrarily set dimming rate. The lighting fixture group 2 to be turned on can be arbitrarily selected. The brightness distribution image can be acquired from an image sensor, a CAD model, or the like. When the brightness distribution image is acquired from the captured image, the space S is imaged at night or with a blackout curtain that blocks the introduction of daylight on the window portion 11, so that the daylight from the window portion 11 to the space S is captured. It is possible to acquire a brightness distribution image of a light environment in which is not introduced. Then, the acquired luminance distribution image is used as a reference luminance distribution image. An example of the reference luminance distribution image is shown in FIG. FIG. 8 shows a reference luminance distribution image when all the lighting fixture groups 2 are lit at the reference dimming rate with the reference dimming rate set to 50%.

Further, with all the lighting fixture groups 2 turned off, a brightness distribution image is acquired when daylight of a unit daylight introduction amount is introduced from the window portion 11. The unit daylight introduction amount is an arbitrarily set daylight introduction amount. The brightness distribution image can be acquired from an image sensor, a CAD model, or the like. Then, the acquired luminance distribution image is used as a unit daylight introduction amount luminance distribution image. When a plurality of window portions 11 are formed in the space S, a unit daylight introduction amount luminance distribution image when the unit daylight introduction amount of daylight is introduced is acquired for each window portion 11. An example of the unit daylight introduction amount luminance distribution image is shown in FIG. FIG. 9 shows a luminance distribution image of the unit daylight introduction amount when the unit daylight introduction amount is 100 cd / m ^2.

Further, in a light environment in which daylight is not introduced from the window portion 11 into the space S, a brightness distribution image when the lighting fixture group 2 is lit at each unit dimming rate is acquired. For example, when the plurality of luminaire groups 2 include three luminaire groups 2 of luminaire group A, luminaire group B, and luminaire group C, when the luminaire group A is lit at a unit dimming rate. The luminance distribution image, the luminance distribution image when the luminaire group B is lit at the unit dimming rate, and the luminance distribution image when the luminaire group C is lit at the unit dimming rate are acquired. The unit dimming rate is an arbitrarily set dimming rate. The brightness distribution image can be acquired from an image sensor, a CAD model, or the like. Then, the acquired luminance distribution image is used as a unit dimming rate luminance distribution image corresponding to each luminaire group 2. An example of the unit dimming rate luminance distribution image is shown in FIGS. 10 to 14.

FIG. 10 shows a unit dimming rate luminance distribution image when only the lighting fixture group 2 which is the ceiling lighting arranged in the central part of the ceiling is lit at a dimming rate of 10%. FIG. 11 shows a unit dimming rate luminance distribution image when only the lighting fixture group 2 which is the ceiling lighting arranged near the wall is lit at a dimming rate of 10%. FIG. 12 shows a unit dimming rate luminance distribution image when only the lighting fixture group 2 which is the ceiling lighting arranged near the window is lit at a dimming rate of 10%. FIG. 13 shows a unit dimming rate luminance distribution image when only the lighting fixture group 2 which is the window surface light-up lighting is lit at a dimming rate of 100%. FIG. 14 shows a unit dimming rate luminance distribution image when only the lighting fixture group 2 which is indirect wall lighting is lit at a dimming rate of 100%.

Then, a brightness distribution image obtained by multiplying the reference brightness distribution image by the unit daylight introduction amount brightness distribution image by an arbitrary value is combined so as to obtain the set daylight introduction amount. Further, for all the lighting fixture groups 2, the brightness distribution obtained by multiplying the reference brightness distribution image by the unit dimming rate brightness distribution image by an arbitrary value so as to be the dimming rate of the lighting fixture group 2 in the control value pattern candidate. Combine images. As a result, the luminance distribution image of the control value pattern candidate can be acquired. The luminance distribution image is represented as a matrix in which the same number of numerical values as the number of pixels are arranged vertically and horizontally. The reference luminance distribution image is the matrix X, the unit dimming rate luminance distribution image of the lighting fixture group A is the matrix Ya, the unit dimming rate luminance distribution image of the lighting fixture group B is the matrix Yb, and the unit tone of the lighting fixture group C. When the light rate luminance distribution image is a matrix Yc and the unit daylight introduction amount luminance distribution image is a matrix Z, the luminance distribution image in the control value pattern candidate is represented by the following equation (2).

Luminance distribution image = X + a × Ya + b × Yb + c × Yc + d × Z ... (2)
In equation (2), a, b, c, and d are arbitrary values.

