JP2011196045A - Electric solar shading system and method for controlling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric solar shading system capable of reducing electric power consumption given by a detection means for detecting a position of a shading material.SOLUTION: This electric solar shading system includes a drive shaft for driving the shading material, a motor 9 for rotatively driving the drive shaft, the detection means 13 for detecting the amount of the rotation of the drive shaft, and a control device 15 for controlling an operation of a motor 9 on the basis of a command signal, while recognizing a position of the shading material on the basis of a detection signal output from the detection means 13. The electric solar shading system is also equipped with a power-off device 20 which shuts off power supply to the detection means 13 when the motor 9 is stopped.

Description

  The present invention relates to an electric solar shading device that lifts and lowers a solar shading material with a driving force of a motor.

  As one type of electric horizontal blind, there is one in which the slat lifting and lowering operation and the angle adjusting operation are performed by the driving force of one motor arranged in the head box. In such an electric horizontal blind, the operation of the motor is controlled based on an operation signal output from the operation switch or a command signal output from the central controller. And the raising / lowering operation and angle adjustment operation of a slat are performed by the drive shaft rotated by the drive force of a motor.

A control unit such as a microcomputer that controls the operation of the motor based on an operation signal or a command signal and an encoder that detects the amount of rotation of the drive shaft are disposed in the head box.
Then, the rotation amount of the drive shaft is detected based on the detection signal of the encoder, and the elevation height and the rotation angle of the slat are detected based on the rotation amount.

  In recent electric horizontal blinds, reduction of power consumption has become a major issue. Patent Document 1 discloses an electric blind that reduces power consumption by shutting off the supply of commercial power to a motor driving transformer when the blind is not operated. Patent Document 2 discloses an electric blind provided with an encoder that detects a rotational position of a slat angle adjusting shaft that is rotated by a motor.

JP2008-163577 Japanese Patent No. 3150906

  In the electric blind as described above, even when the motor is not operating, power is continuously supplied to the encoder, and the presence or absence of rotation of the drive shaft, that is, the height position and rotation angle of the slats are constantly detected. . Therefore, since the encoder consumes power constantly, there is a problem that power consumption cannot be sufficiently reduced.

  An object of the present invention is to provide an electric solar radiation shielding device capable of reducing power consumption by a detection means for detecting the position of a shielding material.

  In the first aspect of the present invention, the drive shaft that drives the shielding material, the motor that rotationally drives the drive shaft, the detection unit that detects the amount of rotation of the drive shaft, and the detection signal output from the detection unit, An electric solar shading device comprising a control device for controlling the operation of the motor based on a command signal while recognizing the position of the shielding material, and shuts off the power to the detecting means when the motor is stopped Equipped with equipment.

  According to a second aspect of the present invention, the control device, based on a detection signal of the detection means, position information calculation means for calculating shielding material position information when the motor is stopped, a storage device for storing the position information, And a restarting device that controls the operation of the motor based on the shielding material position information and the command signal when the motor is restarted.

According to a third aspect of the present invention, the power shut-off device supplies power to the detection means after the motor is stopped until the detection means no longer detects rotation of the drive shaft.
According to a fourth aspect of the present invention, the detection means includes an encoder that detects a slit of a slit plate that rotates integrally with the drive shaft, and outputs a two-phase rectangular wave having different phases as a detection signal, and the position information calculation means Comprises calculating a count value obtained by counting pulse signals based on the detection signal and a voltage level value of the detection signal when the motor is stopped as position information of the shielding material.

  According to a fifth aspect of the present invention, the restart device includes a voltage level value of the detection signal when the motor is stopped, which is stored as position information in the storage device, and a voltage level value of the detection signal when the motor is restarted. If they do not match, the count value stored as the position information is corrected.

  According to a sixth aspect of the present invention, the drive shaft is rotated by a motor to raise and lower the shielding material, and the rotation of the drive shaft is detected by a detecting means to recognize the position of the shielding material, and based on a command signal, the motor The operation is controlled, and the power supply to the detection means is cut off when the motor is stopped.

