JP2009102809A - Control unit of electric blind - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control unit of an electric blind, which can reduce noises during operations while reducing component costs. <P>SOLUTION: The electric blind makes a motor actuated on the basis of a voltage output from a control means, and makes a solar radiation shielding material ascend/descend on the basis of the actuation of the motor. The control means 2 and 4 comprise: first control means 2 and 4 for actuating the motor on the basis of a preset initial voltage at initial settings; a time measuring portion 7 for measuring an ascent/descent time when the solar radiation shielding material is lifted/lowered in a range from an upper limit to a lower one by the first control means; and second control means 2 and 4 for supplying an adjusting voltage, which becomes lower in the case of the shorter ascent/descent time, to the motor after the operation of the first control means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a control device that controls the lifting operation of an electric blind.

  The electric horizontal blind can move up and down the slat by rotating the slat drive shaft by the driving force of the motor and winding or unwinding the lifting cord or the lifting tape by the winding device.

  In such an electric horizontal blind, a motor is disposed in the head box, the rotation of the output shaft of the motor is decelerated by the gear box and transmitted to the drive shaft, and the slat is raised and lowered based on the rotation of the drive shaft. The

  In addition, an encoder for detecting the rotational speed and amount of rotation of the drive shaft is disposed in the head box, and the rotational speed of the motor is controlled by a controller disposed in the head box based on a pulse signal output from the encoder. And the amount of rotation is controlled. By such an operation, the raising / lowering speed of the slat is adjusted appropriately, and the raising / lowering stop position and the slat angle of the slat are controlled.

In the electric horizontal blind without an encoder, a preset voltage is supplied to the motor when the slat is driven. Therefore, the raising / lowering speed of the slat is not constant for each blind.
JP-A-6-272462

In general, in the electric horizontal blind, the lower the speed of raising and lowering the slats, that is, the rotational speed of the motor and gear box, the more noise generated during operation can be reduced.
In an electric horizontal blind equipped with an encoder, it is easy to reduce the noise by setting the rotational speed of the motor low by the speed detection function of the encoder. However, since the encoder needs to be provided, the cost increases. In addition, in order to stably detect the rotation speed with the encoder, it is necessary to ensure sufficient mounting accuracy of the encoder, which increases the assembly cost.

  On the other hand, in the electric horizontal blind without an encoder, since a constant voltage is supplied to the motor, a blind with a small load on the motor, that is, a blind with a low elevation height increases the raising / lowering speed and the noise increases. In addition, if the voltage supplied to the motor is set low in advance, there is a problem that the ascending / descending speed becomes slower than necessary due to a blind with a large motor load, which hinders the ascending / descending operation.

  Patent Document 1 discloses an electric blind in which when the motor load becomes small and the operation noise of the motor becomes large, the raising / lowering speed of the object to be operated is set low to reduce noise. ing. However, since an encoder is required for controlling the ascending / descending speed, there is a problem that the cost of parts cannot be reduced.

  An object of the present invention is to provide an electric blind control device capable of reducing noise during operation while reducing component costs.

  According to claim 1, in the electric blind that operates the motor based on the voltage output from the control unit and raises and lowers the solar radiation shielding material based on the operation of the motor, the control unit is set in advance at the time of initial setting. A first control unit that operates the motor based on an initial voltage; a time measuring unit that measures an ascending / descending time during which the solar shading material is moved up and down in a range from an upper limit to a lower limit by the first control unit; After the operation of the one control means, there is provided a second control means for supplying the motor with an adjustment voltage that becomes lower as the raising / lowering time is shorter.

According to a second aspect of the present invention, the second control means calculates a minimum level of the adjustment voltage necessary for pulling up the solar shading material based on the ascending / descending time and supplies the calculated voltage to the motor.
According to a third aspect of the present invention, the motor is constituted by a DC motor, and the first and second control means supply a pulse signal to the motor and supply a duty ratio of the pulse signal to the motor. To control the effective voltage.

