JP7450162B2 - Environmental control system, environmental control method, and program - Google Patents

Description

The present disclosure relates to an environmental control system, an environmental control method, and a program.

Patent Document 1 discloses a lighting control device. This lighting control device divides the lighting area into a plurality of areas in advance and determines whether each divided area is a stay area where people stay or a non-stay area based on the movement speed of people in the lighting area detected by the human body information detection means. do. Then, the lighting control means performs lighting control on the lighting fixtures arranged in the segmented area based on the determination result.

Japanese Patent Application Publication No. 2013-109876

The present invention provides an environmental control system, an environmental control method, and a program that easily eliminate stagnation in the user's flow line.

An environmental control system according to one aspect of the present invention includes an instruction section, an acquisition section, and a calculation section. The instruction section instructs a lighting control section that controls light emission of a lighting fixture assigned to each of a plurality of specific spaces. The acquisition unit acquires information regarding users existing in each of the plurality of specific spaces. The calculation unit calculates a retention index of the user in each of the plurality of specific spaces based on the information regarding the user acquired by the acquisition unit. The instruction unit changes at least the light emission control of the lighting fixture in any one of the plurality of specific spaces, when the retention index calculated by the calculation unit exceeds a threshold value in any one of the plurality of specific spaces. The lighting controller is instructed to do so.

An environment control method according to one aspect of the present invention includes an instruction step, an acquisition step, and a calculation step. In the instruction step, instructions are given to a lighting control unit that controls light emission of lighting fixtures assigned to each of a plurality of specific spaces. In the acquisition step, information regarding users existing in each of the plurality of specific spaces is acquired. In the calculation step, a retention index of the user in each of the plurality of specific spaces is calculated based on the information regarding the user acquired in the acquisition step. In the instruction step, when the retention index calculated in the calculation step exceeds a threshold value in any one of the plurality of specific spaces, at least the light emission control of the lighting fixture in the specific space is changed. The lighting controller is instructed to do so.

A program according to one aspect of the present invention causes one or more processors to execute the above environment control method.

The environmental control system, environmental control method, and program of the present invention have the advantage that they can easily eliminate stagnation in the user's flow line.

FIG. 1A is an office in which an environmental control system according to an embodiment is used, and is a plan view showing an outline of the office before changing light emission control. FIG. 1B is a plan view showing an outline of an office in which the environmental control system according to the embodiment is used, after changing light emission control. FIG. 2 is a block diagram showing the functional configuration of the environmental control system according to the embodiment. FIG. 3 is a flowchart showing an example of the operation of the environmental control system according to the embodiment. FIG. 4 is a block diagram showing the functional configuration of an environmental control system according to modification 1 of the embodiment. FIG. 5 is a block diagram showing the functional configuration of an environmental control system according to a second modification of the embodiment.

Hereinafter, embodiments will be specifically described with reference to the drawings. Note that the embodiments described below are all inclusive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, steps, order of steps, etc. shown in the following embodiments are merely examples, and do not limit the present invention. Further, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims will be described as arbitrary constituent elements.

Note that each figure is a schematic diagram and is not necessarily strictly illustrated. Further, in each figure, substantially the same configurations are denoted by the same reference numerals, and overlapping explanations may be omitted or simplified.

(Embodiment)
[composition]
First, the configuration of an environmental control system according to an embodiment will be described. FIG. 1A is an office in which an environmental control system according to an embodiment is used, and is a plan view showing an outline of the office before changing light emission control. FIG. 1B is a plan view showing an outline of an office in which the environmental control system according to the embodiment is used, after changing light emission control. FIG. 2 is a block diagram showing the functional configuration of the environmental control system according to the embodiment.

The environmental control system 100 according to the embodiment is a system for controlling such an environment, which is used in an environment such as an office where a user can freely select a work location depending on the work he or she wants to do. In the embodiment, it is assumed that the environmental control system 100 is used in an ABW (Activity Based Working) type office. Here, "ABW" refers to a work style in which a user (employee, etc.) selects a work place, desk, etc. according to the job content. In an ABW office, users can choose a relatively quiet location when performing work that requires concentration, and choose a relaxing location such as a sofa when having a meeting. It is.

Note that the environmental control system 100 may be used not only in ABW-type offices but also in free-address-type offices, and in any environment where the user can freely select a work location depending on the work he or she wants to do. May be used in other environments. For example, the environmental control system 100 may be used in an educational facility such as an elementary school, junior high school, high school, or university, or may be used in a public facility such as a community center or library, or may be used in a store or commercial facility. may be done.

As shown in FIG. 2, the environmental control system 100 includes a lighting control section 11, an instruction section 12, an acquisition section 13, a calculation section 14, a setting section 15, and a storage section 16. Note that the environmental control system 100 only needs to include at least the instruction section 12, the acquisition section 13, and the calculation section 14, and does not need to include the lighting control section 11, the setting section 15, and the storage section 16. For example, if a lighting control system other than the environmental control system 100 is present, this lighting control system may function as the lighting control unit 11.

Furthermore, as shown in FIGS. 1A and 1B, a plurality of lighting fixtures 1 are installed in an environment where the environmental control system 100 is used (in this case, an ABW type office 3). The environmental control system 100 may be installed in the office 3 or may be installed in a remote location away from the office 3.

Each lighting fixture 1 is installed on the ceiling of an office 3. Of course, each lighting fixture 1 may be installed not only on the ceiling of the office 3 but also on a wall, floor, or desk. In the embodiment, each lighting fixture 1 is, for example, a base light as ambient lighting that uniformly illuminates a target space, and includes a light source having a solid-state light emitting element such as an LED (Light Emitting Diode). . Further, the light source of each lighting fixture 1 is configured to be capable of dimming, color adjustment, or both under control by the lighting control unit 11.

Each lighting fixture 1 is assigned to multiple groups G1. In the example shown in FIG. 2, each lighting fixture 1 is assigned to three groups G1. Of course, the number of groups G1 is not limited to three, but may be two, or four or more. Here, one or more lighting fixtures 1 assigned to the same group G1 are located close to each other. One or more lighting fixtures 1 assigned to a certain group G1 illuminate a space corresponding to the group G1 in the office 3.

