JP5975261B2 - Lighting control system and lighting control method - Google Patents

Description

  The present invention relates to an illumination control system and an illumination control method for illuminating a space with a lamp.

When a plurality of lamps illuminate a space, if there are a plurality of people in the space, it is considered that each person has a favorite illuminance. For example, in an office space where a plurality of desks used by different people are arranged, there is a case where each person wants to illuminate the desk surface of his / her seat with his / her favorite illuminance. In such a case, for example, there is a method in which the ambient illuminance for illuminating the whole is lowered by a task ambient lighting method, and each seat is dimmed by task lighting such as a desk stand.
Patent Document 1 describes a light control system in which a lighting load for each of a plurality of lighting scenes in a living room space is determined in advance and light is adjusted according to the lighting scene.

Japanese Patent Laid-Open No. 2001-167891

  However, when adjusting the lighting rate of the lamp installed on the ceiling and performing illuminance control according to each individual preference, there is an illuminance effect on the vicinity when changing the lighting rate of a specific lamp, so that people Illuminance control according to the situation is necessary, for example, when the seat is moved or the favorite illuminance is changed. As described above, even when the same space is illuminated by a plurality of lamps installed on the ceiling, it is desirable to perform illuminance control according to the preference of the person in the space for each point in the space. In addition to changing the lighting rate of a specific lamp, it is also possible to use daylight introduced into the office space from the outside so that the desired illuminance can be obtained for each person in the office space. . In this case, since daylight fluctuates according to the weather and time zone of the day, it is necessary to control the illuminance in consideration of this fluctuation.

  The present invention has been made in view of such a situation, and when illuminating the same space with a plurality of lamps, the illuminance according to the user's preference in consideration of daylight, the place where a person is in the space A lighting control system and a lighting control method are provided.

In order to solve the above-described problem, the present invention is an illumination control system for controlling a lamp provided in a room where daylight can be introduced, and obtains illuminance information for obtaining skylight illuminance and direct light illuminance in the room. A storage unit that stores a skylight daylight rate and a direct sunlight daylight rate for each position of an illumination target in the living room in association with a sun position with respect to a window that introduces daylight into the living room, and the window A solar position acquisition unit that acquires a solar position with respect to the sky, and a skylight daylight rate and a direct light daylight rate for each position of the illumination target in the living room corresponding to the solar position acquired by the sun position acquisition unit Based on the skylight daylight rate and the direct light daylight rate read out from the storage unit, and the skylight illuminance and the direct light illuminance acquired by the illuminance information acquisition unit, the daylight illuminance for each position in the living room is calculated. Calculate the daylight illuminance calculation Unit, a demand illuminance acquisition unit that acquires a position of an illumination target and a demand illuminance that is necessary illuminance at the position, a demand illuminance acquired by the demand illuminance acquisition unit, and a daylight illuminance calculated by the daylight illuminance calculation unit And a required illuminance calculation unit for calculating a required illuminance that is necessary for illuminating the position of the illumination target with the lamp, and the illuminance at the position and the degree of dimming of the lamp so as to be the illuminance. A lighting rate data storage unit that stores lighting rate data associated with a lighting rate for each lamp, and a plurality of the lighting rate data respectively corresponding to the required illuminance for each of the plurality of positions. When the plurality of lighting rate data of the same lamp is included in the plurality of lighting rate data, the illuminance at the plurality of positions is the demand illuminance. An illumination control unit that controls the artificial lighting dimming ratio calculation unit for calculating a re-adjustment rate for a predetermined range for each of the lamp, according to the lighting rate based on the previous SL lamp in the readjustment rate, Have

  Further, the present invention provides an illumination sensor that measures the total solar radiation amount in the vicinity of the living room, and the diffuse solar radiation amount and the direct solar radiation amount from the total solar radiation amount obtained from the illuminance sensor. An illuminance calculation unit that calculates sky light illuminance and direct light illuminance from the diffuse solar radiation amount and the direct solar radiation amount, and the illuminance information acquisition unit includes the sky light illuminance and the direct light illuminance calculated by the illuminance calculation unit. It is characterized by acquiring.

Further, the present invention includes a presence information acquisition unit that acquires presence information indicating whether or not a user is present at the position in the above-described lighting control system, and the lighting control unit includes the presence information acquisition unit. The lamp is controlled in accordance with the lighting rate data for a position in a seated state according to the seating information acquired by.
Further, the present invention provides the illumination control system described above, wherein the artificial lighting dimming rate calculating unit is based on the demand illuminance and the illuminance when the plurality of lamps calculated by the point-by-point method is turned on. The readjustment rate is calculated.
Further, the present invention provides the above-described illumination control system, wherein the required illuminance calculation unit is based on the maximum illuminance among the plurality of demand illuminances when there are a plurality of demand illuminances for the same position. It is characterized by calculating.

