Push rod motor operation state feedback circuit with operation fault detection function

Abstract

The utility model discloses a push rod motor operation state feedback circuit with an operation fault detection function. The push rod motor operation state feedback circuit comprises a power conversion circuit, a single-chip microcomputer processing circuit, a push rod motor positive and negative rotation driving circuit, a push rod motor current sampling circuit and a push rod motor operation state feedback circuit. According to the utility model, the push rod motor fault feedback circuit is arranged, so that a fault signal can be fed back to the PLC controller in time when the push rod motor is subjected to overlarge resistance or the motor is damaged and stops working, and the PLC controller can immediately cancel a command, thereby protecting the motor and other equipment, reducing the damage risk, and improving the working efficiency. In addition, in cooperation with the arrangement of a push rod motor operation and stop state feedback circuit, a stop signal can be fed back to the PLC in time when the push rod motor reaches the maximum stroke or the minimum stroke and stops working, so that the PLC completes the task on time, the execution efficiency of the controller is improved, and the push rod motor operates more smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of push rod motors, in particular to an operating state feedback circuit of a push rod motor with a running fault detection function. Background Art

[0002] A push rod motor is an actuator that converts electrical energy into mechanical energy and is widely used in various automatic control systems. It usually consists of a motor, a transmission mechanism, and a push rod. When the motor rotates, the rotational motion is converted into the linear motion of the push rod through the transmission mechanism, thereby realizing remote control or automatic operation. Generally, an automatic stop push rod DC motor means that it can stop working when reaching the maximum stroke or the minimum stroke;

[0003] Common push rod motors usually cannot timely feedback the signal of the operating state to the controller. Furthermore, when the controller executes commands, it does not know when the push rod motor has reached the maximum stroke or the minimum stroke and has stopped working, resulting in inaccurate execution of commands by the controller and reduced execution efficiency of the controller. In addition, when a fault occurs in the push rod motor, the signal cannot be timely feedback to the controller, leading to inaccurate execution of commands by the controller, which may cause damage to the motor or other equipment. Considering the above situations, this application proposes an operating state feedback circuit of a push rod motor with a running fault detection function. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose an operating state feedback circuit of a push rod motor with a running fault detection function.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An operating state feedback circuit of a push rod motor with a running fault detection function includes a power conversion circuit, a single-chip microcomputer processing circuit, a forward and reverse drive circuit of the push rod motor, a current sampling circuit of the push rod motor, and an operating state feedback circuit of the push rod motor;

[0007] The power conversion circuit, the single-chip microcomputer processing circuit, the forward and reverse drive circuit of the push rod motor, the current sampling circuit of the push rod motor, and the operating state feedback circuit of the push rod motor are all electrically connected to the PLC controller, and the forward and reverse drive circuit of the push rod motor, the current sampling circuit of the push rod motor, and the operating state feedback circuit of the push rod motor are all electrically connected to the single-chip microcomputer processing circuit;

[0008] The operating state feedback circuit of the push rod motor includes a fault feedback circuit of the push rod motor and an operating / stopping state feedback circuit of the push rod motor.

[0009] Preferably, the power conversion circuit includes a power conversion chip U1, a power conversion chip U2, and a power connector J1. Pin 3 of the power conversion chip U1 is electrically connected to pin 1 of the power conversion chip U2. Both pin 3 of the power conversion chip U1 and pin 1 of the power conversion chip U2 are electrically connected to a 12V DC voltage. Pin 3 of the power conversion chip U1 outputs a 12V DC voltage, and pin 3 of the power conversion chip U2 outputs a 5V DC voltage. One end of capacitor C2 and one end of capacitor C1 are electrically connected to pin 1 of the power conversion chip U1. Pin 1 of the power connector J1 is electrically connected to the 24V power supply of the PLC controller, and pin 1 of the power connector J1 is also electrically connected to pin 1 of the power conversion chip U1. One end of capacitor C3 and one end of capacitor C4 are electrically connected to pin 3 of the power conversion chip U2. Pin 2 of the power connector J1, the other end of capacitor C1, the other end of capacitor C2, pin 2 of the power conversion chip U1, pin 2 of the power conversion chip U2, the other end of capacitor C3, and the other end of capacitor C4 are all electrically connected to each other and grounded.