For example, assume that the three groups G1 are groups "A", "B", and "C". In this case, one or more lighting fixtures 1 assigned to group "A" illuminate space "α" corresponding to group "A" in the office 3, and one or more lighting fixtures 1 assigned to group "B" illuminates space “β” corresponding to group “B” in office 3, and one or more lighting fixtures 1 assigned to group “C” illuminates space “γ” corresponding to group “C” in office 3. Illuminate.

In this way, one or more lighting fixtures 1 assigned to group G1 illuminate the space corresponding to group G1. That is, in the embodiment, the lighting control unit 11 controls the light emission of the lighting fixture 1 assigned to each of a plurality of (here, three) spaces. Here, the plurality of spaces include at least one specific space SP1 (see FIGS. 1A and 1B). The specific space SP1 is a space in which the lighting equipment 1 is controlled to emit light based on a retention index, which will be described later. In the embodiment, all of the plurality of spaces are the specific space SP1. In other words, it can be said that the lighting control unit 11 controls the light emission of the lighting fixtures 1 assigned to each of the plurality of specific spaces SP1.

The assignment of each lighting fixture 1 to the group G1 is performed in advance by, for example, the administrator of the environmental control system 100. The administrator executes the above assignment using, for example, an information terminal that can set the parameters of the environmental control system 100. The information terminal may include, for example, a smartphone, a tablet terminal, a personal computer, or the like.

Note that in the office 3, adjacent spaces may or may not be partitioned. In the embodiment, it is assumed that the office 3 consists of one large room, and there are no other rooms separated by walls or fixtures. In this case, the visibility of the office 3 is improved and the design is improved, which is preferable.

Furthermore, in the embodiment, in two adjacent spaces, the light emitted from the lighting fixture 1 installed in one space does not have to strictly illuminate only one space, and some of the light may It is allowed to leak into the other space. In other words, in any given space, the light emitted from the lighting fixture 1 corresponding to the space only needs to be the main illumination light, even if some of the illumination light from a space other than the space leaks. , it is sufficient that it has little effect on the illumination of the space. This is because at this time, the influence of a portion of the illumination light from a space different from the space on the visibility of the user using the space or the work environment viewed by the user is limited.

The lighting control unit 11 is capable of communicating with each lighting fixture 1, and controls dimming, color adjustment, or both of each lighting fixture 1 by transmitting a lighting control signal to each lighting fixture 1. In the embodiment, the lighting control unit 11 transmits the same lighting control signal to one or more lighting fixtures 1 assigned to the same group G1. That is, the lighting control unit 11 controls each lighting fixture 1 for each group G1. Communication between the lighting control unit 11 and each lighting fixture 1 may be wired communication or wireless communication, and the communication standard is not particularly limited. Further, the lighting control signals do not need to be transmitted strictly simultaneously, and the time difference between the transmission of the plurality of lighting control signals is preferably within 60 minutes, more preferably within 30 minutes, and even more preferably within 1 minute. If the time difference is within 60 minutes, it is preferable because it saves labor compared to changing the environment of the space by manually moving fixtures or furniture.

Furthermore, the lighting control signals transmitted from the lighting control unit 11 to one or more lighting fixtures 1 assigned to the same group G1 do not need to be strictly the same, and as long as the influence of the space is limited. Errors in control content are allowed. For example, the allowable range is ±500K for color temperature and ±20% for dimming rate.

The instruction unit 12 instructs the lighting control unit 11 by transmitting a control signal to the lighting control unit 11. Upon receiving the control signal from the instruction unit 12, the lighting control unit 11 controls one or more lighting fixtures 1 of each group G1, in other words, one or more lighting fixtures 1 assigned to each space, according to the content of the received control signal. Control.

The acquisition unit 13 acquires information regarding users existing in each of the plurality of specific spaces SP1. The acquisition unit 13 acquires user presence information or user identification information. When the calculation unit 14 calculates the retention index according to the [first calculation example] of the [calculation of retention index] described later, the acquisition unit 13 may be in any mode as long as it can acquire the user presence information. On the other hand, when the calculation unit 14 calculates the retention index according to the [second calculation example] of the [retention index calculation] described later, the acquisition unit 13 may be in any mode as long as it can acquire the user's identification information.

The acquisition unit 13 can acquire the user presence information by acquiring the detection result transmitted from a human sensor such as an infrared sensor installed in the specific space SP1 of the office 3, for example. That is, the acquisition unit 13 can acquire information regarding the presence or absence of a user in the specific space SP1, that is, user presence information, by acquiring the detection result of the human sensor.

In addition, the acquisition unit 13 acquires user presence information or user It is possible to obtain the identification information of

In addition, the acquisition unit 13 acquires an image of the office 3 from a camera installed in the office 3, for example, and performs appropriate image analysis processing on this image, thereby obtaining user presence information or user identification. It is possible to obtain information.

In addition, the acquisition unit 13 can acquire user presence information or user identification information, for example, by acquiring the reading result of a wireless IC tag owned by the user from a tag reader installed in the specific space SP1. be.

The calculation unit 14 calculates the retention index of the user in each of the plurality of specific spaces SP1 based on the information regarding the user acquired by the acquisition unit 13. Here, the "retention index" is an index for evaluating the specific space SP1, and is an index that correlates with changes in the number or composition of users existing in the specific space SP1 over time. For example, the retention index decreases as the frequency of change in the number of users existing in the specific space SP1 in a unit time (several tens of minutes, several hours, etc.) increases, and increases as the frequency decreases. Further, for example, the retention index decreases as the frequency of changes in the configuration of users existing in the specific space SP1 in a unit time increases, and increases as the frequency decreases. The retention index is calculated based on time information and at least one of the number of users and identification information. The method of calculating the retention index will be explained in detail in [Calculation of retention index] below.

In the specific space SP1 with a large retention index, there is a high possibility that the number or composition of users existing in the specific space SP1 will hardly change over time. On the other hand, in the specific space SP1 where the retention index is small, there is a high possibility that the number or composition of users existing in the specific space SP1 will change over time. Therefore, in the specific space SP1 where the retention index is small, an improvement in the probability of occurrence of accidental communication can be expected, for example, as expected in an ABW type office or a free address type office. Furthermore, the possibility of innovation being created through diverse communication increases, which is favorable for office managers.

The instruction unit 12 instructs the lighting control unit 11 to change the light emission control of the lighting fixture 1 in the specific space SP1 when the retention index calculated by the calculation unit 14 exceeds the threshold value. In an embodiment, the retention index is a positive real number with a maximum value of "1". The threshold value is, for example, a value of 0.5 or more, and may be set in advance by, for example, the administrator or constructor of the environmental control system 100. Further, the threshold value may be appropriately set by the setting unit 15, which will be described later.