Further, the present invention is an illumination control method in an illumination control system for controlling a lamp provided in a living room into which daylight can be introduced, and obtains skylight illuminance and direct illuminance in the living room, and a solar position relative to the window And storing the skylight daylight rate and the direct sunlight daylight rate for each position of the illumination target in the living room in association with the sun position with respect to the window for introducing daylight into the living room, Read the skylight daylight rate and direct light daylight rate for each position of the illumination target in the living room corresponding to the acquired solar position, and read skylight daylight rate and direct light daylight rate , based on the acquisition was skylight illuminance and the direct light illumination intensity, the calculated daylight illumination of each position in the room to obtain a demand illuminance is an illuminance required at the position and the position of the illumination target, and the obtained demand Illuminance and the above calculation The necessary illuminance, which is the illuminance necessary for illuminating the position of the illumination target with the lamp, is calculated from the measured daylight illuminance, and indicates the illuminance at the position and the degree of dimming of the lamp so as to be the illuminance A lighting rate data storage unit that stores lighting rate data associated with each lighting rate is stored, and a plurality of the lighting rate data respectively corresponding to the required illuminance for each of the plurality of positions is stored in the lighting rate data storage. When the plurality of lighting rate data includes a plurality of lighting rate data of the same lamp, the illuminance at the plurality of positions is set to be within a predetermined range of the demand illuminance. calculating an adjustment factor for each of the lamp, and controlling according to the lighting rate based on the previous SL lamp in the readjustment rate.

As explained above, according to the present invention,
The illuminance obtained by daylight is calculated, and the lamp is turned on at a dimming rate according to the user's favorite illuminance in consideration of the illuminance of the daylight. Thereby, illumination with a lamp can be performed in consideration of daylight.

It is a figure which shows an example of the space of the object which an illumination control system performs illumination control. It is a schematic block diagram which shows the structure of the illumination control system 1 by one Embodiment of this invention. It is a figure explaining the relationship between a window surface and the position of the sun. It is a figure showing an example of the information showing the relationship between the solar azimuth angle with respect to the window surface in a living room, and a profile angle memorize | stored in the daylight rate database. It is a figure showing an example of the direct sunlight daylight rate data memorize | stored in the daylight rate database. It is a figure showing an example of the skylight daylight rate data memorize | stored in the daylight rate database. It is a figure showing the relationship between the sun azimuth angle with respect to the window surface in a living room, and a profile angle. It is a figure which shows the data example of the illumination distribution data memorize | stored in the illumination distribution data storage part 22. FIG. It is a figure which shows the data example of the lighting rate data memorize | stored in the lighting rate data storage part. It is a flowchart explaining operation | movement of the above-mentioned illumination control system 1. FIG.

Hereinafter, an illumination control system according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating an example of a space in which an illumination control system according to the present invention performs illumination control. Here, the living room 100 is surrounded by walls on four sides, and a window 110 is installed on the wall facing the southeast direction, and a daylight introduction device 120 such as a blind is provided in the window 110. Sunlight can be introduced into the living room 100 from the window 110 from sunrise to sunset, and illuminance can be obtained by daylight. The daylight introduction device 120 adjusts the amount of sunlight introduced through the window 110 and introduced into the living room 100 by adjusting the slat angle. The daylight introduction device 120 may be a gradation blind or a parallel blind.

  This living room 100 is, for example, an office room where a company works. In this living room 100, a plurality of desks and chairs are installed, and points where the desks are installed are point P1, point P2, point P3,..., P32. A plurality of lamps 30 are installed on the ceiling in the office room. Let the lamp 30 installed in the ceiling be L1, L2, L3, ..., L36. Here, for example, the points P1 to P14 and the points P19 to P32 are private seats, and the points P15 to P18 are shared seats.

FIG. 2 is a schematic block diagram showing the configuration of the illumination control system 1 according to one embodiment of the present invention. The illumination control system 1 is a computer system configured by, for example, a computer or a sensor.
The daylight illuminance sensor 10 is installed, for example, around a building where the living room 100 is located or on the roof, and measures the illuminance by detecting outdoor light in the vicinity of the living room 100. The daylight illuminance sensor 10 is, for example, a global solar radiation meter, and is installed horizontally to measure a global solar radiation measurement value [W / m ² ].
The building information storage unit 11 stores the latitude and longitude of the space for which illuminance control is performed and the orientation of the window surface.
Daylight factor database 12 stores a skylight daylight factor D _S is a daylight factor for daylight daylight direct light is the light index optical index D _D and skylight for direct light. The direct light daylight factor D _D and skylight daylight factor D _S is directed to an assumed room (room 100 in this case), obtained from the illuminance distribution results due to the light environment simulation by setting a predetermined input condition. Here, in the case of adjusting the sunlight which is introduced into room 100 with a daylight introduction device 120, the adjusted daylight direct light ratio D _D and skylight daylight factor D _S when the daytime By storing in the light rate database 12, the lighting control system 1 can control the lighting of the living room 100 used by the daylight introduction device 120.

Here, the daylight rate will be further described.
FIG. 3 is a diagram for explaining the relationship between the window surface 110a and the position of the sun S. FIG.
The solar altitude h _s is an angle with respect to a horizontal plane of a straight line L1 connecting a certain point A on the window surface 110a and the sun S.
The solar azimuth angle α with respect to the window surface is an angle formed by a straight line L2 obtained by projecting the straight line L1 on the horizontal plane and a horizontal line L3 orthogonal to the window surface 110a.
The incident angle i is an angle formed by a horizontal line L3 and a straight line L1 orthogonal to the window surface 110a.
The profile angle p is an angle formed by a projection line L4 obtained by projecting the straight line L1 onto a vertical plane orthogonal to the window surface 110a and a horizontal plane.