According to a fourth aspect of the present invention, the first control means supplies a pulse signal having a preset duty ratio to the motor.
According to a fifth aspect of the present invention, the second control means includes a first table for calculating the adjustment voltage based on the elevation time.

According to a sixth aspect of the present invention, the first table can read the duty ratio corresponding to the elevation time.
In the seventh aspect, the second control means includes a current measuring unit that operates the motor based on a preset initial voltage and detects a maximum current value flowing through the motor, and the first table. A second table for calculating a compensation value for correcting the read duty ratio based on the maximum current value is provided.

  According to an eighth aspect of the present invention, the second table can read out a correction value that decreases the duty ratio as the maximum current value decreases.

  ADVANTAGE OF THE INVENTION According to this invention, the control apparatus of the electric blind which can reduce the noise at the time of operation | movement can be provided, reducing component cost.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric horizontal blind control device embodying the present invention will be described below with reference to the drawings.
FIG. 1 shows the electrical configuration of the control device. The input unit 1 receives an operation signal from the remote controller and outputs the received signal to the calculation unit 2. The detection unit 3 includes an upper limit switch and a lower limit switch, and outputs a detection signal to the calculation unit 2 when the slat (sunlight shielding material) is pulled up to the upper limit and when the slat is lowered to the lower limit.

  The motor control unit 4 controls the motor based on a control signal output from the calculation unit (control unit, first and second control unit) 2. This motor is composed of a DC motor, and the motor control unit 4 supplies a DC 12V pulse signal to the motor, for example. Then, the rotational speed of the motor is controlled by controlling the duty ratio of the pulse signal.

  When the duty ratio of the pulse signal output from the motor control unit (control means) 4 becomes high, that is, when the time during which the voltage of 12 V is supplied in one cycle of the pulse signal becomes long, the effective value of the supply voltage Becomes higher and the rotational speed increases.

  When a control signal is output from the calculation unit 2 to the motor control unit 4 to operate the motor, the current measurement unit 5 detects the current consumption value and outputs the detected current value to the calculation unit 2. The computing unit 2 converts an analog value output as a measured value from the current measuring unit 5 into a digital value, and stores the maximum value of the digital value in the storage unit 6 as a measured maximum current value i.

  The time measuring unit 7 measures the time until the slat is lowered from the upper limit to the lower limit by the operation of the motor, and outputs the time to the calculation unit 2. And the calculating part 2 stores the raising / lowering time in the memory | storage part 6 as measurement raising / lowering time t.

  The storage unit 6 stores a table for controlling the duty ratio of the pulse signal output from the motor control unit 4 and a program for controlling the motor control unit 4 by the calculation unit 2.

  FIG. 4 shows a first table 8 for selecting the duty reference value D based on the set ascending / descending time T when the slat is lowered from the upper limit to the lower limit. The unit of the set ascending / descending time T shown in the figure is second, and the duty reference value D is%. In the first table 8, for example, if the set up / down time T is 40 seconds, the duty reference value D is selected to be 90%. The duty reference value D is set to be larger as the set up / down time T is longer.

  FIG. 5 shows a second table 9 for correcting the selected duty reference value D based on the set maximum current value I based on the measured maximum current value i. In the second table 9, the unit of the set maximum current value I is A (ampere), and the unit of the correction value d is%. A correction value d is set for each of the four maximum set current values I.

  For example, if the set maximum current value I is in the range of 0.51 to 0.75 A, the correction value d is 3%, and the calculation unit 2 uses the value obtained by subtracting the correction value d from the duty reference value D as the set duty ratio. Output to the motor control unit 4.

  The power supply unit 10 supplies power to the calculation unit 2, the input unit 1, the detection unit 3, the motor control unit 4, the current measurement unit 5, the storage unit 6, and the time measuring unit 7. The storage unit 6 holds the measured rise / fall time t and the measured maximum current value i in a state where the power is supplied, and holds the measured rise / fall time t and the measured maximum current when the supply of power is interrupted. The value i is cleared.