As already mentioned, in the embodiment, there are a plurality of specific spaces SP1. Therefore, in the embodiment, when the retention index calculated by the calculation unit 14 exceeds the threshold in any one of the plurality of specific spaces SP1, the instruction unit 12 at least The lighting controller 11 is instructed to change the light emission control of the lighting fixture 1. That is, when the retention index exceeds the threshold value in any specific space SP1, the instruction unit 12 instructs to change the light emission control of the lighting fixture 1 in the specific space SP1. Of course, the instruction unit 12 may further instruct to change the light emission control of the lighting fixtures 1 in other specific spaces SP1.

The instruction unit 12 instructs the lighting control unit to change the light emission control of the lighting fixture 1 in the specific space SP1 in order to make users who are present in the specific space SP1 whose retention index exceeds the threshold aware that they tend to stay there. 11. For example, the instruction unit 12 may instruct the lighting control unit 11 to change the set value of the illuminance or color temperature of the illumination light from the lighting fixture 1 in the specific space SP1 where the retention index exceeds the threshold, or The lighting controller 11 instructs the lighting control unit 11 to switch the lighting fixture 1 from the base light to the spotlight.

For example, the instruction unit 12 instructs the lighting control unit 11 to increase or decrease the number of lighting fixtures 1 allocated to the specific space SP1 whose retention index exceeds the threshold (that is, to expand or contract the specific space SP1). It is possible to do so. In this case, the instruction unit 12 instructs the lighting control unit 11 to increase or decrease the number of lighting fixtures 1 assigned to the other specific space SP1 as the number of lighting fixtures 1 assigned to the specific space SP1 increases or decreases. do. In other words, the light emission control of the lighting fixtures 1 includes control to change the set value of illuminance or color temperature, control to increase or decrease the number of lighting fixtures 1 assigned to the specific space SP1 whose retention index exceeds a threshold value, or control to irradiate spot light. may include controls to Note that control for irradiating spotlights can be executed only when the lighting fixture 1 includes a spotlight in addition to the base light.

In particular, in the embodiment, the instruction unit 12 changes the light emission control of the lighting fixture 1 in the specific space SP1 in order to prompt the user of the specific space SP1 whose retention index exceeds the threshold to move to another space. The lighting control unit 11 is instructed to do so. That is, the light emission control of the lighting fixture 1 may include control that prompts the user to move to a space other than the specific space SP1 where the retention index exceeds the threshold value.

For example, assume that before the retention index exceeds the threshold, the color temperature of the illumination light in the specific space SP1 is relatively low and the illumination is warm-colored. In this case, the instruction section 12 instructs the illumination control section 11 to increase the color temperature of the illumination light in this specific space SP1. As a result, the color temperature of the illumination light in this specific space SP1 becomes relatively high, resulting in cool color illumination. Then, it can be expected that a user who has stayed in this specific space SP1 because he prefers warm-colored lighting will be more likely to move to another space in search of warm-colored lighting.

Further, for example, it is assumed that the specific space SP1 was uniformly illuminated by the base light before the retention index exceeded the threshold value. In this case, the instruction unit 12 instructs the lighting control unit 11 to switch the lighting fixture 1 in this specific space SP1 from the base light to the spotlight. Thereby, this specific space SP1 comes to be illuminated with spotlight light. Then, it can be expected that the user who has stayed in this specific space SP1 because he prefers uniform illumination will be more likely to move to another space in search of uniform illumination.

Here, if the environment of the specific space SP1 whose retention index exceeds the threshold changes as described above, a user who is in another space other than the specific space SP1 may prefer the environment of the specific space SP1. There is a possibility of moving to the specific space SP1. That is, it can be said that the light emission control of the lighting fixture 1 may include control that prompts the user to move to the specific space SP1 from a space other than the specific space SP1 where the retention index exceeds the threshold value.

For example, when the number of lighting fixtures 1 allocated to the specific space SP1 whose retention index exceeds the threshold increases, the specific space SP1 is expanded and a vacant space is created in the specific space SP1. In this case, it can be expected that there is a high possibility that a user who has been staying in another space will move to the specific space SP1 to use the empty space in the specific space SP1.

Hereinafter, a specific example of an instruction by the instruction unit 12 to change the light emission control of the lighting fixture 1 in the specific space SP1 will be described using FIGS. 1A and 1B. In the following, in FIGS. 1A and 1B, the specific space SP1 at the lower left of office 3 is referred to as "first space SP11", the space at the upper right of office 3 is referred to as "second space SP12", and the space at the lower right of office 3 is referred to as "first space SP11". will be described as "third space SP13".

In the example shown in FIG. 1A, each lighting fixture 1 in the first space SP11 is arranged so that the color temperature of the illumination light is lower (here, 3000K) than the reference color temperature (here, 5000K) and provides warm color illumination. is controlled. Furthermore, in the example shown in FIG. 1A, each lighting fixture 1 is controlled so that the second space SP12 is illuminated in a cool color with a color temperature higher than the reference color temperature (here, 6000K). There is. Moreover, in the example shown in FIG. 1A, in the third space SP13, each lighting fixture 1 is controlled so that the color temperature of the illumination light becomes the reference color temperature.

Here, it is assumed that the retention index exceeds the threshold value in the first space SP11. Then, the instruction unit 12 instructs the illumination control unit 11 to make the color temperature of the illumination light in the first space SP11 higher than the reference color temperature (here, 6000K) as shown in FIG. 1B. At this time, the instruction unit 12 instructs to change the light emission control also for the second space SP12 and the third space SP13 whose retention index does not exceed the threshold value. Specifically, as shown in FIG. 1B, the instruction unit 12 causes the color temperature of the illumination light in the third space SP13 to be set to the reference color temperature so that the color temperature of the illumination light in the second space SP12 is the reference color temperature. The lighting control unit 11 is instructed to set the temperature lower than (in this case, 3000K).

As a result, it can be expected that the user who has been staying in the first space SP11 will be more likely to move from the first space SP11, where the lighting environment is opposite to that before the light emission control was changed. In addition, since the lighting environment of the second space SP12 and the third space SP13 after the light emission control change is close to the lighting environment of the first space SP11 before the light emission control change, the user moves to either of these spaces SP12 or SP13. It can be expected that the possibility of doing so will increase.

