DE202009008418U1 - Control system for an electric motor of an actuator for a blind or the like. - Google Patents

Abstract

A control system (40) for an electric motor (20) of an actuator (12) for a venetian blind comprising a panel (11) of horizontal slats (11a, 11k, 11z) or the like, the control system comprising:
A command receiver (22) for receiving instructions for raising or lowering the slat field, the commands being transmitted to the motor,
A limit switch (28) activated by action of the louver field when the field is in a fully raised position,
characterized in that activation of the limit switch during the execution of a control command for shutting down or extending the slat field, a device (41) for interrupting the motor power supply is activated.

Description

The The invention relates to a control system of an electric motor an actuator for a blind or the like, as well as such an actuator, which comprises such a control system.

A Venetian blind includes a box of horizontal slats attached to strings in the form of a ladder are suspended while the last slat at the lower end of the field with drawstrings connected is. The suspension cords are with help adjustable by tilting devices while the drawstrings can be rolled up with the help of retractors, which are each in a horizontal box, the upper End of the device is arranged. The retractors are driven by an actuator, which is also located in the horizontal box.

The Actuator comprises an electric motor, a Command Recipient Commands to Boot or Shut Down of the slat field, and a control unit, Supply of the engine according to received commands and sensors controls.

In the shut down position will be all slats from the suspension cords held.

at a command to start the field become the drawstrings rolled up on the retractors, causing the startup of the last slat leads. During the startup movement comes the last lamella with the immediately above it Slat in contact, thus keeping its weight while the hanging cords relax at this point. Then the whole thing comes with the immediately above it Slat in contact and so on. If the engine in the The direction of the startup remains in operation, it comes to the Instant in which all the slats of the field on the last lamella are stacked on top of each other. The like piled, topmost slat abuts the box.

The actuators in the prior art comprise - as in patent EP 0 951 745 described - a device for interrupting the power supply of the engine (reference numeral 17 and 19 in this document) when the upper fin contacts and exerts sufficient pressure on the interruption device.

Consequently serves the interruption device as the upper end stop. by virtue of This device works only during this arrangement of booting, because it is important that the blind again Shut down after fully hoisted has been.

For the lower end stop will have a different arrangement with the actuators used in the prior art. It is a mechanical one or electronic counting device or, more rarely, one Delay device that automatically stops the machine Motors allowed if the slat field shut down sufficiently has been.

This can cause problems when the drawstrings are shorter than the extent of extension, that by the original setting of the counting device has been released.

In In this case, starting from an initially started up Slat field, a shutdown by normal extension of the field to the point where the drawstrings are completely rolled out or settled. From this moment, the drawstrings wrap in the opposite direction and the last slat moves in the reverse direction of the controlled movement back up. The Movement takes place until the pull cords are completely rolled up. The movement then stops by stopping the engine, the interruption device in the case of the shutdown command is not active, which is in In this case, in a second phase by raising the blind is expressed. If the switch with a motor torque indicator equipped, the movement can be stopped before the mechanical stress becomes too great.

But even if it does not damage the slat field or the cords come, the engine can not move in the opposite direction drive on, as this requires a boot command, which not possible by activating the interruption device is.

It So there is a need, the actuator for To improve blinds to make these extreme cases flawed To prevent use.

The object of this invention is to provide a control system which overcomes the above-mentioned disadvantages and improves the known functional methods of the control systems and the control systems. In particular, with the invention, a simple control system can be realized, which helps avoid the damage or damage of a blind by fully starting the blind after lowering the blind, these operations due to unfavorable configuration of the actuator and / or the blind after the command of lowering down can. The invention also provides a control system with which blocking of the blind in the raised position after the phenomenon described above can be avoided. The invention thus relates to an actuating device with such a control system.

• – einen Befehlsempfänger zur Entgegennahme von Steuerbefehlen zum Hochfahren oder Herunterfahren des Lamellenfeldes, wobei die Befehle an den Motor übermittelt werden,
• – einen Endschalter (Unterbrecher), der durch eine Aktion des Lamellenfeldes aktiviert wird, wenn sich das Feld in einer vollständig hochgefahrenen Position befindet.

According to the invention, the control system for an electric motor of an actuator for a blind with a field of horizontal slats or the like comprises the following:

• A command receiver for accepting control commands for raising or lowering the slat field, the commands being transmitted to the motor,
• - a limit switch (interrupter) activated by an action of the slat field when the field is in a fully raised position.

