JP6985973B2 - Electric curtain control device and electric curtain control method - Google Patents

Description

The present invention relates to a control device for an electric curtain and a control method for the electric curtain, and more particularly to a control device for the electric curtain and a control method for the electric curtain that suppresses repulsion when the electric curtain is fully opened.

Conventionally, a plurality of curtain runners (hereinafter, also simply referred to as "runners") that run via a belt of a curtain rail by an electric motor are provided, and the curtain is electrically operated with the upper part of the curtain attached to the plurality of runners. There is an electric opening and closing curtain that opens and closes.

In such an electric opening / closing curtain (hereinafter, also simply referred to as "electric curtain"), limit switches are provided at the fully closed position and the fully open position of the curtain, so that the runner can fully open and close the curtain. It is stopped in the closed position and the fully open position.

However, in practice, when the curtain is suspended by the runner and the electric motor is stopped immediately after the curtain is moved to the fully open position by the driving force of the electric motor, the fabric of the curtain folded in the fully open position becomes It has elasticity, and the repulsive force may cause the folded curtain to move again in the fully closed direction. Since such a phenomenon occurs when the curtain is fully opened in the electric curtain, the appearance to the user is not good.

Therefore, in the control device for the electric open / close curtain, the return position when the curtain repels and returns is stored, and when the curtain is fully opened thereafter, the return position is set as the stop position when the curtain is fully opened. As a result, there is no repulsion and the appearance can be improved for the user (see, for example, Patent Document 1).

Japanese Patent No. 5553995

However, in the above-mentioned electric opening / closing curtain, it cannot be said that the curtain is opened to the fully open position, and even if a full opening command is received, there is a problem that the curtain is only moved to a halfway position.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a control device for an electric curtain and a control method for the electric curtain, which can suppress the return of the curtain from the fully open position and improve the appearance to the user. It is to be.

In order to achieve the above object, the present invention is an electric curtain control device for controlling the opening and closing of a curtain by rotating a belt along a curtain rail with an electric motor to move a runner, and opening the curtain. An open request recognition unit that recognizes a request, a clutch drive unit that engages the electric motor and the belt by turning on a clutch member that transmits the power of the electric motor to the belt, and the electric motor and the belt. A motor drive unit that executes the opening operation of the curtain by driving the electric motor to move the runner, a detection unit that detects that the curtain has reached the fully open position, and the above. When it is detected that the curtain has reached the fully open position, the motor drive unit stops driving the electric motor, and from that point on, the clutch member gradually engages the electric motor with the belt at predetermined time intervals. It is equipped with a clutch control unit that weakens.

In the present invention, it is preferable that the clutch control unit controls the engagement state between the electric motor and the belt by the clutch member by a PWM signal.

In the present invention, it is preferable that the clutch control unit reduces the duty ratio of the PWM signal at each predetermined time interval to finally make the duty ratio 0.

In the present invention, it is preferable that the motor drive unit drives and controls the electric motor by a PWM signal.

The present invention is a method for controlling an electric curtain that controls the opening and closing of the curtain by rotating a belt along the curtain rail with an electric motor to move a runner, and the opening request recognition unit recognizes the opening request of the curtain. The open request recognition step, the clutch drive step in which the clutch member that transmits the power of the electric motor to the belt is turned on by the clutch drive unit to fasten the electric motor and the belt, and the electric motor and the belt. The motor drive step for executing the opening operation of the curtain by driving the electric motor by the motor driving unit to move the runner, and the detection unit for detecting that the curtain has reached the fully opened position. When it is detected that the curtain has reached the fully open position, the motor drive unit stops driving the electric motor, and from that point onward, the electric motor and the electric motor by the clutch member are used at predetermined time intervals. It has a clutch control step that controls the engagement state with the belt so as to be gradually weakened by the clutch control unit.

According to the present invention, it is possible to realize a control device for an electric curtain and a control method for the electric curtain, which can suppress the return of the curtain from the fully open position and improve the appearance to the user.