The setting unit 15 sets a threshold value used by the calculation unit 14 in response to input from the user. The user can input information for setting the threshold using, for example, an information terminal used by the user. The threshold value input at the information terminal is transmitted from the information terminal to the environmental control system 100. Then, the setting unit 15 updates the threshold value received from the information terminal as the threshold value used by the calculation unit 14. Thereby, it is possible to reflect the user's subjectivity in determining whether or not the user is staying in the specific space SP1.

Note that it is preferable that only authorized users among users can set the threshold value in the setting unit 15. In this case, it is preferable that the authority be given to the administrator of the environmental control system 100, for example. Moreover, as already mentioned, the threshold value may be set in advance by, for example, the administrator or the installer of the environmental control system 100. In this case, the setting section 15 is unnecessary.

The storage unit 16 is a storage device that stores information (computer programs, etc.) necessary for the lighting control unit 11, instruction unit 12, calculation unit 14, etc. to operate. The storage unit 16 is realized by, for example, an HDD (Hard Disk Drive), but may also be realized by a semiconductor memory, and known electronic information storage means can be used without particular limitation.

The lighting control section 11, the instruction section 12, the acquisition section 13, the calculation section 14, the setting section 15, and the storage section 16 may all be mounted on the same board or housed in the same housing. . The board or casing may be installed on the ceiling, wall, floor, or fixtures/furniture of the office 3, such as a desk. In this case, the environmental control system 100 is preferably miniaturized.

[Calculation of retention index]
Examples of calculations of the retention index by the calculation unit 14 will be listed below.

[First calculation example]
In the first calculation example, the retention index is calculated based on the number of users existing in the specific space SP1 at any given time. The number of users can be calculated based on user presence information acquired by the acquisition unit 13.

Specifically, the acquisition unit 13 periodically acquires user presence information. Thereby, the acquisition unit 13 periodically acquires data in which the time and the number of users existing in the specific space SP1 at the time are linked. That is, the acquisition unit 13 acquires user presence information at an arbitrary time in each specific space SP1 as information regarding the user. Then, the calculation unit 14 calculates a retention index based on the data acquired by the acquisition unit 13. That is, the calculation unit 14 calculates the retention index of the user in each of the plurality of specific spaces SP1 based on the presence information acquired by the acquisition unit 13.

An example of calculation of the retention index in any two specific spaces SP1 will be explained using Table 1 below. Hereinafter, one of the two specific spaces SP1 will be referred to as a "first specific space", and the other specific space SP1 will be referred to as a "second specific space". The "first calculated value" in Table 1 represents the amount of change in the number of users in the specific space SP1 over time. Here, the "first calculation value" is the number of users in the specific space SP1 at an arbitrary time acquired by the acquisition unit 13, and the number of users in the specific space SP1 at the time immediately before the time acquired by the acquisition unit 13. It is the absolute value of the difference between the number of users and .

For example, the first calculated value in the first specific space at 10:00 is the number of users in the first specific space at 10:00 "9" and the number of users in the first specific space at 9:00 " 10'' and the absolute value of the difference is ``1''. Also, for example, the first calculated value in the second specific space at 12:00 is the number of users "6" in the second specific space at 12:00, and the number of users in the second specific space at 11:00. The absolute value of the difference between the number of people "2" and the number "2" is "4".

The calculation unit 14 calculates the retention index at predetermined intervals. Here, the predetermined time is 3 hours, and in the example shown in Table 1, it is 9:00 to 12:00. First, the calculation unit 14 calculates a second calculation value at a predetermined time by calculating the sum of the first calculation values at each time in a predetermined time. In the example shown in Table 1, the second calculated value in the first specific space from 9:00 to 12:00 is "1+1+1=3", which is the sum of the first calculated values in the first specific space. Furthermore, in the example shown in Table 1, the second calculated value in the second specific space from 9:00 to 12:00 is "6+8+4=18" which is the sum of the first calculated values in the second specific space. .

Then, the calculation unit 14 calculates the retention index at the predetermined time by calculating the reciprocal of the second calculation value at the predetermined time. In the example shown in Table 1, the second calculated value in the first specific space from 9:00 to 12:00 is "3", so the retention index in the first specific space from 9:00 to 12:00 is , "1/3≒0.33". In addition, in the example shown in Table 1, since the second calculated value in the second specific space from 9:00 to 12:00 is "18", the residence time in the second specific space from 9:00 to 12:00 is The index is "1/18≒0.06".

Note that when the second calculated value is "0", the retention index is "1" divided by "0", but in the embodiment, the retention index in this case is "infinity". shall be.

Here, the larger the retention index, the more likely the user is to stay in the specific space SP1, and the smaller the retention index, the more likely the user is to stay in the specific space SP1. Therefore, in the example shown in Table 1, from 9:00 to 12:00, users tend to stay in the first specific space, while users do not stay in the second specific space. In other words, in the example shown in Table 1, from 9:00 to 12:00, the second specific space has a high probability of occurrence of accidental communication, which is expected in an ABW type office or a free address type office. It can be said that this is a space that can be expected to improve.

[Second calculation example]
In the second calculation example, the retention index is calculated based on the identification information of users existing in the specific space SP1 at any time. The user's identification information can be acquired by the acquisition unit 13.

Specifically, the acquisition unit 13 periodically acquires user identification information. Thereby, the acquisition unit 13 periodically acquires data in which the time and the identification information of the user existing in the specific space SP1 at the time are linked. That is, the acquisition unit 13 acquires user identification information at an arbitrary time as information regarding the user. Then, the calculation unit 14 calculates a retention index based on the data acquired by the acquisition unit 13. That is, the calculation unit 14 calculates the retention index of the user in the specific space SP1 for each user based on the identification information acquired by the acquisition unit 13.

An example of calculation of the retention index in any two specific spaces SP1 (here, the first specific space and the second specific space) will be described using Table 2 below. In Table 2, "user ID" represents user identification information. In the example shown in Table 2, the "user ID" is represented by a three-digit number. Of course, the "user ID" may be represented by, for example, a character string such as the alphabet, or a combination of numbers and characters.

Further, the "third calculated value" in Table 2 represents the amount of change in the user's identification information in the specific space SP1 over time. Here, the "third calculation value" includes the identification information of the user in the specific space SP1 at an arbitrary time acquired by the acquisition unit 13, and the specific space SP1 at the time immediately before the time acquired by the acquisition unit 13. This is the absolute value of the number of identification information that differs from the user's identification information in .