FIG. 4 is a diagram illustrating an example of information representing the relationship between the solar azimuth angle and the profile angle with respect to the window surface in the living room 100, which is stored in the daylight rate database 12.
In this figure, the vertical axis represents the profile angle, the horizontal axis represents the sun azimuth angle with respect to the window surface, and the relative position of the sun with respect to the window surface 110a is plotted.
The curve indicated by the symbol a represents the profile angle p for each time on June 17 of a certain year and the solar azimuth angle α with respect to the window surface. The curve shown by the symbol b represents the profile angle p for each time on December 12 of a certain year and the sun azimuth angle α with respect to the window surface. The curve indicated by reference symbol c is a curve obtained by connecting the points plotted for each day of the year with the profile angle p at a certain time (here, 7:00 am) and the solar azimuth angle α with respect to the window surface.

When the profile angle p is 0 ° to 90 °, the sun S is on the front side with respect to the window surface 110a, and direct light can be introduced into the living room 100 through the window 110. In the case of 90 °, the sun S is on the back side (the back side of the building) with respect to the window surface 110a, and direct light cannot be introduced into the living room 100 through the window 110.
Based on the relationship shown in this figure, the solar position relative to the window surface 110a of the living room 100 can be grasped. For example, it obtains the solar position in time to perform the lighting control from the relationship shown in this figure, obtains the daylight factor in the solar position (direct light daylight factor D _D and skylight daylight factor D _S).
For example, at 10 am on June 17 of a certain year, the profile angle p is about 65 °, and the solar azimuth angle α with respect to the window surface is about −25 °. Further, for example, at 10 am on December 12, the profile angle p is about 28 °, and the sun azimuth angle with respect to the window surface is about 17 °.

FIG. 5 is a diagram illustrating an example of direct sunlight daylight rate data stored in the daylight rate database 12. Daylight direct light ratio data with respect to the combination of the solar azimuth angle α to the profile angle p and the window surface is data direct light daylight factor D _D is associated at each seat. For example, the profile angle p is is 50 °, if the solar azimuth angle α with respect to the window surface is 30 °, the direct light daylight factor D _D in the seat P1 is 1.361%, the direct light daylight in the seat P2 rate _{D D} represents a be 0.466%.
Here, the direct-light daylight rate data is obtained when the profile angle p is 10 °, and the direct-light daylight at each seat corresponding to the sun azimuth angle α of −15 ° and 0 ° with respect to the window surface. rate _{D D} is associated. For example, when the profile angle p is 40 °, the solar azimuth angle α is -15 ° with respect to the window surface, direct light daylight factor D _D at each seat corresponding to each 0 ° is associated with . -45 °, -30 °, 0 ° , 30 °, direct light daylight factor _{D D} at each seat corresponding to each 45 ° is associated. That is, the solar azimuth angle α direct light daylight factor D _D corresponding to a combination of the relative profiles angles p and window surface represented by the position indicated by the black circle is associated in FIG.
Here, since the direct light has directivity, the direct light daylight rate is stored in the database according to the profile angle and the sun direction with respect to the window surface.

FIG. 6 is a diagram illustrating an example of skylight daylight rate data stored in the daylight rate database 12.
Here, daylight sky light ratio data with respect to the profile angle p, and skylight daylight factor D _S is associated at each seat. For example, the profile when the angle p is 10 °, skylight daylight factor _{D S} in the seat P1 is 0.256%, indicates that skylight daylight factor _{D S} in the seat P2 is 0.110% ing.
Further, where the skylight daylight factor data, profile angle p is 10 ° to 80 skylight daylight factor D _S at each seat corresponding to respective angles of 10 ° increments until ° is associated with ing.

Returning to Figure 2, the illuminance calculation unit 13 based on the illuminance measured daylight illumination sensor 10, in accordance with straight Diffuse expression shown in the following equation (1) to (6), diffuse solar radiation I _S and direct solar radiation Based on the function for calculating the amount I _D , the amount of solar radiation obtained and the solar altitude h _S , the sky light illuminance E _S and the direct light illuminance E are obtained according to the following equations (7) to (8). _D has a function of calculating _D.

Here, I _D is direct solar radiation amount, I _S is diffused solar radiation, I is the total solar radiation measured value [W / m ^2], the amount of solar radiation I ₀ is in outer space, d the total number of days from the New Year's Day (e.g. January 1 is 1 and December 31 is 365), h _s is the solar altitude [°], K _Tt is the ratio of the amount of solar radiation on the ground surface and the amount of solar radiation outside the atmosphere, and K _TtC is the formula (3) And the connection point of the equation (4). The value obtained by the daylight illuminance sensor 10 is used as the total solar radiation measurement value [W / m ² ]. The total number of days d is calculated based on the date and time obtained by the date and time acquisition unit 14.

Here, the illuminance calculation unit 13 calculates K _Tt and K _TtC from Expression (1) and Expression (2), and calculates I ₀ from Expression (5). When the illuminance calculation unit _13, when the the _{K Tt} and _{K TtC} the same or _{K Tt> K TtC} calculates the _{I D} according to equation _(3), a K Tt _{<K TtC} Calculates _ID based on equation (4). In addition, when calculating | requiring a diffuse solar radiation amount, the illumination intensity calculation part 13 calculates | requires based on Formula (6).

Illuminance calculation unit 13 uses the value obtained by the above equation (1) to (6), by the following equation (7) to (8), calculates the direct illuminance E _D and skylight illuminance E _S To do.