It is a schematic diagram which shows the fully closed state of the electric curtain which concerns on embodiment of this invention. It is a schematic diagram which shows the fully open state of the electric curtain which concerns on embodiment of this invention. It is a schematic diagram which shows the internal structure of the curtain rail which concerns on embodiment of this invention. It is an external perspective view which shows the structure of the control device which concerns on embodiment of this invention. It is a block diagram which shows the circuit structure of the control device which concerns on embodiment of this invention. It is a functional block diagram which shows the structure of the control part of the control apparatus which concerns on embodiment of this invention. It is a functional block diagram which shows the structure of the PWM signal generation part for driving a motor which concerns on embodiment of this invention. It is a functional block diagram which shows the structure of the PWM signal generation part for clutch drive which concerns on embodiment of this invention. It is a graph which provides the explanation of the control time t when the duty ratio of the PWM signal which concerns on the clutch control which concerns on embodiment of this invention is adjusted at a predetermined time interval. It is a flowchart which provides the explanation of the clutch control method which concerns on embodiment of this invention.

<Embodiment>
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 relates to an embodiment of the present invention.

Here, for convenience of explanation, in FIGS. 1 to 4, the horizontal direction (arrow ab direction) is the opening / closing direction of the curtain, particularly the left side in the figure is the closed side (arrow a direction) in which the curtain closes, and the right side in the figure is the curtain. Open side (direction of arrow b). Further, the vertical direction (arrow cd direction) is the curtain hanging direction, particularly the upper side in the figure is the ceiling side (arrow c direction), and the lower side in the figure is the floor side (arrow d direction).

<Overall configuration of electric curtain>
As shown in FIGS. 1 and 2, the electric curtain 1 is a single-sided electric curtain, and mainly includes a curtain rail 2, a curtain material 3, and a motor control unit 4. The electric curtain 1 is not limited to the single-opening type, and may be a double-opening type.

The curtain rail 2 is a rail-shaped member extending in the horizontal direction (arrow ab direction), and a plurality of runners 5 are movably attached together with the belt 7 in the horizontal direction (arrow ab direction), and the curtains are attached to the plurality of runners 5. A hanging tool 6 for holding the material 3 in a suspended state is attached.

Further, as shown in FIG. 3, the runner 5 is coupled to an endless belt 7 running in the curtain rail 2. The belt 7 is coupled to a pulley 14 that moves the belt 7.

Therefore, as the runner 5 moves with the movement of the belt 7 in the horizontal direction (arrow ab direction), the curtain material 3 moves from the closed side (arrow a direction) to the open side (arrow b direction) or open side (arrow b direction) together with the runner 5. It is moved from the arrow b direction) to the closed side (arrow a direction).

Of the plurality of runners 5, the runner 5 located on the most closed side (arrow a direction) in the horizontal direction (arrow ab direction) is for detecting the position of the curtain material 3 as shown in FIG. Runner (hereinafter, this is also referred to as "curtain position detection runner") 5s.

The curtain material 3 is suspended from the curtain rail 2 via a hanging tool 6, and the curtain material 3 is folded from the closed side (arrow a direction) to the open side (arrow b direction) of the curtain rail 2. Then, a window (not shown) is exposed, and when the curtain material 3 is pulled out from the open side (arrow b direction) of the curtain rail 2 toward the closed side (arrow a direction), the window (not shown) is covered.

<Motor control unit configuration>
As shown in FIGS. 4 and 5, the motor control unit 4 drives the electric motor 11, the electromagnetic clutch 12 attached to the rotating shaft 11a of the electric motor 11, the rotation detector 13, the electric motor 11, and the electromagnetic clutch 12. A control device 15 for controlling is provided.

The electric motor 11 is, for example, a DC brushless motor, and the rotation shaft 11a is rotated as desired by a PWM (Pulse Width Modulation) signal (hereinafter, also referred to as a “motor driving PWM signal”) supplied from the control device 15. It is a drive source that is driven to rotate in numbers, torques, angles, and the like.