Next, the initial setting operation of the control device configured as described above will be described with reference to FIGS. FIG. 2 shows an operation of measuring the measurement ascending / descending time t and setting the set ascending / descending time T.
After the electric horizontal blind is installed at the installation location, when the initial setting operation of the control device is started, the lowering operation of the slat is first started by operating the remote controller.

  Then, the calculation unit 2 sets a duty ratio of 70% as a set duty ratio Dm as an initial voltage to be supplied to the motor as an initial voltage (step 1), and operates the motor at the set duty ratio Dm to set the slat at the upper limit position. (Step 2). In this state, the effective value Vm of the power supply voltage supplied to the motor is V × Dm ÷ 100, where V is the power supply voltage.

  In step 2, measurement of the measurement raising / lowering time t is started simultaneously with the start of operation of the motor. Next, the motor is operated until the stop signal is not received by the input unit 1 and the lower limit detection signal is input from the detection unit 3 (steps 3 and 4). In this state, the slat descends from the upper limit to the lower limit.

In step 3, when a stop signal is inputted, the operation of the motor is stopped (step 8), and the setting operation of the measurement setting time t is ended.
When the lower limit detection signal is received in step 4, the calculation unit 2 proceeds to step 5 to stop the operation of the motor, stops the measurement lift time t, and stores the measurement lift time t in the storage unit 6.

  Next, the calculation unit 2 proceeds to step 6 and sets the measured lift time t as the set lift time T when the set lift time T is 0, that is, when the set lift time T is not set (step 7). Then, the setting operation of the set up / down time T is finished. This set ascending / descending time T becomes longer as the ascending / descending height of the electric horizontal blind is higher.

In step 6, when the set ascending / descending time T has already been set, the setting operation is ended without setting the measured ascending / descending time t as the set ascending / descending time T.
Next, the calculation unit 2 measures the measured maximum current value i and shifts to an operation for setting the set maximum current value I. As shown in FIG. 3, the calculation unit 2 first determines whether any of the set ascending / descending time T and the set maximum current value I is set (step 11).

  Here, since only the set ascending / descending time T is set, the calculation unit 2 proceeds to step 12 and selects the value of 95% that is the highest duty reference value D of the first table 8 to set the set duty. The ratio Dm is output to the motor control unit 4.

  Then, the motor control unit 4 operates the motor with a set duty ratio Dm of 95%, and raises the slat from the lower limit toward the upper limit (step 3). In this state, the effective value Vm of the power supply voltage supplied to the motor is V × Dm ÷ 100, where V is the power supply voltage.

  In step 13, the measurement maximum current value i starts to be measured simultaneously with the start of the motor operation, and the measurement maximum current value i is sequentially stored in the storage unit 6. Next, the motor is operated until the stop signal is not received by the input unit 1 and the upper limit detection signal is input from the detection unit 3 (steps 14 and 15). In this state, the slat is raised from the lower limit to the upper limit.

In step 14, when a stop signal is input, the calculation unit 2 stops the operation of the motor (step 19) and ends the setting operation.
When the upper limit detection signal is received at step 15, the calculation unit 2 proceeds to step 16 to stop the operation of the motor, stops the measurement maximum current value i, and stores the measurement maximum current value i in the storage unit 6. .

  Next, the calculation unit 2 proceeds to step 17 and sets the measured maximum current value i as the set maximum current value I when the set maximum current value I is 0, that is, when the set maximum current value I is not set. (Step 18), the setting operation is terminated. The set maximum current value I indicates that the larger the value, the greater the load on the motor.

If the set maximum current value I has already been set in step 17, the setting operation is terminated without setting the measured maximum current value i as the set maximum current value I.
By such an operation, the slat is raised from the lower limit to the upper limit based on the set duty ratio Dm of 95%, and the measured maximum current value i in that case is stored in the storage unit 6 as the set maximum current value I. Then, the setting operation of the set ascending / descending time T and the set maximum current value I is completed by the operations so far.