The date acquisition unit 14 has a clocking function inside, and obtains the current date according to the clocking result.
Based on the current date and time obtained by the date and time acquisition unit 14 and the information stored in the building information storage unit 11, the solar position calculation unit 15 determines the solar position (solar altitude h _S , solar azimuth α relative to the window surface). , The incident angle i) is calculated. This solar position can be calculated by using existing technology.
The daylight rate calculation unit 16 determines the daylight rate (direct sunlight daylight rate _DD and skylight daylight rate D) in each seat arranged in the living room 100 according to the sun position calculated by the sun position calculation unit 15. _S ) is calculated.
More specifically, the daylight rate calculation unit 16 calculates the daylight rate (direct sunlight daylight rate D _D and skylight daylight rate D _S ) corresponding to the sun position calculated by the sun position calculation unit 15 as daylight. Read from the light rate database 12. If the direct light daylight factor D _D matching to be controlled date is stored in the daylight factor database 12, day daylight factor from the optical index database 12 (daylight direct light ratio D _D and skylight It is obtained by reading out the daylight rate D _S ).
Daylight factor calculating unit 16, if the direct light daylight factor D _D matching to be controlled date is not stored in the daylight factor database 12, based on the data stored in the daylight factor database 12 In addition, the daylight rate is obtained by calculating the daylight rate according to the daylight rate interpolation equations represented by the following formulas (9) to (11).

The following describes a case of calculating by interpolation daylight direct light ratio D _D.
FIG. 7 is a diagram showing the relationship between the solar azimuth angle and the profile angle with respect to the window surface in the living room 100, and is an enlarged view of a part of FIG. For example, the daylight factor database 12, if the direct light daylight factor D _D matching to be controlled date is not stored, the daylight factor calculating section 16, the profile angle p, solar azimuth angle with respect to the window surface Four combinations of the profile angle closest to α and the sun azimuth angle with respect to the window surface are extracted, and interpolation is performed according to a linear linear interpolation formula based on the direct sunlight daylight rate values at the four extracted points. The direct sunlight daylight rate _DD is calculated.
For example, the daylight rate calculation unit 16 selects, as the selected four points, the direct light daylight rate D _{−, +} when the profile angle is p ₊ and the solar azimuth angle a ₋ with respect to the window surface _, and the profile angle is Direct sunlight daylight rate D _{+, +} when the solar orientation angle a ₊ is p ₊ and the solar orientation angle a ₊ with respect to the window surface, and direct sunlight daylight when the profile angle is p ₋ and the solar orientation angle a ₋ with respect to the window surface The ratios D _{− and −} and the direct sunlight daylight rate D _{+ and −} when the profile angle is p ₋ and the solar azimuth angle a ₊ with respect to the window surface are read out. Then, the direct-light daylight rate _{DD, +} when the profile angle is p ₊ and the solar azimuth angle α with respect to the window surface is calculated by Equation (9), and the profile angle is p ₋ by Equation (10). And the direct sunlight daylight rate _{DD, −} when the solar azimuth angle α with respect to the window surface is calculated. Then, based on the direct light daylight rate _{DD, +} and the direct light daylight rate _{DD, −} obtained by the formulas (9) and (10), the profile angle is p according to the formula (11). The direct sunlight daylight ratios DD and _D when the solar azimuth angle α with respect to the window surface is calculated.

Further, the daylight factor calculation unit 16, when the skylight daylight factor D _S that matches a control target date is not stored in the daylight factor database 12 is calculated by interpolation as described above. However, only the profile angle is interpolated.

  The daylight illuminance calculation unit 17 calculates the daylight illuminance at each seat. More specifically, the daylight illuminance calculation unit 17 calculates the daylight illuminance of each seat when not illuminated by artificial lighting, according to the following formula (12), which is a calculation formula for calculating the daylight illuminance of each seat. . Here, x represents the seat ID of each seat. τ is the transmittance of the window glass. i is an incident angle.

Demand illuminance acquiring unit 18, a demand illuminance E ₀ representing the illuminance user requests to use the seat, obtaining for each seat. This acquisition may be specified by, for example, pressing a button for specifying a desired illuminance provided in each seat, or input using an input device such as a computer keyboard or mouse provided in each seat. You may acquire the data you have. For example, the demand illuminance acquisition unit 18 acquires data specifying illuminance such as “470 lux” and “398 lux”.

Required illuminance calculation unit 19, and a demand illuminance E ₀ at a seat obtained by demand illuminance acquiring unit 18, and the seat daylight illuminance E _N calculated by daylight illumination calculation unit 17 a daylight illumination corresponding , and calculates the required illuminance E _a is the intensity of the required artificial lighting in the seat. Required illuminance calculating section 19, required illuminance _{E A} = demand illuminance _{E 0} - determined by daylight illuminance _{E N} becomes equation. Also, this requires the illuminance calculation unit 19 calculates for each of the seats the needed illumination E _A.

  The presence information acquisition unit 20 acquires information indicating whether the user is present (present) or away (absent) in the seat. For this acquisition, various means can be used as long as the user can be present or absent. For example, the user may press a switch provided on the seat to indicate whether he is present or away, or an ID stored in an RFID (Radio Frequency IDentification) card carried by the user may be You may make it obtain according to whether it can read with the card reader provided in the position or its vicinity.