The electromagnetic clutch 12 as a clutch member has an output-side rotating shaft 12a connected to a pulley 14 (FIG. 3) for traveling the belt 7. The electromagnetic clutch 12 is a power transmission mechanism, and utilizes the electromagnetic force generated in response to the energization of the coil so as to transmit the power of the rotary shaft 11a of the electric motor 11 to the pulley 14 via the output side rotary shaft 12a. To conclude.

Further, the electromagnetic clutch 12 releases the power of the rotary shaft 11a of the electric motor 11 so as not to be transmitted to the pulley 14 via the output side rotary shaft 12a. The electromagnetic clutch 12 is also controlled by a PWM signal supplied from the control device 15 (hereinafter, this is also referred to as a “clutch drive PWM signal”).

The rotation detector 13 as a detection unit includes a slit plate 13a integrally attached to the output side rotation shaft 12a of the electromagnetic clutch 12, and an optical sensor 13b. The slit plate 13a is a disk-shaped member, and a plurality of recesses are formed at equal intervals in the circumferential direction with respect to the outer peripheral edge thereof. The optical sensor 13b includes a light emitting element such as an LED and a light receiving element such as a photodiode.

The rotation detector 13 receives the light that has passed through the recess of the rotating slit plate 13a by the optical sensor 13b, captures the row of the light as a pulse signal, and outputs the pulse signal to the control device 15 of the motor control unit 4. do. The control device 15 can detect the moving distance, the moving speed, and the like of the belt 7 driven via the pulley 14 based on the pulse signal.

Specifically, the control device 15 includes a control unit 21, a motor drive circuit 22, a clutch drive circuit 23, a pulse signal input circuit 24, and a remote controller (hereinafter,) connected to a memory 26 used as a storage area or work area for various data. This is also referred to as a "remote controller".) It has an operation command receiving circuit 25 for receiving an operation command from 27.

The control unit 21 controls the entire control device 15 in an integrated manner, and exchanges data with the motor drive circuit 22, the clutch drive circuit 23, the pulse signal input circuit 24, and the operation command reception circuit 25. The control device 15 is activated by the power supply power supplied from the power supply unit 28.

In particular, the control unit 21 drives and controls the electric motor 11 and the electromagnetic clutch 12 by outputting a PWM signal whose duty ratio is adjusted to the motor drive circuit 22 and the clutch drive circuit 23. Here, the motor drive PWM signal output from the control unit 21 to the motor drive circuit 22 and the clutch drive PWM signal output from the control unit 21 to the clutch drive circuit 23 are not the same but different.

The motor drive circuit 22 drives and controls the rotation shaft 11a of the electric motor 11 at a desired rotation speed according to the motor drive PWM signal from the control unit 21. The clutch drive circuit 23 controls the engagement state (engagement or release) between the electric motor 11 and the pulley 14 by driving and controlling the electromagnetic clutch 12 according to the clutch drive PWM signal from the control unit 21.

The pulse signal input circuit 24 inputs the pulse signal received by the optical sensor 13b of the rotation detector 13, and outputs the pulse signal to the control unit 21. The operation command reception circuit 25 receives an open or close command of the curtain from the remote controller 27 as a curtain operation command, and outputs the command to the control unit 21.

The control unit 21 has a microcomputer configuration including a CPU (Central Processing Unit), a ROM, a RAM, an interface, and the like, and is realized by installing a program (software). Various functions as the control unit 21 are realized by the cooperation of various hardware resources of the computer and the computer program.

As shown in FIG. 6, the control unit 21 is configured by software by a computer program, and has a curtain operation command determination unit 31, a motor drive PWM signal generation unit 32, a clutch drive PWM signal generation unit 33, and a curtain position. A detection unit 34 is provided.

The curtain operation command determination unit 31 determines whether the intention of the user who operates the remote controller 27 is an open command or a close command based on the curtain operation command (open command or close command) from the operation command reception circuit 25. Then, the determination result is output to the motor drive PWM signal generation unit 32 and the clutch drive PWM signal generation unit 33.