  Thereafter, the set duty ratio Dm is calculated based on the set up / down time T, the set maximum current value I, and the first and second tables 8 and 9 at the time of the slat pulling operation, and the up and down at the set duty ratio Dm. Operation is performed. The operation will be described with reference to FIG.

  When an operation signal is input to the input unit 1 and the slat pulling operation is started, the set ascending / descending time T and the set maximum current value I are already set in the storage unit 6 in step 11, and the process proceeds to step 20. To do. Then, the duty reference value D corresponding to the set up / down time T is read from the first table 8, and the correction value d corresponding to the set maximum current value I is read from the second table 9.

  Here, for example, if the set up / down time T is 30 seconds, the duty reference value D is read as 80%, and if the set maximum current value I is 0.26 to 0.50 A, the correction value d is A value of 6% is read.

Next, in step 21, the set duty ratio Dm is calculated by subtracting the correction value d from the duty reference value D. Here, the set duty ratio Dm is 80−6 = 74%.
Next, the routine proceeds to step 13 where the slat pulling operation is performed based on the set duty ratio Dm (adjustment voltage), and the slat is pulled up until the detection signal from the upper limit switch is input without the stop signal being input. (Steps 14-17, Step 19).

At this time, the measured maximum current value i is measured, but since the set maximum current value I has already been set, a new set maximum current value I is not set.
With the above operation, the set up / down time T and the set maximum current value I are set by the up / down operation of the first blind of the slat. Thereafter, the motor operates at the set duty ratio Dm calculated from the duty reference value D and the compensation value d read from the first and second tables 8 and 9 based on the set up / down time T and the set maximum current value I. Then, the raising / lowering operation is performed.

  And, as the set up / down time T is shorter, the up / down height of the slats is lower and the load on the motor is smaller, so a lower duty ratio is set based on the first table 8. Therefore, the ascending / descending speed of the slat, that is, the rotational speed of the motor and the gear box is suppressed, and noise is reduced.

  Further, even if the set ascending / descending time T is the same, the lower the set maximum current value I, the lower the load on the motor. Therefore, even if the duty ratio is lower than the duty reference value D set in the first table 8, it is sufficiently slatted. Can be moved up and down. Therefore, by subtracting the correction value d based on the set maximum current value I from the duty reference value D, the set duty ratio Dm is further lowered to reduce noise. The duty reference value D and the correction value d in the first and second tables 8 and 9 are the minimum values at which the set duty ratio Dm calculated based on the set up / down time T and the set maximum current value I can move up and down the slats. It is set to be the duty ratio of the level.

In the control device for an electric blind configured as described above, the following operational effects can be obtained.
(1) Without using an encoder, the supply voltage to the motor can be automatically lowered within a range in which the slat can be raised and lowered, and the rotational speed of the motor and gear box can be reduced to reduce noise. . Therefore, noise can be reduced by a low-cost control device that does not include an encoder.
(2) A descent operation from the upper limit to the lower limit of the slat is performed at a preset duty ratio Dm to obtain a set up / down time T, and a duty reference value selected in the first table 8 according to the set up / down time T D can be set as a new set duty ratio Dm. The shorter the set ascending / descending time T, the lower the slat ascending / descending height and the smaller the load on the motor. By making the first table 8 select a lower set duty ratio Dm, the voltage supplied to the motor is substantially reduced. Can be reduced. Therefore, the rotational speed of the motor and gear box can be reduced to reduce noise.
(3) The set duty ratio Dm with the duty reference value D obtained from the first table 8 based on the set up / down time T and the correction value d obtained from the second table 9 based on the set maximum current value I Can be calculated. Since the motor load is smaller as the set maximum current value I is smaller, the set duty ratio Dm selected in the first table 8 can be corrected based on the second table 9. Therefore, based on the set up / down time T and the set maximum current value I, the effective voltage supplied to the motor can be further reduced to reduce noise.
(4) When a plurality of electric horizontal blinds are arranged side by side and are moved up and down by a common remote controller, the speed at which noise can be reduced can be automatically set according to the motor load of each blind. Therefore, the noise level of the plurality of electric horizontal blinds operating in parallel can be reduced.
(5) Blinds having the same left-right width and low height of the slats have a short ascending / descending time. Therefore, the effective voltage supplied to the motor is reduced by the correction based on the set ascending / descending time T, and noise can be reduced.
(6) A blind with a narrow left and right width of slats with the same elevation height has a small motor load. Therefore, the optimum effective voltage is supplied to the motor by the correction value d based on the set maximum current value I to reduce noise. Can be reduced.