  In Claim 7, based on the detection signal of the said detection means, the shielding material position information at the time of the said motor stop is calculated, and it memorize | stores in a memory | storage device, and when the said motor restarts, the said shielding material position information and the said command signal Based on the above, the operation of the motor is controlled.

According to an eighth aspect of the present invention, after the motor is stopped, power is supplied to the detection unit until the detection unit stops detecting the rotation of the drive shaft.
According to a ninth aspect of the present invention, there is provided a count value obtained by detecting a slit of a slit plate that rotates integrally with the drive shaft, generating two-phase rectangular waves having different phases as detection signals, and counting pulse signals based on the detection signals. The voltage level value of the detection signal when the motor is stopped is calculated as position information of the shielding material.

  In claim 10, the voltage level value of the detection signal when the motor is stopped is compared with the voltage level value of the detection signal when the motor is restarted, and if it does not match, it is stored as the position information. Correct the count value.

  ADVANTAGE OF THE INVENTION According to this invention, the electric solar radiation shielding apparatus which can reduce the power consumption by the detection means which detects the position of a shielding material can be provided.

It is a front view which shows an electric horizontal blind. It is a block diagram which shows the electric constitution of an electric horizontal blind. It is a timing waveform diagram which shows a detection signal. It is a flowchart which shows operation | movement of a microcomputer. It is a flowchart which shows operation | movement of a microcomputer.

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In the electric blind shown in FIG. 1, multiple slats 3 are suspended and supported from a head box 1 through a plurality of ladder cords 2. A bottom rail 4 is suspended and supported at the lower end of the ladder cord 2. An upper end portion of the ladder cord 2 is supported by a ladder cord suspension device 5 in the head box 1.

  Elevating tape 6 is inserted in both longitudinal ends of the slat 3. The lower end of the elevating tape 6 is connected to the bottom rail 4, and the upper end thereof is wound around the elevating tape winding device 7 in the head box 1.

  A drive shaft 8 is inserted through the ladder cord suspension device 5 and the lifting tape winding device 7. One end of the drive shaft 8 is connected to the output shaft of the motor 9. Accordingly, the drive shaft 8 is rotated forward and backward by the operation of the motor 9.

  When the drive shaft 8 is rotated, each slat 3 is rotated via the ladder cord suspension device 5 and the ladder cord 2. When the drive shaft 8 is rotated forward, the lifting tape 6 is wound up by the lifting tape winding device 7, the bottom rail 4 is lifted, and the slat 3 is lifted. When the drive shaft 8 is reversed, the elevating tape 6 is rewound by the elevating tape winding device 7, and the bottom rail 4 and the slat 3 are lowered.

  A motor control unit 10 for controlling the operation of the motor 9 is disposed in the head box 1 and is connected to the motor 9 by a control wiring (not shown). A connector box 11 is disposed at one end of the head box 1, and an external communication cable is connected to the connector box 11.

  The motor control unit 10 is connected to the connector box 11 via an internal communication cable 12. Then, the control signal transmitted from the operation switch or the controller is supplied to the motor control unit 10 via the external communication cable and the internal communication cable 12.

  A power transformer 21 is disposed in the head box 1 adjacent to the connector box 11. Then, commercial power is supplied to the power transformer 21 via the connector box 11, and the commercial power is stepped down to a required voltage by the power transformer 21 and supplied to the power circuit of the motor control unit 10.

  The motor control unit 10 includes a power supply circuit that converts an AC voltage output from the power transformer 21 into a DC voltage, and the motor control unit 10 operates using the DC voltage as a power source.

  An encoder 13 is attached to the motor control unit 10. The encoder 13 includes two sets of detectors that detect the rotation angle of the slit plate 14 that rotates integrally with the drive shaft 8.

