Testing tool of motor production line

Abstract

The invention discloses a testing tool of a motor production line, and belongs to the technical field of industrial automatic testing. Comprising a master control MCU unit, an input interaction module and a man-machine interaction output module, the input interaction module comprises a key operation circuit and a CAN transceiver circuit, the key operation circuit comprises a stop control circuit, a forward rotation control circuit, a reverse rotation control circuit and a one-key calibration circuit, the CAN transceiver circuit is in communication connection with a motor controller, and the one-key calibration circuit is in communication connection with the motor controller. The man-machine interaction output module comprises a serial port screen circuit, a buzzer circuit and an indicating circuit, the serial port screen circuit is connected with the liquid crystal display screen, and the liquid crystal display screen is used for displaying the state and test data of the motor in real time and displaying error information when the motor is abnormal. The buzzer circuit and the indicating circuit are used for real-time operation feedback and fault alarm. The method has the advantages that the production line detection efficiency is remarkably improved, the fault diagnosis and quality control capability is enhanced, the operation experience and interaction are optimized, and the test stability and safety are improved.

Description

Technical Field

[0001] This invention belongs to the field of industrial automation testing technology, specifically relating to a testing fixture for a motor production line. Background Technology

[0002] In modern motor manufacturing lines, precise calibration and performance testing of finished motors are crucial for ensuring product quality. Currently, specialized automated testing fixtures are commonly used on production lines to test motors. These fixtures typically connect to the motor under test via electrical interfaces, signal acquisition modules, and mechanical clamps to measure and calibrate key parameters such as speed, torque, current, vibration, and noise.

[0003] However, existing testing fixtures have significant limitations in practical applications: limited by the number of hardware interfaces and signal channel capacity of the fixtures themselves, the number of motors that can be connected and tested at one time is limited, resulting in low overall testing efficiency on the production line and becoming one of the main bottlenecks restricting the improvement of production cycle time. Especially during production ramp-up or batch delivery stages, the motor testing process often experiences severe backlog, seriously affecting the overall output and delivery cycle of the production line.

[0004] In addition, existing single-station testing methods suffer from low equipment utilization, large footprint, and frequent manual intervention. Although parallel testing can be achieved by replicating multiple sets of tooling, this leads to a significant increase in hardware costs, increased complexity in production line layout, and difficulty in achieving centralized management and synchronous analysis of test data and calibration instructions.

[0005] Therefore, how to overcome the interface limitations of existing testing fixtures and achieve parallel, efficient, and collaborative testing of multiple motors by a single fixture without significantly increasing hardware costs and space requirements has become a pressing technical problem to be solved in order to improve the overall efficiency and intelligence level of motor production lines. To this end, the applicant has made a beneficial design, and the technical solution described below arose from this background. Summary of the Invention

[0006] The purpose of this invention is to provide a testing fixture for motor production lines, which can significantly improve production line testing efficiency, enhance fault diagnosis and quality control capabilities, and optimize the user experience and interaction.

[0007] The objective of this invention is achieved by providing a testing fixture for a motor production line, comprising a main control MCU unit and an input interaction module and a human-machine interaction output module connected to the main control MCU unit. The input interaction module includes a button operation circuit and a CAN transceiver circuit. The button operation circuit includes a stop control circuit, a forward rotation control circuit, a reverse rotation control circuit, and a one-key calibration circuit for the motor. The CAN transceiver circuit is communicatively connected to a motor controller to acquire motor operating parameters. The human-machine interaction output module includes a serial port screen circuit, a buzzer circuit, and an indicator circuit. The serial port screen circuit is connected to an LCD screen, which displays the motor status and test data in real time. The test data includes the motor temperature obtained through the CAN interface, the temperature value collected by a thermistor, and the standby current value collected by a current sensor. The buzzer circuit and indicator circuit provide immediate audible feedback during operation and provide fault alarms when motor malfunctions, including motor malfunctions, encoder malfunctions, control malfunctions, and system malfunctions.