The System is characterized in that an activation of the limit switch while executing a control command to Shutting down or extending the slat field a breaker activated for the motor power supply.

The System may include a device for releasing the power of the Motors have in a second direction of rotation, wherein the release device is activated or can be activated when the limit switch is activated while the motor has been powered, to turn in a first direction.

The System can be a device for automatic power supply of the Motors in a second direction of rotation, wherein the device for automatic power supply is activated or activated is when the limit switch has been activated during the Motor was powered to move in a first direction rotate.

The System can be a device of automatic inversion of the context or the relationship between the control commands for booting up and Shutting down the slat field and the directions of rotation of the motor have, wherein the device of the automatic inversion after Activation of the limit switch during execution a command to shut down or extend the field is activated or can be activated.

The System may include means for transmitting an information signal wherein the means for transmitting an information signal after activating the limit switch during execution a command to shut down or extend the field is activated or can be activated.

A Actuator according to the invention comprises a control system as described above.

• – einen Befehlsempfänger zur Entgegennahme von Befehlen zum Hochziehen oder Herunterlassen des Lamellenfeldes, wobei die Befehle an den Motor übermittelt werden,
• – einen Endschalter, der durch eine Aktion des Lamellenfeldes aktiviert wird, wenn sich das Feld in einer vollständig hochgefahrenen Position befindet.

The control system according to the invention is suitable for carrying out the method described below. The method controls the operation of the control system for an electric motor of a blind actuator provided with a panel of horizontal slats, or the like, the control system comprising:

• A command receiver for receiving commands for raising or lowering the slat field, the commands being transmitted to the motor,
• - a limit switch activated by an action of the slat field when the field is in a fully raised position.

at the execution of a shutdown control command or Extending the field is by activating the limit switch the motor power supply is interrupted.

The Procedure may include a step of releasing the power of the Motors in a second direction of rotation after the limit switch is activated while the motor has been powered, to turn in a first direction.

The Procedure can be an automatic step of powering the Motors in a second direction of rotation after the limit switch is activated while the motor has been powered, to turn in a first direction.

The Procedure can be a step of automatic inversion of the context or the relationship between the control commands for booting up and Shutting down the slat field and the directions of rotation of the motor include, after activation of the limit switch during the execution of a shutdown control command or Extending the field.

The Procedure may be after activation of the limit switch during the execution of a shutdown control command or Extending the field a step of sending an information signal include.

The invention will become apparent from the following description, which is merely exemplary more clear. Reference is made to the accompanying drawings which show:

1 shows a blind with slats and a control system according to the invention;

2 shows the principle of the functional method of a control system according to the invention;

3 shows a first embodiment of the functional method for a control system according to the invention;

4 shows an example of an initialization step that can be performed in the first embodiment of the method;

5 shows a second embodiment of a method of operation of a control system according to the invention.

1 shows in schematic form in a vertical plane a blind 10 with slats, in particular adjustable slats, which is equipped with an actuating device, in which the inventive method is used.

The blind includes a box 11 in which an upper slat with 11a , an intermediate plate with 11k and a lower, weighted lamella, which serves as a load bar for the field, with 11z is designated. The blind comprises an actuating device 12 in a box 13 is arranged, which is open at its bottom. The actuator is with a shaft 14 connected, which is driven by the actuator. On the shaft a plurality of retractors are arranged. The retractor 15 is with a drawstring 16 connected, which rolls up depending on the direction of rotation of the shaft on the retractor or unrolls from the retractor. The drawstring is at the last lamella via a fastening 16z attached.

A tilting device 17 is connected to the shaft and the box at the same time. The tilting device holds a suspension cord 18 in the form of a ladder carrying the slats of the field. The ladder holds the weight of all louvers when the field is unfolded or shut down. An inclination of the tilting device is caused by rotating the shaft. This inclination is transferred by moving the suspension cord to the entirety of the slats. The suspension cord is over a second attachment 18z attached to the last lamella.

The actuating device 12 includes in particular an electric motor 20 and a control system 40 for the engine. The control system has a control unit 21 , a command receiver 22 , for example, a high-frequency command receiver, and an upper limit switch 28 which is also designated K. The actuating device 12 is via electrical lines 23 powered.