[0010] Preferably, the single-chip microcomputer processing circuit includes a single-chip microcomputer chip U3, a terminal block J2, and a terminal block J3. Pin 1 of the single-chip microcomputer chip U3 is electrically connected to a 5V power supply. Pin 13 of the single-chip microcomputer chip U3 is electrically connected to one end of capacitor C5 and one end of resistor R2. Pin 1 of the terminal block J2 is electrically connected to one end of resistor R1. The other end of resistor R1 is electrically connected to one end of resistor R2 and one end of capacitor C5. Pin 2 of the terminal block J2, the other end of resistor R2, and the other end of capacitor C5 are all electrically connected to each other and grounded;

[0011] Pin 14 of the single-chip microcomputer chip U3 is grounded. Pin 12 of the single-chip microcomputer chip U3 is electrically connected to one end of capacitor C6 and one end of resistor R4. Pin 1 of the terminal block J3 is electrically connected to one end of resistor R3. The other end of resistor R3 is electrically connected to one end of resistor R4 and one end of capacitor C6. Pin 2 of the terminal block J3, the other end of resistor R4, and the other end of capacitor C6 are all electrically connected to each other and grounded.

[0012] Preferably, the forward and reverse drive circuit of the push rod motor includes a transistor Q1, a relay S1, a motor terminal J4, a transistor Q2, and a relay S2. One end of a resistor R6 is electrically connected to the base of the transistor Q1, and the other end of the resistor R6 is electrically connected to pin 10 of the microcontroller chip U3. The emitters of the transistor Q1 and the transistor Q2 are both grounded. The collector of the transistor Q1 is electrically connected to the positive pole of a diode D1, and the collector of the transistor Q1 is electrically connected to pin 3 of the relay S1. The negative pole of the diode D1 is electrically connected to pin 4 of the relay S1. Pin 3 of the relay S1 is also electrically connected to the positive pole of the diode D1. Pin 2 of the relay S1 is electrically connected to the 24V power supply of the PLC controller. One end of a resistor R5 is electrically connected to both pin 1 of the relay S1 and pin 1 of the relay S2, and the other end of the resistor R5 is grounded. Pin 5 of the relay S1 and pin 5 of the relay S2 are respectively electrically connected to pin 1 and pin 2 of the motor terminal J4. Pin 1 of the relay S1 and pin 1 of the relay S2 are electrically connected;

[0013] The collector of the transistor Q2 is electrically connected to the positive pole of a diode D2, and the collector of the transistor Q2 is electrically connected to pin 3 of the relay S2. The negative pole of the diode D2 is electrically connected to pin 4 of the relay S2. Pin 3 of the relay S2 is also electrically connected to the positive pole of the diode D2. Pin 2 of the relay S2 is electrically connected to the 24V power supply of the PLC controller. One end of a resistor R7 is electrically connected to the base of the transistor Q2, and the other end of the resistor R7 is electrically connected to pin 9 of the microcontroller chip U3.

[0014] Preferably, the push rod motor current sampling circuit includes a push rod motor current sampling circuit one and a push rod motor current sampling circuit two. The push rod motor current sampling circuit one includes an ADC chip U7. One end of a capacitor C7 and one end of a resistor R18 are electrically connected to pin 1 of the ADC chip U7. The other end of the capacitor C7 is grounded. The other end of the resistor R18 is electrically connected to pin 8 of the ADC chip U7. One end of a capacitor C8 is also electrically connected to pin 8 of the ADC chip U7 and the other end of the resistor R18. The other end of the capacitor C8 is grounded. Pin 8 of the ADC chip U7 is also electrically connected to a 5V power supply. Pin 2 of the ADC chip U7 is electrically connected to an IS interface. Pins 3 and 4 of the ADC chip U7 are both grounded. Pin 7 of the ADC chip U7 is electrically connected to the TOCK1 end of pin 5 of the microcontroller chip U3. Pins 5 and 6 of the ADC chip U7 are respectively electrically connected to pins 4 and 11 of the microcontroller chip U3;

[0015] The push rod motor current sampling circuit two includes a comparator U4. One end of a resistor R8 and one end of a resistor R12 are electrically connected to pin 7 of the comparator U4. The other end of the resistor R8 and pin 3 of the comparator U4 are both electrically connected to a 12V voltage. One end of a resistor R9 is also electrically connected to pin 3 of the comparator U4. The other end of the resistor R9 is electrically connected to pin 1 of the comparator U4. One end of a resistor R10 is electrically connected to the other end of the resistor R9. One end of a resistor R11 is electrically connected to the other end of the resistor R10. The other end of the resistor R11 is grounded. The other end of the resistor R10 is electrically connected to pin 8 of the microcontroller chip U3. Pin 6 of the comparator U4 is electrically connected to the IS port. One end of a resistor R13 is also electrically connected to the IS port. The other end of the resistor R13 and pin 12 of the comparator U4 are both grounded.

[0016] Preferably, the push rod motor fault feedback circuit includes a terminal J7 electrically connected to a PLC controller. Pin 1 of the terminal J7 is electrically connected to pin 3 of a transistor Q5 and one end of an indicator light LED3. The other end of the indicator light LED3 is electrically connected to one end of a resistor R20. The other end of the resistor R20 is electrically connected to the 24V power supply of the PLC controller. Pin 2 of the transistor Q5 is electrically connected to one end of a resistor R19. The other end of the resistor R19 is electrically connected to pin 2 of the microcontroller chip U3. Pin 1 of the transistor Q5 and pin 2 of the terminal J7 are electrically connected to each other and grounded.