  FIG. 2 shows an electrical configuration of the motor control unit 10. The microcomputer 15 receives a command signal from an operation source 16 such as an operation switch or a central control device. When the command signal is input, the microcomputer 15 controls the operation of the motor 9 via the motor drive circuit 17 based on a preset program.

  A detection signal output from the encoder 13 is input to the microcomputer 15. In a state where the motor 9 is activated and the slit plate 14 is rotating, the encoder 13 detects the slits of the slit plate 14 with two sets of detectors each composed of a light emitting part and a light receiving part. As shown in FIG. 3, two-phase rectangular waves whose phases are shifted by 90 degrees are output as detection signals S1 and S2.

  The microcomputer 15 generates a calculation pulse signal P that rises based on the rise of one of the two-phase detection signals S1 and S2. The pulse signal P has a frequency four times that of the detection signals S1 and S2.

  The microcomputer 15 counts the number of pulses of the calculation pulse signal P based on the program. When the motor is stopped, a storage device constituted by an EEPROM using the count value of the calculation pulse signal P and whether the detection signals S1 and S2 are at the L level or the H level as position information of the slats 19 is stored.

  A power supply voltage V is supplied to the encoder 13 from the power supply circuit via a power supply switching circuit 20. A control signal is input to the power supply switching circuit 20 from the microcomputer 15 when the motor 9 is stopped. The power switching circuit 20 can shut off the power supply to the encoder 13 when the motor 9 is stopped.

Next, the operation of the electric blind as described above when the motor is stopped and when the motor is restarted will be described with reference to FIGS.
When a command signal for raising or lowering the slat or a command signal for adjusting the angle of the slat 3 is input from the operation source 16 to the microcomputer 15, the motor 9 operates in response to the command signal, and the slat 3 moves up and down. Or rotated. At this time, the microcomputer 15 generates the calculation pulse signal P based on the detection signals S1 and S2 output from the encoder 13, and counts the calculation pulse signal P to detect the height and angle of the slat 3. is doing.

  As shown in FIG. 4, when the raising / lowering operation or angle adjustment operation of the slat 3 based on the command signal is completed, the microcomputer 15 stops the operation of the motor 9 (step 1) and calculates the position information of the slat 3 when the motor is stopped. And stored in the storage device 19 (step 2).

  This position information includes the count value X1 obtained by counting the calculation pulse signal P when the motor 9 is operated, and the level values of the detection signals S1 and S2 when the motor 9 is stopped, that is, whether it is H level or L level. The stop level values are S1La and S2La.

  Next, the microcomputer 15 continues to monitor the detection signal of the encoder 13 for a predetermined time set in advance, for example, for about 1 minute (step 3). Then, after a predetermined time has elapsed, the microcomputer 15 compares the second count value X2, which is a value obtained by continuously counting the calculation pulse signal P up to now, with the first count value X1 (step 4).

  When the first count value X1 and the second count value X2 coincide with each other in step 4, the microcomputer 15 outputs a control signal to the power supply switching circuit 20 and stops the power supply to the encoder 13 (step 5).

  In step 4, when the first count value X1 and the second count value X2 do not match, the drive shaft 8 is slightly rotated by the weight of the bottom rail 4 and the like even though the motor 9 is stopped. In this case, the height or angle of the slat 3 is changed.

  In such a case, the process proceeds to step 2 to store the second count value X2 instead of the first count value X1, and the level values of the detection signals S1 and S2 at that time are set to the stop level value. The data is stored as S1La and S2La, and the process proceeds to step 3 where the detection signals S1 and S2 of the encoder 13 are monitored for 1 minute. Such an operation is repeated until the count values match before and after a predetermined time.

  As shown in FIG. 5, when a command signal for resuming the raising / lowering operation or angle adjustment operation of the slat 3 is input to the microcomputer 15 (step 11), the microcomputer 15 outputs a control signal to the power switch circuit 20. The power supply to the encoder 13 is restored (step 12).