The method of calculating the AD value and the CD value from the luminance distribution image can be performed by various methods, for example, as follows. The following method is the method described in Japanese Patent Application Laid-Open No. 2017-02993. First, the luminance distribution image is frequency-decomposed into a plurality of different frequency components. As the frequency decomposition, for example, the wavelet decomposition of Symlet6 can be adopted. Then, the spatial frequency component decomposed into the spatial frequency of 0.01 [cycle / deg] or more and 0.03 [cycle / deg] or less becomes a component representing the omnidirectionality of ambient light. Therefore, the variance of brightness within a predetermined angle of view of a spatial frequency of 0.01 [cycle / deg] or more and 0.03 [cycle / deg] or less, that is, non-uniformity is defined as an AD value. On the other hand, the spatial frequency component decomposed into spatial frequencies of 0.2 [cycle / deg] or more and 1.0 [cycle / deg] or less is a component representing the shading of details such as the edges of furniture. Therefore, the variance of brightness within a predetermined angle of view of a spatial frequency of 0.2 [cycle / deg] or more and 1.0 [cycle / deg] or less, that is, non-uniformity is defined as a CD value.

The reference luminance distribution image does not necessarily have to be used when acquiring the average luminance, the AD value, and the CD value. That is, the control value pattern is obtained by synthesizing the luminance distribution image obtained by multiplying the unit daylight introduction amount luminance distribution image by an arbitrary value and the luminance distribution image obtained by multiplying the unit dimming rate luminance distribution image by an arbitrary value. The brightness distribution image of the candidate may be acquired.

Then, the average luminance, the AD value, and the CD value are calculated from the luminance distribution image in the acquired control value pattern candidate. In this case, the average brightness, the AD value, and the CD value may be calculated from the entire luminance distribution image, but the average luminance, the AD value, and the CD value may be calculated from within a predetermined angle of view of the luminance distribution image.

The average brightness, the AD value, and the CD value may be acquired without using the brightness distribution image. For example, the average brightness can be calculated from measured values of an average luminance meter, an illuminance meter, a luminance meter array, and the like. The AD value can be calculated from the measured values of the illuminometer array, the luminance meter array, and the like. The CD value can be calculated from the measured value of the luminance meter array or the like. The illuminometer array is composed of a plurality of illuminometers having low directivity, and can measure the illuminance in a plurality of surrounding areas. Therefore, the illuminometer array is preferably used for calculating the AD value. The luminance meter array is composed of a plurality of luminance meters having high directivity, and can measure the luminance of a plurality of surrounding areas. Therefore, the luminance meter array is preferably used for calculating the CD value.

Further, regarding the acquisition of the average luminance, if the luminance distribution image is imaged by an image sensor such as a digital camera under a plurality of conditions and the regression equation between the luminance distribution image and the measured value of the illuminometer is obtained, the measured value of the illuminometer is obtained. And the average brightness can be obtained. Therefore, using this linearity, the average brightness can be calculated from the measured value of the illuminometer.

Further, regarding the acquisition of the AD value, if the luminance distribution image is imaged by an image sensor such as a digital camera under a plurality of conditions and the regression equation between the luminance distribution image and the ratio of the plurality of illuminometers is obtained, the illuminometer can be obtained. The linearity between the measured value and the AD value can be obtained. Therefore, using this linearity, the AD value can be calculated from the measured value of the illuminometer.

Further, regarding the acquisition of the AD value, the brightness distribution image is imaged under a plurality of conditions by an image sensor such as a digital camera, and the relationship between the control value pattern candidates of the plurality of lighting fixture groups 2 and the AD value is constructed as a database. You can also keep it. As a result, the AD value can be obtained from the control value pattern candidates of the plurality of lighting fixture groups 2.

Further, regarding the acquisition of the CD value, the brightness distribution image is imaged under a plurality of conditions by an image sensor such as a digital camera, and the relationship between the control value pattern candidates of the plurality of lighting fixture groups 2 and the CD value is constructed as a database. You can also keep it. As a result, the CD value can be obtained from the control value pattern candidates of the plurality of lighting fixture groups 2. If there is no variation in the control value pattern candidates of the plurality of lighting fixture groups 2, the CD value is almost determined by the arrangement of furniture and hardly fluctuates. Therefore, the CD value is set as a fixed value and new acquisition is omitted. be able to.