The illuminance distribution data storage unit 22 is configured such that, for each of a plurality of points (P1 to P32) defined in a space illuminated by a plurality of lamps, the illuminance at that point when the lamp is lit is a plurality of lamps (L1 to L1). The illuminance distribution data associated with each L36) is stored in advance.
FIG. 8 is a diagram illustrating a data example of illuminance distribution data stored in the illuminance distribution data storage unit 22. Here, the dimming is associated with a column indicating lamp ID that is lamp identification information for identifying a lamp and a row indicating point ID that is point identification information for identifying a predetermined point in the office space. The illuminance at each point when a possible lamp is lit at the maximum (100%) lighting rate is stored. The unit of illuminance is lx (lux). For example, when the lamp 30 whose lamp ID is L23 is turned on, the illuminance at the point P21 is 100 lux, and the illuminance at the point P22 is 410 lux. Such illuminance may be a value measured in advance or a value calculated by simulation. Here, when there is a movable partition in the office room, for example, the illuminance distribution data storage unit 22 stores in advance the illuminance distribution data for both when the partition is open and when the partition is closed. In addition, reading may be performed according to the situation.

The lighting rate data storage unit 23 illuminates each point (P1 to P32) to illuminate the point with a predetermined illuminance and identifies the lamp identification information (lamp ID) for lighting and the dimming of the lamp The lighting rate data in which the lighting rate indicating the degree of lighting is associated is stored.
FIG. 9 is a diagram illustrating a data example of lighting rate data stored in the lighting rate data storage unit 23. In this figure, the lighting rate data at the point P21 and the point P22 are shown. For example, in order to illuminate the point P21 with an illuminance of 300 lux, it is shown that the lamp L29 is lit at a lighting rate of 70%. Similarly, in order to illuminate the point P21 with an illuminance of 700 lux, the lamp L29 is turned on at a lighting rate of 100%, the lamp L30 is turned on at a lighting rate of 100%, and the lamp L23 is turned on at a lighting rate of 10%. ing. Although only the lighting rate data for individual seats is shown here, similar lighting rate data can be prepared and stored in advance for shared seats.

Artificial lighting dimming ratio calculation unit 24 receives the information representative of the resident or absence obtained by presence information acquisition unit 20, and the required illuminance E _A calculated by the required illuminance calculation unit 19, based on each luminaire The light control rate is calculated.

For example, the artificial lighting dimming rate calculation unit 24 acquires the position ID corresponding to the seat ID that is the target of illumination and the user is present. For example, the artificial illumination dimming rate calculation unit 24 stores the seat ID and the position ID in association with each other, and obtains the position ID by referring to this information. Artificial lighting dimming ratio calculation unit 24, the resulting corresponding to the location ID reads lighting rate data from the lighting rate data storage unit 23, read according to the lighting rate data, the lamp to be turned on in accordance with the required illuminance E _A It is calculated by reading the lamp ID and the lighting rate.

The illumination control unit 25 lights each lamp 30 installed in the living room 100 according to the lamp ID of each lamp calculated by the artificial lighting dimming rate calculation unit 24 and the lighting rate thereof.
A plurality of lamps 30 are installed in the living room 100, and a lamp ID is assigned to each. The lamp for control purposes can be specified by this lamp ID and can be turned on according to the dimming rate.

Next, operation | movement of the illumination control system 1 mentioned above is demonstrated. Here, the daylight introduction device 120 is wound up, and a case where all sunlight transmitted through the window 110 is introduced into the living room 100 will be described.
FIG. 10 is a flowchart for explaining the operation of the illumination control system 1 described above.
The date and time acquisition unit 14 of the illumination control system 1 acquires the date and time when the illumination control is performed (step S10). The sun position calculation unit 15 includes the solar altitude h _S , the solar azimuth angle α with respect to the window surface, and the incident angle i from the date and time acquired by the date and time acquisition unit 14 and the building information stored in the building information storage unit 11. The position is calculated (step S11).

When the sun position is calculated, the daylight rate calculation unit 16 calculates the direct sunlight daylight rate _DD and the skylight in each seat arranged in the living room 100 based on the sun position calculated by the sun position calculation unit 15. obtained by reading the Hiruhikariritsu D _S from daylight factor database 12. Here, if the daylight rate D _D and the skylight daylight rate D _S coincident with the date and time to be controlled are not stored in the daylight rate database 12, the daylight rate calculation unit 16 determines the daylight rate. It is obtained by calculating according to the daylight rate interpolation formula based on the data stored in the light rate database 12 (step S12).

On the other hand, the daylight illuminance sensor 10 measures the total solar radiation amount on the horizontal plane (step S14). The illuminance calculation unit 13 uses the direct light separation formula from the total solar radiation amount obtained by the daylight illuminance sensor 10 and the solar altitude h _S corresponding to the date and time obtained by the date and time acquisition unit 14, and uses the skylight illuminance E calculating the direct illuminance _{E D} and _S (step S16), and from this the skylight illuminance _{E S} and direct light illuminance _{E D,} to calculate the direct illuminance _{E D} and skylight illuminance _{E S} (step S17, S18).

Direct light daylight factor D _D and skylight daylight factor D _S, the a skylight illuminance E _S and direct light illuminance E _D is calculated, daylight intensity calculation unit 17, calculation formula for calculating the daylight illumination (step S19) accordingly calculates the daylight illuminance _{E N} of the seat (step S20).

