Tubular electromechanical resistance bounce control circuit
By introducing an obstacle detection and filtering circuit into the tubular motor, and using diodes and optocouplers for signal rectification and filtering, the signal transmission interference problem is solved, achieving more stable and accurate obstacle detection, and improving control precision and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANGZHOU HENGYUAN ELECTRONIC TECH CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-23
Smart Images
Figure CN224401326U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of fuse production equipment, and in particular to a tubular motor mechanical resistance rebound control circuit. Background Technology
[0002] Roller shutters are suitable for commercial shops, garages, shopping malls, and other places, and are convenient and quick to use. Roller shutters are usually driven by a motor to rotate the central shaft of the shutter, which achieves the raising and lowering of the shutter. When the rotation reaches the top or bottom limit set by the motor, it will automatically stop. However, in actual use, when the roller shutter is lowering, the bottom of the roller shutter is prone to encountering obstacles. For example, if the roller shutter is blocked by a car, the bottom of the roller shutter will be blocked. If the motor continues to rotate at this time, it can easily cause the roller shutter to twist and deform. In severe cases, the roller shutter may crush the obstructing object. To address this, tubular motors with obstruction detection features have appeared on the market. These motors have a stop block on their central shaft and a microswitch on the motor's circuit board. As the roller shutter moves downwards, the door panels accumulate under pressure. When the panels reach a certain size, they exert a reaction force on the motor, causing it to reverse at an angle. This contacts the stop block with the microswitch, triggering a stop signal from the circuit board. The tubular motor then stops. Once the obstruction is removed, the microswitch automatically resets. This obstruction-detection stop device significantly improves the safety of the roller shutter and is very convenient to use. However, this circuit directly sends the microswitch's trigger signal to the circuit board without signal processing, potentially leading to misjudgments and incorrect stopping or starting. Furthermore, the direct electrical connection to the processor on the circuit board can cause interference and errors, as illustrated in patent document CN104775744A. Utility Model Content
[0003] To address the aforementioned problems, the purpose of this invention is to provide a control circuit for mechanical resistance and rebound of a tubular motor.
[0004] This utility model is implemented using the following method: a tubular motor mechanical obstacle detection and rebound control circuit, including a circuit board and a motor. The circuit board is provided with a main control module, a power supply module, and a motor drive module. The motor drive module includes a motor interface. A contact block is provided on the central shaft of the motor. A micro switch that cooperates with the contact block is provided on the circuit board. The motor interface outputs a trigger signal for the micro switch. The power supply module supplies power to the motor, the main control module, and the motor drive module. It also includes an obstacle detection and filtering circuit. The obstacle detection and filtering circuit includes a diode D1 and an optocoupler OP1. The positive terminal of the diode D1 is connected to the trigger signal output by the motor interface. The negative terminal of the diode D1 is connected to the input terminal of the optocoupler OP1 via an RC filter circuit. The collector of the output terminal of the optocoupler OP1 is connected to the output terminal of the power supply module through a pull-up resistor R4. The collector of the output terminal of the optocoupler OP1 is connected to the signal input terminal of the main control module. The emitter of the output terminal of the optocoupler OP1 is grounded.
[0005] Preferably, the RC filter circuit includes a resistor R3 and a polarized capacitor EC2. The positive terminal of the polarized capacitor EC2 and one end of the resistor R3 are connected to the negative terminal of the diode D1. The negative terminal of the polarized capacitor EC2 is connected to the second pin of the input terminal of the optocoupler OP1. The other end of the resistor R3 is connected to the first pin of the input terminal of the optocoupler OP1.
[0006] Preferably, a capacitor C2 is also provided, one end of which is connected to the collector of the output terminal of the optocoupler OP1, and the other end of which is grounded.
[0007] Preferably, the negative terminal of the polarized capacitor EC2 shares a common ground with the eighth pin of the motor interface.
[0008] Preferably, a resistor R2 is also provided, and the positive terminal of the diode D1 is connected to the trigger signal output port of the motor interface.
[0009] Preferably, the motor interface has eight pins, and the trigger signal is output from the third pin of the motor interface, which is connected to the resistor R2.
[0010] Preferably, a status indicator module is also provided, which includes a resistor R5 and an LED 1. One end of the resistor R5 is connected to the LED pin of the main control module, and the other end of the resistor R5 is connected to the positive terminal of the LED 1. The negative terminal of the LED 1 is grounded.
[0011] Preferably, the fourteenth pin of the main control module is a signal input terminal, and the seventh pin of the main control module is an LED pin connected to the resistor R5.