[0008] In a specific embodiment of the present invention, the main control MCU unit includes a microcontroller U1, a crystal oscillator circuit, and a reset circuit. The microcontroller U1 is an N32G455CCL7. The reset circuit includes resistors R8 and R10, a diode D4, a capacitor C17, and a reset button SW5. The reset button SW5 is a TS665CJ. One end of the resistor R8 is connected to a +3.3V DC power supply. The other end of the resistor R8, one end of the resistor R10, and one end of the capacitor C17 are all connected to pin 7 of the microcontroller U1. The other end of the resistor R10 is connected to the positive terminal of the diode D4. The negative terminal of the diode D4 is connected to pin 2 of the reset button SW5. Pin 3 of the reset button SW5 and the other end of the capacitor C17 are all grounded. The reset button SW5 is used to reset the system and clear the current state.

[0009] In another specific embodiment of the present invention, the button operation circuit includes a stop control circuit, a forward rotation control circuit, a reverse rotation control circuit, and a one-key calibration circuit. The stop control circuit includes resistors R1 and R4, a diode D1, a capacitor C3, and a stop button SW2. One end of resistor R1, one end of resistor R4, and one end of capacitor C3 are connected to pin 13 of the microcontroller U1. The other end of resistor R4 is connected to the anode of diode D1, and the cathode of diode D1 is connected to pin 2 of the stop button SW2. The forward rotation control circuit includes resistors R2 and R5, a diode D1, a capacitor C3, a capacitor C4, a diode D1, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6 ...6, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C6, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C6, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C6, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C6, a capacitor C6, a capacitor C7, a capacitor C6, a capacitor The circuit includes diode D2, capacitor C8, and forward button SW3. One end of resistor R2, one end of resistor R5, and one end of capacitor C8 are connected to pin 12 of microcontroller U1. The other end of resistor R5 is connected to the cathode of diode D2, and the anode of diode D2 is connected to pin 2 of forward button SW3. The reverse control circuit includes resistors R3 and R6, diode D3, capacitor C4, and reverse button SW4. One end of resistor R3, one end of resistor R6, and one end of capacitor C4 are connected to pin 14 of microcontroller U1. The other end of resistor R6 is connected to the anode of diode D3, and the anode of diode D3... The negative terminal is connected to pin 2 of the reverse button SW4; the one-button calibration circuit includes resistors R9 and R11, diode D5, capacitor C18, and calibration button SW6. One end of resistor R9, one end of resistor R11, and one end of capacitor C18 are connected to pin 11 of microcontroller U1. The other end of resistor R11 is connected to the positive terminal of diode D5. The negative terminal of diode D5 is connected to pin 2 of the reverse button SW6. The other ends of resistors R1, R2, R3, and R9 are connected to a +3.3V DC power supply. The other end of capacitor C3, capacitor... The other end of capacitor C8, the other end of capacitor C4, the other end of capacitor C18, pin 3 of stop button SW2, pin 3 of forward button SW3, pin 3 of reverse button SW4, and pin 3 of calibration button SW6 are all grounded. Stop button SW2, forward button SW3, reverse button SW4, and calibration button SW6 all use TS665CJ. Among them, calibration button SW6 is used to start the motor calibration program and enable the motor; forward button SW3 starts the motor to rotate forward; reverse button SW6 starts the motor to rotate in reverse; and stop button SW2 stops the motor.

[0010] In another specific embodiment of the present invention, the buzzer circuit includes resistors R12 to R14, diode D6, transistor Q1, and buzzer BUZZER1. One end of resistor R13 is connected to pin 38 of the microcontroller U1, and the other end of resistor R13 is connected to one end of resistor R14 and the base of transistor Q1. The collector of transistor Q1 is connected to the anode of diode D6 and one pin of buzzer BUZZER1. The other pin of buzzer BUZZER1 is connected to one end of resistor R12. The other end of resistor R12 and the cathode of diode D6 are connected to a +5V DC power supply. The other end of resistor R14 and the emitter of transistor Q1 are grounded.

[0011] In another specific embodiment of the present invention, the indicator circuit includes a power indicator circuit and a signal indicator circuit. The power indicator circuit includes a light-emitting diode (LED1) and a resistor R15. One end of the resistor R15 is connected to a +3.3V DC power supply, and the other end of the resistor R15 is connected to the positive terminal of the LED1. The negative terminal of the LED1 is grounded. The signal indicator circuit includes a resistor R16 and a light-emitting diode (LED2). One end of the resistor R16 is connected to pin 15 of the microcontroller U1, and the other end of the resistor R16 is connected to the positive terminal of the LED2. The negative terminal of the LED2 is grounded.