For example, the user IDs in the first specific space at 10:00 are "001", "002", and "003", while the user IDs in the first specific space at 9:00 are "001", They are "002" and "003". Therefore, since there is no difference in user identification information between 9:00 and 10:00, the third calculated value in the first specific space at 10:00 is "0". Further, for example, the user IDs in the second specific space at 10:00 are "004", "007", and "010", whereas the user ID in the second specific space at 9:00 is "004". ”, “005”, and “006”. Therefore, there is no difference in the number of users in the second specific space between 9:00 and 10:00, but two users have been replaced, so the third calculation in the second specific space at 10:00 The value will be "2".

The calculation unit 14 calculates the retention index at predetermined intervals. Here, the predetermined time is 3 hours, and in the example shown in Table 2, it is 9:00 to 12:00. First, the calculation unit 14 calculates the fourth calculation value at a predetermined time by calculating the sum of the third calculation values at each time in the predetermined time. In the example shown in Table 2, the fourth calculated value in the first specific space from 9:00 to 12:00 is "0+0+1=1", which is the sum of the third calculated values in the first specific space. Furthermore, in the example shown in Table 2, the fourth calculated value in the second specific space from 9:00 to 12:00 is "2+2+2=6", which is the sum of the third calculated values in the second specific space. .

Then, the calculation unit 14 calculates the retention index at the predetermined time by calculating the reciprocal of the fourth calculation value at the predetermined time. In the example shown in Table 2, the fourth calculated value in the first specific space from 9:00 to 12:00 is "1", so the retention index in the first specific space from 9:00 to 12:00 is , "1/1=1". In addition, in the example shown in Table 2, the fourth calculated value in the second specific space between 9:00 and 12:00 is "6", so the residence time in the second specific space between 9:00 and 12:00 is The index is "1/6≒0.17".

Note that when the fourth calculation value is "0", the retention index is "1" divided by "0", but in the embodiment, the retention index in this case is "infinity". shall be.

Here, the larger the retention index, the more likely the user is to stay in the specific space SP1, and the smaller the retention index, the more likely the user is to stay in the specific space SP1. Therefore, in the example shown in Table 2, from 9:00 to 12:00, users tend to stay in the first specific space, while users do not stay in the second specific space. In other words, in the example shown in Table 2, from 9:00 to 12:00, the second specific space has a high probability of occurrence of accidental communication, which is expected in an ABW type office or a free address type office. It can be said that this is a space that can be expected to improve.

The above-mentioned method of calculating the retention index is just an example, and the retention index may be calculated using other methods. For example, the above-mentioned first calculation value is the number of users in the specific space SP1 at an arbitrary time acquired by the acquisition unit 13, and the number of users in the specific space SP1 at the time immediately before the time acquired by the acquisition unit 13. It may be a quotient when divided by the number of users. Further, for example, the second calculated value may be an integral value of the first calculated value over a predetermined period of time. Further, the retention index may be calculated by combining the calculation method in the first calculation example and the calculation method in the second calculation example described above.

[motion]
An example of the operation of the environmental control system 100 according to the embodiment will be described below. FIG. 3 is a flowchart showing an example of the operation of the environmental control system 100 according to the embodiment. In the following, it is assumed that the threshold used by the calculation unit 14 is set in advance. Further, in the following, it is assumed that the lighting control unit 11 controls the light emission of each lighting fixture 1 for each group G1. Furthermore, the following description focuses on one specific space SP1 among the plurality of specific spaces SP1.

First, the acquisition unit 13 periodically acquires information regarding users existing in the specific space SP1 (S1). Processing S1 corresponds to acquisition step ST1 of the environmental control method. When a predetermined time (for example, 3 hours) has passed since the acquisition unit 13 started acquiring information (S2: Yes), the calculation unit 14 calculates the retention index based on the information acquired by the acquisition unit 13. is calculated (S3). Processing S3 corresponds to calculation step ST3 of the environmental control method.

Then, if the retention index calculated by the calculation unit 14 does not exceed the threshold value (S4: No), the instruction unit 12 does not perform anything in particular. That is, the light emission control of each lighting fixture 1 by the lighting control unit 11 is not changed. On the other hand, when the retention index calculated by the calculation unit 14 exceeds the threshold (S4: Yes), the instruction unit 12 instructs the lighting control unit 11 to change the light emission control of the lighting fixture 1 in the specific space SP1. Instruct (S5). Process S5 corresponds to instruction step ST1 of the environmental control method. Thereby, the lighting environment of the specific space SP1 is changed. Thereafter, the series of processes S1 to S5 described above are repeated.

[advantage]
The advantages of the environmental control system 100 according to the embodiment will be explained below. In the environmental control system 100 according to the embodiment, when the retention index of the user in any one of the plurality of specific spaces SP1 exceeds a threshold, that is, when the user tends to stay in the specific space SP1, The lighting environment of the specific space SP1 is changed. Therefore, there is an advantage that the user staying in the specific space SP1 can be given an opportunity to move to another space, and it becomes easier to eliminate the stagnation of the user's flow line. As a result, as users who tend to stay in the specific space SP1 move to other spaces, the probability of accidental communication occurring, such as that expected in ABW-type offices or free address-type offices, is reduced. We can expect improvement. We can also expect that the possibility of innovation being created through diverse communication will increase.

Furthermore, in the environmental control system 100 according to the embodiment, by changing the lighting environment of at least the specific space SP1 whose retention index exceeds the threshold value, it is possible to make the lighting environment of each of the plurality of specific spaces SP1 different, A so-called zoning effect can be expected.

Here, the zoning effect means, for example, a sense of separation in the perception of space, and may include an effect that makes it easier for the user to recognize that a plurality of spaces are different from each other in terms of appearance. Furthermore, the zoning effect may include an effect that, when recognized by the user, facilitates a change in the user's behavior or flow line as intended by the zoning. For example, assume that an arbitrary space is zoned with the intention of making it easier for the user to perform tasks that require concentration. In this case, if the user who viewed the space uses the space primarily to perform tasks that require concentration, it can be said that the zoning effect has been achieved.