Further, the average brightness and the AD value may be acquired from the luminance distribution image, and the CD value may be acquired from a luminance meter, an illuminance meter, or the like. It may be obtained from a luminometer or the like. That is, two values of the average brightness, the AD value, and the CD value may be obtained from the same information source.

In this way, since different methods can be adopted for acquiring the average brightness, the AD value, and the CD value, it is sufficient to adopt a method that can be easily acquired from the image sensor, the luminance meter, the illuminance meter, and the like. ..

In the index value acquisition step S4, next, the brightness feeling index value of the control value pattern candidate is calculated from the acquired average luminance, AD value, and CD value (S12). The brightness feeling index value can be calculated by substituting the acquired average brightness, AD value, and CD value into the above-mentioned equation (1).

Next, the pattern selection step S5 is performed. In the pattern selection step S5, based on the brightness index value acquired in the index value acquisition step S4, the lighting control table corresponding to the set daylight introduction amount from the plurality of control value pattern candidates set in the pattern candidate setting step S3. Select the control value pattern of 5. The selected control value pattern becomes a control table corresponding to the set daylight introduction amount in the lighting control table.

More specifically, in the pattern selection step S5, the pattern candidate setting step S3 is based on the brightness index value acquired in the index value acquisition step S4 and the target brightness index value set in the target index value setting step S2. From the plurality of control value pattern candidates set in step 1, the control value pattern of the lighting control table 5 corresponding to the set daylight introduction amount is selected. For example, in the pattern selection step S5, a control value pattern corresponding to the set daylight introduction amount is selected from the control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value. When there are a plurality of control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value, any control value pattern candidate may be selected as the control value pattern corresponding to the set daylight introduction amount. In this case, for example, the control value pattern candidate having the smallest brightness index value may be selected as the control value pattern corresponding to the daylight introduction amount, and the control value pattern candidate having the largest brightness index value may be set. It may be selected as a control value pattern corresponding to the amount of daylight introduced.

Here, when creating a lighting control table 5 (see FIG. 4) in which one control value pattern is associated with one daylight introduction amount, the pattern selection step S5 corresponds to one set daylight introduction amount. Select one control value pattern. On the other hand, when creating a lighting control table 5 (see FIG. 5) in which a plurality of control value patterns are associated with one daylight introduction amount, the pattern selection step S5 corresponds to one set daylight introduction amount. Select multiple control value patterns.

Next, it is determined whether or not there is another daylight introduction amount to be set (S6). If there is another daylight introduction amount to be set (S6: YES), then the set daylight introduction amount is set and changed (S7), and steps S3 to S6 described above are performed again. On the other hand, if there is no other daylight introduction amount to be set (S6: NO), the creation of the lighting control table 5 is completed.

As described above, in the method of creating the lighting control table according to the present embodiment, a plurality of control value pattern candidates are set, and when the set daylight introduction amount of daylight is introduced, the lighting fixture group is selected by the control value pattern candidates. The brightness index value of the space S when the lighting is controlled is acquired. Therefore, it is possible to create the illumination control table 5 in which the daylight introduction amount and the control value pattern are associated with each other based on the brightness feeling index value. Therefore, the lighting control unit 6 of the lighting system 1 obtains a desired feeling of brightness according to the amount of daylight introduced from the window unit 11 by controlling the lighting with reference to the created lighting control table 5. The lighting of the plurality of lighting fixture groups 2 can be easily controlled so as to be obtained.

Then, in order to select the control value pattern of the lighting control table 5 corresponding to the set daylight introduction amount from the plurality of control value pattern candidates based on the brightness feeling index value, the daylight introduction amount based on the brightness feeling index value. It is possible to create a lighting control table 5 in which and a control value pattern are associated with each other.

Further, when creating a lighting control table 5 in which the daylight introduction amount and the control value pattern are associated one-to-one, the lighting control is performed with reference to the created lighting control table 5, so that the daylight introduction amount can be adjusted. Since the control value pattern is inevitably determined accordingly, it is possible to easily control the lighting of the lighting equipment group.

On the other hand, when creating a lighting control table 5 in which a plurality of control value patterns are associated with one daylight introduction amount, the degree of freedom of lighting control is achieved by controlling the lighting with reference to the created lighting control table 5. That is, the optimum control value pattern can be selected from a plurality of control value patterns, so that it is possible to perform fine lighting control according to the situation.

Further, since the control value pattern corresponding to the set daylight introduction amount is selected based on the brightness feeling index value and the target brightness feeling index value, the control value pattern can be appropriately selected.