The motor drive PWM signal generation unit 32 generates and outputs a motor drive PWM signal to be output to the motor drive circuit 22 for driving the electric motor 11. As shown in FIG. 7, the motor drive PWM signal generation unit 32 includes a motor ON waiting time setting unit 321, a motor drive PWM signal output unit 322, and a motor drive duty ratio setting unit 323.

The motor ON waiting time setting unit 321 of the motor drive PWM signal generation unit 32 engages the electric motor 11 and the pulley 14 via the electromagnetic clutch 12 until the electric motor 11 is driven via the motor drive circuit 22. It is a functional part that sets the waiting time of.

The reason for setting the waiting time is that even when the electromagnetic clutch 12 is turned on and the electric motor 11 and the pulley 14 are started to be engaged, the electric motor 11 and the pulley 14 are not engaged instantly. This is because it is necessary to wait for it to be completely concluded.

If the electromagnetic clutch 12 is turned on to drive the electric motor 11 before the fastening between the electric motor 11 and the pulley 14 is completed, the electric motor 11 will slip. In this case, the pulse signal from the pulse signal input circuit 24 is erroneously counted by the curtain position detection unit 34, and the position shift occurs in the detection of the curtain position of the curtain material 3. In order to avoid such a situation, a waiting time is set.

The motor drive PWM signal output unit 322 of the motor drive PWM signal generation unit 32 outputs a motor drive PWM signal to the motor drive circuit 22 based on the duty ratio set by the motor drive duty ratio setting unit 323. It is a functional unit that generates and outputs.

The motor drive duty ratio setting unit 323 of the motor drive PWM signal generation unit 32 sets the duty ratio of the motor drive PWM signal based on the signals supplied from the curtain operation command determination unit 31 and the curtain position detection unit 34. It is a functional unit, and the set duty ratio is output to the motor drive PWM signal output unit 322.

The clutch drive PWM signal generation unit 33 is a functional unit that generates a clutch drive PWM signal for driving the electromagnetic clutch 12 and outputs the clutch drive PWM signal to the clutch drive circuit 23.

As shown in FIG. 8, the clutch drive PWM signal generation unit 33 includes a clutch control time setting unit 331, a clutch drive PWM signal output unit 332, a clutch drive duty ratio setting unit 333, and a clutch control determination unit 334. Have.

As shown in FIG. 9, the clutch control time setting unit 331 of the clutch drive PWM signal generation unit 33 gradually releases the engaged state between the electric motor 11 and the pulley 14 by the electromagnetic clutch 12. It is a functional unit that sets the control time t in.

The clutch drive PWM signal output unit 332 of the clutch drive PWM signal generation unit 33 generates a clutch drive PWM signal based on the duty ratio set by the clutch drive duty ratio setting unit 333, and uses this as a clutch drive circuit. It is a functional unit that outputs to 23.

The clutch drive duty ratio setting unit 333 of the clutch drive PWM signal generation unit 33 has a duty ratio of the clutch drive PWM signal based on the signals supplied from the curtain operation command determination unit 31 and the motor drive PWM signal generation unit 32. It is a functional part to set. The clutch drive PWM signal generation unit 33 outputs the set duty ratio to the clutch drive PWM signal output unit 332.

How the clutch control determination unit 334 of the clutch drive PWM signal generation unit 33 controls the engagement state between the electric motor 11 and the pulley 14 based on the control time t set by the clutch control time setting unit 331. It is a functional unit that discriminates, and outputs a control command according to the discriminant result to the clutch drive duty ratio setting unit 333.

The curtain position detection unit 34 (FIG. 6) of the control unit 21 counts the pulse signal from the pulse signal input circuit 24, thereby integrating the rotation speed (actual measurement value) of the rotation shaft 11a of the electric motor 11 and the belt 7. It is a functional unit that detects the position of the curtain position detection runner 5s moved to, that is, the position on the closed side (direction of arrow a) and the position on the open side of the curtain material 3.

