JPH10205254A - Electronic blind system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic blind system which is low in cost and in which the maintenance work can be easily carried out and the load of the center equipment and the traffic of communication circuits can be reduced. SOLUTION: The sunrise time and the sunset time are calculated every day from the longitude and latitude information preset in a containing part 13 of information of the building location by means of a timer 12, in the operation part 10 of a center device 1 and stored in a containing part 16 for the sunrise and sunset times respectively. The operating part 10 judges whether the present time is within the range from the sunrise time to the sunset time stored in the containing part 16 for the sunrise and sunset times at every sun-cut control period preset in a container 14 for control period. When it is within the range, the operation part 10 operates an ideal slat angle following up the sun position and controls sun-cutting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blind system, and more particularly to a system for controlling a plurality of blinds installed in a building remotely or at hand to control a slat angle.

[0002]

2. Description of the Related Art Conventionally, in this type of electronic blind system, a blind controller mounted on the top of each blind and a center device installed in a remote place (such as a building management center) are provided in the building. They are connected by a communication line via a repeater, and the state of each blind is collectively monitored and controlled by the center device and the repeater.

[0003] In addition, the blind controller can directly control the blind without operating through a center device and a repeater by operating a switch panel which is a hand switch.

In the above electronic blind system, the center device has a sun cut control function for periodically calculating the ideal slat angle of each blind in the building and automatically controlling the angle. Here, the slat is a thin slat for the sunshade provided on the blind, and the ideal slat angle is an angle that keeps the slat as horizontal as possible and blocks the direct rays, that is, blocks the direct rays from the sun. And it is an ideal angle for introducing outside light into a room.

[0005] In the above electronic blind system, the lifting and lowering of each blind and the adjustment of the slat angle are collectively controlled via a center device and a repeater. There are some.

For example, in the technique disclosed in Japanese Patent Application Laid-Open No. 8-64017, a photodiode for detecting direct light near a window in which individual blinds are installed, and an anti-reflection made of a material having a low reflectance A detecting unit composed of a plate is arranged, and the detecting unit determines the insolation from sunrise to sunset, and controls the vertical movement of the blind and the adjustment of the angle of the blade.

[0007]

In the above-mentioned conventional electronic blind system, since the center device calculates the sun position all day and calculates the ideal slat angle of the blind so as to follow it, unnecessary calculation and communication are unnecessary. Will be performed.

Further, in the case of providing a mechanism for controlling the vertical movement and the adjustment of the slat angle in each blind, it is necessary to provide a photodiode or an anti-reflection plate for each window or each blind. Difficulty in maintenance after system introduction. For example, if the light receiving portion of the photodiode is contaminated with dust or the like, obstacles such as inability to raise and lower the blind and adjust the slat angle may be considered.

Therefore, an object of the present invention is to solve the above-mentioned problems, to achieve low cost and easy maintenance, to reduce the load on the center device and reduce the traffic on the communication line. To provide a blind system.

[0010]

SUMMARY OF THE INVENTION An electronic blind system according to the present invention is an electronic blind system in which the elevation of a plurality of electronic blinds installed in a plurality of buildings and the angle of a blade plate are collectively controlled by a center device. ,
Calculation means for calculating sunrise time and sunset time in advance, and calculation means for calculating the ideal slat angle of the slats for blocking the sun position and direct light from the sun and introducing outside light into the room The center device further includes control means for controlling the calculation means to operate only during the period from the sunrise time to the sunset time based on the calculation result of the calculation means.

In other words, in the electronic blind system of the present invention, the center device calculates the sunrise time and the sunset time of the day in advance, and determines the position of the sun only from the sunrise time to the sunset time of the day (sunshine time zone). The calculation and the calculation of the ideal slat angle are performed, and the calculation is suspended from the sunset time of the day to the sunrise time of the next day.

Thus, the load on the center device can be reduced, and the traffic on the communication line can be reduced. Further, since there is no need to provide a photodiode or an anti-reflection plate near each blind or window, the system can be realized at low cost, and maintenance of the photodiode, the anti-reflection plate, etc. is not required.

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing functions of one embodiment of the present invention. In the figure, a center device 1
Is an arithmetic unit 10 and a clock unit 12 for measuring date and time.
And a building position information storage unit 13 for storing building position information (latitude / longitude), a control cycle storage unit 14, a blind information storage unit 15, a sunrise / sunset time storage unit 16, and a data transmission unit 17. And The calculation unit 10 is provided with a calculation formula storage unit 11 for storing calculation formulas for calculating the sun position and the ideal slat angle.

The center device 1 is connected to each of the repeaters 2-i (i = 1, 2,...) Via a communication line 100, and each of the repeaters 2-i has a blind (not shown). B) blind control units 3-j (j = 1,...)
Is connected.

The blind control section 3-j controls a blind motor 5-j for raising and lowering each blind and opening and closing the slats. Further, a switch panel 4-j, which is a hand switch, is provided in the blind control unit 3-j. By operating the switch panel 4-j, the switch panel 4-j does not pass through the center apparatus 1 and the relay 2-i. It is also possible to control the blinds directly.