[0017] Preferably, the push rod motor running and stopping state feedback circuit includes a terminal J5 and a terminal J6 electrically connected to a PLC controller. Pin 1 of the terminal J5 is electrically connected to pin 3 of a transistor Q3 and one end of an indicator light LED1. The other end of the indicator light LED1 is electrically connected to one end of a resistor R14. The other end of the resistor R14 is electrically connected to the 24V power supply of the PLC controller. Pin 2 of the transistor Q3 is electrically connected to one end of a resistor R15. The other end of the resistor R15 is electrically connected to pin 7 of the microcontroller chip U3. Pin 1 of the transistor Q3 and pin 2 of the terminal J5 are electrically connected to each other and grounded;

[0018] Pin 1 of the terminal J6 is electrically connected to pin 3 of a transistor Q4 and one end of an indicator light LED2. The other end of the indicator light LED2 is electrically connected to one end of a resistor R16. The other end of the resistor R16 is electrically connected to the 24V power supply of the PLC controller. Pin 2 of the transistor Q4 is electrically connected to one end of a resistor R17. The other end of the resistor R17 is electrically connected to pin 6 of the microcontroller chip U3. Pin 1 of the transistor Q4 and pin 2 of the terminal J6 are electrically connected to each other and grounded.

[0019] Compared with the existing technology, the beneficial effects of the present utility model are:

[0020] The utility model can, through the provided push rod motor fault feedback circuit, timely feedback a fault signal to the PLC controller when the push rod motor is subject to excessive resistance or the motor is damaged and has stopped working, so that the PLC controller immediately cancels the command, thereby protecting the motor and other devices and reducing the damage risk. In addition, with the setting of the push rod motor operation and stop state feedback circuit, it can timely feedback a stop signal to the PLC controller when the push rod motor reaches the maximum stroke or the minimum stroke and has stopped working, enabling the PLC controller to complete the task on time, improving the execution efficiency of the controller, and making the operation of the push rod motor smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is the circuit diagram of the power conversion circuit in the push rod motor operation state feedback circuit with an operation fault detection function proposed by the utility model;

[0022] Figure 2 FIG. is the circuit diagram of the single-chip microcomputer processing circuit in the push rod motor operation state feedback circuit with an operation fault detection function proposed by the utility model;

[0023] Figure 3 FIG. is the circuit diagram of the forward and reverse drive circuit of the push rod motor in the push rod motor operation state feedback circuit with an operation fault detection function proposed by the utility model;

[0024] Figure 4 FIG. is the circuit diagram of the first push rod motor current sampling circuit in the push rod motor operation state feedback circuit with an operation fault detection function proposed by the utility model;

[0025] Figure 5 FIG. is the circuit diagram of the second push rod motor current sampling circuit in the push rod motor operation state feedback circuit with an operation fault detection function proposed by the utility model;

[0026] Figure 6 FIG. is the circuit diagram of the push rod motor operation and stop state feedback circuit in the push rod motor operation state feedback circuit with an operation fault detection function proposed by the utility model;

[0027] Figure 7 FIG. is the circuit diagram of the push rod motor fault feedback circuit in the push rod motor operation state feedback circuit with an operation fault detection function proposed by the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments.

[0029] Refer to Figure 1-7, A push rod motor operating state feedback circuit with a running fault detection function, including a power conversion circuit, a single-chip microcomputer processing circuit, a push rod motor forward and reverse drive circuit, a push rod motor current sampling circuit, and a push rod motor operating state feedback circuit;

[0030] The power conversion circuit, the single-chip microcomputer processing circuit, the push rod motor forward and reverse drive circuit, the push rod motor current sampling circuit, and the push rod motor operating state feedback circuit are all electrically connected to the PLC controller. The push rod motor forward and reverse drive circuit, the push rod motor current sampling circuit, and the push rod motor operating state feedback circuit are all electrically connected to the single-chip microcomputer processing circuit;

[0031] Among them, the power conversion circuit includes a power conversion chip U1, a power conversion chip U2, and a power connector J1. The model of the power conversion chip U1 is MC7812CT, the model of the power conversion chip U2 is LM7805CT, and the model of the power connector J1 is HDR1X2. The pin 3 of the power conversion chip U1 and the pin 1 of the power conversion chip U2 are electrically connected. The pin 3 of the power conversion chip U1 and the pin 1 of the power conversion chip U2 are both electrically connected to a 12V DC voltage. The pin 3 of the power conversion chip U1 outputs a 12V DC voltage, and the pin 3 of the power conversion chip U2 outputs a 5V DC voltage. One end of the capacitor C2 and one end of the capacitor C1 are electrically connected to the pin 1 of the power conversion chip U1. The pin 1 of the power connector J1 is electrically connected to the 24V power supply of the PLC controller, and the pin 1 of the power connector J1 is also electrically connected to the pin 1 of the power conversion chip U1. One end of the capacitor C3 and one end of the capacitor C4 are electrically connected to the pin 3 of the power conversion chip U2. The pin 2 of the power connector J1, the other end of the capacitor C1, the other end of the capacitor C2, the pin 2 of the power conversion chip U1, the pin 2 of the power conversion chip U2, the other end of the capacitor C3, and the other end of the capacitor C4 are all electrically connected to each other and grounded.