[0012] In another specific embodiment of the present invention, the CAN transceiver circuit includes an Amass connector U6, a DIP switch SW7, a resistor 19, a CAN interface chip U5, fuses F1 and F2, and a bidirectional transient voltage suppression diode D7. The Amass connector U6 is an XT30PW(2+2)-MGB, the DIP switch SW7 is a DSIC01LS-P, the CAN interface chip U5 is a SIT1042AQTK / 3, and the fuse F1 is a pSMD010. Fuse F2 is an nSMD010, and the bidirectional transient voltage suppressor diode D7 is a BST23C242V. Amass connector U6 is used to connect the motor under test. Pin 1 of Amass connector U6 is connected to a +35V DC power supply, and pin 3 and one end of resistor R19 are connected to pin 2 of fuse F2. Pin 1 of fuse F2 and pin 1 of bidirectional transient voltage suppressor diode D7 are connected to pin 6 of CAN interface chip U5. The other end of resistor R19 is connected to one end of DIP switch SW7, and the other end of DIP switch SW7 is connected to pin 4 of Amass connector U6. Pin 2 of fuse F1 is connected to the same circuit. Pin 1 of fuse F1 and pin 2 of bidirectional transient voltage suppressor diode D7 are connected to pin 7 of CAN interface chip U5. Pin 1 of CAN interface chip U5 is connected to pin 26 of microcontroller U1. Pin 4 of CAN interface chip U5 is connected to pin 25 of microcontroller U1. Pin 3 of CAN interface chip U5 is connected to +5V DC power supply. Pin 5 of CAN interface chip U5 is connected to +3.3V DC power supply. Pins 2, 8, and 9 of CAN interface chip U5, pin 2 of Amass connector U6, and pin 3 of bidirectional transient voltage suppressor diode D7 are all grounded.

[0013] In a further specific embodiment of the present invention, the serial port screen circuit includes a pin header H2, which is a PH1250-WT-04. Pin 1 of the pin header H2 is connected to a +5V DC power supply, pin 2 is connected to pin 31 of the microcontroller U1, pin 3 is connected to pin 30 of the microcontroller U1, and pin 4 is grounded. The pin header H2 is plugged into the LCD screen.

[0014] In a further specific embodiment of the present invention, a power management module is also included. The power management module includes a first power conversion circuit and a second power conversion circuit. The first power conversion circuit is used to convert +35V DC power into +5V DC power, and the second power conversion circuit is used to convert +5V DC power into +3.3V DC power.

[0015] In yet another specific embodiment of the present invention, a program programming port is further included, which is connected to the main control MCU unit.

[0016] Due to the adoption of the above-described structure, the present invention has the following beneficial effects compared with the prior art: Firstly, it significantly improves production line testing efficiency. By integrating power supply, control signals, and CAN communication into a single fixture, there is no need to switch between multiple instruments on the test bench, reducing workstation space occupation and operation switching time. The use of a dedicated Amass connector enables plug-and-play connection between the motor and the fixture, eliminating the cumbersome steps of traditional wiring testing; coupled with standardized testing procedures and a quick-connect design, it ensures consistent testing standards for each motor, significantly shortening the testing cycle for individual products.

[0017] Secondly, it enhances fault diagnosis and quality control capabilities. It can display the motor's standby current and temperature rise in real time, and real-time parameter monitoring helps to promptly identify potential defective products. Through a precise error reporting system, it helps production line workers quickly pinpoint the root cause of problems and accelerates the rework process.

[0018] Third, it optimizes the user experience and interaction. Equipped with an intuitive human-machine interface and audio-visual feedback mechanism, it can effectively prevent misoperation in complex industrial environments; at the same time, it is easy to maintain, with a clear modular circuit layout, which facilitates engineers to quickly troubleshoot and repair, reducing production line downtime.