You may implement the said embodiment in the following aspects.
・ Because the motor load differs between when the slat is pulled up and when the slat is lowered, different tables may be prepared for the slat lifting operation and the lowering operation, and the lifting control may be performed with different duty ratios. .
The set duty ratio Dm generated based on the first and second tables 8 and 9 may be generated by calculating with the calculation unit 2 based on a preset program.
-In the calculating part 2, after repeating the descending operation | movement of a blind, the average value t-ave of several measurement raising / lowering time t is calculated, and a duty ratio is calculated | required based on the average value t-ave in steps 20-21. Good.
The measurement raising / lowering time t-up from the lower limit to the upper limit may be measured, and the duty ratio may be corrected by setting a rising duty table based on the measurement raising / lowering time t-up. In this case, the correction is not repeated.
-The control apparatus of the said embodiment can also be used as control apparatuses, such as an electric roll blind, an electric pleat curtain, and an electric scooping curtain.

It is a block diagram which shows the control apparatus of an electric horizontal blind. It is a flowchart which shows operation | movement of a control apparatus. It is a flowchart which shows operation | movement of a control apparatus. It is explanatory drawing which shows a 1st table. It is explanatory drawing which shows a 2nd table.

Explanation of symbols

  2 ... Control means (first control means, second control means, arithmetic unit), 4 ... Control means (first control means, second control means, motor control unit), 7 ... Timekeeping unit, 8 ... 1st table, 9 ... 2nd table.

Claims (8)

In the electric blind that operates the motor based on the voltage output from the control means, and raises and lowers the solar radiation shielding material based on the operation of the motor,
The control means includes
A first control means for operating the motor based on a preset initial voltage at the time of initial setting;
A time measuring unit for measuring an ascending / descending time during which the solar shading material is moved up and down in a range from an upper limit to a lower limit by the first control unit;
After the operation of the first control means, there is provided a control apparatus for an electric blind, comprising: a second control means for supplying an adjustment voltage, which becomes a lower voltage as the ascending / descending time is shorter, to the motor.   The said 2nd control means calculates the said minimum adjustment voltage required in order to raise the said solar radiation shielding material based on the said raising / lowering time, and supplies it to the said motor. Electric blind control device.   The motor is constituted by a DC motor, and the first and second control means supply a pulse signal to the motor and control the effective voltage supplied to the motor by controlling the duty ratio of the pulse signal. The control device for an electric blind according to claim 1 or 2, characterized in that: The first control means includes
4. The electric blind control device according to claim 3, wherein a pulse signal having a preset duty ratio is supplied to the motor. The second control means includes
5. The electric blind control device according to claim 1, further comprising a first table for calculating the adjustment voltage based on the ascending / descending time. 6. The first table is:
6. The electric blind control device according to claim 5, wherein a duty ratio corresponding to the ascending / descending time can be read out. The second control means includes
A current measurement unit that operates the motor based on a preset initial voltage and detects a maximum current value flowing through the motor;
The control device for an electric blind according to claim 6, further comprising a second table for calculating a correction value for correcting the duty ratio read in the first table based on the maximum current value. .   8. The control device for an electric blind according to claim 7, wherein the second table is capable of reading a correction value for decreasing the duty ratio as the maximum current value is smaller.

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