JP2640997B2 - Blind opening and closing control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blind opening / closing control device capable of automatically opening / closing a blind by an optical sensor.

[0002]

2. Description of the Related Art A blind is a device installed in a window to prevent direct sunlight from entering a room. In a general use state, a blind takes in as much indirect light (radiation light) as possible into the room, and It is desirable to minimize the line of sight to the camera. Therefore, it is necessary to appropriately open and close the blinds according to outdoor conditions such as the position of the sun and weather. However, manually opening and closing such a blind is troublesome, and it is not realistic to manually open and close the blind when the blind is installed in a building or the like.

Therefore, various devices have been provided which detect sunlight and automatically open and close the blinds according to the amount of light. The blind opening / closing control device includes an opening / closing mechanism for opening / closing the blind, an optical sensor for detecting outdoor sunlight, and control for providing a blind opening / closing control signal to the opening / closing mechanism in response to a detection signal from the optical sensor. A circuit having a circuit is generally used.

According to the blind opening / closing control device, when direct sunlight is detected, the control circuit issues a fully closing command to the opening / closing mechanism based on a detection signal from the optical sensor to completely close the blind. . Further, when it becomes cloudy or the like, the control circuit issues a fully open command to the opening / closing mechanism based on the detection signal from the optical sensor to fully open the blind. At this time, a timer is provided in the control circuit, and in order to prevent the blind from repeatedly opening and closing and fluttering due to the light amount being an intermediate value between opening and closing, for example, every 30 minutes to one hour, etc. First, the detection signal from the optical sensor is sampled to determine the open / close state.

[0005]

However, in the above-described blind opening / closing control device, as shown in FIG. 5, for example, it becomes cloudy until time t1 and time t1 to t2.
Until time t2, cloudy from time t2 to t3, and after time t3 sunny, and the determination sampling is performed at a fixed time interval t1.
.. 0, t11, t12,..., Etc., it was cloudy at the judgment sampling (time t10), so once the blinds were opened, no judgment was made until the next judgment sampling (time t11). Even if it changes from cloudy to sunny, the blinds do not open and close, so they do not serve as blinds.

Similarly, in the blind opening / closing control device, as shown in FIG. 5, when it is determined that the blind is fine at the judgment sampling (time t12) and the blind is closed once, the next judgment sampling (time t13). Since the judgment is not performed until this time, even if it changes to cloudy or sunny during this time, the blind is not opened and closed, so it does not serve as a blind. Furthermore, if the judgment sampling is performed before time t1, the blind is open because it is cloudy, and if the next sampling is performed between time t2 and t3, the blind is open again because it is cloudy. Even if the sunny time continues for a long time before and after that, the blinds are not opened and closed, which is even more unreasonable.

As described above, in the above-described blind opening / closing control apparatus, since the opening / closing is determined only at fixed intervals, there is a drawback that the blind does not open / close even if the weather changes during this period, so that it does not match reality. Had occurred. Therefore, an object of the present invention is to provide a blind opening / closing control device capable of automatically opening / closing a blind in accordance with outdoor weather conditions.

[0008]

According to the present invention, there is provided a blind opening / closing control device , comprising:
A blind having an opening and closing mechanism that opens and closes each of the blades according to an open control signal or a close control signal, an optical sensor that detects outdoor sunlight and outputs a detection signal, and a predetermined time.
First timer used to sample at intervals
-And a time interval longer than the time interval of the first timer
A second timer used to sample at
Provided in which, in a state in which the blind is opened normally a detection signal from the pre-Symbol light sensors Ri by the first timer
When sampling , and the sampled detection signal
Output a close control signal when it is determined
And start the second timer.
From the light sensor only at the time interval by timer 2
, And a second timer
Open based on the detection signal sampled at
Output the open control signal only when it is determined that
Shift to sampling processing by the first timer
And a control circuit adapted to perform the control.

[0009]

According to the above construction, the sampling for operating the blind from the open state to the closed state is always performed at the time interval of the first timer, and once the blind is closed, the second timer performs the operation at regular intervals. Since the sampling for the opening operation is performed and the sampling is performed at the time interval by the second timer until the opening determination is made, the opening and closing of the blind can be controlled in accordance with the current situation outdoors.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 2 is a diagram showing the area around the blind to which the embodiment of the blind opening / closing control device of the present invention is applied. In this embodiment, in FIG. 2, the window 1 is provided with a blind 2 on the outdoor side of the glass G so as to be openable and closable. The blind 2 has a closing mechanism 3, so that it is open <br/> closed the blades 5 of the blind 2 by opening and closing mechanism 3 installed in the window frame or the like. An optical sensor 4 for detecting direct sunlight is provided above the window 1.

FIG. 1 is a block diagram showing a basic configuration of an embodiment of a blind opening / closing control device according to the present invention.
In FIG. 1, an optical sensor 4 detects sunlight, and outputs a detection signal according to the intensity of sunlight. Such an optical sensor 4 is connected to the control circuit 7 and inputs these detection signals to the control circuit 7. The control circuit 7
Although not shown, it includes, for example, a pre-processing circuit for performing processing such as amplification and filtering of the detection signals, an AD converter, a one-chip CPU, and the like.

The control circuit 7 includes a first timer Ta and a second timer Tb. The first timer Ta always (for example, every one second) detects a detection signal from the optical sensor 4. And the second timer Tb starts when the blind 2 is closed, and samples the detection signal from the optical sensor 4 every fixed time (for example, 30 minutes to 1 hour). It is used. The control circuit 7 is connected to the opening / closing mechanism 3 and controls the driving of the opening / closing mechanism 3 by the control circuit 7.