[0019] Fourth, it improves testing stability and safety. The power protection mechanism has been improved to ensure stable operation of the testing equipment in complex industrial power supply environments; CAN bus communication is adopted, providing strong resistance to electromagnetic interference, making it suitable for stable data transmission in production line environments where significant electromagnetic interference is generated during motor startup. Attached Figure Description

[0020] Figure 1 This is a system architecture diagram of the present invention; Figure 2 This is a schematic diagram of the electrical connection of the main control MCU unit described in this invention; Figure 3 This is a schematic diagram of the electrical connection of the first power conversion circuit described in this invention. Figure 4 This is a schematic diagram of the electrical connection of the second power conversion circuit described in this invention. Figure 5 This is a schematic diagram of the electrical connection of the serial port screen circuit described in this invention. Figure 6 This is a schematic diagram of the electrical connection of the buzzer circuit described in this invention. Figure 7 This is a schematic diagram of the electrical connection of the power indicator circuit described in this invention. Figure 8 This is a schematic diagram of the electrical connection of the signal indication circuit described in this invention; Figure 9 This is a schematic diagram of the electrical connection of the CAN transceiver circuit described in this invention. Figure 10This is a schematic diagram of the electrical connection of the stop control circuit described in this invention. Figure 11 This is a schematic diagram of the electrical connection of the forward rotation control circuit described in this invention. Figure 12 This is a schematic diagram of the electrical connection of the inversion control circuit described in this invention. Figure 13 This is a schematic diagram of the electrical connection of the one-click calibration circuit described in this invention. Figure 14 This is a schematic diagram of the electrical connection of the program programming port circuit described in this invention. Figure 15 This is a flowchart of the operation process of the present invention. Detailed Implementation

[0021] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of the present invention should be considered within the scope of protection of the present invention.

[0022] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this invention.

[0023] This invention has functions such as motor performance verification, parameter display, operation control, and fault diagnosis.

[0024] See Figure 1 This invention relates to a testing fixture for a motor production line, comprising a main control MCU unit, an input interaction module and a human-machine interface output module connected to the main control MCU unit, and a power management module. The input interaction module includes a button operation circuit and a CAN transceiver circuit. The button operation circuit includes a stop control circuit, a forward rotation control circuit, a reverse rotation control circuit, and a one-key calibration circuit for the motor. The CAN transceiver circuit is used to communicate with the motor controller, supports the standard CAN protocol, and receives motor status parameters. The human-machine interface output module includes a serial port screen circuit, a buzzer circuit, and an indicator circuit. The serial port screen circuit is connected to an LCD screen, which displays the motor status and test data in real time. The test data includes the motor temperature obtained through the CAN interface, the temperature value collected by a thermistor, and the standby current value collected by a current sensor. The thermistor and current sensor are located on the motor drive board side. The buzzer circuit and indicator circuit provide immediate audible feedback during operation and provide fault alarms when motor abnormalities occur, including motor abnormalities, encoder abnormalities, control abnormalities, and system abnormalities.

[0025] This invention integrates power supply, control signals, and CAN communication into a single fixture through integrated design, eliminating the need to switch between multiple instruments on the test bench, thus reducing workstation space and operation switching time. At the same time, the modular circuit layout is clear, and if the fixture itself malfunctions, engineers can quickly troubleshoot and repair it using the schematic diagram, simplifying maintenance and reducing production line downtime.

[0026] See Figure 2 The main control MCU unit includes a microcontroller U1, a crystal oscillator circuit, and a reset circuit. The microcontroller U1 is an N32G455CCL7. The crystal oscillator circuit includes a crystal X1, capacitors C9 and C20. Crystal X1 is a passive four-pin crystal oscillator. Pin 1 of crystal X1 is connected to one end of capacitor C20 and pin 5 of microcontroller U1. Pin 3 of crystal X1 is connected to one end of capacitor C19 and pin 6 of microcontroller U1. Pins 2 and 4 of crystal X1, the other end of capacitor C19, and the other end of capacitor C20 are all grounded. The reset circuit includes resistors R8 and R10, diode D4, capacitor C17, and reset button SW5. Reset button SW5 uses a TS665CJ chip. One end of resistor R8 is connected to a +3.3V DC power supply. The other end of resistor R8, one end of resistor R10, and one end of capacitor C17 are all connected to pin 7 of microcontroller U1. The other end of resistor R10 is connected to the anode of diode D4. The cathode of diode D4 is connected to pin 2 of reset button SW5. Pin 3 of reset button SW5 and the other end of capacitor C17 are grounded. Reset button SW5 is used to reset the system and clear the current state.