Farther For example, the command receiver may be an infrared command receiver or a carrier stream command receiver or the command receiver may be a control command identifier according to the state of the electric wires for power supply having the actuating device. The command receiver allows in particular the receipt of a command to start up (UP) and a Command for shutdown (DN) of the blind.

About a connection 24 the control unit becomes the engine 20 Powered in a first direction or in a second direction, depending on the type of command, as will be seen below. Via a mechanical connection 25 on the engine is the shaft 14 driven. A rotation sensor 26 is connected to an input on the control unit to allow counting of the shaft rotation and interruption of the motor power supply when the unwinding of the pull cord reaches a predetermined value. The value of the lower end position is called EOT.

The control unit in particular comprises a memory area 27 for storing the data of the count and for detecting a move command. The upper limit switch 28 is over a state line 29 connected to the control unit. The limit switch is activated by an action during the complete start-up of the slat field - for example by pressure, through the field and in particular the upper slat 11a is exercised - activated.

Each command to move is assigned a direction of rotation of the motor. In the storage zone 27 is the relationship between the movement commands (UP, DN) with the first direction of rotation of the motor (S1) and the second direction of rotation of the motor (S2) deposited.

This Context can be in a first form as follows write: S1 if UP and S2 if DN, or alternatively in a second Form: S2 if UP and S1 if DN. The two forms behave inversely to each other. In a learning process it is determined which Connection is used by the actuator.

The control system includes hardware and / or software devices that govern its operation, ie, by means of which the functional method can be carried out. The software devices may include computer programs.

The control unit 21 has a device 41 for interrupting the power supply of the motor and / or a device 42 for releasing the power of the motor in a second direction and / or a device 43 for automatically powering the motor in a second direction and / or a device 44 to automatically reverse the relationship between the commands to start and shut down the slat field and the directions of rotation of the motor. The control unit also includes a device for detecting the direction of rotation of the motor.

2 shows in the form of a general flow chart, the control method of the actuator.

In a first general step E1 is checked whether the upper limit switch is activated while the actuator executes a start-up (UP) command. In this case the motor is not or no longer supplied with power.

In a second general step E2, it is checked whether the upper limit switch is activated while the actuator is executing a shutdown command (DN). In this case, the motor is not or no longer supplied with power. This is done by activating the interruption device 41 allows the power supply to be interrupted.

Of course, a situation of blocking must be avoided in which no single command is executed. The control method comprises a third general step E3, in which a UP command is enabled when in the previous case of activation of the upper limit switch, while the operating device has executed a shutdown command. This is done by activating the device 42 allows the motor power supply in a second direction releases.

In a variant, the third general step E3 simply comprises a motor power supply in the opposite direction, for example for a few seconds, to release the upper limit switch. This is done by activating the device 43 which automatically powers the motor in a second direction.

3 shows a first embodiment of the method in which a systematic release of a movement opposite to the last ongoing movement is performed.

In a first step E10 identifies the command receiver a CD movement command, in particular a boot command (UP) (raising the blind), or a shutdown command (DN) (lowering the blind).

If no new command is detected, you go directly through this first Step.

In a second step E12, the state of the upper limit switch K is read by reading the state line 29 checked. If the limit switch is activated, a third step E13 is then proceeded in which it is checked whether the current command CD is identical to the previously executed command. This previously executed instruction was stored in a memory MEM of the memory area 27 stored and is denoted by (MEM). If so, proceed to the fourth step E14, in which the motor power supply is interrupted to bring it to a standstill. The method is thus looped with the first step.

If it is determined in step E12 that the limit switch K is not activated, it goes to the fifth step E15, in which the movement command is stored in the memory MEM, and then to a sixth step E16, at which the movement command is executed, by supplying power to the motor so that its direction of rotation corresponds to the movement command. During a seventh step E17, the determination of the end position by the rotation sensor 26 to a stop of the motor power supply.

The The method is thus looped with the first step.

The flowchart of 3 illustrates that by learning a first direction of rotation of the motor is detected, which corresponds to a command UP (UP), and a second direction of rotation of the motor, which corresponds to a command for shutdown (DN). This is a simplification since there is no stop command (STP) for the command receiver. Such a command can be taken into account with devices known from the prior art, in particular during the sixth step E16.

In addition, the method comprises an initialization step E11, which in 4 is shown.

In This step is the memory MEM during a very first Command for movement after installation of the blind an initial content assigned. This content is opposite to the received motion command.

