CN115182676B

CN115182676B - Method for controlling absolute position of curtain by electric motor

Info

Publication number: CN115182676B
Application number: CN202110372334.1A
Authority: CN
Inventors: 梁文颖
Original assignee: Ching Feng Home Fashions Co Ltd
Current assignee: Ching Feng Home Fashions Co Ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2023-10-03
Anticipated expiration: 2041-04-07
Also published as: CN115182676A

Abstract

A method for controlling the absolute position of a curtain by an electric motor is applied to a curtain group, a motor arranged in the curtain group and a control module; the control module is used for controlling the motor to rotate forwards/reversely so as to retract and release the curtain group; the device comprises a motor, a control module, a curtain body, a control module and a control system, wherein the motor is provided with a detection unit which is used for detecting the working current of the motor, when the curtain body is retracted and operated to a curtain body tightening and blocking position, the detection unit can detect the increase of the working current of the motor and generate a signal to the control module for analysis and judgment that the working current reaches an upper limit position, and the control module stops the retraction and operation of the motor and reversely and slightly rotates to slightly lower the curtain body; meanwhile, the control module records the position as an upper limit position; when the curtain body descends, the processing unit reaches the extremely lower limit position according to the calculated rotation number of the motor, so as to control the absolute position of the curtain body of the curtain.

Description

Method for controlling absolute position of curtain by electric motor

Technical Field

The present invention relates to a control method for controlling the elevation of a curtain body of an electric window curtain, and more particularly, to a control method for detecting the absolute elevation or descent position of the curtain body by using a motor control unit, so as to simplify the setting limiting step and reduce errors during production.

Background

The current electric curtain comprises a curtain group, a motor arranged in the curtain group and a control module; the control module is used for controlling the motor to rotate forwards/backwards so as to enable the winder of the curtain group to wind/unwind the pull rope to control the winding and unwinding of the curtain body.

Because the electric curtains of standard size are mass produced, when assembling, the assembler sets the ascending or descending length of the curtain body according to the length of the curtain body, generally, the setting of the motor control module or the selection of the limit switch is adopted, the limit mode is quite complex and requires manual operation judgment, and the setting operation is quite inconvenient and easy to cause defective products due to errors.

How to improve the defects of the prior control method is a problem which is positively solved by related operators.

Disclosure of Invention

In order to solve the above-mentioned shortcomings in the prior art, a main object of the present invention is to provide a method for controlling an absolute position of a window curtain by an electric motor, which is applied to a window curtain set, a motor disposed inside the window curtain set, and a control module; the control module is used for controlling the motor to rotate forwards/backwards so as to enable a winder of the curtain group to wind/unwind a pull rope to achieve the control of winding and unwinding a curtain body of the curtain group; the motor is provided with a detection unit which is used for detecting the working current of the motor, the working current changes according to the load condition of the motor, when the curtain body is retracted and operated to the curtain body tightening and blocking position, the load of the motor is increased in the state, the detection unit detects the increase of the working current of the motor, the detection unit generates a signal to a processing unit of a control module for analysis and judgment, the control module stops the retraction and operation of the motor, and the curtain body slightly descends due to reverse micro rotation; meanwhile, the control module records the position as an upper limit position; the extremely lower limit position is set according to the fact that the curtain body is vertically longer than the motor in the motor assembly process, the number of turns required by the motor to run is set in the control module, and when the curtain body of the curtain descends, the processing unit calculates the number of turns of the motor according to the vertical length of the curtain body so as to reach the extremely lower limit position, and the absolute position of the curtain body of the curtain is controlled.

In the embodiment of the invention, when the curtain body is retracted to the curtain body tightening and blocking position, the working current at the moment is between 0.5 and 2 amperes.

In an embodiment of the invention, wherein the motor is reversed after the curtain has reached an upper limit position such that the curtain descends slightly, the descending length being between 3 and 20 millimeters (mm).

In the embodiment of the invention, the curtain body can set different running turns of the motor according to the actual vertical length.

By the control method, the upper limit position of the electric curtain is set by detecting the working current of the curtain body when the detecting unit detects the curtain body, and the motor has set the running circle number of the motor in the control module as the absolute lower limit position of the motor, so that the setting limiting step is simplified and errors are reduced when the electric curtain is produced.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description.

Fig. 1: schematic representation of the present invention reaching an upper limit position;

fig. 2: schematic diagram of the invention reaching the extreme lower limit position;

fig. 3: the invention controls the flow chart.

Description of the reference numerals

100 curtain group

11 upper beam

12 lower beam

13 curtain body

21 motor

22 drive shaft rod

23 coil winder

24 detection unit

30 pull rope

40 control module

41 processing unit

50 remote controller

Aupper limit position

And B, the limit position.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1 to 2, the method for controlling the absolute position of a window curtain by using an electric motor according to the present invention is applied to a window curtain set as follows: the motorized window treatment includes a window treatment assembly 100.

As shown in fig. 1 and 2, the curtain assembly 100 is a motorized window treatment, and the curtain assembly 100 includes an upper beam 11, a lower beam 12, and a curtain body 13 disposed between the upper beam 11 and the lower beam 12; in fig. 1 and 2, the body 13 is a blind, but is not limited to use in actual use.