In addition, zoning effect includes the effect that the user's subjective effect/feeling or physiological/psychological/biological effects tend to show in accordance with the purpose of zoning when the user actually uses the zoned space. obtain. For example, assume that an arbitrary space is zoned with the intention of making it easier to perform tasks that require concentration, and a user uses the space. In this case, if the user feels that they were able to concentrate by using the space, or if indicators and data that suggest that the user was concentrating due to psychological and biological effects are obtained, the zoning effect can be improved. It can be said that it was demonstrated.

By controlling the lighting as described above, it is possible to zone each specific space SP1 without using fixtures or furniture. Therefore, the design of each specific space SP1 can be easily enhanced, and the layout of the office 3 can be instantly changed by lighting control such as dimming and color adjustment, which is what is called active zoning. That is, when zoning is performed by the above-mentioned lighting control, changing the control parameters for dimming and color adjustment in each specific space SP1 is completed in, for example, several seconds. In this case, as a result, it is possible to change the layout of the office 3 in a few seconds. Here, if the layout of the office 3 is to be changed by manually moving fixtures or furniture, it may take 60 minutes, several hours, one day, or even several days in some cases. From this point of view, the above-mentioned zoning based on lighting control can have extremely significant effects.

With active zoning, it is possible to change the layout of Office 3 on a short cycle, such as hourly, daily, or monthly, compared to conventional changes in the office layout by changing the arrangement of fixtures or furniture. It is.

(Other embodiments)
Although the embodiments have been described above, the present invention is not limited to the above embodiments. Modifications of the embodiment will be listed below. The modifications described below may be combined as appropriate.

[Modification 1 of the embodiment]
The environment control system 100 according to the first modification of the embodiment differs from the embodiment in that a plurality of audio devices 2 are installed in the office 3, and the instruction unit 12 instructs the audio control unit 17. This is different from the environmental control system 100 according to the above. FIG. 4 is a block diagram showing the functional configuration of the environmental control system 100 according to the first modification of the embodiment. Note that the environmental control system 100 does not need to include the acoustic control section 17. For example, if a sound control system separate from the environmental control system 100 is present, this sound control system can function as the sound control unit 17.

Each audio device 2 is installed on the ceiling of the office 3. Of course, each audio device 2 may be installed not only on the ceiling of the office 3 but also on a wall, floor, or desk. In the embodiment, each audio device 2 is, for example, a non-directional speaker, and reproduces content transmitted from the audio control unit 17. Note that each acoustic device 2 may be a directional speaker such as a parametric speaker, a speaker using ultrasonic waves, or a speaker whose housing has a horn structure. It is preferable to use a directional speaker because it helps to reduce the rate at which some sounds leak into other spaces.

Each acoustic device 2, like each lighting fixture 1, is assigned to a plurality of groups G1. In the example shown in FIGS. 1 and 2, each audio device 2 is assigned to three groups G1. Here, one or more audio devices 2 assigned to the same group G1 are located close to each other. One or more audio devices 2 assigned to a certain group G1 output sound to a space corresponding to the group G1 in the office 3.

For example, assume that the three groups G1 are groups "A", "B", and "C". In this case, one or more audio devices 2 assigned to group "A" output sound to space "α" corresponding to group "A" in office 3, and one or more audio devices 2 assigned to group "B" output sound to space "α" corresponding to group "A" in office 3. The audio device 2 outputs sound to the space “β” corresponding to the group “B” in the office 3, and the one or more audio devices 2 assigned to the group “C” correspond to the group “C” in the office 3. The sound is output to the space "γ".

The assignment of each acoustic device 2 to the group G1 is performed in advance by the administrator of the environmental control system 100 using an information terminal, similarly to the assignment of each lighting fixture 1 to the group G1.

Note that in two adjacent spaces, the sound output from the acoustic device 2 installed in one space does not have to be output only to one space, and some of the sound may leak into the other space. That is allowed. In other words, in any given space, the main sound only needs to be the sound output from the acoustic device 2 corresponding to the space, and even if some of the sound from a space other than the space leaks, It should not affect the acoustics of the space.

The audio control unit 17 is capable of communicating with each audio device 2, and causes each audio device 2 to play content by transmitting an audio control signal (including content to be played) to each audio device 2. Control. Here, the audio control unit 17 transmits the same audio control signal to one or more audio devices 2 assigned to the same group G1. That is, the audio control unit 17 controls each audio device 2 for each group G1. Communication between the audio control unit 17 and each audio device 2 may be wired communication or wireless communication, and the communication standard is not particularly limited.

Further, the content may be stored in the audio control unit 12, each audio device 2, or the storage unit 16. The content is stored in an electronic data medium such as, for example, a WAV format or an mp3 format, but is not limited thereto, and may be stored in any known storage method such as, for example, a compact disc (CD).

The instruction section 12 instructs the sound control section 17 by transmitting a control signal to the sound control section 17 . Upon receiving the control signal from the instruction unit 12, the audio control unit 17 controls one or more audio devices 2 of each group G1, in other words, one or more audio devices 2 assigned to each space, according to the content of the received control signal. Control. That is, the instruction unit 12 is configured to instruct the audio control unit 17 that controls the output of the audio device 2 assigned to each of the plurality of specific spaces SP1.

Then, when the retention index calculated by the calculation unit 14 exceeds a threshold value in any one of the plurality of specific spaces SP1, the instruction unit 12 at least outputs the output of the audio device 2 in the specific space SP1. The audio controller 17 is instructed to change the control. For example, if music, etc. is not being played in the specific space SP1 before the retention index exceeds the threshold, the instruction unit 12 instructs the sound control unit 17 to play some music, etc. in the specific space SP1. . On the other hand, if music etc. are already being played in the specific space SP1 before the retention index exceeds the threshold, the instruction unit 12 causes the sound control unit 17 to instruct the sound control unit 17 to play music etc. having the opposite property in the specific space SP1. give instructions to

As mentioned above, since the sound is output to the specific space SP1, users who tend to stay in the specific space SP1 are more likely to be given an opportunity to move to other specific spaces SP1, and the flow line of the users is changed. This has the advantage of making it easier to eliminate stagnation.

[Modification 2 of embodiment]
As shown in FIG. 5, the environmental control system 100 according to the second modification of the embodiment differs from the environmental control system 100 according to the embodiment in that it includes a notification section 18. FIG. 5 is a block diagram showing the functional configuration of an environmental control system 100 according to a second modification of the embodiment.