[0032] The single-chip microcomputer processing circuit includes a single-chip microcomputer chip U3, a terminal block J2, and a terminal block J3. The models of the terminal block J2 and the terminal block J3 are both HDR1X2. The model of the single-chip microcomputer chip U3 is PIC16C505. The pin 1 of the single-chip microcomputer chip U3 is electrically connected to a 5V power supply. The pin 13 of the single-chip microcomputer chip U3 is electrically connected to one end of the capacitor C5 and one end of the resistor R2. The pin 1 of the terminal block J2 is electrically connected to one end of the resistor R1. The other end of the resistor R1, one end of the resistor R2, and one end of the capacitor C5 are electrically connected. The pin 2 of the terminal block J2, the other end of the resistor R2, and the other end of the capacitor C5 are all electrically connected to each other and grounded;

[0033] Pin 14 of the microcontroller chip U3 is grounded. One end of a capacitor C6 and one end of a resistor R4 are electrically connected to pin 12 of the microcontroller chip U3. One end of a resistor R3 is electrically connected to pin 1 of the terminal block J3. The other end of the resistor R3, one end of the resistor R4, and one end of the capacitor C6 are electrically connected. Pin 2 of the terminal block J3, the other end of the resistor R4, and the other end of the capacitor C6 are all electrically connected to each other and grounded;

[0034] The forward and reverse drive circuit of the push rod motor includes a transistor Q1, a relay S1, a motor terminal block J4, a transistor Q2, and a relay S2. The models of both the transistor Q1 and the transistor Q2 are 2N2222. The models of both the relay S1 and the relay S2 are TRU-24VDC-FB-CL. The model of the motor terminal block J4 is HDR1X2. One end of a resistor R6 is electrically connected to the base of the transistor Q1. The other end of the resistor R6 is electrically connected to pin 10 of the microcontroller chip U3. The emitters of both the transistor Q1 and the transistor Q2 are grounded. The collector of the transistor Q1 is electrically connected to the positive electrode of a diode D1. The collector of the transistor Q1 is electrically connected to pin 3 of the relay S1. The negative electrode of the diode D1 is electrically connected to pin 4 of the relay S1. Pin 3 of the relay S1 is also electrically connected to the positive electrode of the diode D1. Pin 2 of the relay S1 is electrically connected to the 24V power supply of the PLC controller. One end of a resistor R5 is electrically connected to both pin 1 of the relay S1 and pin 1 of the relay S2. The other end of the resistor R5 is grounded. Pin 5 of the relay S1 and pin 5 of the relay S2 are respectively electrically connected to pin 1 and pin 2 of the motor terminal block J4. Pin 1 of the relay S1 and pin 1 of the relay S2 are electrically connected;

[0035] The collector of the transistor Q2 is electrically connected to the positive electrode of a diode D2. The collector of the transistor Q2 is electrically connected to pin 3 of the relay S2. The negative electrode of the diode D2 is electrically connected to pin 4 of the relay S2. Pin 3 of the relay S2 is also electrically connected to the positive electrode of the diode D2. Pin 2 of the relay S2 is electrically connected to the 24V power supply of the PLC controller. One end of a resistor R7 is electrically connected to the base of the transistor Q2. The other end of the resistor R7 is electrically connected to pin 9 of the microcontroller chip U3;

[0036] The push rod motor current sampling circuit includes a push rod motor current sampling circuit one and a push rod motor current sampling circuit two. The push rod motor current sampling circuit one includes an ADC chip U7, and the model of the ADC chip U7 is ADS8320EB. One end of a capacitor C7 and one end of a resistor R18 are electrically connected to pin 1 of the ADC chip U7. The other end of the capacitor C7 is grounded, and the other end of the resistor R18 is electrically connected to pin 8 of the ADC chip U7. One end of a capacitor C8 is also electrically connected to pin 8 of the ADC chip U7 and the other end of the resistor R18. The other end of the capacitor C8 is grounded. Pin 8 of the ADC chip U7 is also electrically connected to a 5V power supply. Pin 2 of the ADC chip U7 is electrically connected to an IS interface. Pins 3 and 4 of the ADC chip U7 are both grounded. Pin 7 of the ADC chip U7 is electrically connected to the TOCK1 end of pin 5 of the single-chip microcomputer chip U3. Pins 5 and 6 of the ADC chip U7 are respectively electrically connected to pins 4 and 11 of the single-chip microcomputer chip U3;