  Next, monitoring of the level values of the detection signals S1 and S2 output from the encoder 13 is started (step 13), and the stop level values S1La and S2La are read from the position information stored in the storage device 19 when the motor is stopped. (Step 14).

  Then, the restart level values S1Lb and S2Lb, which are the current level values of the detection signals S1 and S2 detected in step 13, are compared with the stop level values S1La and S2La read from the storage device 19 (step 15).

  For example, when the motor stops at time t shown in FIG. 3, both the stop level values S1La and S2La read from the storage device 19 are at the L level. If the restart level value S1Lb of the detection signal S1 detected in step 13 is L level and the restart level value S2Lb of the detection signal S2 is H level, the microcomputer 15 causes the drive shaft 8 to operate in the slat descending direction. It is recognized that the signal P is rotated by one pulse.

  Next, the microcomputer 15 corrects the count value of the calculation pulse signal P stored in the storage device 19 (step 16). Subsequently, the motor 9 is operated based on the command signal, and the slat 3 is moved up and down or the angle is adjusted (step 17).

  Further, when the detection level values S1La and S2La of the detection signals S1 and S2 read from the storage device 19 in step 15 coincide with the restart level values S1Lb and S2Lb of the detection signals S1 and S2 detected in step 13 Then, the process proceeds to step 17.

In the electric horizontal blind configured as described above, the following operational effects can be obtained.
(1) When the operation of the motor 9 is stopped based on the command signal, the power supply to the encoder 13 can be cut off. Accordingly, when the elevating operation or the angle adjusting operation of the slat 3 is not performed, the detection operation by the encoder 13 can be stopped and the power consumption by the encoder 13 can be reduced.
(2) At the same time as the operation of the motor 9 is started based on the command signal, the power supply to the encoder 13 is restarted, and the encoder 13 detects the rotation amount of the drive shaft 8, that is, the position information of the slat 3. it can.
(3) When stopping the operation of the motor 9, the position information of the slat 3 when the motor is stopped based on the detection signal of the encoder 13 can be stored in the storage device 19. When the operation of the motor 9 is resumed, the position information of the slat 3 when the motor is restarted based on the detection signal of the encoder 13 and the position information when the motor is stopped stored in the storage device 19 can be compared. If the position information of the slats at the time of stopping and restarting the motor does not match, the position information of the slats 3 stored in the storage device 19 can be corrected to obtain the position information at the time of restarting the motor. . Therefore, even if the drive shaft 8 is slightly rotated while the detection operation of the encoder 13 is stopped, the position information of the slat 3 recognized by the microcomputer 15 and the actual position of the slat 3 can be matched.
(4) The power supply to the encoder 13 can be maintained for a predetermined time after the motor 9 is stopped, and the rotation of the drive shaft 8 due to the weight of the bottom rail 4 and the slat 3 can be detected by the encoder 13. The position information of the slat 3 when the drive shaft 8 is not rotated for a predetermined time can be stored in the storage device 19 as position information when the motor is stopped. Therefore, accurate position information when the motor 9 is stopped can be stored in the storage device 19.
(5) When the motor 9 is stopped, the position values of the level values of the detection signals S1, S2 whose phases are shifted by 90 degrees and the count value obtained by counting the calculation pulse signal P generated based on the detection signals S1, S2 Can be stored in the storage device 19. When the motor 9 is restarted, the level values of the detection signals S1 and S2 output from the encoder 13 and the level value stored in the storage device 19 are compared to determine the rotation of the drive shaft 8 while the motor 9 is stopped. When the presence or absence is detected and the drive shaft 8 is rotated, the count value stored in the storage device 19 can be corrected. Therefore, even if the drive shaft 8 is rotated while the detection operation of the encoder 13 is stopped, the position information of the slat 3 recognized by the microcomputer 15 and the actual position of the slat 3 can be matched.