The notification unit 18 notifies the user of information regarding the retention index calculated by the calculation unit 14. For example, the notification unit 18 generates a heat map, a graph, etc. (hereinafter simply referred to as "map etc.") which is a plan view of the office 3 and visualizes the retention index of the specific space SP1. Then, the notification unit 18 transmits the generated map etc. to the information terminal used by the user. Thereby, the user can grasp the degree of stagnation in the specific space SP1 by checking the map etc. received on the information terminal.

Further, the notification unit 18 may transmit the generated map or the like to a projector installed in the office 3. In this case, the projector projects the received map or the like onto the screen. Thereby, the user can grasp the degree of stagnation in the specific space SP1 by checking the map etc. projected on the screen. Note that the projector may project the map onto the wall or ceiling of the office 3 instead of the screen.

In addition, instead of transmitting a map or the like, the notification unit 18 may notify the user of a message or audio content indicating the degree of residence in the specific space SP1. Of course, the notification unit 18 may notify the user by appropriately combining the map, message, and audio content described above.

[Other variations]
In the embodiment, the retention index is calculated every 3 hours, but the retention index may be calculated at a shorter period or at a longer period.

In the embodiment, the calculation unit 14 calculates the retention index regardless of the user, but the invention is not limited to this. For example, the calculation unit 14 may calculate the retention index for each user based on the user identification information acquired by the acquisition unit 13. In this case, it is possible to focus on a specific user and give the specific user staying in the specific space SP1 an opportunity to move to another space.

In the embodiment, the office 3 is composed of one large room with no other rooms, but the present invention is not limited to this. For example, the office 3 may be composed of a large room having one or more rooms, or may be composed of multiple floors.

In the embodiment, the environmental control system 100 targets one office 3, but is not limited to this. For example, the environmental control system 100 may target a plurality of offices 3 and control each lighting fixture 1 for each office 3.

Although the lighting fixture 1 is not included in the components of the environmental control system 100 in the embodiment, the lighting fixture 1 may be included in the components of the environment control system 100. Similarly, although the audio device 2 is not included in the components of the environmental control system 100 in the first modification of the embodiment, the audio device 2 may be included in the components of the environmental control system 100.

Further, for example, in the above embodiment, the environmental control system 100 is realized by a plurality of devices, but it may be realized as a single device. For example, the environmental control system 100 may be implemented as a single device corresponding to a server device. When the environmental control system 100 is realized by a plurality of devices, the components included in the environmental control system 100 may be distributed to the plurality of devices in any manner. For example, the components included in the server device in the above embodiments may be included in an information terminal installed in a closed space. That is, the present invention may be realized by cloud computing or edge computing.

For example, the communication method between devices in the above embodiment is not particularly limited. Further, in communication between devices, a relay device (not shown) may intervene.

Furthermore, in the embodiments described above, each component may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

Moreover, each component may be realized by hardware. For example, each component may be a circuit (or integrated circuit). These circuits may constitute one circuit as a whole, or may be separate circuits. Further, each of these circuits may be a general-purpose circuit or a dedicated circuit.

Further, general or specific aspects of the present invention may be implemented in a system, apparatus, method, integrated circuit, computer program, or computer readable recording medium such as a CD-ROM. Further, the present invention may be realized by any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

For example, the present invention may be realized as an environment control method executed by a computer such as the environment control system 100, or may be realized as a program for causing a computer to execute such an environment control method. It may be realized as a computer-readable non-transitory recording medium in which such a program is recorded.

Other embodiments may be obtained by making various modifications to each embodiment that those skilled in the art can think of, or by arbitrarily combining the components and functions of each embodiment without departing from the spirit of the present invention. The present invention also includes such forms.

(summary)
As described above, the environmental control system 100 includes the instruction section 12, the acquisition section 13, and the calculation section 14. The instruction unit 12 instructs the lighting control unit 11 that controls the light emission of the lighting fixtures 1 assigned to each of the plurality of specific spaces SP1. The acquisition unit 13 acquires information regarding users existing in each of the plurality of specific spaces SP1. The calculation unit 14 calculates the retention index of the user in each of the plurality of specific spaces SP1 based on the information regarding the user acquired by the acquisition unit 13. When the retention index calculated by the calculation unit 14 exceeds a threshold value in any one of the plurality of specific spaces SP1, the instruction unit 12 controls at least the light emission control of the lighting fixture 1 in the specific space SP1. The illumination control unit 11 is instructed to make the change.

According to such an environmental control system 100, users who tend to stay in the specific space SP1 can be given an opportunity to move to another space, making it easier to eliminate the stagnation in the user's flow line. There is an advantage.

Further, for example, in the environmental control system 100, the acquisition unit 13 acquires, as information regarding the user, presence information of the user at an arbitrary time in each of the plurality of specific spaces SP1. The calculation unit 14 calculates the retention index of the user in each of the plurality of specific spaces SP1 based on the presence information acquired by the acquisition unit 13.

According to such an environmental control system 100, since the retention index is calculated based on the user's stay time, which is relatively easy to obtain, there is an advantage that it is easy to determine the degree of the user's retention in the specific space SP1.

Further, for example, in the environmental control system 100, the acquisition unit 13 acquires user identification information at an arbitrary time as information regarding the user. The calculation unit 14 calculates the retention index of the user in each of the plurality of specific spaces SP1 based on the identification information acquired by the acquisition unit 13.

According to such an environment control system 1000, since the retention index is calculated based on user identification information that is relatively easy to obtain, there is an advantage that it is easy to determine the degree of retention of the user in the specific space SP1.

For example, in the environmental control system 100, the light emission control of the lighting fixtures 1 includes control to change the set value of illuminance or color temperature, and control to increase or decrease the number of lighting fixtures 1 allocated to the specific space SP1 whose retention index exceeds a threshold value. control, or control to irradiate spot light.

According to such an environment control system 100, there is an advantage that a user who tends to stay in the specific space SP1 can easily visually grasp changes in the lighting environment of the specific space SP1.

For example, in the environmental control system 100, the light emission control of the lighting fixture 1 includes control that prompts the user to move to a space other than the specific space SP1 where the retention index exceeds the threshold value.

According to such an environment control system 100, there is an advantage that a user who tends to stay in the specific space SP1 can easily move to another space. In addition, in such an environmental control system 100, for example, in order to reduce the risk of infection in the specific space SP1 where the retention index exceeds the threshold, the illuminance of the specific space SP1 may be lowered, the lights may be turned on and off, etc. Active control may be performed to encourage the user to move. By performing such control, there is an advantage that it becomes easier to eliminate situations where multiple users are in close contact with each other or crowd together, and it becomes easier to reduce the risk of infection.