<Operation and effect>
In the above configuration, as shown in FIG. 10, the curtain operation command discriminating unit 31 of the control unit 21 receives a curtain operation command (open command or close command) input via the remote controller 27 from the operation command reception circuit 25. It is received via the operation command determination unit 31 and determines whether or not the curtain operation command is an open command (step sp1).

Here, if a negative result is obtained, it means that it is a closed command, not an open command. At this time, the curtain operation command discriminating unit 31 outputs a closing command to both the motor drive PWM signal generation unit 32 and the clutch drive PWM signal generation unit 33.

In this case, the control unit 21 drives the electromagnetic clutch 12 by the clutch drive PWM signal generated via the clutch drive PWM signal generation unit 33 to fasten the electric motor 11 and the pulley 14, and then the motor drive PWM. By driving the electric motor 11 by the motor driving PWM signal generated via the signal generation unit 32, the curtain material 3 is moved to a predetermined fully closed position and waits until an open command is received.

On the other hand, when the curtain operation command is an open command, an affirmative result is obtained (step sp1: Yes). Therefore, at this time, the curtain operation command determination unit 31 is the motor drive PWM signal generation unit 32 and the clutch drive. Notify the PWM signal generation unit 33 of the open command.

The clutch drive duty ratio setting unit 333 of the clutch drive PWM signal generation unit 33 sets the duty ratio of the clutch drive PWM signal to the electromagnetic clutch 12 as 100% based on the open command. The clutch drive PWM signal output unit 332 of the clutch drive PWM signal generation unit 33 generates a clutch drive PWM signal with a duty ratio of 100% set by the clutch drive duty ratio setting unit 333 to the clutch drive circuit 23. Output. As a result, the clutch drive circuit 23 instantly engages the electric motor 11 and the pulley 14 via the electromagnetic clutch 12 by the clutch drive PWM signal having a duty ratio of 100% (step sp2).

The motor ON waiting time setting unit 321 of the motor drive PWM signal generation unit 32 engages the electric motor 11 and the pulley 14 via the electromagnetic clutch 12 until the electric motor 11 is driven via the motor drive circuit 22. The motor ON waiting time (in this case, for example, 100 [msec]) is set (step sp3).

Then, the motor ON waiting time setting unit 321 determines whether or not the motor ON waiting time (100 [msec]) has elapsed based on the internal clock, and denies it if the motor ON waiting time has not yet elapsed. A result is obtained, and a positive result is obtained when the motor ON waiting time has elapsed (step sp4).

Since the motor ON waiting time has already passed in the motor drive duty ratio setting unit 323 of the motor drive PWM signal generation unit 32, the duty ratio of the motor drive PWM signal output from the motor drive PWM signal output unit 322 is set to 1. It is set to% and output to the motor drive circuit 22 (step sp5).

The motor drive duty ratio setting unit 323 sets the duty ratio at a predetermined ratio (for example, starting from 1%, 10%, 20%, 30) every 10 [msec] until the curtain material 3 reaches a desired moving speed. %, ..., 90%, 100%) and output to the motor drive PWM signal output unit 322. The motor drive PWM signal output unit 322 outputs the motor drive PWM signal whose duty ratio is increased every 10 [msec] to the motor drive circuit 22, so that the electric motor 11 moves the curtain material 3 to a desired moving speed. It can be gradually raised to the position where the curtain rail 2 is fully opened (step sp6).

Here, in the motor drive PWM signal output unit 322 of the motor drive PWM signal generation unit 32, based on the count value of the number of pulses detected by the curtain position detection unit 34 at regular time intervals (for example, 60 [msec]). The calculated rotation speed (actual measurement value) of the rotation shaft 11a of the electric motor 11 is compared with the target rotation speed, and the duty ratio is adjusted by the motor drive duty ratio setting unit 323 according to the comparison result. Thereby, the curtain material 3 can be controlled to a desired moving speed by the electric motor 11.