As shown in fig. 1, the lower beam 12 is provided with a motor 21, a driving shaft rod 22, and a winder 23, wherein the winder 23 is provided with a pulling rope 30 for controlling the elevation of the curtain body 13. The motor 21 is controlled by a control module 40, and the control module 40 is installed inside the motor 21. The control module 40 includes a Micro Controller Unit (MCU) and cooperates with a radio control chip to achieve the purpose of wireless remote control, more specifically, the control module 40 includes a plurality of micro chips mounted inside the motor 21, so that the motor 21 is miniaturized and space and weight are saved. As shown in fig. 1 and 3, in order to meet the requirement of convenience in operation, the control module 40 is controlled to be lifted by a remote controller 50.

The motor 21 is further connected with a detecting unit 24, the detecting unit 24 can select a hall current sensor or a non-contact current sensor, the detecting unit 24 is used for detecting the working current of the motor 21, and when the motor 21 is in normal operation, the working current is between 0.1 and 1 ampere, so that the curtain body 13 can be rolled up or released downwards; the detecting unit 24 is also a microchip, which is disposed inside the motor 21 to miniaturize the motor 21, thereby saving space and weight.

As shown in fig. 1 to 3, when an operator can control the control module 40 through the remote controller 50 to start the upward rolling of the curtain body 13, and the curtain body 13 is rolled up to a position where the curtain body 13 is tightly blocked (i.e. fig. 1), in this state, the load of the motor 21 is increased, the detecting unit 24 detects the increase of the working current of the motor 21 (the working current is increased to 0.5 to 2 amperes according to the type of the motor 21), the detecting unit 24 generates a signal to a processing unit 41 of the control module 40 to analyze and determine that the upper limit position a is reached, the control module 40 stops the rolling operation of the motor 21, and reversely rotates slightly to slightly lower the curtain body 13 by 3 to 20 millimeters (mm), the purpose of lowering is to prevent the curtain group from being kept in a tight state to cause the curtain or the motor 21 to be damaged, and the control module 40 records that this position is the upper limit position a.

As shown in fig. 2, the control module 40 sets the number of motor turns according to the vertical length of the curtain body during the motor assembly process, and the processing unit 41 calculates the number of turns of the motor 21 when the curtain body descends so as to reach the extreme lower limit B, thereby achieving the control of the absolute position of the curtain body 13 of the curtain.

By the control method, the upper limit position A is set by detecting the working current of the curtain body 13 when the curtain body is lifted by the detection unit 24, and then the number of running circles is set as the absolute lower limit position B in the motor assembly process according to the vertical length requirement of the product, so that the setting limit step is simplified and the errors are reduced in the production process.

In some embodiments, because the position requirement of each consumer for the curtain body 13 is different, the remote controller 50 can further set the range of the curtain body 13 for retraction and lowering, but the range is between the upper limit position a and the lower limit position B, so that the user can easily operate the curtain assembly 100 and the motor 21 without damaging.

From the above description, the advantages of the present invention are as follows:

1. in the invention, the working current of the detection motor 21 is used for judging whether the curtain body 13 reaches the upper limit position A, compared with the prior art, the invention does not need to additionally install a redundant limit switch or arrange complex programming language, and is easier for assembly personnel in assembly.

2. The extreme lower limit B is controlled by the number of turns of the motor 21, can accurately reach a designated position and shields external sunlight.

The foregoing description is only of the preferred embodiments of the invention, and it is apparent that the embodiments described are merely some, but not all, of the embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Claims

1. The method for controlling the absolute position of the curtain by the electric motor is characterized by being applied to a curtain group, a motor arranged in the curtain group and a control module; the control module is used for controlling the motor to rotate forwards or reversely so as to enable a winder of the curtain group to wind or unwind a pull rope to control the winding and unwinding of a curtain body of the curtain group; the motor is provided with a detection unit, the detection unit is used for detecting the working current of the motor, the working current changes according to the load condition of the motor, when the curtain body is retracted and operated to the curtain body tightening and blocking position, the motor load is increased in the state, the detection unit can detect the increase of the working current of the motor, the detection unit generates a signal to the processing unit of the control module to analyze and judge that the upper limit position is reached, the control module stops the upward retraction and operation of the motor, and reversely and slightly rotates to enable the curtain body to slightly descend, and meanwhile, the control module records that the position is the upper limit position; the extremely lower limit position is set according to the fact that the curtain body is vertically longer than the motor group in the process of setting, the number of turns of the motor required to run is set in the control module, and when the curtain body of the curtain descends, the processing unit calculates the number of turns of the motor according to the vertical length of the curtain body so as to reach the extremely lower limit position, so that the absolute position of the curtain body of the curtain is controlled.

2. The method of controlling the absolute position of a window covering by an electric motor according to claim 1, wherein the operating current is between 0.5 ampere and 2 ampere when the window covering is retracted to the closed position.

3. A method of controlling the absolute position of a window covering by means of an electric motor according to claim 1, characterized in that the motor is reversed after the curtain has reached the upper limit position so that the curtain is lowered slightly by a length of between 3 mm and 20 mm.

4. The method of controlling an absolute position of a window covering by an electric motor according to claim 1, wherein a vertical length of the window covering is set to a different number of turns of the motor according to an actual vertical length.