[0037] The push rod motor current sampling circuit two includes a comparator U4, and the model of the comparator U4 is LM2901D. One end of a resistor R8 and one end of a resistor R12 are electrically connected to pin 7 of the comparator U4. The other end of the resistor R8 and pin 3 of the comparator U4 are both electrically connected to a 12V voltage. One end of a resistor R9 is also electrically connected to pin 3 of the comparator U4. The other end of the resistor R9 is electrically connected to pin 1 of the comparator U4. One end of a resistor R10 is electrically connected to the other end of the resistor R9. One end of a resistor R11 is electrically connected to the other end of the resistor R10, and the other end of the resistor R11 is grounded. The other end of the resistor R10 is electrically connected to pin 8 of the single-chip microcomputer chip U3. Pin 6 of the comparator U4 is electrically connected to an IS port. One end of a resistor R13 is also electrically connected to the IS port, and the other end of the resistor R13 and pin 12 of the comparator U4 are both grounded;

[0038] The push rod motor operation state feedback circuit includes a push rod motor fault feedback circuit and a push rod motor operation / stop state feedback circuit;

[0039] The push rod motor fault feedback circuit includes a terminal J7 electrically connected to a PLC controller. The signal of the terminal J7 is HDR1X2. One end of a transistor Q5 and one end of an indicator lamp LED3 are electrically connected to pin 1 of the terminal J7. The other end of the indicator lamp LED3 is electrically connected to one end of a resistor R20. The other end of the resistor R20 is electrically connected to the 24V power supply of the PLC controller. One end of a resistor R19 is electrically connected to pin 2 of the transistor Q5. The other end of the resistor R19 is electrically connected to pin 2 of the single-chip microcomputer chip U3. Pin 1 of the transistor Q5 and pin 2 of the terminal J7 are electrically connected to each other and grounded;

[0040] The feedback circuit for the operating and stopping states of the push rod motor includes terminals J5 and J6 electrically connected to the PLC controller. The models of both terminals J5 and J7 are HDR1X2. Pin 1 of terminal J5 is electrically connected to pin 3 of transistor Q3 and one end of indicator LED1. The other end of indicator LED1 is electrically connected to one end of resistor R14. The other end of resistor R14 is electrically connected to the 24V power supply of the PLC controller. Pin 2 of transistor Q3 is electrically connected to one end of resistor R15. The other end of resistor R15 is electrically connected to pin 7 of microcontroller chip U3. Pin 1 of transistor Q3 and pin 2 of terminal J5 are electrically connected to each other and grounded;

[0041] Pin 1 of the said terminal J6 is electrically connected to pin 3 of transistor Q4 and one end of indicator LED2. The other end of indicator LED2 is electrically connected to one end of resistor R16. The other end of resistor R16 is electrically connected to the 24V power supply of the PLC controller. Pin 2 of transistor Q4 is electrically connected to one end of resistor R17. The other end of resistor R17 is electrically connected to pin 6 of microcontroller chip U3. Pin 1 of transistor Q4 and pin 2 of terminal J6 are electrically connected to each other and grounded. The models of transistor Q3, transistor Q4 and transistor Q5 are all 2N6659. Through the set push rod motor fault feedback circuit of the present utility model, when the push rod motor is subjected to excessive resistance or the motor is damaged and has stopped working, it can timely feedback a fault signal to the PLC controller, enabling the PLC controller to immediately revoke the command, thereby protecting the motor and other devices and reducing the damage risk. In addition, with the setting of the feedback circuit for the operating and stopping states of the push rod motor, when the push rod motor reaches the maximum or minimum stroke and has stopped working, it can timely feedback a stop signal to the PLC controller, enabling the PLC controller to complete the task on time, improving the execution efficiency of the controller and making the operation of the push rod motor smoother.