In the curtain position detection unit 34, the position of the curtain position detection runner 5s, that is, the position on the closed side (arrow a direction) of the curtain material 3 has reached the fully open position based on the count value of the pulse signal from the pulse signal input circuit 24. Whether or not it is determined (step sp7).

If a negative result is obtained here, it means that the position on the closed side (direction of arrow a) of the curtain material 3 has not reached the fully open position, and at this time, the position returns to step SP6 and reaches the fully open position. The above process is repeated until the above process is performed. When the curtain position detection unit 34 detects that the position on the closed side (arrow a direction) of the curtain material 3 has reached the fully open position, the curtain position detection unit 34 notifies the motor drive PWM signal generation unit 32 of a detection signal indicating that fact. do.

When the motor drive duty ratio setting unit 323 of the motor drive PWM signal generation unit 32 receives a notification from the curtain position detection unit 34 that the fully open position has been reached, the motor drive PWM signal is used to stop the electric motor 11. The duty ratio is set to 0%. The motor drive PWM signal output unit 322 stops driving the electric motor 11 by outputting the motor drive PWM signal having a duty ratio of 0% to the motor drive circuit 22 (step sp8).

At this time, since the motor drive PWM signal output unit 322 of the motor drive PWM signal generation unit 32 has stopped driving the electric motor 11, a notification to that effect is output to the clutch drive PWM signal generation unit 33.

The clutch control time setting unit 331 of the clutch drive PWM signal generation unit 33 has a control time t (for example, 50) at each stage when the engaged state of the electric motor 11 and the pulley 14 is gradually released by the electromagnetic clutch 12. [msec]) is set (step sp9).

As shown in FIG. 9, the clutch drive PWM signal output unit 332 generates and outputs a clutch drive PWM signal at the first stage, that is, a clutch drive PWM signal having a duty ratio of 100% by the clutch drive duty ratio setting unit 333 (step sp10). ), It is determined whether or not the control time t (50 [msec]) has elapsed in that state (step sp11).

Here, if the control time t has not elapsed while the clutch drive PWM signal having a duty ratio of 100% is being output, the process returns to step sp10 again and the clutch drive PWM signal is output until the control time t elapses. (Step sp10).

On the other hand, when the clutch control time setting unit 331 determines that the control time t has elapsed while outputting the clutch drive PWM signal having a duty ratio of 100%, the duty ratio of the clutch drive PWM signal is 0%. It is determined whether or not it was (step sp12).

Here, if the duty ratio is not 0%, the process returns to step sp9, and the clutch control time setting unit 331 sets the control time t (for example, 50 [msec]) again.

Then, the clutch drive PWM signal output unit 332 generates and outputs a clutch drive PWM signal in the next step, for example, a duty ratio of 75% (step sp10), and in that state, the control time t (50 [msec]) is set. It is determined whether or not it has passed (step sp11).

In this way, the clutch drive PWM signal generation unit 33 repeats steps sp9 to step sp12, and outputs clutch drive PWM signals having a duty ratio of 50% and a duty ratio of 25% for the control time t, respectively.

After that, when the clutch drive PWM signal output unit 332 finally determines that the duty ratio of the clutch drive PWM signal is 0%, the clutch drive PWM signal output unit 332 outputs the clutch drive PWM signal. To stop and end the process.

As a result, the clutch drive PWM signal generation unit 33 can gradually release the engaged state of the electric motor 11 and the pulley 14 by the electromagnetic clutch 12 over time, instead of instantaneously releasing the engaged state.

Thus, even when the motor control unit 4 moves the curtain material 3 to the fully open position, the elastic force (repulsive force) due to the fabric of the curtain material 3 can be weakened, so that the curtain material 3 can be moved to the fully open position. It is possible to prevent the curtain material 3 from moving in the fully closed direction immediately after being moved to, and it is possible to improve the appearance to the user.