[0027] See Figure 3 and Figure 4 The power management module includes a first power conversion circuit and a second power conversion circuit. The first power conversion circuit includes an interface CN1, a power switch SW1, capacitors C5-C7, and a three-terminal voltage regulator U3. The three-terminal voltage regulator U3 is a 78M05, and the interface CN1 is a WJ2EDGRC-5.08-2P. One end of the power switch SW1 is connected to a +35V DC power supply, and the other end of the power switch SW1 is connected to one end of capacitor C5 and pin 1 of the three-terminal voltage regulator U3. It also provides +35V DC power to the CAN transceiver circuit. The three-terminal voltage regulator U3 converts the +35V DC power supply to a +5V DC power supply. The second power conversion circuit includes a voltage regulator chip U4 and capacitors C21-C23. The voltage regulator chip U4 is an AMS1117-3.3V, used to convert the +5V DC power supply to a +3.3V DC power supply.

[0028] See Figure 5The serial port display circuit includes a pin header H2, which uses a PH1250-WT-04 connector. Pin 1 of pin H2 is connected to a +5V DC power supply, pin 2 is connected to pin 31 of the microcontroller U1, pin 3 is connected to pin 30 of the microcontroller U1, and pin 4 is grounded. Driving the LCD screen through the serial port display circuit enables an intuitive human-machine interface. The LCD screen displays the motor status and test data in real time. By monitoring motor status parameters such as over-temperature and over-current, it determines whether there are any abnormalities. When an abnormality occurs, the LCD screen displays an error message. All key data (current, temperature, status) are clearly displayed, reducing reliance on operator experience.

[0029] See Figure 6 The buzzer circuit includes resistors R12-R14, diode D6, transistor Q1, and buzzer BUZZER1. One end of resistor R13 is connected to pin 38 of microcontroller U1. In this embodiment, the buzzer BUZZER1 is configured to emit a short sound feedback when each operation button is pressed. See [link / reference] Figure 7 and Figure 8 The indicator circuit includes a power indicator circuit and a signal indicator circuit. The power indicator circuit includes a light-emitting diode (LED1) and a resistor R15; the signal indicator circuit includes a resistor R16 and a light-emitting diode (LED2). A buzzer circuit and LED indicators provide immediate operational feedback and fault alarms. Power and signal status are indicated by lights, and the audible and visual feedback effectively prevents misoperation in noisy factory environments.

[0030] See Figure 9The CAN transceiver circuit includes an Amass connector U6, a DIP switch SW7, a resistor 19, a CAN interface chip U5, fuses F1 and F2, and a bidirectional transient voltage suppressor diode D7. The Amass connector U6 is an XT30PW(2+2)-MGB, the DIP switch SW7 is a DSIC01LS-P, used for impedance matching control on the CAN bus, the CAN interface chip U5 is a SIT1042AQTK / 3, fuse F1 is a pSMD010, fuse F2 is an nSMD010, and the bidirectional transient voltage suppressor diode D7 is a BST23C242V. The Amass connector U6 is used to connect the motor under test to a +24V DC power supply. This embodiment uses a dedicated Amass connector U6, enabling plug-and-play connection between the motor and the tooling. The quick connection design reduces the cumbersome steps of traditional wiring tests, making it ideal for fast-paced assembly line operations. Pin 1 of Amass connector U6 is connected to a +35V DC power supply from the power management module. Pin 3 and one end of resistor R19 are connected to pin 2 of fuse F2. Pin 1 of fuse F2 and pin 1 of bidirectional transient voltage suppressor diode D7 are connected to pin 6 of CAN interface chip U5. The other end of resistor R19 is connected to one end of DIP switch SW7. The other end of DIP switch SW7 and pin 4 of Amass connector U6 are connected to pin 2 of fuse F1. Pin 1 of fuse F1 and pin 2 of bidirectional transient voltage suppressor diode D7 are connected to pin 7 of CAN interface chip U5. Pin 1 of CAN interface chip U5 is connected to pin 26 of microcontroller U1, and pin 4 of CAN interface chip U5 is connected to pin 25 of microcontroller U1. The bidirectional transient voltage suppressor diode D7 is used to protect the sensitive CAN interface chip U5 from transient overvoltage shocks and damage. The CAN interface can acquire temperature data from the motor controller and display it on the LCD screen; it can also acquire standby current data from the motor collected by the current sensor and temperature data collected by the thermistor, and display them on the LCD screen. This invention uses CAN bus communication, which has strong anti-electromagnetic interference capabilities, making it suitable for stable data transmission in production line environments where significant electromagnetic interference is generated at motor startup.