Further, in order to select a control value pattern corresponding to the set daylight introduction amount from the control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value, the lighting control unit 6 of the lighting system 1 sets the lighting control unit 6. By controlling the lighting with reference to the created lighting control table 5, the lighting of the plurality of lighting fixture groups 2 is controlled so that a sufficient feeling of brightness can be obtained in the space S having the window portion 11 capable of introducing daylight. be able to.

Further, since the brightness index value is acquired for all the control value pattern candidates, a more optimum control value pattern can be selected.

Further, as setting conditions for a plurality of control value pattern candidates, an upper limit of the control value of the luminaire group 2, a lower limit of the control value of the luminaire group 2, and an upper limit of the difference in the control value between the luminaire group 2 are set. This makes it possible to limit the setting of excessively non-uniform lighting patterns. Further, by doing so, it is possible to prevent the number of control value pattern candidates to be set from becoming excessive.

Further, by calculating the brightness feeling index value from the average brightness, the AD value, and the CD value, the brightness feeling index value can be calculated with high accuracy.

Further, by calculating the average brightness, the AD value and the CD value from the luminance distribution image, the average brightness, the AD value and the CD value can be calculated with high accuracy.

Further, the average brightness can be quickly obtained by obtaining the average brightness from the measured values of the average luminance meter, the illuminance meter, or the luminance meter array.

Further, by obtaining the AD value from the measured value of the illuminance meter array or the luminance meter array, the AD value can be obtained quickly.

Further, by obtaining the CD value from the measured value of the luminance meter array, the CD value can be obtained quickly.

[Method of creating a lighting control table according to the second embodiment]
Next, a method of creating the lighting control table according to the second embodiment will be described.

The method for creating the lighting control table according to the second embodiment is basically the same as the method for creating the lighting control table according to the first embodiment, and not all control value pattern candidates but some control value pattern candidates. It differs from the method of creating the lighting control table according to the first embodiment only in that the brightness feeling index value is acquired. Therefore, in the following, only the matters different from the method for creating the lighting control table according to the first embodiment will be described, and the same description as the method for creating the lighting control table according to the first embodiment will be omitted.

In the method of creating the lighting control table according to the second embodiment, the control value pattern candidates are prioritized, and the brightness index value and the target brightness index value are compared in descending order of priority. First, the control value pattern candidate whose brightness index value is equal to or higher than the target brightness index value is selected as the control value pattern of the lighting control table corresponding to the set daylight introduction amount.

More specifically, as shown in FIG. 15, when the pattern candidate setting step S3 is completed, the priority giving step S21 is then performed. In the priority assignment step S21, a plurality of control value pattern candidates set in the pattern candidate setting step S3 are prioritized (set).

The priority of the control value pattern candidate is not particularly limited, but it is preferable to determine the priority based on an index that may affect the feeling of brightness. For example, as shown in FIG. 16, the smaller the variation in the dimming rate of the luminaire group 2, the higher the priority may be. The variation in the dimming rate can be expressed by, for example, the dispersion of the dimming rate. The smaller the variation in the dimming rate, the more uniform the dimming rate. Further, as shown in FIG. 17, the smaller the dimming rate of the first set lighting fixture group 2, and the smaller the dimming rate of the second set lighting fixture group 2, the higher the priority. You may. The luminaire group 2 to be set first may be, for example, a luminaire group known to be inefficient in advance, and in FIG. 17, the luminaire group C is used. The luminaire group 2 set second can be, for example, a luminaire group known to be inefficient next to the luminaire group 2 set first, and in FIG. 17, the luminaire group B is set. There is.

Next, a control value pattern candidate for acquiring the brightness index value is selected (S22). In step S22, the control value pattern candidates for acquiring the brightness index value are selected in descending order of the priority given in the priority giving step S21. When step S22 is performed for the first time, the control value pattern candidate with the highest priority is selected in the priority giving step S21.

In the index value acquisition step S4, not the brightness index values of all the control value pattern candidates set in the pattern candidate setting step S3, but only the brightness index values of the control value pattern candidates selected in step S22 are acquired.

In the pattern selection step S5, the brightness feeling index value acquired in the index value acquisition step S4 (the brightness feeling index value of the control value pattern candidate selected in step S22) and the target brightness feeling set in the target index value setting step S2. Compare with the index value. Then, when the brightness index value acquired in the index value acquisition step S4 is equal to or greater than the target brightness index value, the control value pattern candidate selected in step S22 is set to the lighting control table corresponding to the set daylight introduction amount. Select as the control value pattern of 5.