For example, in the environmental control system 100, the light emission control of the lighting fixture 1 includes control that prompts the user to move to the specific space SP1 from a space other than the specific space SP1 where the retention index exceeds the threshold value.

According to such an environment control system 100, there is an advantage that it is easy to stimulate the movement of the user.

Further, for example, in the environmental control system 100, the instruction unit 12 is configured to instruct the audio control unit 17 that controls the output of the audio device 2 assigned to each of the plurality of specific spaces SP1. When the retention index calculated by the calculation unit 14 exceeds a threshold value in any one of the plurality of specific spaces SP1, the instruction unit 12 controls at least the output control of the audio device 2 in the specific space SP1. The sound control section 17 is instructed to change it.

According to such an environmental control system 100, since the sound is output to the specific space SP1, it becomes easier to give a user who tends to stay in the specific space SP1 an opportunity to move to another specific space SP1. This has the advantage that it becomes easier to eliminate stagnation in the user's flow line.

For example, the environmental control system 100 further includes a notification unit 18 that notifies the user of information regarding the retention index calculated by the calculation unit 14.

According to the environmental control system 100, it is possible for the user to grasp the degree of stagnation in the specific space SP1.

Furthermore, for example, the environmental control system 100 further includes a setting unit 15 that sets a threshold value used by the calculation unit 14 in accordance with an input from a user.

According to such an environmental control system 100, it is possible to reflect the user's subjectivity in determining whether or not the user is staying in the specific space SP1.

Further, for example, the environmental control method includes an instruction step ST1, an acquisition step ST2, and a calculation step ST3. In the instruction step ST1, instructions are given to the lighting control unit 11 that controls the light emission of the lighting fixtures 1 assigned to each of the plurality of specific spaces SP1. In the acquisition step ST2, information regarding users existing in each of the plurality of specific spaces SP1 is acquired. In the calculation step ST3, the retention index of the user in each of the plurality of specific spaces SP1 is calculated based on the information regarding the user acquired in the acquisition step ST2. In the instruction step ST1, when the retention index calculated in the calculation step ST3 exceeds the threshold value in any one of the plurality of specific spaces SP1, at least the light emission control of the lighting fixture 1 in the specific space SP1 is controlled. The illumination control unit 11 is instructed to make the change.

According to such an environment control method, users who tend to stay in the specific space SP1 can be given an opportunity to move to another space, making it easier to eliminate the stagnation in the user flow line. There are advantages.

Also, for example, the program causes one or more processors to execute the environment control method described above.

According to such a program, it is possible to give an opportunity for users who tend to stay in the specific space SP1 to move to another space, and the advantage is that it becomes easier to eliminate the stagnation in the user's flow line. be.

100 Environmental control system 11 Lighting control unit 12 Instruction unit 13 Acquisition unit 14 Calculation unit 15 Setting unit 17 Sound control unit 18 Notification unit 1 Lighting equipment 2 Sound device SP1 Specific space ST1 Instruction step ST2 Acquisition step ST3 Calculation step

Claims (11)

an instruction unit that instructs a lighting control unit that controls light emission of lighting fixtures assigned to each of the plurality of specific spaces;
an acquisition unit that acquires information regarding users existing in each of the plurality of specific spaces;
a calculation unit that calculates a retention index of the user in each of the plurality of specific spaces based on information regarding the user acquired by the acquisition unit;
The retention index is an index for evaluating the corresponding specific space, and is correlated with changes in the number or composition of the users existing in the specific space over time,
The instruction unit changes at least the light emission control of the lighting fixture in any one of the plurality of specific spaces, when the retention index calculated by the calculation unit exceeds a threshold value in any one of the plurality of specific spaces. instructing the lighting control unit to
Environmental control system. The acquisition unit acquires presence information of the user at an arbitrary time in each of the plurality of specific spaces as information regarding the user;
The calculation unit calculates a retention index of the user in each of the plurality of specific spaces based on the presence information acquired by the acquisition unit.
The environmental control system according to claim 1. The acquisition unit acquires identification information of the user at an arbitrary time as information regarding the user,
The calculation unit calculates a retention index of the user in each of the plurality of specific spaces based on the identification information acquired by the acquisition unit.
The environmental control system according to claim 2. The light emission control of the lighting fixtures includes control to change the set value of illuminance or color temperature, control to increase or decrease the number of lighting fixtures 1 allocated to the specific space SP1 whose retention index exceeds a threshold value, or control to irradiate spot light. including,
The environmental control system according to any one of claims 1 to 3. The light emission control of the lighting equipment includes control that prompts the user to move to a space other than the specific space where the retention index exceeds a threshold.
The environmental control system according to any one of claims 1 to 4. The light emission control of the lighting equipment includes control that prompts the user to move to the specific space from a space other than the specific space where the retention index exceeds the threshold.
The environmental control system according to any one of claims 1 to 4. The instruction unit is configured to instruct an audio control unit that controls an output of an audio device assigned to each of the plurality of specific spaces,
The instruction unit changes at least the output control of the acoustic device in any one of the plurality of specific spaces, when the retention index calculated by the calculation unit exceeds a threshold value in any one of the plurality of specific spaces. instructing the sound control unit to
The environmental control system according to any one of claims 1 to 6. further comprising a notification unit that notifies the user of information regarding the retention index calculated by the calculation unit;
The environmental control system according to any one of claims 1 to 7. further comprising a setting unit that sets the threshold value used in the calculation unit according to an input from the user;
The environmental control system according to any one of claims 1 to 8. an instruction step for instructing a lighting control unit that controls light emission of lighting fixtures assigned to each of the plurality of specific spaces;
an acquisition step of acquiring information regarding users existing in each of the plurality of specific spaces;
a calculation step of calculating a retention index of the user in each of the plurality of specific spaces based on the information regarding the user acquired in the acquisition step,
The retention index is an index for evaluating the corresponding specific space, and is correlated with changes in the number or composition of the users existing in the specific space over time,
In the instruction step, when the retention index calculated in the calculation step exceeds a threshold value in any one of the plurality of specific spaces, at least the light emission control of the lighting fixture in the specific space is changed. instructing the lighting control unit to
Environmental control methods. one or more processors,
Executing the environmental control method according to claim 10,
program.

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