You may implement the said embodiment in the following aspects.
The above-described control device and power shut-off device can be used as an electric vertical shaft that moves or adjusts the angle of a slat based on the rotation of a drive shaft that is driven by a motor, such as an electric scooping curtain or an electric pleated curtain. The present invention can also be applied to a mold blind, an electric curtain that transfers a curtain runner based on the operation of a motor, an electric louver that adjusts the angle of a louver based on rotation of a drive shaft that is driven to rotate by a motor.
The encoder 13 may be a magnetic type in addition to the optical type.

  DESCRIPTION OF SYMBOLS 1 ... Head box, 3 ... Shielding material (slat), 6 ... Lifting tape, 8 ... Drive shaft, 9 ... Motor, 13 ... Detection means (encoder), 14 ... Slit plate, 15 ... Control apparatus (position information calculation means, A power shut-off device, a restart device, a microcomputer), 19 a storage device, 20 a power shut-off device (power switching circuit), S1, S2 a detection signal.

Claims (10)

A drive shaft for driving the shielding material;
A motor that rotationally drives the drive shaft;
Detecting means for detecting the amount of rotation of the drive shaft;
In the electric solar radiation shielding device comprising a control device for controlling the operation of the motor based on a command signal while recognizing the position of the shielding material based on the detection signal output from the detection means,
An electric solar shading device comprising a power shut-off device for shutting off power to the detecting means when the motor is stopped. In the control device,
Position information calculating means for calculating shielding material position information when the motor is stopped based on a detection signal of the detecting means;
A storage device for storing the position information;
The electric solar radiation shielding device according to claim 1, further comprising a restarting device that controls an operation of the motor based on the shielding member position information and the command signal when the motor is restarted. The power shut-off device is
3. The electric solar radiation shielding apparatus according to claim 2, wherein after the motor is stopped, power is supplied to the detection means until the detection means no longer detects rotation of the drive shaft. The detection means includes
An encoder that detects a slit of a slit plate that rotates integrally with the drive shaft and outputs two-phase rectangular waves with different phases as a detection signal;
The position information calculation means includes
4. A count value obtained by counting pulse signals based on the detection signal and a level value of the detection signal when the motor is stopped are calculated as position information of the shielding material. The electric solar radiation shielding apparatus as described. The restart device is:
The level value of the detection signal at the time of stopping the motor stored as position information in the storage device is compared with the level value of the detection signal at the time of restarting the motor. The electric solar radiation shielding apparatus according to claim 4, wherein the counted value is corrected.   The drive shaft is rotated and driven by a motor to raise and lower the shielding material, the rotation of the drive shaft is detected by a detection means and the position of the shielding material is recognized, and the operation of the motor is controlled based on a command signal, A control method for an electric solar radiation shielding device, wherein power supply to the detection means is interrupted when the motor is stopped.   Based on the detection signal of the detection means, the shielding material position information at the time of stopping the motor is calculated and stored in the storage device, and when the motor is restarted, the shielding material position information and the command signal are used to The method of controlling an electric solar radiation shielding apparatus according to claim 6, wherein the operation of the motor is controlled.   8. The method of controlling an electric solar radiation shielding device according to claim 7, wherein after the motor is stopped, power is supplied to the detection means until the detection means no longer detects rotation of the drive shaft.   The slit of the slit plate that rotates integrally with the drive shaft is detected, two-phase rectangular waves with different phases are generated as detection signals, a count value obtained by counting pulse signals based on the detection signals, and when the motor is stopped 9. The method for controlling an electric solar radiation shielding apparatus according to claim 7, wherein the level value of the detection signal is calculated as position information of the shielding material.   The level value of the detection signal when the motor is stopped is compared with the level value of the detection signal when the motor is restarted, and if the values do not match, the count value stored as the position information is corrected. The control method of the electric solar radiation shielding apparatus of Claim 9 characterized by the above-mentioned.

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