[0031] See Figures 10 to 13The button operation circuit includes a stop control circuit, a forward rotation control circuit, a reverse rotation control circuit, and a one-key calibration circuit. The stop control circuit includes resistors R1 and R4, diode D1, capacitor C3, and a stop button SW2. One end of resistor R1, one end of resistor R4, and one end of capacitor C3 are connected to pin 13 of the microcontroller U1. The other end of resistor R4 is connected to the anode of diode D1, and the cathode of diode D1 is connected to pin 2 of the stop button SW2. Resistor R1 is a pull-up resistor, normally at a high level. Capacitor C3 is a debouncing capacitor, forming an RC filter with R1. Resistor R4 is a current-limiting / isolation resistor to prevent accidental overcurrent and enhance circuit safety. Diode D1 is a protection diode, discharging the back EMF of the inductive load or clamping negative voltage to protect the microcontroller from damage by negative spikes. The forward rotation control circuit includes resistors R2 and R5, diode D2, capacitor C8, and a forward rotation button SW3. One end of resistor R2, one end of resistor R5, and one end of capacitor C8 are connected to pin 12 of microcontroller U1. The other end of resistor R5 is connected to the cathode of diode D2, and the anode of diode D2 is connected to pin 2 of the forward rotation button SW3. The reverse rotation control circuit includes resistors R3 and R6, diode D3, capacitor C4, and a reverse rotation button SW4. One end of resistor R3, one end of resistor R6, and one end of capacitor C4 are connected to pin 14 of microcontroller U1. The other end of resistor R6 is connected to the anode of diode D3, and the cathode of diode D3 is connected to pin 2 of the reverse rotation button SW4. The one-button calibration circuit includes resistors R9 and R11, diode D5, capacitor C18, and calibration button SW6. One end of resistor R9, one end of resistor R11, and one end of capacitor C18 are connected to pin 11 of microcontroller U1. The other end of resistor R11 is connected to the positive terminal of diode D5, and the negative terminal of diode D5 is connected to pin 2 of the reverse button SW6. In this embodiment, the stop button SW2, forward button SW3, reverse button SW4, and calibration button SW6 all use TS665CJ. The calibration button SW6 is used to start the motor calibration program and enable the motor; the forward button SW3 starts the motor to rotate forward, and the reverse button SW6 starts the motor to rotate in reverse. In this embodiment, the speed for both forward and reverse rotation is 120 RPM; the stop button SW2 stops the motor.

[0032] See Figure 14 The programmable port circuit includes resistors R17 and R18 and a pin header H1. Pin header H1 is a PZ200V-11-04P. One end of resistor R17 is connected to pin 2 of pin header H1, and the other end is connected to pin 37 of microcontroller U1. One end of resistor R18 is connected to pin 4 of pin header H1, and the other end is connected to pin 34 of microcontroller U1. Pin 1 of pin header H1 is connected to a 3.3V DC power supply, and pin 3 is grounded. The programmable port is used to write the compiled program code into microcontroller U1.

[0033] See Figure 15This embodiment uses the production line test of a 6010 motor as an example to illustrate the specific operation process. Step 1: Power On: Connect a 24V DC power supply to Amass connector U6. Step 2: Motor Calibration: Press the motor calibration button SW6. The system starts the motor calibration program on the motor drive board side. The motor rotates one revolution to the left and one revolution to the right, then stops. Press the calibration button SW6 again to save the configuration and enable the motor. Step 3: Motor Start: Press the forward rotation button SW3 or the reverse rotation button SW4. The motor runs at a speed of 120 RPM. Step 4: Motor Stop: Press the stop button SW2. The motor stops running. If over-temperature, over-current, or other abnormal conditions occur during monitoring, an alarm will be triggered. Step 5: Data Viewing: The LCD screen displays the motor temperature, standby current, and thermistor temperature in real time. Step 6: Troubleshooting: If the LCD screen displays an error message, check the motor status and perform corresponding troubleshooting. After troubleshooting, press the reset button SW5.