On the other hand, when demand illuminance E ₀ at each seat is inputted from the demand illuminance acquiring unit 18 (step S21), and necessary illumination calculation unit 19, demand illuminance E ₀ daylight illuminance E _N of the seat calculated in step S20 by subtracting from, it calculates the required illuminance E _a by artificial lighting of the seat (step S22). Here, each seat is calculated.
When the presence information acquisition unit 20 acquires whether the user is present or away (step S23), the artificial lighting dimming rate calculating unit 24 adjusts the dimming rate for each of the lamps corresponding to the seated seat. Is calculated (step S24). When the dimming rate of the artificial illumination is calculated, the lighting control unit 25 turns on the lighting target lamp according to the calculated dimming rate (step S25).

The lighting control system 1 performs the above-described processing at predetermined time intervals, at the timing when the user is present or away, and at the timing when the input value of the demand illuminance E ₀ is changed, thereby allowing the lighting control system 1 Each lamp can be controlled at a dimming rate according to the situation.

  In the above-described embodiment, the artificial lighting dimming rate calculating unit 24 detects that one user is seated in the seat, and when it is determined that the user is seated, the position where the user is seated. However, when a plurality of users are in a seated state, the lighting rate at which one or more lamps are turned on according to the seat in the seated state is described. calculate.

In this case, when the artificial lighting dimming rate calculation unit 24 acquires that a plurality of users are seated by the presence information acquisition unit 20 by a plurality of users sitting in their respective seats, in a seat respectively acquires the demand illuminance E ₀ for each user corresponding seat showing each of the plurality of lighting request by a plurality of demand illuminance E ₀ obtained (point corresponding to the seat of the point P1～P32) When a plurality of lighting rate data for illuminating the light is read from the lighting rate data storage unit 23 and the same lamp ID is included in the plurality of read lighting rate data, each of a plurality of points included in the plurality of lighting requests Is calculated based on the illuminance distribution data stored in the illuminance distribution data storage unit 22.

Specifically, for example, the presence information acquisition unit 20 performs a first lighting request in which the user ID is 1 and the spot ID is P21, and a second lighting in which the user ID is 2 and the spot ID is P22. Suppose we get the request. In this case, the artificial illumination dimming rate calculating unit 24 acquires the required illuminance corresponding to the user ID “1” and the required illuminance corresponding to the user ID “2” by the demand illuminance acquiring unit 18.
Here, when the required illuminance of any individual seat is 700 (lux), the artificial lighting dimming rate calculation unit 24 illuminates the point P21 from the lighting rate data storage unit 23 with the illuminance 700 (lux). The lamp ID and the lighting rate T1 are read out. Similarly, a lamp ID and a lighting rate T2 for illuminating the point P22 with an illuminance of 700 (lux) are read out.

As shown in FIG. 9, in order to illuminate the point P21 with an illuminance of 700 (lux), the lamp L29 is turned on at a lighting rate T1 of 100%, the lamp L30 is 100%, and the lamp L23 is 10%. On the other hand, in order to illuminate the point P22 with an illuminance of 700 (lux), the lamp L23 is turned on at a lighting rate T2 of 100%, the lamp L24 is 100%, and the lamp L29 is 10%. That is, in order to set the illuminance at both points to at least 700 (lux) or more, all of the lamp L23, the lamp L24, the lamp L29, and the lamp L30 are turned on at a lighting rate of 100%.
When the lamp 30 is turned on in this way, the illuminance I1 at the point P21 and the illuminance I2 at the point P22 are the sum of the values shown in FIG. Here, by the point-by-point method, the direct light illuminance when a plurality of lamps are turned on is obtained by adding the individual illuminance of each lamp. Similarly, indirect light can be added. That is, the illuminance I1 at the point P21 is 100 + 80 + 420 + 270 = 870 (lux). The illuminance I2 at the point P22 is 410 + 260 + 150 + 110 = 930 (lux).

Based on the illuminance calculated in this way, the artificial illumination dimming rate calculation unit 24 calculates the value of (required illuminance ÷ calculated illuminance) as the readjustment rate R. For example, the readjustment rate R1 at the point P21 is (700 ÷ 870) = 0.8. The readjustment rate R2 at the point P22 is (700 ÷ 930) = 0.75.
Therefore, the artificial illumination dimming rate calculating unit 24 obtains a value obtained by multiplying the illuminance I1 and the illuminance I2 by the readjustment rate R1 and the readjustment rate R2. However, at the point P21, the lamp L29 and the lamp L30 are multiplied by the readjustment rate R1, and at the point P22, the lamp L23 and the lamp L24 are multiplied by the readjustment rate R2. The illuminance I1 ′ when the lamp 30 is turned on at the lighting rate based on the readjustment rate is 100 × 0.75 + 80 × 0.75 + 420 × 0.8 + 270 × 0.8 = 687 (lux) at the point P21. is there. Similarly, the illuminance I2 ′ at the point P22 is 410 × 0.75 + 260 × 0.75 + 150 × 0.8 + 110 × 0.8 = 710 (lux). Thereby, the illuminance at both points is close to the user's required illuminance 700 (lux).