[0042] Working principle: When in use and during normal operation, the power conversion chip U1 in the power conversion circuit can convert the 24V DC voltage of the PLC controller into a 12V DC voltage, and the power conversion chip U2 can convert the 12V DC voltage into a 5V DC voltage to supply power to the entire push rod motor. At the same time, capacitors C1, C2, C3, and C4 filter the voltage in the power supply. After the PLC controller issues an "on" or "off" command, the circuit voltage is divided by resistors R1, R2, R3, and R4 in sequence and then sent to the microcontroller chip U3, and its voltage becomes a level voltage suitable for the use of the microcontroller chip U3. During the voltage division process, capacitors C5 and C6 play a filtering role. At the same time, the PLC controller sends commands into pins 13 and 12 of the microcontroller chip U3. The judgment command of the microcontroller chip U3 is to turn the push rod motor on or off, and it is transmitted to the forward and reverse drive circuit of the push rod motor through pins 10 and 9 to achieve forward and reverse actions. If it rotates forward, the GP0 port of pin 10 of the microcontroller chip U3 outputs high, the transistor Q1 conducts, the relay S1 coil is energized, the motor terminal J4 is connected to the contact 2 of the relay S1 and obtains 24V voltage, the GP1 port of pin 9 of the microcontroller chip U3 outputs low, the transistor Q2 is cut off, the relay S2 coil loses power, and the motor terminal J4 is connected to the contact 1 of the relay S2 and forms a loop through the sampling resistor R5, and the push rod motor rotates forward. If it rotates in reverse, the GP1 port of pin 9 of the microcontroller chip U3 outputs high, the transistor Q2 conducts, the relay S2 coil is energized, the motor terminal J4 is connected to the contact 2 of the relay S2 and obtains 24V voltage, the GP0 port of pin 10 of the microcontroller chip U3 outputs low, the transistor Q1 is cut off, the relay S1 coil loses power, and the motor terminal J4 is connected to the contact 1 of the relay S1 and forms a loop through the sampling resistor R5, and the push rod motor rotates in reverse. Among them, during the process of controlling forward and reverse rotation, resistors R6 and R7 play a current limiting role, and diodes D1 and D2 play a role in freewheeling of the relay S1 and relay S2 coils;

[0043] When the PLC controller issues an open command and the push rod motor rotates forward, when the microcontroller chip U3 detects a rising edge on pin 8, it outputs high through pin 7. After passing through resistor R15, transistor Q3 is turned on, and the 24V power supply forms a circuit through resistor R14, indicator LED1, and transistor Q3 to light up indicator LED1. The signal output to terminal J5 becomes low. When the PLC controller detects that the signal at terminal J5 is low, it means that the push rod motor has reached its maximum stroke. It feeds back to the PLC controller that the push rod motor has been opened in place, reaches the maximum stroke, and maintains this signal. The PLC controller cancels the running command of the push rod motor; when the push rod motor rotates backward, when the microcontroller chip U3 detects a rising edge on pin 8, it outputs high through pin 7, feeding back to the PLC controller that the push rod motor has been closed in place, reaches the minimum stroke, and maintains this signal. At the same time, pin 7 outputs low, indicating that the push rod motor is not at the maximum stroke. When the push rod motor runs to the minimum stroke, pin 6 outputs high. After passing through resistor R17, transistor Q4 is turned on, and the 24V power supply forms a circuit through resistor R16, indicator LED2, and transistor Q4 to light up indicator LED2. The signal output to terminal J6 becomes low. When the PLC detects that the signal at terminal J6 is low, it means that the motor has reached the minimum stroke. The PLC controller cancels the motor running command, thereby realizing that when the push rod motor reaches the maximum or minimum stroke and has stopped working, it timely feeds back a stop signal to the PLC controller, enabling the PLC controller to complete this task on time and improving the execution efficiency of the PLC controller;

[0044] When the push rod motor is working, the push rod motor current sampling circuit two (as shown in Figure 4 ) samples the current situation in the circuit. When the push rod motor stops working under normal circumstances, V IS is 0V, and when the push rod motor is running, it is about 1V. When the push rod motor stops working, V IS is 0V, lower than the voltage at pin 7 of comparator U4, and the output is high; when the push rod motor is running, V IS is 1V, higher than the voltage at pin 7 of comparator U4, and the output has a falling edge and becomes low; when the push rod motor runs to the maximum or minimum stroke, the push rod motor automatically stops working, V IS is 0V, lower than the voltage at pin 7 of comparator U4, and the output has a rising edge and becomes high. When the microcontroller chip U3 detects a falling edge on pin 8, it determines that the push rod motor starts to work. When it detects a rising edge on pin 8, it determines that the push rod motor runs to the maximum or minimum stroke and stops working, and will send a signal to the PLC controller that the push rod motor reaches the maximum or minimum stroke and stops working, further improving the execution efficiency of the PLC controller;

[0045] In addition, the push rod motor current sampling circuit one (as shown in Figure 5 ) samples the current situation in the circuit. Under normal circumstances, when the push rod motor stops working, VIS is 0V and about 1V when the motor is running. When the push rod motor stops working due to a fault, V IS is above 3V. At this time, the single-chip microcomputer chip U3 determines that there is a motor fault and will send a signal of the push rod motor fault and stop working to the PLC controller. The PLC controller immediately cancels the running instruction to avoid further damage to the push rod motor or other equipment. When a fault occurs during motor operation, the signal output from pin 2 of the single-chip microcomputer chip U3 is high. Transistor Q5 is turned on through resistor R18. The 24V power supply forms a loop through R18, indicator LED3 and transistor Q5 to light up indicator LED3. The signal output to terminal J7 becomes low. The PLC controller detects that the signal of J7 is low, which means that the motor has a fault. The PLC immediately cancels the motor running command, thus further avoiding damage to the motor or other equipment.