FIG. 2 is a flowchart showing the operation of one embodiment of the present invention. With reference to FIGS. 1 and 2, a description will be given of blind suncut control (control for blocking direct light from the sun) according to an embodiment of the present invention.

When the system is introduced, the location (latitude / longitude) of the building in which the system is to be introduced is set in the center device 1, and the location of the building is stored in the building position information storage unit 13 of the center device 1 (step in FIG. 2). S1).

Further, a control cycle (for example, about 1 minute to 30 minutes) for performing suncut control on the blind is set in the center apparatus 1.
(Step S in FIG. 2)
2). Thereafter, the system installed in the building is operated.

When the system is operated, the arithmetic unit 10 of the center device 1 uses the clock unit 12 to store the sunrise time and the sunset time of the day at 00:00 every day using the building position information storage unit 1.
3 and is stored in the sunrise / sunset time storage section 16 of the center apparatus 1 (steps S3 and S4 in FIG. 2).

The arithmetic unit 10 of the center device 1 sets the current time from the sunrise time to the sunset time stored in the sunrise / sunset time storage unit 16 for each suncut control cycle set in the control cycle storage unit 14. Is determined (step S5 in FIG. 2), and if it is within the range, the ideal slat angle calculation and suncut control following the sun position are performed (steps S6 and S7 in FIG. 2). . On the other hand, if the calculation unit 10 of the center device 1 is out of the range (during sunset), nothing is performed until the next control cycle.

The arithmetic unit 10 of the center device 1 has the latitude / longitude information set in the building position information storage unit 13 and the clock unit 12.
Based on the current time from, the calculation of the sun position and the calculation of the ideal slat angle are performed.

The arithmetic unit 10 of the center device 1 converts the ideal slat angle data obtained by the calculation of the ideal slat angle into each of the repeaters 2-i.
Send to Upon receiving the ideal slat angle data, each repeater 2-i transmits the ideal slat angle data to each of the subordinate blind control units 3-j.

When each blind control unit 3-j receives the ideal slat angle data, the blind control unit 3-j analyzes the received message and controls the blind motor 5-j to adjust the slat of each blind.

As described above, in one embodiment of the present invention, the suncut control is performed only during the daylight hours without placing a conventional photodiode or anti-reflection plate for each blind, and the blind is slatted all year round. It is possible to keep the corner.

In the above description, the arithmetic unit 10 of the center device 1 calculates the sunrise time and the sunset time of the day in advance,
Although the calculation of the sun position and the calculation of the ideal slat angle are performed only from the sunrise time to the sunset time of the day (daylight hours), the sun is calculated only from the sunset time of the day until the sunrise time of the next day. It is also possible to stop the calculation of the position and the calculation of the ideal slat angle.

FIG. 3 is a diagram showing the incident angle of sunlight on the wall surface of the building, and FIG. 4 is a diagram showing the ideal slat angle. The method of calculating the ideal slat angle will be described with reference to FIGS.

The calculation of the ideal slat angle is roughly divided into the following four operations. That is, the operation unit 1
0 is the calculation (operation) of the sun position with respect to the earth and the building 6
, The calculation (operation) of the incident angle with respect to the wall surface 6a, and the calculation (operation) of the ideal slat angle.

First, when calculating (calculating) the position of the sun with respect to the earth, the position of the sun in the sky is represented by an altitude angle h and an azimuth angle A. The altitude angle h is measured upward from the horizon,
The azimuth A is measured westward with the south being 0. The altitude angle h and the azimuth angle A are determined from three parameters, the latitude Φ, the declination δ, and the hour angle T of the area.

It is assumed that the latitude Φ of the area is designated as the data of the building location. The declination δ is obtained from the date of the calculation, and the hour angle t is obtained from the calculation time as follows.

The day angle is calculated by examining the day of the year that corresponds to the date, setting the number to N, and obtaining an angle w having a cycle of one year. That is, the angle w is obtained as follows: w = 2πN / 366 (rad) (1) Here, w indicates a day angle (rad),
N indicates a date serial number with January 1 being 1 and December 31 being 366.

The calculation of declination is performed by the following equation. That is, δ = 0.006322−0.405748 · cos (w + 0.153231) −0.005880 · cos (2w−0.207099) −0.003233 · cos (3w−O.620129) (2) Is required. Here, δ indicates declination (rad).

Further, the calculation of the hour angle is performed by the following equation. That is, e = −0.0002779 + 0.122772 · cos (w + 1.4983111) −0.165458 · cos (2w−1.261546) −0.005354 · cos (3w−1.157100) (3) Is required. Here, e indicates the equation of time (h).

Next, the hour angle T is obtained by the following equation: T = π / 12 · ((t + e−12) + (Φ−135) / 15) (4) Here, T indicates an hour angle (rad), and t
Indicates the current time (h), and Φ indicates the building longitude (degrees).

