Water pump motor controller detection tool

Abstract

The utility model provides a kind of water pump motor controller detection tool, belong to electrical engineering and automation technical field.The tool includes support platform, female fixture plate, daughter fixture plate, daughter fixture plate and female fixture plate are horizontally arranged, female fixture plate is set on support platform, daughter fixture is set on female fixture plate, and the spacing of daughter fixture plate and female fixture plate is adjustable, the bottom of daughter fixture plate is provided with adjusting mechanism and multiple probes, probe is vertically set in the bottom of daughter fixture plate, adjusting mechanism is used to drive multiple probes horizontal motion above female fixture plate.The utility model embodiment provided can solve the problem of lower detection efficiency in prior art.

Description

Technical Field

[0001] This utility model relates to the field of electrical engineering and automation technology, and in particular to a testing fixture for a water pump motor controller. Background Technology

[0002] The water pump motor controller is the core circuit board that controls the operation of the water pump motor. Especially in automotive electronic water pumps, it is used to drive the permanent magnet synchronous motor, ensure stable cooling, and prevent automotive components from being damaged by overheating. The testing fixture is a device for testing the controller. It can fix the board under test, connect test points through special probes, simulate dynamic working conditions, collect data such as voltage and current, verify the controller performance, and solve problems such as contact resistance and versatility.

[0003] The water pump motor controller testing fixture consists of a fixture base, positioning fixture, interface adapter components, testing module, control unit, and display and alarm device. The base provides stable support, the positioning fixture secures the controller under test to ensure accurate positioning, the interface adapter components match different controller interfaces to achieve circuit connection, the testing module collects voltage and current signals and operating parameters, the control unit coordinates the work of each component and integrates an operation panel, and the display and alarm device presents the test results and abnormal prompts in real time. In existing technologies, some water pump motor controller testing fixtures have difficulty adapting to multiple controller board models. Due to the large differences in the position and spacing of the interfaces of different models, frequent fixture changes or manual adjustment of the testing position are required for fixed probes, which can easily lead to poor contact, affect testing stability, and ultimately result in low testing efficiency.

[0004] Existing pump motor controller testing fixtures typically use fixed probes for testing, requiring frequent fixture changes or manual adjustment of the testing position, resulting in low testing efficiency. Utility Model Content

[0005] This utility model provides a testing fixture for a water pump motor controller, which can solve the problem of low testing efficiency in the prior art. The technical solution is as follows: A testing fixture for a water pump motor controller, characterized in that it comprises: a support platform, a female fixture plate, and a female fixture plate. Both the sub-clamp plate and the mother clamp plate are arranged horizontally. The mother clamp plate is set on the support platform, and the sub-clamp plate is set on the mother clamp plate. The distance between the sub-clamp plate and the mother clamp plate is adjustable. The bottom of the sub-clamp plate is provided with an adjustment mechanism and multiple probes. The probes are vertically set at the bottom of the sub-clamp plate. The adjustment mechanism is used to drive the multiple probes to move horizontally above the mother clamp plate.

[0006] Optionally, the adjustment mechanism includes a first support plate, a first motor, and a limiting disc. The first motor and the first support plate are disposed at the bottom of the sub-clamp plate. The first support plate has a first cavity inside. The limiting disc is horizontally disposed in the first cavity. The output end of the first motor is connected to the center of the limiting disc. The limiting disc has multiple arc-shaped first grooves. The multiple first grooves are evenly spaced along the circumference of the limiting disc. The bottom of the first support plate has a second groove arranged radially along the limiting disc. The probe passes through the first groove and the second groove.

[0007] Optionally, the probe is provided with a mounting protrusion at its top, and the first cavity is provided with a third groove at its top that matches the mounting protrusion.

[0008] Optionally, a cleaning mechanism is provided between the mother clamp plate and the support platform. The cleaning mechanism includes a drive assembly and a scraper. The scraper abuts against the top surface of the mother clamp plate, and the drive assembly is used to drive the scraper to slide on the top surface of the mother clamp plate.