[0012] The beneficial effects of this utility model are as follows: This utility model provides a tubular motor mechanical obstacle detection and rebound control circuit. Compared with the prior art, this utility model has at least the following technical effects: 1. Electrical isolation is achieved using optocoupler OP1, avoiding direct interference, solving the interference error problem of direct signal transmission, reducing misjudgment, and improving the stability and accuracy of obstacle detection signal transmission; the trigger signal output by diode D1 from the rectifier motor interface converts the AC signal into a unidirectional DC square wave. The RC filter circuit further processes the rectified and filtered signal, playing a role in signal matching, ensuring that the signal can be input to optocoupler OP1 in a suitable form, providing stable input for optocoupler, optimizing signal quality, avoiding misjudgment caused by unprocessed signals, and enhancing the reliability of obstacle detection; the pull-up resistor R4 pulls the level of the TO_SIG signal high to +5V. When optocoupler OP1 outputs a low level, it can ensure that the TO_SIG terminal (collector of the output terminal of optocoupler OP1) of optocoupler OP1 has a clear low-level signal; when optocoupler OP1 is not conducting, it makes TO_SIG 1. The output terminal is in a high-level state, providing a stable and reliable signal level reference for the subsequent circuit, ensuring a clear logic level (high / low) for the optocoupler output, providing a reliable signal for the main control module, improving control accuracy, and avoiding malfunctions caused by unstable levels. 2. The polarized capacitor EC2 can filter out high-frequency noise in the rectified DC signal, making the output DC signal smoother and more stable; on the other hand, it plays a certain energy storage role in the circuit. When there is a momentary change in current demand in the circuit, it can release or absorb charge to maintain the relative stability of the circuit voltage; resistor R3 and capacitor EC2 form an RC circuit, which further processes the rectified and filtered signal, playing a signal matching role, ensuring that the signal can be input to optocoupler OP1 in a suitable form; at the same time, it also has a current limiting function, protecting the input side of optocoupler OP1 from damage by excessive current. 3. The collector of the optocoupler OP1 output terminal is connected to capacitor C2 to further filter out high-frequency interference signals in the optocoupler output signal, making the obstruction signal output to the subsequent circuit (connected to the TO_SIG terminal) purer, avoiding misjudgment of subsequent signal processing by high-frequency noise. 4. The negative terminal of polarized capacitor EC2 is directly connected to the GND pin of the motor interface (e.g., pin 8) to form a unified reference ground and avoid potential differences. 5. Resistor R2 limits current, protecting diode D1 and the preceding signal source from overcurrent damage, extending component life, and improving circuit stability. Attached Figure Description
[0013] Figure 1 This is a block diagram illustrating the control principle of a tubular motor mechanical resistance-rebound control circuit according to this utility model.
[0014] Figure 2 This is the circuit schematic diagram of the power module of this utility model.
[0015] Figure 3 This is the circuit diagram of the motor drive module of this utility model.
[0016] Figure 4 This is a schematic diagram of the motor interface of this utility model.
[0017] Figure 5 This is the circuit diagram of the obstacle detection filter circuit of this utility model.
[0018] Figure 6 This is the circuit schematic diagram of the main control module of this utility model.
[0019] Figure 7 This is a schematic diagram of the status indication module of this utility model.
[0020] Figure 8 This is a schematic diagram of the wireless remote control module of this utility model.
[0021] Figure 9 This is a schematic diagram of the button operation module of this utility model.
[0022] The following are the symbol labels: 1. Motor; 2. Main control module; 3. Power supply module; 4. Motor drive module; 5. Obstacle detection and filtering circuit; 6. Status indicator module; 7. Wireless remote control module; 8. Button operation module. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0024] Please see Figures 1 to 9A mechanical obstacle detection and rebound control circuit for a tubular motor 1 includes a circuit board and a motor 1. The circuit board is equipped with a main control module 2, a power supply module 3, and a motor drive module 4. The motor drive module 4 includes a motor 1 interface. A contact block is provided on the central shaft of the motor 1. A micro switch that cooperates with the contact block is provided on the circuit board. The trigger signal of the micro switch is output from the motor 1 interface. The power supply module 3 supplies power to the motor 1, the main control module 2, and the motor drive module 4. The circuit also includes an obstacle detection and filtering circuit 5. The obstacle detection and filtering circuit 5 includes a diode D1 and an optocoupler OP1. The positive terminal of the diode D1 is connected to the trigger signal output from the motor 1 interface. The negative terminal of the diode D1 is connected to the input terminal of the optocoupler OP1 via an RC filter circuit. The collector of the output terminal of the optocoupler OP1 is connected to the output terminal of the power supply module 3 through a pull-up resistor R4. The collector of the output terminal of the optocoupler OP1 is connected to the signal input terminal of the main control module 2. The emitter of the output terminal of the optocoupler OP1 is grounded. Optocoupler OP1 is used to achieve electrical isolation, avoiding direct interference and solving the interference error problem of direct signal transmission, reducing false judgments and improving the stability and accuracy of obstacle detection signal transmission. Diode D1, the trigger signal output from the rectifier motor 1 interface, converts the AC signal into a unidirectional DC square wave. The RC filter circuit further processes the rectified and filtered signal, playing a signal matching role, ensuring that the signal can be input to optocoupler OP1 in an appropriate form, providing stable input for the optocoupler, optimizing signal quality, avoiding false judgments caused by unprocessed signals, and enhancing the reliability of obstacle detection. Pull-up resistor R4 pulls the TO_SIG signal level high to +5V. When optocoupler OP1 outputs a low level, it ensures a clear low-level signal at the TO_SIG terminal (collector of optocoupler OP1 output); when optocoupler OP1 is not conducting, it makes TO_SIG... When the terminal is in a high-level state, it provides a stable and reliable signal level reference for the subsequent circuits, ensuring that the optocoupler outputs a clear logic level (high / low), providing a reliable signal for the main control module 2, improving control accuracy, and avoiding malfunctions caused by unstable levels.
[0025] Please see Figures 1 to 6Preferably, the RC filter circuit includes a resistor R3 and a polarized capacitor EC2. The positive terminal of the polarized capacitor EC2 and one end of the resistor R3 are connected to the negative terminal of the diode D1. The negative terminal of the polarized capacitor EC2 is connected to the second pin of the input terminal of the optocoupler OP1. The other end of the resistor R3 is connected to the first pin of the input terminal of the optocoupler OP1. The polarized capacitor EC2 can filter out high-frequency noise in the rectified DC signal, making the output DC signal smoother and more stable. On the other hand, it plays a certain role in energy storage in the circuit. When there is a momentary change in current demand in the circuit, it can release or absorb charge to maintain the relative stability of the circuit voltage. The resistor R3 and the capacitor EC2 form an RC circuit, which further processes the signal after rectification and filtering, and plays a role in signal matching to ensure that the signal can be input to the optocoupler OP1 in a suitable form. At the same time, it also has a current limiting function to protect the input side of the optocoupler OP1 from damage by excessive current.
[0026] Please see Figures 1 to 6 Preferably, a capacitor C2 is also provided. One end of the capacitor C2 is connected to the collector of the output terminal of the optocoupler OP1, and the other end of the capacitor C2 is grounded. The capacitor C2 connected to the collector of the output terminal of the optocoupler OP1 further filters out high-frequency interference signals in the optocoupler output signal, making the obstruction signal output to the subsequent circuit (connected to the TO_SIG terminal) purer and avoiding misjudgment of subsequent signal processing by high-frequency noise.
[0027] Please see Figures 1 to 6 Preferably, the negative terminal of the polarized capacitor EC2 is grounded to the eighth pin of the motor 1 interface. The negative terminal of the polarized capacitor EC2 is directly connected to the GND pin (such as pin 8) of the motor 1 interface to form a unified reference ground and avoid potential difference.
[0028] Please see Figures 1 to 6 Preferably, a resistor R2 is also provided, and the positive terminal of the diode D1 is connected to the trigger signal output port of the motor 1 interface. The resistor R2 limits the current, protects the diode D1 and the front-end signal source (the third pin of the motor 1 interface), prevents overcurrent damage, extends component life, and improves circuit stability.
[0029] Please see Figures 1 to 6 Preferably, the motor 1 interface has eight pins, and the trigger signal is output from the third pin of the motor 1 interface, which is connected to the resistor R2. Clearly defining the trigger signal output from the third pin of the motor 1 interface and its connection to resistor R2 makes the circuit pin relationships intuitive, facilitating assembly, debugging, and maintenance, improving operability and maintainability, and simplifying troubleshooting and upgrades.
[0030] Please see Figure 6 , Figure 7 Preferably, a status indication module 6 is also provided. The status indication module 6 includes a resistor R5 and an LED 1. One end of the resistor R5 is connected to the LED pin of the main control module 2, and the other end of the resistor R5 is connected to the positive terminal of the LED 1. The negative terminal of the LED 1 is grounded. LED 1 and R5 together form the status indication module 6, which displays the circuit's operating status in real time (such as encountering an obstacle, running, etc.), facilitating intuitive monitoring by the user, improving usability and fault diagnosis efficiency, and enhancing the user experience. The fourteenth pin of the main control module 2 is a signal input terminal, and the seventh pin of the main control module 2 is the LED pin connected to the resistor R5.
[0031] Please see Figure 1 , Figure 3 , Figure 4 Preferably, the motor drive module 4 further includes a drive module, which includes a control chip U2 and relays KC1 and KC2. Pins 1 (OPEN) and 2 (CLOSE) of the control chip U2 receive switching commands from the main control system (such as "on" and "off" signals, typically active low or high, depending on the specific logic definition). Pins 5-8 (KC1 and KC2 drive): output high-level signals to drive the relay coils, controlling the contacts to close / open. Function: acting as a low-voltage control hub, parsing commands and outputting relay drive signals to achieve isolation between logic control and power drive. The coil terminals of relays KC1 and KC2 are connected to the +12V power supply and the drive pins of U2, controlling contact action through electromagnetic induction. The contact terminals (SXO and XXO) are connected to the load (such as the motor 1 winding, with +12V power supply to the load).
[0032] Please see Figure 2 , Figure 8 , Figure 9 Preferably, power module 3 can be a bridge rectifier circuit, outputting 5V power to the obstacle detection filter circuit 5 and the main control module 2, and outputting 12V power to the motor drive module 4; it also has a wireless remote control module 7 (see attached diagram for specific circuit components) and a button operation module 8 (see attached diagram for specific circuit components). Power module 3, wireless remote control module 7, main control module 2, button operation module 8 and motor drive module 4 are all existing circuit modules, and the specific principles are shown in the attached diagram. No specific protection requirements are specified.
[0033] The working principle of this utility model is as follows:
[0034] When the roller shutter door encounters resistance, the moving block on motor 1 triggers a microswitch to generate a sinusoidal signal, which is then rectified by diode D1 into a unidirectional DC square wave signal.
[0035] After filtering and current limiting by polarized capacitor EC2 and resistor R3, the signal is input to optocoupler OP1. Optocoupler OP1 converts the signal into an electrically isolated output signal through opto-isolation.
[0036] Capacitor C2 filters out high-frequency noise, resistor R4 pulls up the level, and finally inputs the pure TO_SIG signal (trigger signal) into the main control module 2 (such as a microcontroller). The main control module then compares the signal with a preset threshold to control the motor to stop or reverse, thus realizing obstacle detection and feedback control (such as stopping or reversing motor 1).
[0037] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.
[0038] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0039] Finally, the above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.
[0040] It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this utility model should also be considered within the scope of protection of this utility model.
Claims
1. A mechanical resistance-detection and rebound control circuit for a tubular motor, comprising a circuit board and a motor, wherein the circuit board is provided with a main control module, a power supply module, and a motor drive module, the motor drive module includes a motor interface, a contact block is provided on the central shaft of the motor, a micro switch cooperating with the contact block is provided on the circuit board, a trigger signal for the micro switch is output from the motor interface, and the power supply module supplies power to the motor, the main control module, and the motor drive module, characterized in that: It also includes an obstacle detection filtering circuit, which includes a diode D1 and an optocoupler OP1. The positive terminal of the diode D1 is connected to the trigger signal output from the motor interface, and the negative terminal of the diode D1 is connected to the input terminal of the optocoupler OP1 via an RC filter circuit. The collector of the output terminal of the optocoupler OP1 is connected to the output terminal of the power module through a pull-up resistor R4. The collector of the output terminal of the optocoupler OP1 is connected to the signal input terminal of the main control module, and the emitter of the output terminal of the optocoupler OP1 is grounded.
2. The tubular motor mechanical resistance rebound control circuit according to claim 1, characterized in that: The RC filter circuit includes a resistor R3 and a polarized capacitor EC2. The positive terminal of the polarized capacitor EC2 and one end of the resistor R3 are connected to the negative terminal of the diode D1. The negative terminal of the polarized capacitor EC2 is connected to the second pin of the input terminal of the optocoupler OP1. The other end of the resistor R3 is connected to the first pin of the input terminal of the optocoupler OP1.
3. The tubular motor mechanical resistance-detection and rebound control circuit according to claim 2, characterized in that: A capacitor C2 is also provided, one end of which is connected to the collector of the output terminal of the optocoupler OP1, and the other end of which is grounded.
4. The tubular motor mechanical resistance-detection and rebound control circuit according to claim 2, characterized in that: The negative terminal of the polarized capacitor EC2 shares a common ground with the eighth pin of the motor interface.
5. The tubular motor mechanical resistance-detection and rebound control circuit according to claim 1, characterized in that: A resistor R2 is also provided, and the positive terminal of the diode D1 is connected to the trigger signal output port of the motor interface.
6. The tubular motor mechanical resistance rebound control circuit according to claim 5, characterized in that: The motor interface has eight pins, and the trigger signal is output from the third pin of the motor interface, which is connected to the resistor R2.
7. A tubular motor mechanical resistance-detection and rebound control circuit according to claim 1, characterized in that: The system also includes a status indicator module, which comprises a resistor R5 and an LED 1. One end of the resistor R5 is connected to the LED pin of the main control module, and the other end of the resistor R5 is connected to the positive terminal of the LED 1. The negative terminal of the LED 1 is grounded.
8. The tubular motor mechanical resistance rebound control circuit according to claim 7, characterized in that: The fourteenth pin of the main control module is the signal input terminal, and the seventh pin of the main control module is the LED pin, which is connected to the resistor R5.