<Other embodiments>
In the above-described embodiment, when the control time t of 50 [msec] elapses while the PWM signal for driving a clutch having a duty ratio of 100% is output, the PWM signal for driving a clutch having a duty ratio of 75% is then transmitted. Outputs only the control time t of 50 [msec], and then outputs the PWM signal for clutch drive for the control time t of 50 [msec] while gradually reducing the duty ratio to 50% and 25% until the duty ratio reaches 0%. I described the case of doing so. However, the present invention is not limited to this, and the duty ratio and the control time t may be arbitrarily set so that the fastening state between the electric motor 11 and the pulley 14 may be released in a finer stepwise manner.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and includes all aspects included in the concept of the present invention and the scope of claims. In addition, each configuration may be selectively combined as appropriate so as to achieve at least a part of the above-mentioned problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above embodiment can be appropriately changed depending on the specific usage mode of the present invention.

1 ... Electric curtain, 2 ... Curtain rail, 3 ... Curtain material, 4 ... Motor control unit, 5 ... Runner, 5s ... Curtain position detection runner, 6 ... Hanging tool, 7 ... Belt, 11 ... Electric motor, 11a ... Rotation Shaft, 12 ... Electromagnetic clutch, 12a ... Output side rotation shaft, 13 ... Rotation detector, 13a ... Slit plate, 13b ... Optical sensor, 14 ... Pulley, 15 ... Control device, 21 ... Control unit, 22 ... Motor drive circuit, 23 ... Clutch drive circuit, 24 ... Pulse signal input circuit, 25 ... Operation command reception circuit, 26 ... Memory, 27 ... Remote controller (remote control), 28 ... Power supply unit, 31 ... Curtain operation command discriminator, 32 ... Motor drive PWM signal generation unit, 33 ... Clutch drive PWM signal generation unit, 34 ... Curtain position detection unit, 321 ... Motor ON waiting time setting unit, 322 ... Motor drive PWM signal output unit, 323 ... Motor drive duty ratio setting Unit, 331 ... Clutch control time setting unit, 332 ... Clutch drive PWM signal output unit, 333 ... Clutch drive duty ratio setting unit, 334 ... Clutch control determination unit, t ... Control time.

Claims (5)

An electric curtain control device that controls the opening and closing of a curtain by rotating a belt along the curtain rail with an electric motor to move a runner.
An open request recognition unit that recognizes the open request of the curtain,
A clutch drive unit that engages the electric motor and the belt by turning on a clutch member that transmits the power of the electric motor to the belt.
After the electric motor and the belt are fastened, the motor drive unit that drives the electric motor to move the runner to execute the opening operation of the curtain, and the motor drive unit.
A detection unit that detects that the curtain has reached the fully open position,
When it is detected that the curtain has reached the fully open position, the motor drive unit stops driving the electric motor, and from that point on, the clutch member engages the electric motor with the belt at predetermined time intervals. An electric curtain control device with a gradually weakening clutch control unit. The control device for an electric curtain according to claim 1, wherein the clutch control unit controls an engagement state between the electric motor and the belt by the clutch member by a PWM signal. The electric curtain control device according to claim 2, wherein the clutch control unit reduces the duty ratio of the PWM signal at predetermined time intervals to finally make the duty ratio 0. The control device for an electric curtain according to claim 2, wherein the motor drive unit drives and controls the electric motor by a PWM signal. It is a control method of an electric curtain that controls the opening and closing of the curtain by rotating the belt along the curtain rail with an electric motor to move the runner.
The open request recognition step of recognizing the open request of the curtain by the open request recognition unit, and
A clutch drive step in which a clutch member that transmits the power of the electric motor to the belt is turned on by a clutch drive unit to fasten the electric motor and the belt.
After the electric motor and the belt are fastened, the motor drive step for executing the opening operation of the curtain by driving the electric motor by the motor drive unit and moving the runner.
A detection step of detecting that the curtain has reached the fully open position by the detection unit, and
When it is detected that the curtain has reached the fully open position, the motor drive unit stops driving the electric motor, and from that point on, the clutch member engages the electric motor with the belt at predetermined time intervals. A control method for an electric curtain having a clutch control step that is controlled to be gradually weakened by a clutch control unit.

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