[0034] This invention solidifies the test logic (such as a constant speed of 120 RPM) through hardware circuitry, and, combined with a "one-click calibration" function (automatic left and right rotation), eliminates the arbitrariness of manual operation, achieving a standardized testing process. This ensures consistent testing standards for every motor and significantly shortens the testing cycle for individual products. The invention also features real-time parameter monitoring and accurate error reporting capabilities, enhancing fault diagnosis and quality control. Specifically, the tooling incorporates precise current sampling and temperature monitoring functions in its software design, enabling real-time display of the motor's standby current and temperature rise, helping to promptly identify potential "sub-healthy" products (such as overheating due to excessive current). Unlike simple "pass / fail" tests, this tooling possesses intelligent diagnostic capabilities. When an anomaly is detected, it clearly distinguishes and displays specific fault codes (such as "encoder malfunction," "control malfunction," etc.) on the LCD screen, helping production line workers quickly locate the root cause of the problem and accelerate the rework process. The software settings involved in the above functions have been widely disclosed and will not be elaborated upon here.

Claims

1. A testing fixture for a motor production line, characterized in that, The system includes a main control MCU unit, an input interaction module, and a human-machine interaction output module connected to the main control MCU unit. The input interaction module includes a button operation circuit and a CAN transceiver circuit. The button operation circuit includes a stop control circuit, a forward rotation control circuit, a reverse rotation control circuit, and a one-key calibration circuit for the motor. The CAN transceiver circuit is communicatively connected to the motor controller to acquire motor operating parameters. The human-machine interaction output module includes a serial port screen circuit, a buzzer circuit, and an indicator circuit. The serial port screen circuit is connected to the LCD screen, which is used to display the motor status and test data in real time. The test data includes the motor temperature obtained through the CAN interface, the temperature value collected by the thermistor, and the standby current value collected by the current sensor. The buzzer circuit and indicator circuit are used to provide immediate sound feedback during operation and to provide fault alarms when the motor malfunctions. The malfunctions include motor malfunctions, encoder malfunctions, control malfunctions, and system malfunctions.

2. The testing fixture for the motor production line according to claim 1, characterized in that: The main control MCU unit includes a microcontroller U1, a crystal oscillator circuit, and a reset circuit. The microcontroller U1 is an N32G455CCL7. The reset circuit includes resistors R8 and R10, a diode D4, a capacitor C17, and a reset button SW5. The reset button SW5 is a TS665CJ. One end of resistor R8 is connected to a +3.3V DC power supply. The other end of resistor R8, one end of resistor R10, and one end of capacitor C17 are all connected to pin 7 of microcontroller U1. The other end of resistor R10 is connected to the positive terminal of diode D4. The negative terminal of diode D4 is connected to pin 2 of reset button SW5. Pin 3 of reset button SW5 and the other end of capacitor C17 are grounded together. Reset button SW5 is used to reset the system and clear the current state.

3. The testing fixture for the motor production line according to claim 2, characterized in that: The button operation circuit includes a stop control circuit, a forward rotation control circuit, a reverse rotation control circuit, and a one-key calibration circuit. The stop control circuit includes resistors R1 and R4, diode D1, capacitor C3, and a stop button SW2. One end of resistor R1, one end of resistor R4, and one end of capacitor C3 are connected to pin 13 of the microcontroller U1. The other end of resistor R4 is connected to the anode of diode D1, and the cathode of diode D1 is connected to pin 2 of the stop button SW2. The forward rotation control circuit includes resistors R2 and R5, diode D2, capacitor C8, and a one-key calibration circuit. The forward control circuit includes resistors R3 and R6, diode D3, capacitor C4, and the reverse button SW4. One end of resistor R3, one end of resistor R5, and one end of capacitor C8 are connected to pin 12 of microcontroller U1. The other end of resistor R5 is connected to the cathode of diode D2, and the anode of diode D2 is connected to pin 2 of the forward button SW3. Pin 2 of W4; the one-button calibration circuit includes resistors R9 and R11, diode D5, capacitor C18, and calibration button SW6. One end of resistor R9, one end of resistor R11, and one end of capacitor C18 are connected to pin 11 of microcontroller U1. The other end of resistor R11 is connected to the positive terminal of diode D5, and the negative terminal of diode D5 is connected to pin 2 of the reverse button SW6. The other ends of resistors R1, R2, R3, and R9 are connected to a +3.3V DC power supply. The other end of capacitor C3 and capacitor C8 are connected to pin 2 of the reverse button SW6. One end of capacitor C4, the other end of capacitor C18, pin 3 of stop button SW2, pin 3 of forward button SW3, pin 3 of reverse button SW4, and pin 3 of calibration button SW6 are all grounded. Stop button SW2, forward button SW3, reverse button SW4, and calibration button SW6 all use TS665CJ. Among them, calibration button SW6 is used to start the motor calibration program and enable the motor; forward button SW3 starts the motor to rotate forward; reverse button SW6 starts the motor to rotate in reverse; and stop button SW2 stops the motor.