Calculation (operation) of the sun position for the building 6
Is performed, first, the solar altitude with respect to the building 6 is obtained.
In this case, the building longitude Φ, the declination δ, and the hour angle T are determined by calculation, respectively.

When these angles and the angle representing the sun position (h: sun altitude, A: sun azimuth) are applied by spherical trigonometry, sinh = sinφ · sinδ + cosφ · cosδ · cosT (5) cosh · sinα = cosδ · sinT (6) The formula of the sun position is obtained as follows: cosh · cosα = −sinδ · cosφ + cosδ · sinφ · cosT (7) Here, h indicates the solar altitude (rad), φ indicates the building latitude (rad),
α indicates the azimuth (rad) with respect to the building 6.

The azimuth α for the building 6 is calculated by the above equation (6).
Is obtained by the following equation. Note that the azimuth α here is 0 degrees at true south, + is west, and − is east.
That is, sinα = cosδ · sinT / cosh (8)

When calculating (calculating) the incident angle with respect to the wall surface 6a of the building 6, first, the azimuth angle r with respect to the wall surface 6a is determined. As shown in FIG. 3, the azimuth angle r with respect to the wall surface 6a can be obtained by measuring an angle ε formed by the wall surface 6a with true south. That is, cosr = cos (α−ε) = cosα · cosε + sinα · sinε (10) Here, r: is the wall surface 6 of the sun
indicates the azimuth (rad) with respect to a, and ε indicates the angle [azimuth (rad)] formed by the wall surface 6a with true south.

The vertical incident angle P with respect to the wall surface 6a is
It is obtained by the following formula. That is, it is obtained from the equation: tanP = tanh / cosr = sinh / (cosh · cosr) (11) Here, P indicates a blind normal incidence angle (rad).

Finally, the case where the calculation (calculation) of the ideal slat angle is performed will be described. The ideal slat angle of the blind is determined by maximizing the slat opening while blocking direct sunlight.

Since the blind normal incidence angle P is obtained by the above equation (11), the slat angle θ satisfying the following condition is the ideal slat angle. That is, the slat angle θ that satisfies the condition of (W / S) · (sin (P + θ) / cosP) ≧ 1 (12) is the ideal slat angle. Here, θ indicates an ideal slat angle (rad), W indicates a slat width (mm), and S indicates a slat interval (mm). However, it is assumed that the slat width W and the slat interval S are set in the center device 1 or the like in advance. By the above-described calculation, the ideal slat angle θ is obtained.

As described above, the arithmetic unit 10 of the center device 1 calculates the sunrise time and the sunset time of the day in advance, and calculates the sun position only from the sunrise time to the sunset time of the day (sunshine time zone). By calculating the ideal slat angle and suspending the calculation from the sunset time on that day to the sunrise time on the next day, the load on the center apparatus 1 can be reduced and the traffic on the communication line 100 can be reduced. .

Further, since there is no need to provide a photodiode or an anti-reflection plate near each blind or window as in the related art, the system can be realized at low cost.
Since the maintenance of the photodiode and the anti-reflection plate is not required, the maintenance can be easily performed.

[0043]

As described above, according to the present invention, in an electronic blind system in which the elevation of a plurality of electronic blinds installed in a plurality of buildings and the angle of a slat are controlled collectively by a center device, a sunrise is set in advance. Calculate the time and sunset time, and calculate the ideal slat angle of the slats for blocking the sun position and direct light from the sun and introducing outside light into the room only from the sunrise time to the sunset time. By doing so, maintenance can be easily performed at low cost, and the load on the center device and the traffic on the communication line can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing functions of one embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of one embodiment of the present invention.

FIG. 3 is a diagram showing an incident angle of sunlight on a wall surface of a building.

FIG. 4 is a diagram showing an ideal slat angle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Center apparatus 2-1 and 2-2 Repeater 3-1 Blind control part 4-1 Switch panel 5-1 Blind motor 10 Operation part 11 Formula storage part 12 Clock part 13 Building position information storage part 14 Control period storage part 15 Blind information storage unit 16 Sunrise / sunset time storage unit 17 Data transmission unit

Claims (3)

[Claims] 1. An electronic blind system for integrally controlling a vertical movement of each of a plurality of electronic blinds installed in a plurality of buildings and an angle of a slat by a center device, wherein a sunrise time and a sunset time are calculated in advance. Means, calculating means for calculating the ideal slat angle of the slats for blocking the direct light from the sun and the sun and introducing outside light into the room, and the calculation based on the calculation result of the calculation means. An electronic blind system comprising: the center device; and control means for controlling the arithmetic operation by the arithmetic means to operate only during a period from a sunrise time to the sunset time. 2. The electronic blind system according to claim 1, wherein said arithmetic means is configured to calculate an ideal slat angle of said slat in accordance with a change in said sun position. 3. A plurality of control means provided corresponding to each of the plurality of electronic blinds and controlling the angle of the blade based on an ideal slat angle of the blade calculated by the calculation means. The electronic blind system according to claim 1 or 2, wherein: