Electric door detection circuit suitable for motor without limiting feedback signal

Abstract

The utility model relates to an integrated electronic circuit, in particular to an electrically operated gate detection circuit applicable to a motor without limiting feedback signals, which comprises a motor and two relays for respectively controlling the motor to ascend and descend, the relays are controlled by a control module, and a limiting detection circuit is further arranged between the relays and the motor. When the motor ascends or descends to a mechanical limiting position, the limiting detection circuit is connected with the motor and feeds back a limiting signal to the control module, and when the control module receives the limiting signal, the control module controls the corresponding relay to stop working. Compared with the prior art, a special motor for limiting feedback does not need to be used, and the device has the advantages of being few in connecting wire harness, convenient to install, low in failure rate, low in production cost and the like.

Description

Technical Field

[0001] This utility model relates to integrated electronic circuits, and in particular to an electric door detection circuit applicable to motors with unlimited position feedback signals. Background Technology

[0002] In electric door control systems, limit feedback is a crucial element ensuring the safe and accurate operation of the door. It primarily detects the door's position and feeds the signal back to the control system, enabling functions such as automatic stop, anti-pinch, and position indication. However, dedicated motors with limit feedback are expensive, making them too costly for ordinary commercial / residential electric doors. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model proposes an electric door detection circuit applicable to motors with unlimited position feedback signals. The circuit includes a motor and two relays that control the motor to rise and fall respectively. The relays are controlled by a control module. A limit detection circuit is also provided between the relays and the motor. When the motor rises or falls to its mechanical limit position, the limit detection circuit connects to the motor and feeds back a limit signal to the control module. When the control module receives the limit signal, it controls the corresponding relay to stop working.

[0004] Furthermore, the limit detection circuit is connected to the motor's upward mechanical limit structure or downward limit structure. When the mechanical limit structure reaches its limit, the limit detection circuit receives an electrical signal, divides the voltage through cascaded resistors, and then converts it through an opto-isolation circuit to obtain a feedback signal, which is then fed back to the control module.

[0005] Furthermore, the limit detection circuit includes a rectifier chip and an optocoupler relay. The signal received by the limit detection circuit is current-limited by multiple cascaded resistors and then input to the rectifier chip. A diode is connected between the two output terminals of the rectifier chip. The input terminal of the diode is connected to the positive output terminal of the rectifier chip and the positive input terminal of the optocoupler relay. The output terminal of the diode is connected to the negative output terminal of the rectifier chip and the negative input terminal of the optocoupler relay. The positive output terminal of the optocoupler relay provides a feedback limit signal to the control module, and a pull-up resistor is set between the positive output terminal and the direct power supply terminal.

[0006] Furthermore, a resistor and a transistor are placed between the control module and the relay. One end of the resistor is connected to the control module, and the other end is connected to the base of the transistor. The emitter of the transistor is grounded, and the collector is connected to the input terminal of the relay.

[0007] Furthermore, the control module is connected to the button circuit, which includes three button switches: one button switch for controlling the operation of the rising relay, one button switch for controlling the operation of the falling relay, and one button switch for controlling both the rising and falling relays to stop operating.

[0008] Furthermore, the AC-DC power supply circuit converts AC power into 5V and 12V DC power to provide power to other modules of the circuit.

[0009] Furthermore, the control module is connected to the indicator module. When a corresponding limit signal is detected, the control module controls the LED light of the indicator module to light up.

[0010] Furthermore, the control module is connected to the LCD display module. When the control module receives a limit signal from the rising mechanical limit end, the LCD display module displays that the upper limit has been reached; when the control module receives a limit signal from the falling mechanical limit end, the LCD display module displays that the lower limit has been reached.

[0011] Compared with existing technologies, this utility model does not require the use of a dedicated motor with limit feedback, and has the advantages of fewer connecting wires, convenient installation, low failure rate, and low production cost. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the module structure of an electric door detection circuit applicable to an infinite-position feedback signal motor according to the present invention;

[0013] Figure 2 This is a schematic diagram showing the connection between the motor, relay, and detection circuit in one embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram of the connection of the limit detection circuit of this utility model;

[0015] Figure 4 This is a schematic diagram of the relay circuit connection of this utility model;

[0016] Figure 5 This is a schematic diagram of the control module used in one embodiment of the present invention;

[0017] Figure 6 This is a schematic diagram of the AC-DC power supply circuit connection used in one embodiment of the present invention. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This utility model proposes an electric door detection circuit applicable to motors with unlimited position feedback signals. It includes a motor and two relays that control the motor to rise and fall respectively. The relays are controlled by a control module. A limit detection circuit is also provided between the relays and the motor. When the motor rises or falls to its mechanical limit position, the limit detection circuit connects to the motor and feeds back a limit signal to the control module. When the control module receives the limit signal, it controls the corresponding relay to stop working.

[0020] like Figure 1 In this embodiment, the first relay is used to control the motor to rise. When the motor reaches its rising mechanical limit, the first limit detection circuit is turned on and sends the detected signal to the control module. When the control module receives the signal, it controls the first relay to stop working. Similarly, the second relay is used to control the motor to descend. When the motor reaches its descending mechanical limit, the second limit detection circuit is turned on and sends the detected signal to the control module. When the control module receives the signal, it controls the second relay to stop working.

[0021] like Figure 2 In this invention, the forward rotation output terminal of the motor is connected to the rising relay, the motor rising mechanical limit switch, and the positive input of the motor rising limit detection circuit; similarly, the reverse rotation output terminal of the motor is connected to the falling relay, the motor falling mechanical limit switch, and the positive input of the motor falling limit detection circuit; the negative inputs of both the motor rising limit detection circuit and the motor falling limit detection circuit are connected to the neutral wire. Both the motor rising and falling mechanical limits are implemented using switches; when the upper or lower mechanical limit of the motor is reached, the corresponding switch closes.

[0022] like Figure 3 In this invention, the limit detection circuit includes a rectifier chip U1 and an optocoupler relay U2. The signal received by the limit detection circuit passes through multiple cascaded resistors (e.g., Figure 2The current is limited by a series of resistors R1, R2, R3, and R4 before being input to a rectifier chip. The positive output terminal of the rectifier chip is connected to one end of a fifth resistor R5. The other end of the fifth resistor is connected to the output terminal of diode D1, the positive output terminal of the rectifier chip, and the negative input terminal of the optocoupler relay. The input terminal of the diode is connected to the negative output terminal of the rectifier chip and the positive input terminal of the optocoupler relay. The positive output terminal of the optocoupler relay provides a feedback limit signal to the control module, and a pull-up resistor, namely the sixth resistor R6, is set between this positive output terminal and the direct power supply terminal. The other end of the sixth resistor is connected to a 5V DC power supply.

[0023] Specifically, the first limit detection circuit includes four cascaded 4700-ohm resistors. One end of the cascaded resistors is connected to the motor forward output, the first relay output, and the motor's upward mechanical limit. The other end of the cascaded resistors is connected to the positive input of the rectifier chip. In this embodiment, the rectifier chip is selected as MB1OS. The negative input of the rectifier chip is connected to the live wire. The negative output of the rectifier chip is connected to the input of the diode and the positive input of the optocoupler relay. In this embodiment, the optocoupler relay is selected as BL817B, and the diode is selected as SR240. The positive output of the rectifier chip is connected to a 4700-ohm resistor and then connected to the output of the diode and the negative input of the optocoupler relay. The negative output of the optocoupler relay is grounded. The positive output of the optocoupler relay outputs a feedback signal connected to the control module. The positive output of the optocoupler relay is connected to the 5V power supply and connected to a 2200-ohm resistor as a pull-up resistor.

[0024] Specifically, the second limit detection circuit has the same structure as the first limit detection circuit. The second limit detection circuit includes four cascaded 4700-ohm resistors. One end of the cascaded resistors is connected to the motor reverse output terminal, the second relay output terminal, and the motor's descent mechanical limit terminal. The other end of the cascaded resistors is connected to the positive input of the rectifier chip. In this embodiment, the rectifier chip is selected as MB1OS. The negative input of the rectifier chip is connected to the live wire. The negative output of the rectifier chip is connected to the input terminal of the diode and the positive input of the optocoupler relay. In this embodiment, the optocoupler relay is selected as BL817B. The positive output of the rectifier chip is connected to a 4700-ohm resistor and then connected to the output terminal of the diode and the negative input terminal of the optocoupler relay. The negative output terminal of the optocoupler relay is grounded. The positive output terminal of the optocoupler relay outputs a feedback signal and is connected to the control module. The positive output terminal of the optocoupler relay is connected to the 5V power supply terminal and connected to a 2200-ohm resistor as a pull-up resistor.

[0025] like Figure 4This embodiment provides a specific application of an electric door detection circuit suitable for an infinite-position feedback signal motor. In this embodiment, the relays include an ascending relay and a descending relay. The input terminal of each relay is connected to a pin of the control module. A resistor (1000 ohms) and a transistor (S8050) are placed between the control module and the relays. One end of the resistor is connected to the control module, and the other end is connected to the base of the transistor. The emitter of the transistor is grounded, and the collector is connected to the input terminal of the relay. The ascending relay is used to control the forward rotation output of the motor. In this embodiment, the forward rotation output terminal is connected to the motor ascending detection circuit. When the motor reaches the ascending mechanical limit, the ascending detection circuit... The detection circuit feeds back a signal to a designated pin of the control module. When the designated pin of the control module receives this signal, it needs to indicate through the indicator module or display module that the motor has reached the mechanical limit for rising. At the same time, the control module controls the motor to stop working through the rising relay. Similarly, the falling relay is used to control the motor to reverse the output. In this embodiment, the reverse output terminal is connected to the motor falling detection circuit. When the motor is detected to have reached the mechanical limit for falling, the falling detection circuit feeds back a signal to a designated pin of the control module. When the designated pin of the control module receives this signal, it needs to indicate through the indicator module or display module that the motor has reached the mechanical limit for falling. At the same time, the control module controls the motor to stop working through the falling relay.

[0026] like Figure 4 In this embodiment, pin 1 of the relay is connected to the collector of the transistor, and pin 2 of the relay is connected to the 12V DC power supply. A diode (model 1N4007) is also connected between pin 1 and pin 2, with the positive terminal of the diode connected to pin 1 and the negative terminal connected to pin 2. The relay switch is controlled to contact the normally open contact or the normally closed switch by adjusting the voltage between pin 1 and pin 2. This is a well-known principle in the art and will not be described in detail here.

[0027] like Figure 5 In this embodiment, an APT32F102 MCU processor is selected as the control module to illustrate this implementation scheme. The APT32F102 includes 24 pins, and the package of each pin is as follows: Figure 5 Pin 1 of the chip is connected to a 5V power supply, and pin 24 is grounded; pin 23 is used to connect to one end of the resistor in the rising relay circuit, and pin 24 is used to connect to one end of the resistor in the falling relay circuit; pin 20 is used to receive the motor rising limit feedback signal, and pin 21 is used to receive the motor falling limit feedback signal.

[0028] As an optional implementation, this embodiment also includes an indicator module, which is implemented by a light-emitting diode. The light-emitting diode can be controlled by pin 13 of an MCU processor of model APT32F102. A 2200-ohm resistor is also provided between the light-emitting diode and pin 13. The light-emitting diode is lit when the motor rotates forward and reverse.

[0029] As an optional implementation, this embodiment also includes a button circuit connection. The button circuit includes three button switches: one button switch for controlling the operation of the rising relay, one button switch for controlling the operation of the falling relay, and one button switch for controlling both the rising and falling relays to stop operating. In this embodiment, pins 14 to 16 of an APT32F102 MCU processor can be connected to the three button switches respectively. When the button switch for controlling the operation of the rising relay is pressed, the rising relay starts operating; when the button switch for controlling the operation of the falling relay is pressed, the falling relay starts operating; when the button switch for controlling both the rising and falling relays to stop operating is pressed, all relays are activated.

[0030] As an optional implementation, this embodiment also includes a display module, which is implemented through an LCD screen. When the control module receives a signal corresponding to the upward mechanical limit, the LCD screen indicates that the upward mechanical limit has been reached; when the control module receives a signal corresponding to the downward mechanical limit, the LCD screen indicates that the downward mechanical limit has been reached. The clock of the LCD screen is controlled by pin 4 of the MCU processor (model APT32F102), and the display content is controlled by pin 3. Pins 10 and 11 are respectively connected to the LCD screen transmitting module UARTO-RX and the LCD screen receiving module UARTO-TX.

[0031] As an optional implementation, this embodiment also provides an AC-DC power supply circuit between the neutral and live wires. This circuit is used to convert the AC power to 5V and 12V DC power to provide power to other modules in this application, such as... Figure 6 The circuit is connected between the neutral and live wires via a coil. The other end of the coil is connected to a diode bridge. The negative terminal of the diode bridge is grounded, and the positive terminal is connected to the first pin of the linear regulator, a 15V DC power supply, and the positive terminal of an electrolytic capacitor. The negative terminal of the electrolytic capacitor is grounded. The second pin of the linear regulator is grounded. The second pin is connected to the positive terminal of another electrolytic capacitor, one end of a capacitor, and a 5V DC power supply. The negative terminal and the other end of the electrolytic capacitor are grounded respectively.

[0032] It should be understood that the innovation of this utility model is achieved through, for example... Figure 3The detection circuit shown detects whether the motor has reached its upward or downward mechanical limit. One end of the circuit is connected to the forward output terminal and the limit terminal, while the other end is used to feed back the detection signal to the control module. This circuit is used between the motor and its control module in cases where there is no limit feedback signal, to provide the control module with the motor's limit status. The innovation of this invention does not involve any signal processing or control. Those skilled in the art can use any control chip. After receiving the corresponding detection signal, in addition to using the LCD display and indicator lights provided by this invention to display the working status, those skilled in the art can use any method, such as a buzzer, to display the working status. Besides using a push-button switch to operate the motor as proposed in this invention, those skilled in the art can also use other methods.

[0033] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "outer", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "rotation", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detection circuit for an electric door using a motor with unlimited feedback signals, comprising a motor and two relays that control the motor's upward and downward movement respectively, the relays being controlled by a control module, characterized in that... A limit detection circuit is also provided between the relay and the motor. When the motor rises or falls to its mechanical limit position, the limit detection circuit connects to the motor and feeds back a limit signal to the control module. When the control module receives the limit signal, it controls the corresponding relay to stop working.

2. The electric door detection circuit according to claim 1, characterized in that, The limit detection circuit is connected to the motor's upward mechanical limit structure or downward limit structure. When the mechanical limit structure reaches its limit, the limit detection circuit receives an electrical signal, divides the voltage through cascaded resistors, and then converts it through an opto-isolation circuit to obtain a feedback signal, which is then fed back to the control module.

3. The electric door detection circuit according to claim 2, characterized in that, The limit detection circuit includes a rectifier chip and an optocoupler relay. The signal received by the limit detection circuit is current-limited by multiple cascaded resistors and then input to the rectifier chip. A diode is connected between the two output terminals of the rectifier chip. The input terminal of the diode is connected to the positive output terminal of the rectifier chip and the positive input terminal of the optocoupler relay. The output terminal of the diode is connected to the negative output terminal of the rectifier chip and the negative input terminal of the optocoupler relay. The positive output terminal of the optocoupler relay provides a feedback limit signal to the control module, and a pull-up resistor is set between the positive output terminal and the direct power supply terminal.

4. The electric door detection circuit according to claim 1, characterized in that, A resistor and a transistor are placed between the control module and the relay. One end of the resistor is connected to the control module, and the other end is connected to the base of the transistor. The emitter of the transistor is grounded, and the collector is connected to the input terminal of the relay.

5. The electric door detection circuit according to any one of claims 1 to 4, characterized in that, The control module is connected to the button circuit, which includes three button switches: one button switch to control the operation of the rising relay, one button switch to control the operation of the falling relay, and one button switch to control both the rising and falling relays to stop operating.

6. The electric door detection circuit according to any one of claims 1 to 4, characterized in that, The AC-DC power supply circuit converts AC power into 5V and 12V DC power to provide power to other modules in the circuit.

7. The electric door detection circuit according to any one of claims 1 to 4, characterized in that, The control module is connected to the indicator module. When the corresponding limit signal is detected, the control module controls the LED light of the indicator module to light up.

8. The electric door detection circuit according to any one of claims 1 to 4, characterized in that, The control module is connected to the LCD display module. When the control module receives a limit signal from the rising mechanical limit end, the LCD display module displays that the upper limit has been reached; when the control module receives a limit signal from the falling mechanical limit end, the LCD display module displays that the lower limit has been reached.

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