The lighting control unit 25 transmits a lighting command to the lamp 30 based on the seat ID of the seat in the seated state by the seating information acquisition unit 20. In addition, when the lighting control unit 25 acquires the presence information in the plurality of seats in the presence information acquisition unit 20, when the same lamp ID is included in the acquired seat, The lamp 30 is turned on at a lighting rate based on the readjustment rate R calculated by the artificial lighting dimming rate calculation unit 24.
Specifically, the lighting control unit 25 calculates a lighting rate based on the readjustment rate R calculated by the artificial lighting dimming rate calculating unit 24 for each lamp 30, and the lighting of lighting with the calculated lighting rate is performed. A command is transmitted to the control part which lamp 30 has. The lamp 30 lights the lamp 30 at a specified lighting rate in accordance with the lighting command transmitted from the illumination control unit 25.

  In addition, when the information indicating the presence state acquired by the presence information acquisition unit 20 is a lighting request for the same spot (for example, a shared desk or the like), the lighting control unit 25 sets the seating state to the seat in the presence state. A lighting command for lighting the lamp with the maximum illuminance among the plurality of required illuminances corresponding to the corresponding user is transmitted to the lamp 30. That is, when a plurality of users are seated at the same point, a lighting command is transmitted in accordance with a user who prefers brighter illumination among the plurality of users.

  Thereby, even if it is a case where it illuminates with the common lamp 30 with respect to a some user, illumination control can be performed by calculating a readjustment rate and controlling the lamp 30. FIG. In addition, even when a plurality of users share and use one desk, it is possible to illuminate with illuminance that matches the preference of the brightest user among the users who are present.

Further, according to the above-described embodiment, daylight is taken into the living room 100, the daylight rate at each time in each seat is calculated, and the diffuse solar radiation amount and the direct solar radiation amount are calculated from the measured horizontal solar radiation amount. The sky light illuminance and the direct light illuminance are calculated from the diffuse solar radiation amount and the direct solar radiation amount, and the daylight illuminance of each seat is calculated using these values. Thereby, the illuminance insufficient for the demand illuminance of each seat can be obtained by calculating the difference between the demand illuminance and the daylight illuminance, and the dimming rate of the lamp is determined according to the insufficient illuminance, and each lamp is I tried to control it. Moreover, since the daylight rate at the time of performing illumination control is calculated, even if the illuminance due to daylight changes due to a change in the sun position, the lamp can be turned on at a dimming rate according to the change.
In addition, since the illuminance of daylight is calculated based on the amount of solar radiation obtained from the daylight illuminance sensor 10, even if the illuminance of daylight changes due to changes in weather, the dimming rate according to the change You can turn on the lamp.

Further, in the conventional daylight control, a plurality of illuminance sensors are required in the room. However, since an illuminance sensor other than the illuminance sensor (for example, the daylight illuminance sensor 10) for detecting outdoor light is not required, It is not necessary to secure a place for installing an illuminance sensor for measuring illuminance, and the cost can be reduced.
Further, according to the above-described embodiment, since the daylight shortage is compensated by artificial lighting, the illuminance required by the user is satisfied as compared with the case where all necessary illuminance is obtained by artificial lighting in the living room 100. Meanwhile, the illumination energy can be reduced.

Moreover, in the said embodiment, although the case where the daylight introduction apparatus 120 of the living room 100 was wound up was demonstrated, illumination control can be performed even if it is a case where it is lowered. In that case, by storing the daylight rate when the blind is installed in the daylight rate database 12, it is possible to perform illumination control according to the daylight introduced through the blind.
In addition, when daylight introducing device that is highly tailored to momentarily change of the sun (gradient blind) is attached to the window surface of the room 100, for the skylight daylight factor D _S, by solar altitude By creating a database and storing it in the daylight rate database 12, the illumination control system 1 can perform illumination control in consideration of daylight introduced through the gradation blind.

Further, in the above-described embodiment, the case where the daylight rate database 12 is created and stored has been described. However, instead of storing the daylight rate database 12 in advance, the movement of the sun with respect to the assumed window surface of the living room is simulated. collected by the required solar altitude performs light environment simulation only solar orientation, resulting solar azimuth angle relative to the sun altitude and the window surface at the date and time of the controlled object, the direct light daylight factor D _D, a skylight daylight factor D _S This may be used by the daylight rate calculation unit 16. As a result, the labor required for database creation can be reduced.

In the embodiment described above, direct solar radiation amount I _D, the diffusion amount of solar radiation I _S calculated using the immediately separative from global solar radiation of horizontal plane obtained by daylight illumination sensor 10, and, skylight illuminance E was to calculate the direct illuminance E _D and _S, it may be used other calculation formula, provided the illuminance sensor to obtain a direct illuminance E _D illuminance sensor to obtain a skylight illuminance E _S, these illumination it may be obtained a direct illuminance E _D and skylight illuminance E _S from the sensor.

Further, in the embodiment above, daylight factor calculation unit 16, has been to calculate the daylight factor (direct light daylight factor D _D and skylight daylight factor D _S) of the seat, the control target The daylight ratio of each seat at each time may be calculated and stored in advance, and the daylight illuminance calculation unit 17 may read the daylight ratio to calculate the daylight illuminance of each seat.

In the above-described embodiment, since the sensor logic is provided, if there is a sensor that detects outdoor light, it is not necessary to provide an indoor sensor.
In the above-described embodiment, the sun is hidden behind the clouds on a cloudy day. However, since the amount of direct solar radiation is not completely absent, the direct solar radiation amount shows a value close to 0, and the illuminance considering that it is cloudy can be obtained by the direct scattering separation formula. Therefore, by using this direct solar radiation amount, it is possible to perform illumination control in consideration of daylight even on a cloudy day.