[0009] Optionally, the cleaning mechanism further includes a second support plate disposed at the bottom of the mother clamp plate. The second support plate has a second cavity inside, and the drive assembly is disposed within the second cavity. The drive assembly includes a second motor, a guide rail, a gear, a rack, a connecting plate, and a sliding frame. The scraper slides on the mother clamp plate in a first direction. The guide rail and the rack are arranged along the first direction. The output end of the second motor is arranged upward. The gear is disposed on the output end of the second motor. The bottom of the second motor is slidably disposed on the guide rail. The gear meshes with the rack. One end of the connecting plate is connected to the second motor, and the other end is connected to the sliding frame. The sliding frame is perpendicular to the first direction and is mounted on the mother clamp plate. The scraper is disposed at the bottom of the crossbeam of the sliding frame.

[0010] Optionally, a slide rail is provided in the second cavity along the first direction, and a fourth slide groove matching the slide rail is provided on one leg of the sliding frame, and the sliding frame is slidably mounted on the slide rail through the fourth slide groove.

[0011] Optionally, a limiting groove is provided on the side of the second support plate near the other leg of the sliding frame, and a limiting rod is provided in the limiting groove along the first direction, and the other leg of the sliding frame is slidably mounted on the limiting rod.

[0012] Optionally, a housing is provided at the bottom of the support platform, a control system is provided inside the housing, and a start button and an emergency stop button are provided on the outside of the housing. The start button and the emergency stop button are respectively connected to the control system, and the control system is respectively connected to the first motor and the second motor.

[0013] Optionally, the support platform is provided with a vertically arranged limiting post, the sub-clamp plate is provided with a sliding hole, the limiting post is slidably disposed in the sliding hole, and the top of the limiting post is provided with a horizontally arranged limiting plate.

[0014] Optionally, the support platform is provided with a plurality of limiting posts, which are arranged in a rectangular array.

[0015] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following: This utility model provides a testing fixture for a water pump motor controller. The support platform provides bottom support for the mother fixture plate. The controller under test is placed on the mother fixture plate. By controlling the sub-fixture plate to move closer to the mother fixture plate, the probe located at the bottom of the sub-fixture plate can contact the measurement point on the controller under test and perform measurement. Since the measurement point positions on different models of controllers under test are different, the position between multiple probes can be adjusted by controlling the adjustment mechanism, so that the probes can adapt to different sizes and models of controllers under test. There is no need to frequently change the fixture or manually adjust the detection position, which can effectively solve the problem of low detection efficiency in the prior art. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the overall structure provided in an embodiment of the present utility model; Figure 3 This is an exploded view of the overall structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the adjustment mechanism provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the cooperation between the sub-clamp plate and the adjustment mechanism provided in this embodiment of the utility model; Figure 6 This is provided by the embodiment of the present utility model. Figure 5 Enlarged view of point A; Figure 7 This is a schematic diagram of the cleaning mechanism structure provided in an embodiment of the present utility model; Figure 8 This is a structural diagram of the overall testing system provided in this embodiment of the utility model; Figure 9 This is a structural diagram of the upper and lower computer control system provided in an embodiment of this utility model; Figure 10 This is a structural diagram of the lower-level machine system provided in an embodiment of this utility model.

[0018] In the diagram: 1-Support platform; 11-Limiting post; 2-Female clamp plate; 3-Female clamp plate; 31-Sliding hole; 4-Adjusting mechanism; 41-First support plate; 411-Second slide groove; 412-Third slide groove; 42-First motor; 43-Limiting disc; 431-First slide groove; 5-Probe; 51-Mounting protrusion; 6-Cleaning mechanism; 61-Drive assembly; 611-Second motor; 612-Guide rail; 613-Gear; 614-Rack; 615-Connecting plate; 616-Sliding frame; 617-Slide rail; 618-Fourth slide groove; 619-Limiting rod; 62-Scraper; 63-Second support plate; 631-Limiting groove; 7-Limiting plate; 8-Box body; 81-Start button; 82-Emergency stop button; 9-Control system. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the overall structure provided in an embodiment of the present utility model; Figure 3 This is an exploded view of the overall structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the internal structure of the adjustment mechanism provided in this embodiment of the utility model; Figure 5 This is a schematic diagram of the cooperation between the sub-clamp plate and the adjustment mechanism provided in this embodiment of the utility model; Figure 6 This is provided by the embodiment of the present utility model. Figure 5 Enlarged view of point A; Figure 7 This is a schematic diagram of the cleaning mechanism structure provided in an embodiment of this utility model. Figures 1 to 7The water pump motor controller testing fixture shown includes: a support platform 1, a female fixture plate 2, and a female fixture plate 3. Both the female fixture plate 2 and the female fixture plate 3 are arranged horizontally. The female fixture plate 2 is set on the support platform 1, and the female fixture plate 3 is set on the female fixture plate 2. The distance between the female fixture plate 3 and the female fixture plate 2 is adjustable. An adjustment mechanism 4 and multiple probes 5 are provided at the bottom of the female fixture plate 3. The probes 5 are vertically set at the bottom of the female fixture plate 3. The adjustment mechanism 4 is used to drive the multiple probes 5 to move horizontally above the female fixture plate 2.