[0046] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A feedback circuit for the operating state of a push rod motor with a running fault detection function, characterized in that, It includes a power conversion circuit, a single-chip microcomputer processing circuit, a forward and reverse drive circuit for the push rod motor, a current sampling circuit for the push rod motor, and a feedback circuit for the operating state of the push rod motor; The power conversion circuit, the single-chip microcomputer processing circuit, the forward and reverse drive circuit for the push rod motor, the current sampling circuit for the push rod motor, and the feedback circuit for the operating state of the push rod motor are all electrically connected to the PLC controller. The forward and reverse drive circuit for the push rod motor, the current sampling circuit for the push rod motor, and the feedback circuit for the operating state of the push rod motor are all electrically connected to the single-chip microcomputer processing circuit; The feedback circuit for the operating state of the push rod motor includes a fault feedback circuit for the push rod motor and a feedback circuit for the operating and stopping states of the push rod motor.

2. The feedback circuit for the operating state of a push rod motor with an operating fault detection function according to claim 1, wherein, The power conversion circuit includes a power conversion chip U1, a power conversion chip U2, and a power connector J1. Pin 3 of the power conversion chip U1 is electrically connected to pin 1 of the power conversion chip U2. Pin 3 of the power conversion chip U1 and pin 1 of the power conversion chip U2 are both electrically connected to a 12V DC voltage. Pin 3 of the power conversion chip U1 outputs a 12V DC voltage, and pin 3 of the power conversion chip U2 outputs a 5V DC voltage. One end of capacitor C2 and one end of capacitor C1 are electrically connected to pin 1 of the power conversion chip U1. Pin 1 of the power connector J1 is electrically connected to the 24V power supply of the PLC controller, and pin 1 of the power connector J1 is also electrically connected to pin 1 of the power conversion chip U1. One end of capacitor C3 and one end of capacitor C4 are electrically connected to pin 3 of the power conversion chip U2. Pin 2 of the power connector J1, the other end of capacitor C1, the other end of capacitor C2, pin 2 of the power conversion chip U1, pin 2 of the power conversion chip U2, the other end of capacitor C3, and the other end of capacitor C4 are all electrically connected to each other and grounded.

3. The feedback circuit for the operating state of a push rod motor with an operating fault detection function according to claim 1, characterized in that, The single-chip microcomputer processing circuit includes a single-chip microcomputer chip U3, a terminal block J2, and a terminal block J3. Pin 1 of the single-chip microcomputer chip U3 is electrically connected to a 5V power supply. One end of capacitor C5 and one end of resistor R2 are electrically connected to pin 13 of the single-chip microcomputer chip U3. One end of resistor R1 is electrically connected to pin 1 of the terminal block J2. The other end of resistor R1, one end of resistor R2, and one end of capacitor C5 are electrically connected to each other. Pin 2 of the terminal block J2, the other end of resistor R2, and the other end of capacitor C5 are all electrically connected to each other and grounded; Pin 14 of the single-chip microcomputer chip U3 is grounded. One end of capacitor C6 and one end of resistor R4 are electrically connected to pin 12 of the single-chip microcomputer chip U3. One end of resistor R3 is electrically connected to pin 1 of the terminal block J3. The other end of resistor R3, one end of resistor R4, and one end of capacitor C6 are electrically connected to each other. Pin 2 of the terminal block J3, the other end of resistor R4, and the other end of capacitor C6 are all electrically connected to each other and grounded.

4. The feedback circuit for the operating state of the push rod motor with an operating fault detection function according to claim 3, characterized in that The forward and reverse drive circuit of the push rod motor includes a transistor Q1, a relay S1, a motor terminal block J4, a transistor Q2, and a relay S2. One end of a resistor R6 is electrically connected to the base of the transistor Q1, and the other end of the resistor R6 is electrically connected to pin 10 of the microcontroller chip U3. The emitters of the transistor Q1 and the transistor Q2 are both grounded. The collector of the transistor Q1 is electrically connected to the positive electrode of a diode D1, the collector of the transistor Q1 is electrically connected to pin 3 of the relay S1, the negative electrode of the diode D1 is electrically connected to pin 4 of the relay S1, pin 3 of the relay S1 is also electrically connected to the positive electrode of the diode D1, pin 2 of the relay S1 is electrically connected to the 24V power supply of the PLC controller, one end of a resistor R5 is electrically connected to both pin 1 of the relay S1 and pin 1 of the relay S2, the other end of the resistor R5 is grounded, pin 5 of the relay S1 and pin 5 of the relay S2 are respectively electrically connected to pin 1 and pin 2 of the motor terminal block J4, and pin 1 of the relay S1 and pin 1 of the relay S2 are electrically connected; The collector of the transistor Q2 is electrically connected to the positive electrode of a diode D2, the collector of the transistor Q2 is electrically connected to pin 3 of the relay S2, the negative electrode of the diode D2 is electrically connected to pin 4 of the relay S2, pin 3 of the relay S2 is also electrically connected to the positive electrode of the diode D2, pin 2 of the relay S2 is electrically connected to the 24V power supply of the PLC controller, one end of a resistor R7 is electrically connected to the base of the transistor Q2, and the other end of the resistor R7 is electrically connected to pin 9 of the microcontroller chip U3.