Next, it is determined whether or not the brightness index value acquired in the index value acquisition step S4 is equal to or greater than the target brightness index value (S23). That is, in step S23, it is determined whether or not the control value pattern is selected in the pattern selection step S5. If it is determined that the brightness index value acquired in the index value acquisition step S4 is not equal to or greater than the target brightness index value (the control value pattern is not selected in the pattern selection step S5) (S23: NO), step S22 is performed. As the control value pattern candidate for returning and acquiring the brightness index value, the control value pattern candidate having the next highest priority is selected (S22). Then, the same process as described above is performed again.

On the other hand, if it is determined that the brightness index value acquired in the index value acquisition step S4 is equal to or greater than the target brightness index value (the control value pattern is selected in the pattern selection step S5) (S23: YES), another It is determined whether or not there is a daylight introduction amount to be set (S6). If there is another daylight introduction amount to be set (S6: YES), then the set daylight introduction amount is set and changed (S7), and steps S3 to S6 described above are performed again. On the other hand, if there is no other daylight introduction amount to be set (S6: NO), the creation of the lighting control table 5 is completed.

In this way, the brightness sensation index value and the target brightness sensation index value are compared in descending order of priority, and the control value pattern in which the brightness sensation index value first becomes equal to or higher than the target brightness sensation index value. Since the candidates are selected as the control value patterns corresponding to the set daylight introduction amount, the lighting control table 5 can be created without necessarily acquiring the brightness feeling index values for all the control value pattern candidates. Therefore, the lighting control table 5 can be efficiently created.

[Method of creating a lighting control table according to the third embodiment]
Next, a method of creating the lighting control table according to the third embodiment will be described.

The method for creating the lighting control table according to the third embodiment is basically the same as the method for creating the lighting control table according to the first embodiment, and daylight is set from a plurality of control value pattern candidates based on the power consumption. It differs from the method of creating the lighting control table according to the first embodiment only in that the control value pattern of the lighting control table corresponding to the introduced amount is selected. Therefore, in the following, only the matters different from the method for creating the lighting control table according to the first embodiment will be described, and the same description as the method for creating the lighting control table according to the first embodiment will be omitted.

As shown in FIG. 18, when the pattern candidate setting step S3 is completed, the power consumption acquisition step S31 is then performed. In the power consumption acquisition step S31, the power consumption when the lighting fixture group 2 is lit and controlled by the control value pattern candidate set in the pattern candidate setting step S3 is acquired. That is, in the power consumption acquisition step S31, the power consumption is acquired for each control value pattern candidate set in the pattern candidate setting step S3. The power consumption can be calculated as follows, for example. First, the power consumption of the lighting fixture group 2 when it is turned on at a predetermined dimming rate is calculated. Then, the power consumption of the luminaire group 2 when lighting is controlled by the control value pattern candidate is totaled. As a result, the power consumption of the control value pattern candidate can be acquired. FIG. 19 shows an example of the power consumption acquired in the power consumption acquisition step S31. In FIG. 19, the power consumption is represented by a value divided by the area of the space S, and the unit is (W / m ² ). However, the acquired power consumption does not necessarily have to be a value divided by the area of the space S, and may be represented by a value as it is not divided by the area of the space S, and the unit may be (W).

In the pattern selection step S5, in addition to the brightness feeling index value acquired in the index value acquisition step S4 and the target brightness feeling index value set in the target index value setting step S2, the power consumption acquired in the power consumption acquisition step S31 is added. Based on the above, the control value pattern of the lighting control table 5 corresponding to the set daylight introduction amount is selected from the plurality of control value pattern candidates set in the pattern candidate setting step S3.

The control value pattern corresponding to the set daylight introduction amount can be selected by, for example, the following method.