[0021] For example, in this embodiment of the present invention, the support platform 1 serves as the basic load-bearing structure of the entire tooling, used to install and support various components, ensuring overall stability during testing. The mother fixture plate 2 is set on the support platform 1, and the daughter fixture plate 3 is set above the mother fixture plate 2 by a driving device. The distance between the daughter fixture plate 3 and the mother fixture plate 2 can be adjusted. The controller under test is placed on the mother fixture plate 2. When the daughter fixture plate 3 approaches the mother fixture plate 2, the probe 5 will contact the test point on the controller under test. The position between multiple probes 5 can be adjusted by the control adjustment mechanism 4, so that the probes can adapt to controllers under test of different sizes and models. The adjustment mechanism 4 can use one driving source to drive multiple probes 5 to move simultaneously, or it can use multiple driving sources to control the movement of each probe 5 individually. Compared to traditional technologies that use fixed probes for detection and require frequent fixture changes or manual adjustment of the detection position, this embodiment uses an adjustment mechanism 4 to make the positions of multiple probes 5 adjustable to adapt to different models of the controller under test, thereby reducing the time spent on frequent fixture changes or manual adjustment of the detection position and improving detection efficiency.

[0022] This utility model provides a water pump motor controller testing fixture. The support platform 1 provides bottom support for the mother fixture plate 2. The controller to be tested is placed on the mother fixture plate 2. By controlling the sub-fixture plate 3 to move closer to the mother fixture plate 2, the probe 5 located at the bottom of the sub-fixture plate 3 can contact the measurement point on the controller to be tested and perform measurement. Since the measurement point positions on different models of controllers to be tested are different, the position between multiple probes 5 can be adjusted by controlling the adjustment mechanism 4, so that the probes 5 can adapt to different sizes and models of controllers to be tested. There is no need to frequently change the fixture or manually adjust the detection position, which can effectively solve the problem of low detection efficiency in the prior art.

[0023] Optionally, the adjustment mechanism 4 includes a first support plate 41, a first motor 42, and a limiting disc 43. The first motor 42 and the first support plate 41 are disposed at the bottom of the sub-clamp plate 3. The first support plate 41 has a first cavity inside. The limiting disc 43 is horizontally disposed in the first cavity. The output end of the first motor 42 is connected to the center of the limiting disc 43. The limiting disc 43 is provided with a plurality of arc-shaped first sliding grooves 431. The plurality of first sliding grooves 431 are evenly spaced along the circumference of the limiting disc 43. The bottom of the first support plate 41 is provided with a second sliding groove 411 arranged radially along the limiting disc 43. The probe 5 is disposed through the first sliding groove 431 and the second sliding groove 411.