5. The operating state feedback circuit of a push rod motor with a running fault detection function according to claim 1, characterized in that, The push rod motor current sampling circuit includes a push rod motor current sampling circuit one and a push rod motor current sampling circuit two. The push rod motor current sampling circuit one includes an ADC chip U7. One end of a capacitor C7 and one end of a resistor R18 are electrically connected to pin 1 of the ADC chip U7, the other end of the capacitor C7 is grounded, the other end of the resistor R18 is electrically connected to pin 8 of the ADC chip U7, one end of a capacitor C8 is also electrically connected to pin 8 of the ADC chip U7 and the other end of the resistor R18, the other end of the capacitor C8 is grounded, pin 8 of the ADC chip U7 is also electrically connected to the 5V power supply, pin 2 of the ADC chip U7 is electrically connected to an IS interface, pins 3 and 4 of the ADC chip U7 are both grounded, pin 7 of the ADC chip U7 is electrically connected to the TOCK1 end of pin 5 of the microcontroller chip U3, and pins 5 and 6 of the ADC chip U7 are respectively electrically connected to pins 4 and 11 of the microcontroller chip U3; The push rod motor current sampling circuit two includes a comparator U4. One end of a resistor R8 and one end of a resistor R12 are electrically connected to pin 7 of the comparator U4. The other end of the resistor R8 and pin 3 of the comparator U4 are both electrically connected to a 12V voltage. One end of a resistor R9 is also electrically connected to pin 3 of the comparator U4. The other end of the resistor R9 is electrically connected to pin 1 of the comparator U4. One end of a resistor R10 is electrically connected to the other end of the resistor R9. One end of a resistor R11 is electrically connected to the other end of the resistor R10, and the other end of the resistor R11 is grounded. The other end of the resistor R10 is electrically connected to pin 8 of the microcontroller chip U3. Pin 6 of the comparator U4 is electrically connected to the IS port. One end of a resistor R13 is also electrically connected to the IS port, and the other end of the resistor R13 and pin 12 of the comparator U4 are both grounded.

6. The feedback circuit for the operating state of a push rod motor with a running fault detection function according to claim 1, characterized in that, The push rod motor fault feedback circuit includes a terminal J7 electrically connected to the PLC controller. Pin 1 of the terminal J7 is electrically connected to pin 3 of a transistor Q5 and one end of an indicator light LED3. The other end of the indicator light LED3 is electrically connected to one end of a resistor R20. The other end of the resistor R20 is electrically connected to the 24V power supply of the PLC controller. Pin 2 of the transistor Q5 is electrically connected to one end of a resistor R19. The other end of the resistor R19 is electrically connected to pin 2 of the microcontroller chip U3. Pin 1 of the transistor Q5 and pin 2 of the terminal J7 are electrically connected to each other and grounded.

7. A feedback circuit for the operating state of a push rod motor with a running fault detection function according to claim 1, characterized in that, The push rod motor running and stopping state feedback circuit includes a terminal J5 and a terminal J6 electrically connected to the PLC controller. Pin 1 of the terminal J5 is electrically connected to pin 3 of a transistor Q3 and one end of an indicator light LED1. The other end of the indicator light LED1 is electrically connected to one end of a resistor R14. The other end of the resistor R14 is electrically connected to the 24V power supply of the PLC controller. Pin 2 of the transistor Q3 is electrically connected to one end of a resistor R15. The other end of the resistor R15 is electrically connected to pin 7 of the microcontroller chip U3. Pin 1 of the transistor Q3 and pin 2 of the terminal J5 are electrically connected to each other and grounded; Pin 1 of the terminal J6 is electrically connected to pin 3 of a transistor Q4 and one end of an indicator light LED2. The other end of the indicator light LED2 is electrically connected to one end of a resistor R16. The other end of the resistor R16 is electrically connected to the 24V power supply of the PLC controller. Pin 2 of the transistor Q4 is electrically connected to one end of a resistor R17. The other end of the resistor R17 is electrically connected to pin 6 of the microcontroller chip U3. Pin 1 of the transistor Q4 and pin 2 of the terminal J6 are electrically connected to each other and grounded.

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