So suppose that the lamella lenfeld after installation is in a fully raised position and that the actuator receives a shutdown command DN. The memory MEM takes over during the step E11 the content (MEM) = UP. It goes from E12 to E13, then from E13 to E15, because the command to move CD is not equal to UP. The command DN is thus stored in the memory MEM and executed. If it turns out that the lower end position EOT is set poorly, and in particular corresponds to a distance which is greater than the entire unwound length of the pull cord, then the last slat is then pulled up again. The process is then looped in the sequence of steps E10-E12-E15-E16-E17 until the moment when the upper limit switch K is activated, which then leads to step E13. During the test of this step, an instruction for movement CD corresponds to the content DN of the memory MEM. This leads to the transition to the fourth step E14.

Of the Limit switch K thus calls the standstill of the motor power supply when it is activated, if it is the current command is a shutdown DN command.

5 describes in the form of a single step E20 a second embodiment of the control method.

• – entweder das Aussenden eines Signals,
• – oder eine Umkehrung des Zusammenhangs zwischen den Befehlen zur Bewegung und den Drehrichtungen des Motors.

During the single step, it is checked if the upper limit switch K is activated during the execution of a shutdown command DN. If so, the motor power supply is interrupted as described in the general step E2. However, this interruption follows:

• Either the transmission of a signal,
• Or a reversal of the relationship between the commands to move and the directions of rotation of the motor.

The Sending a signal can be sensory to the user and Indicate that there is a problem. In a sensory Signal can be an audible or visual Act signal. A visual signal can simply be that the shift of the load bar down to one before fixed value, for example, 10 cm, or for example 5 seconds, which has the advantage that the upper limit switch is released. One finds here again a third general Step E3 analogue operation.

It can also be a high-frequency signal to a control interface be sent near the user, for example is provided with an indicator indicating the nature of the error.

An automatic reversal of the relationship connecting the two commands to the movement (UP, DN) and the two directions of rotation of the motor (S1, S2) is a preferred embodiment because it enables it to be done immediately after the sequence of events due to the bad setting the device of the lower limit position EOT to restore a situation in which the directions of movement again correspond to the received commands. This is done by activating the device 44 possible, which automatically reverses the relationship that connects the control commands of startup and shutdown of the slat field and the directions of rotation of the motor.

advantageously, is it possible to send a signal and automatic Inversion of the relationship or relation to combine.

The automatic inversion of the context can be performed by placing a pointer in the memory area 27 changed, or by any other software element.

The entire method is described in the form of flowcharts, the for example, be created by programming a microcontroller, however, one skilled in the art may do the same thing by using wired logic circuits or relays.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0951745 [0006]

Claims (6)

Control system ( 40 ) for an electric motor ( 20 ) an actuating device ( 12 ) for a blind with a field ( 11 ) of horizontal slats ( 11a . 11k . 11z ) or the like, the control system comprising: - a command receiver ( 22 ) for receiving commands for raising or lowering the slat field, whereby the commands are transmitted to the motor, - a limit switch ( 28 ) activated by an action of the louver field when the field is in a fully raised position, characterized in that by activation of the limit switch during the execution of a control command for shutting down or extending the louver field, a device ( 41 ) is activated to interrupt the motor power supply. Control system according to claim 1, characterized in that it comprises a device ( 42 ) for releasing power to the motor in a second direction of rotation of the motor, wherein the enabling device is activated when the limit switch has been activated while the motor has been energized to rotate in a first direction. Control system according to claim 1 or 2, characterized in that it comprises a device ( 43 ) for automatically energizing the motor in a second direction of rotation, wherein the automatic power supply device is activated when the limit switch has been activated while the motor has been energized to rotate in a first direction. Control system according to claim 1, characterized in that it comprises a device ( 44 ) for automatically reversing the relationship between the control commands for raising and lowering the slat field and the directions of rotation of the motor, wherein the device for automatic inversion after activation of the limit switch is activated during the execution of a control command for shutting down or extending the slat field. Control system according to one of Claims 1 to 4, characterized in that it comprises a device ( 22 ) for transmitting an information signal, wherein the device for transmitting an information signal after activation of the limit switch during the execution of a control command for shutting down or extending the slat field is activated. Actuating device ( 12 ) for a blind with a control system ( 40 ) according to one of claims 1 to 5 and an electric motor ( 20 ).