In the pattern selection step S5, a control value pattern corresponding to the set daylight introduction amount is selected from the control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is equal to or lower than the set power consumption. Select. If there are multiple control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is less than or equal to the set power consumption, which control value pattern candidate is set is set. Control corresponding to the daylight introduction amount It may be selected as a value pattern. For example, the control value pattern candidate having the smallest brightness index value may be selected as the control value pattern corresponding to the set daylight introduction amount, and the control value pattern candidate having the largest brightness index value may be selected to set the daylight introduction. It may be selected as a control value pattern corresponding to the quantity. Further, in the pattern selection step S5, the control value pattern candidate whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is the smallest is selected as the control value pattern corresponding to the set daylight introduction amount. May be good. Further, in the pattern selection step S5, the brightness sensation index value is equal to or higher than the target brightness sensation index value, and the brightness sensation index value (or the brightness sensation index value) with respect to the power consumption (or the amount of increase in power consumption). The control value pattern candidate having the largest rate of increase) may be selected as the control value pattern corresponding to the set daylight introduction amount.

As described above, in the method for creating the lighting control table according to the present embodiment, in order to select the control value pattern corresponding to the set daylight introduction amount based on the power consumption, the lighting control table 5 is lit with reference to the created lighting control table 5. By controlling, the power consumption of the plurality of lighting fixture groups 2 can be reduced.

Also, it is created to select the control value pattern corresponding to the set daylight introduction amount from the control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is less than or equal to the set power consumption. By controlling the lighting with reference to the lighting control table 5, it is possible to control the lighting of the plurality of lighting fixture groups 2 so as to suppress an increase in power consumption and obtain a sufficient feeling of brightness.

Further, the lighting control table 5 created in order to select the control value pattern candidate whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is the smallest as the control value pattern corresponding to the set daylight introduction amount. By controlling the lighting with reference to the above, it is possible to control the lighting of the plurality of lighting fixture groups 2 so as to suppress an increase in power consumption and obtain a sufficient feeling of brightness.

In addition, in order to select a control value pattern corresponding to the set daylight introduction amount based on the ratio of the brightness feeling index value to the power consumption, the power consumption is increased by controlling the lighting with reference to the created lighting control table. It is possible to control the lighting of the plurality of lighting fixture groups 2 so as to suppress the above and obtain a sufficient feeling of brightness.

[Method of creating a lighting control table according to the fourth embodiment]
Next, a method of creating the lighting control table according to the fourth embodiment will be described.

The method for creating the lighting control table according to the fourth embodiment is basically the same as the method for creating the lighting control table according to the third embodiment, and not all control value pattern candidates but some control value pattern candidates. It differs from the method of creating the lighting control table according to the third embodiment only in that the brightness feeling index value is acquired. Therefore, in the following, only the matters different from the method for creating the lighting control table according to the third embodiment will be described, and the same description as the method for creating the lighting control table according to the third embodiment will be omitted.

In the method for creating the lighting control table according to the fourth embodiment, the control value pattern candidates are prioritized based on the power consumption, and the brightness index value and the target brightness index value are compared in descending order of priority. First, the control value pattern candidate whose brightness index value is equal to or higher than the target brightness index value is selected as the control value pattern of the lighting control table corresponding to the set daylight introduction amount.

More specifically, as shown in FIG. 20, when the power consumption acquisition step S31 is completed, the priority giving step S41 is next performed. In the priority assignment step S41, the plurality of control value pattern candidates set in the pattern candidate setting step S3 are prioritized (set) based on the power consumption acquired in the power consumption acquisition step S31.

The priority of the control value pattern candidate is not particularly limited as long as it is based on the power consumption. For example, the higher the ratio of the brightness index value to the power consumption, the higher the priority may be. Further, the lower the power consumption, or the closer the power consumption is to the set value arbitrarily set, the higher the priority may be.

Next, the control value pattern candidate for acquiring the brightness feeling index value is selected (S42). In step S42, the control value pattern candidates for acquiring the brightness index value are selected in descending order of the priority given in the priority giving step S41. When step S42 is performed for the first time, the control value pattern candidate with the highest priority is selected in the priority giving step S41.

In the index value acquisition step S4, not the brightness index values of all the control value pattern candidates set in the pattern candidate setting step S3, but only the brightness index values of the control value pattern candidates selected in step S42 are acquired.

In the pattern selection step S5, the brightness feeling index value acquired in the index value acquisition step S4 (the brightness feeling index value of the control value pattern candidate selected in step S42) and the target brightness feeling set in the target index value setting step S2. Compare with the index value. Then, when the brightness index value acquired in the index value acquisition step S4 is equal to or greater than the target brightness index value, the control value pattern candidate selected in step S42 is set to the lighting control table corresponding to the set daylight introduction amount. Select as the control value pattern of.