  Moreover, the program for realizing the function of the illumination control system in FIG. 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into the computer system and executed to execute the illumination control. You may go. Here, the “computer system” includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Illumination control system 10 Daylight illumination sensor 11 Building information storage part 12 Daylight rate database 13 Illuminance calculation part 14 Date and time acquisition part 15 Solar position calculation part 16 Daylight rate calculation part 17 Daylight illumination intensity calculation part 18 Demand illumination intensity acquisition part 19 Necessary illumination intensity Calculation unit 20 Presence information acquisition unit 22 Illuminance distribution data storage unit 23 Lighting rate data storage unit 24 Artificial illumination dimming rate calculation unit 25 Lighting control unit 30 Lamp

Claims (6)

A lighting control system for controlling a lamp provided in a room where daylight can be introduced,
Illuminance information acquisition unit for acquiring skylight illuminance and direct light illuminance in the living room,
A storage unit that stores a skylight daylight rate and a direct light daylight rate for each position of the illumination target in the living room in association with a sun position with respect to a window that introduces daylight into the living room;
A solar position acquisition unit for acquiring a solar position relative to the window;
The skylight daylight rate and the direct sunlight daylight rate for each position of the illumination target in the living room corresponding to the solar position acquired by the solar position acquisition unit are read from the storage unit, and the read skylight daytime is read out. A daylight illuminance calculating unit that calculates daylight illuminance for each position in the living room, based on the light rate and the direct sunlight daylight rate, and the skylight illuminance and direct light illuminance acquired by the illuminance information acquisition unit;
A demand illuminance acquisition unit that acquires a position of an illumination target and a demand illuminance that is necessary illuminance at the position;
A required illuminance calculation unit that calculates a necessary illuminance necessary for illuminating the position of the illumination target with a lamp from the demand illuminance acquired by the demand illuminance acquisition unit and the daylight illuminance calculated by the daylight illuminance calculation unit When,
A lighting rate data storage unit that stores lighting rate data in which the lighting rate for each lamp indicating the illuminance at the position and the lighting intensity of the lamp is associated with the illuminance;
A plurality of the lighting rate data respectively corresponding to the required illuminance for each of the plurality of positions is acquired from the lighting rate data storage unit, and the plurality of lighting rate data of the same lamp is included in the plurality of lighting rate data If there is an artificial illumination dimming rate calculating unit for calculating the readjustment rate for each lamp, the illuminance at the plurality of positions is within a predetermined range of the demand illuminance,
An illumination control section for controlling according to the lighting rate based on the previous SL lamp in the readjustment rate,
A lighting control system comprising: An illuminance sensor for measuring the amount of solar radiation in the vicinity of the living room;
An illuminance calculation unit is provided that calculates a diffuse solar radiation amount and a direct solar radiation amount from the total solar radiation amount obtained from the illuminance sensor, and calculates a sky light illuminance and a direct light illuminance from the diffuse solar radiation amount and the direct solar radiation amount. And
The illumination control system according to claim 1, wherein the illuminance information acquisition unit acquires skylight illuminance and direct light illuminance calculated by the illuminance calculation unit. A presence information acquisition unit that acquires presence information indicating whether or not a user is present at the position;
The lighting control unit controls the lamp according to the lighting rate data for a position in a seated state according to the seating information acquired by the seating information acquisition unit. 2. The lighting control system according to 2. The artificial illumination dimming rate calculating unit calculates the readjustment rate based on the demand illuminance and the illuminance when the plurality of lamps calculated by the point method is turned on.
The illumination control system according to any one of claims 1 to 3, wherein The required illuminance calculation unit calculates a plurality of demand illuminances for the same position based on the maximum illuminance among the plurality of demand illuminances.
The lighting control system according to any one of claims 1 to 4, wherein A lighting control method in a lighting control system for controlling a lamp provided in a room where daylight can be introduced,
Obtain the skylight illuminance and direct light illuminance in the room,
The sun for the window for introducing daylight into the living room is acquired, and the sun for the window for introducing daylight into the living room for the skylight daylight rate and the direct sunlight daylight rate for each position of the illumination target in the room. A skylight daylight rate and a direct light daylight rate for each position of the illumination target in the living room corresponding to the acquired solar position are read from the storage unit that is stored in association with the position, and the read sky based on the optical daylight factor and direct light daylight factor, the acquisition was skylight illuminance and direct light illumination intensity, calculates the daylight illumination of each location in the room,
Obtain the illumination target position and the demand illuminance, which is the illuminance required at that position,
From the acquired demand illuminance and the calculated daylight illuminance, calculate the required illuminance that is the illuminance required when illuminating the position of the illumination target with a lamp,
Refer to the lighting rate data storage unit that stores lighting rate data in which the lighting rate for each lamp indicating the illuminance at the position and the lighting intensity of the lamp is associated with the illuminance.
A plurality of the lighting rate data respectively corresponding to the required illuminance for each of the plurality of positions is acquired from the lighting rate data storage unit, and the plurality of lighting rate data of the same lamp is included in the plurality of lighting rate data If it is, calculate the readjustment rate for each lamp to adjust the illuminance at the plurality of positions within a predetermined range of the demand illuminance,
Lighting control method and controlling according to the lighting rate based on the previous SL lamp in the readjustment rate.

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