The operation of the above embodiment will be described. FIG.
5 is a timing chart for explaining the operation of the present invention. FIG. 4 is a flowchart for explaining the operation of the embodiment of the present invention. The operation of the flowchart shown in FIG. 4 is executed by the one-chip CPU of the control circuit 7. First, when the operation of the blind opening / closing control device is started, initialization is performed. Here, the control circuit 7
A command to fully open the blind 2 is output to the opening / closing mechanism 3 regardless of the detection signal from the optical sensor 4 (FIG. 4).
Step S100). Then, since the control circuit 7 has issued the fully open command, the flag F is set to "0" to know the state later (step S101). Next, the control circuit 7 resets the timers Ta and Tb provided therein, and starts the timer Ta (step S102). Here, the timer Ta is capable of giving a sampling instruction, for example, at one-second intervals so that sampling can be performed at all times.

Now, as shown in FIG. 3, for example, at time t3
Cloudy until 1; clear from time t31 to t32; time t32
It is assumed that the initial setting has been performed when the cloudy weather has been reached until time t33 and the weather has been fine after time t33. First, at time t31
The control circuit 7 uses the timer Ta
It is determined whether or not a predetermined time (1 second) has elapsed, and when time tn1 is reached (step S103), a detection signal from the optical sensor 4 is captured (step S104).

In the control circuit 7, since the flag F is "0" (step S105), the blind 2
(Step S106). In this case, since the detection signal taken into the control circuit 7 from the optical sensor 4 becomes a closing light amount (step S106), the control circuit 7 outputs a closing control signal to the opening / closing mechanism 3 (step S107). As a result, the blind 2 is closed.

Next, the control circuit 7 sets "1" to the flag F (step S108) and starts the timer Tb (step S109). Here, the control circuit 7 determines whether the timer Tb has reached a predetermined time (for example, 30 to 60 minutes from the start) (Step S).
110), when it reaches, the timer Tb is reset (step S111), and the detection signal from the optical sensor 4 is captured (sampled) (step S104). Then, since the flag F is "1" (step S105), the control circuit 7 determines whether or not the detection signal from the optical sensor 4 is the amount of light to be fully opened (step S112). At the time of this determination (time tn2), in this embodiment, the time t
Since it is between 32 and t33 and the period is cloudy,
The light amount is the amount to open (step S112), and the control circuit 7
Outputs an open control signal to the opening / closing mechanism 3 (step S1).
13), “0” is set to the flag F (step S11)
4), the process proceeds to resetting the timers Ta and Tb and starting the timer Ta (step S102). As a result, the blind 2 is opened.

Next, at time tn3 of the timer Ta, it is cloudy between times t32 and t33 in FIG.
The control circuit 7 performs the processing of steps S103 to S106, and keeps the blind 2 open. Further, at the time tn4 of the timer Ta, the time is after the time t33 in FIG.
After performing the processes of 3 to S106, a closing control signal is output to the opening / closing mechanism 3 (step S107), the blind 2 is closed, and the processes of steps S107 to S111 are performed thereafter. When the time tn5 of the timer Tb is reached (step S5).
111), the control circuit 7 returns to steps S104 and S1 again.
05, the process of S112 is performed, but since it is clear from time t33 in FIG. 3, the process proceeds to the process of step S109 after the determination of the light amount (step S103).

As described above, in the above embodiment, the blind 2
Is operated constantly (for example, every 1 second) using a timer Ta, and from the time when the blind 2 is closed, at a constant interval (for example, 30 minutes to 30 minutes) using the timer Tb. Sampling for the opening operation is performed every 60 minutes), and the blind 2 is kept closed until an open determination is made at the time of the determination. In the above embodiment, the horizontal blind 2 has been described, but the vertical blind 2 can be similarly applied. In the above embodiment, the example in which the blind 2 is installed on the outdoor side is shown. However, even if the blind 2 is installed on the indoor side, the same effect can be obtained. It is needless to say that the modified example is possible.

[0019]

As described above, in the blind opening / closing control apparatus of the present invention, sampling for operating the blind from opening to closing is always performed, and sampling for opening is performed at regular intervals from the time of closing. Since the sampling is performed at the time interval until the opening is determined, there is an effect that the blind can be automatically opened and closed according to the current outdoor condition.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a blind opening / closing control device according to the present invention.

FIG. 2 is a view showing a blind portion according to the embodiment of the present invention.

FIG. 3 is a diagram for explaining the operation of the present invention.

FIG. 4 is a flowchart for explaining the operation of the present invention.

FIG. 5 is a diagram for explaining an operation example of a conventional blind opening / closing control device.

[Explanation of symbols]

 Reference Signs List 1 window 2 blind 3 opening / closing mechanism 4 optical sensor 7 control circuit Ta (first) timer Tb (second) timer

Claims (1)

(57) [Claims] 1. A blade installed in a window or the like so as to be openable and closable, and
A blind having an opening and closing mechanism for opening and closing each of the blades according to an open control signal or a close control signal, an optical sensor that detects outdoor sunlight and outputs a detection signal, and is used for sampling at predetermined time intervals. First
Longer than the time interval of the first timer and the first timer
The second used to sample at
And a timer, said in a state in which the blind is open constantly samples the detection signals from the first by Ri before Symbol light sensors on the timer, and then the sampled
Closed when it is determined that the amount of light is closed based on the detected detection signal
Control signal and start the second timer.
The optical cell only at the time interval set by the second timer.
Sampling the detection signal from the
The detection signal sampled at the time interval of
An open control signal is output only when it is determined that the
Sampling with the first timer
And a control circuit for shifting to processing .