Next, it is determined whether or not the brightness index value acquired in the index value acquisition step S4 is equal to or greater than the target brightness index value (S43). That is, in step S43, it is determined whether or not the control value pattern is selected in the pattern selection step S5. If it is determined that the brightness index value acquired in the index value acquisition step S4 is not equal to or greater than the target brightness index value (the control value pattern is not selected in the pattern selection step S5) (S43: NO), step S42 is performed. As the control value pattern candidate for returning and acquiring the brightness index value, the control value pattern candidate having the next highest priority is selected (S42). Then, the same process as described above is performed again.

On the other hand, if it is determined that the brightness index value acquired in the index value acquisition step S4 is equal to or greater than the target brightness index value (the control value pattern is selected in the pattern selection step S5) (S43: YES), another It is determined whether or not there is a daylight introduction amount to be set (S6). If there is another daylight introduction amount to be set (S6: YES), then the set daylight introduction amount is set and changed (S7), and steps S3 to S6 described above are performed again. On the other hand, if there is no other daylight introduction amount to be set (S6: NO), the creation of the lighting control table 5 is completed.

In this way, the brightness sensation index value and the target brightness sensation index value are compared in descending order of priority, and the control value pattern in which the brightness sensation index value first becomes equal to or higher than the target brightness sensation index value. Since the candidates are selected as the control value patterns corresponding to the set daylight introduction amount, the lighting control table 5 can be created without necessarily acquiring the brightness feeling index values for all the control value pattern candidates. Therefore, the lighting control table 5 can be efficiently created.

Further, by increasing the priority as the ratio of the brightness feeling index value to the power consumption increases, it is possible to select a control value pattern that suppresses an increase in power consumption and obtains a sufficient brightness feeling.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

For example, if a plurality of control value pattern candidates are set and the brightness index value of the control value pattern candidate is acquired, the daylight introduction amount and the control value pattern are associated with each other based on the brightness index value. Since the lighting control table can be created, after setting a plurality of control value pattern candidates and acquiring the brightness index value of the control value pattern candidates, the lighting control table may be created by any method. .. For example, all the set control value pattern candidates may be used as they are as control value patterns corresponding to the set daylight introduction amount of the lighting control table. In this case, the set control value pattern candidate and the control value pattern corresponding to the set daylight introduction amount of the lighting control table are the same.

Further, in the above embodiment, the specific spatial frequencies of the AD value and the CD value when the luminance distribution image is frequency-resolved are specified. However, the AD value may be a component of any spatial frequency as long as it is an amount of brightness contrast having a long spatial period of light and darkness that reduces the feeling of brightness. Similarly, the CD value may be a component of any spatial frequency as long as it is an amount of brightness contrast with a short spatial period of light and darkness that improves the feeling of brightness.

Further, in the above embodiment, the order in which each step is performed is specified as a method for creating the lighting control table, but the order of these steps can be changed as appropriate as long as it does not contradict the gist of the present invention. For example, the target index value setting step S2 may be performed at any stage as long as it is before the pattern selection step S5.

Further, in the second embodiment and the fourth embodiment, the control value pattern candidates are prioritized and the brightness index value is acquired for some of the control value pattern candidates, but the control value pattern candidates are not necessarily obtained. It is not necessary to prioritize, for example, the order of randomly acquiring the brightness index (the order of comparison with the target brightness index value) is set, and the brightness index is acquired and acquired in this order. The brightness index value and the target brightness index value may be compared.

1 ... Lighting system, 2 (2a to 2c) ... Lighting equipment group, 3 (3a to 3c) ... Switch, 4 ... Daylight introduction amount detection device, 5 ... Lighting control table, 6 ... Lighting control unit, 11 ... Window unit , 12 ... desk, 13 ... chair, 14 ... blind, S ... space.

Claims (16)