4. The testing fixture for the motor production line according to claim 2, characterized in that: The buzzer circuit includes resistors R12-R14, diode D6, transistor Q1, and buzzer BUZZER1. One end of resistor R13 is connected to pin 38 of the microcontroller U1. The other end of resistor R13 is connected to one end of resistor R14 and the base of transistor Q1. The collector of transistor Q1 is connected to the anode of diode D6 and one pin of buzzer BUZZER1. The other pin of buzzer BUZZER1 is connected to one end of resistor R12. The other end of resistor R12 and the cathode of diode D6 are connected to a +5V DC power supply. The other end of resistor R14 and the emitter of transistor Q1 are grounded.

5. The testing fixture for the motor production line according to claim 2, characterized in that: The indicator circuit includes a power indicator circuit and a signal indicator circuit. The power indicator circuit includes a light-emitting diode (LED1) and a resistor R15. One end of the resistor R15 is connected to a +3.3V DC power supply, and the other end of the resistor R15 is connected to the positive terminal of LED1. The negative terminal of LED1 is grounded. The signal indicator circuit includes a resistor R16 and a light-emitting diode (LED2). One end of the resistor R16 is connected to pin 15 of the microcontroller U1, and the other end of the resistor R16 is connected to the positive terminal of LED2. The negative terminal of LED2 is grounded.

6. The testing fixture for the motor production line according to claim 2, characterized in that: The CAN transceiver circuit includes an Amass connector U6, a DIP switch SW7, a resistor 19, a CAN interface chip U5, fuses F1 and F2, and a bidirectional transient voltage suppression diode D7. The Amass connector U6 is an XT30PW(2+2)-MGB, the DIP switch SW7 is a DSIC01LS-P, the CAN interface chip U5 is a SIT1042AQTK / 3, and the fuse F1 is a pSMD010. Fuse F2 is an nSMD010, and the bidirectional transient voltage suppressor diode D7 is a BST23C242V. Amass connector U6 is used to connect the motor under test. Pin 1 of Amass connector U6 is connected to a +35V DC power supply, and pin 3 and one end of resistor R19 are connected to pin 2 of fuse F2. Pin 1 of fuse F2 and pin 1 of bidirectional transient voltage suppressor diode D7 are connected to pin 6 of CAN interface chip U5. The other end of resistor R19 is connected to one end of DIP switch SW7, and the other end of DIP switch SW7 is connected to pin 4 of Amass connector U6. Pin 2 of fuse F1 is connected to the same circuit. Pin 1 of fuse F1 and pin 2 of bidirectional transient voltage suppressor diode D7 are connected to pin 7 of CAN interface chip U5. Pin 1 of CAN interface chip U5 is connected to pin 26 of microcontroller U1. Pin 4 of CAN interface chip U5 is connected to pin 25 of microcontroller U1. Pin 3 of CAN interface chip U5 is connected to +5V DC power supply. Pin 5 of CAN interface chip U5 is connected to +3.3V DC power supply. Pins 2, 8, and 9 of CAN interface chip U5, pin 2 of Amass connector U6, and pin 3 of bidirectional transient voltage suppressor diode D7 are all grounded.

7. The testing fixture for the motor production line according to claim 2, characterized in that: The serial port screen circuit includes a pin header H2, which uses a PH1250-WT-04. Pin 1 of the pin header H2 is connected to a +5V DC power supply, pin 2 is connected to pin 31 of the microcontroller U1, pin 3 is connected to pin 30 of the microcontroller U1, and pin 4 is grounded. The pin header H2 is plugged into the LCD screen.

8. The testing fixture for the motor production line according to claim 1, characterized in that: It also includes a power management module, which includes a first power conversion circuit and a second power conversion circuit. The first power conversion circuit is used to convert +35V DC power to +5V DC power, and the second power conversion circuit is used to convert +5V DC power to +3.3V DC power.

9. The testing fixture for the motor production line according to claim 1, characterized in that: It also includes a program programming port, which is connected to the main control MCU unit.

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