A plurality of lighting fixture groups provided in a space having a window portion capable of introducing daylight, and a lighting control table in which the amount of daylight introduced from the window portion and the control value pattern of the lighting fixture group are associated in advance. A lighting control for creating the lighting control table, which is used in a lighting system including a lighting control unit that controls lighting of the lighting fixture group based on the amount of daylight introduced from the window with reference to the lighting control table. How to create a table
Setting that is the set value of the daylight introduction amount The daylight introduction amount setting step that sets the daylight introduction amount, and
A pattern candidate setting step for setting a plurality of control value pattern candidates that are candidates for the control value pattern, and
When the daylight of the set daylight introduction amount set in the daylight introduction amount setting step is introduced, the lighting fixture group is lit and controlled by the control value pattern candidate set in the pattern candidate setting step. , The index value acquisition step for acquiring the brightness feeling index value of the space, and
Based on the brightness index value acquired in the index value acquisition step, the control of the lighting control table corresponding to the set daylight introduction amount from the plurality of control value pattern candidates set in the pattern candidate setting step. The pattern selection step to select the value pattern and
A target index value setting step for setting a target brightness feeling index value of the space corresponding to the set daylight introduction amount, and a target index value setting step.
A priority giving step for giving priority to a plurality of the control value pattern candidates set in the pattern candidate setting step is provided .
In the pattern selection step, the brightness feeling index value acquired in the index value acquisition step and the target brightness set in the target index value setting step are set in descending order of priority given in the priority assignment step. By comparing with the sensation index value, first, the control value pattern candidate whose brightness sensation index value is equal to or greater than the target brightness sensation index value is selected as the control value pattern corresponding to the set daylight introduction amount. Select as,
How to create a lighting control table. In the pattern selection step, one control value pattern is selected corresponding to one set daylight introduction amount.
The method for creating a lighting control table according to claim 1. In the pattern selection step, a plurality of the control value patterns are selected corresponding to one set daylight introduction amount.
The method for creating a lighting control table according to claim 1. In the pattern selection step, the control value pattern corresponding to the set daylight introduction amount is selected from the control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value.
The method for creating a lighting control table according to any one of claims 1 to 3. Further provided with a power consumption acquisition step of acquiring the power consumption when the lighting fixture group is lit and controlled by the control value pattern candidate.
In the pattern selection step, in addition to the brightness index value acquired in the index value acquisition step and the target brightness index value set in the target index value setting step, the consumption acquired in the power consumption acquisition step. The control value pattern corresponding to the set daylight introduction amount is selected based on the power consumption.
The method for creating a lighting control table according to any one of claims 1 to 3. In the pattern selection step, the set daylight introduction amount is supported from the control value pattern candidates whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is equal to or lower than the set power consumption. Select the control value pattern to be
The method for creating a lighting control table according to claim 5. In the pattern selection step, the control value pattern candidate whose brightness index value is equal to or higher than the target brightness index value and whose power consumption is the smallest is selected as the control value pattern corresponding to the set daylight introduction amount. Select as,
The method for creating a lighting control table according to claim 5. In the pattern selection step, the control value pattern corresponding to the set daylight introduction amount is selected based on the ratio of the brightness feeling index value to the power consumption.
The method for creating a lighting control table according to claim 5. In the priority-giving step, the higher the ratio of the brightness index value to the power consumption, the higher the priority.
The method for creating a lighting control table according to any one of claims 1 to 8. In the index value acquisition step, the brightness feeling index value is acquired for all the control value pattern candidates set in the pattern candidate setting step.
The method for creating a lighting control table according to any one of claims 1 to 9. In the pattern candidate setting step, an upper limit of the control value of the luminaire group, a lower limit of the control value of the luminaire group, and an upper limit of the difference in the control value between the luminaire groups are set, and the set conditions are set. To set a plurality of the control value pattern candidates with
The method for creating a lighting control table according to any one of claims 1 to 10. In the index value acquisition step, the average brightness of the control value pattern candidate, the AD value which is the amount of brightness contrast with a long spatial period of light and darkness that lowers the feeling of brightness, and the spatial of light and darkness that improves the feeling of brightness. A CD value, which is an amount of luminance comparison having a short period, is acquired, and the brightness feeling index value of the control value pattern candidate is calculated from the acquired average luminance, the AD value, and the CD value.
The method for creating a lighting control table according to any one of claims 1 to 11. In the index value acquisition step, at least two of the average brightness, the AD value, and the CD value are calculated from the brightness distribution image.
The method for creating a lighting control table according to claim 12. In the index value acquisition step, the average brightness is obtained from the measured values of an average luminance meter, an illuminance meter, or a luminance meter array composed of a plurality of luminance meters.
The method for creating a lighting control table according to claim 12 or 13. In the index value acquisition step, the AD value is obtained from the measured values of an illuminance meter array composed of a plurality of illuminometers or a luminance meter array composed of a plurality of luminance meters.
The method for creating a lighting control table according to any one of claims 12 to 14. In the index value acquisition step, the CD value is obtained from the measured values of a luminance meter array composed of a plurality of luminance meters.
The method for creating a lighting control table according to any one of claims 12 to 15.

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