[0024] Exemplary, in embodiments of this utility model, such as Figure 4 As shown, the first motor 42 controls the limiting disk 43 to rotate. Multiple first slide grooves 431 are evenly spaced along the circumference of the limiting disk 43, and multiple second slide grooves 411 are also evenly spaced along the circumference of the limiting disk 43. The second slide grooves 411 are arranged towards the center of the limiting disk 43. A second slide groove 411 is set below each first slide groove 431. Each probe 5 passes through one first slide groove 431 and one second slide groove 411 at the same time. As shown in the figure, the limiting disc 43 is provided with four first sliding grooves 431, and the bottom of the corresponding first support plate 41 is provided with four second sliding grooves 411. Four probes 5 are provided. When the first motor 42 drives the limiting disc 43 to rotate clockwise, each probe 5 is simultaneously restricted by the first and second sliding grooves 431 and 411, causing the distance between the four probes 5 to shrink simultaneously. This accommodates controllers under test with small measurement point spacing. When testing controllers under test with larger measurement point spacing, the limiting disc 43 can be rotated counterclockwise to increase the distance between the four probes 5. During the rotation of the limiting disc 43, the four probes 5 maintain a rectangular array arrangement. When testing controllers with different numbers of measurement points, the first support plate 41 and the limiting disc 43 with different numbers of sliding grooves can be replaced, and different numbers of probes 5 can be installed to accommodate more different models of controllers under test. By setting this structure, the distance between multiple probes 5 can be adjusted simultaneously to adapt to different models of controllers under test, improving the ease of operation of this fixture.

[0025] Optionally, the top of the probe 5 is provided with a mounting protrusion 51, and the top of the first cavity is provided with a third groove 412 that matches the mounting protrusion 51.

[0026] Exemplary, in embodiments of this utility model, such as Figure 5 and Figure 6As shown, by setting a third slide groove 412 at the top of the first cavity, the movement of the probe 5 can be supported. The third slide groove 412 can be set to be consistent with the trajectory of the movement of the probe 5, so that the third slide groove 412 can provide guidance for the movement of the probe 5, thereby making the probe 5 more stable during the movement and improving the structural stability of the tooling.

[0027] Optionally, a cleaning mechanism 6 is provided between the mother clamp plate 2 and the support platform 1. The cleaning mechanism 6 includes a drive assembly 61 and a scraper 62. The scraper 62 abuts against the top surface of the mother clamp plate 2, and the drive assembly 61 is used to drive the scraper 62 to slide on the top surface of the mother clamp plate 2.

[0028] Exemplary, in embodiments of this utility model, such as Figure 7 As shown, the cleaning mechanism 6 can be used to clean the upper surface of the mother fixture plate 2. The drive component 61 drives the scraper 62 to slide on the top surface of the mother fixture plate 2, thereby cleaning the dust and impurities on the upper surface of the mother fixture plate 2, ensuring good contact of the control board under test and avoiding dust and impurities from affecting the contact stability between the controller and the fixture.

[0029] Optionally, the cleaning mechanism 6 further includes a second support plate 63, which is disposed at the bottom of the mother clamp plate 2. The second support plate 63 has a second cavity inside, and the drive assembly 61 is disposed in the second cavity. The drive assembly 61 includes a second motor 611, a guide rail 612, a gear 613, a rack 614, a connecting plate 615, and a sliding frame 616. The scraper 62 slides on the mother clamp plate 2 in a first direction. The guide rail 612 and the rack 614 are arranged along the first direction. The output end of the second motor 611 is arranged upward. The gear 613 is disposed on the output end of the second motor 611. The bottom of the second motor 611 is slidably disposed on the guide rail 612. The gear 613 meshes with the rack 614. One end of the connecting plate 615 is connected to the second motor 611, and the other end is connected to the sliding frame 616. The sliding frame 616 is perpendicular to the first direction and is mounted on the mother clamp plate 2. The scraper 62 is disposed at the bottom of the crossbeam of the sliding frame 616.

[0030] Exemplary, in embodiments of this utility model, such as Figure 7As shown, the scraper 62 slides on the mother clamp plate 2 from the lower left to the upper right, which is the first direction. The rack 614 is fixedly mounted on the side wall of the second cavity along the first direction. By starting the second motor 611 to rotate counterclockwise, the gear 613 also rotates counterclockwise. Since the gear 613 meshes with the rack 614, the gear 613 moves to the lower left along the rack 614, while driving the second motor 611 to move along the guide rail 612. The guide rail 612 provides guidance for the movement of the second motor 611. The connecting plate 615 connects the second motor 611 and the sliding frame 616, so that the second motor 611 drives the sliding frame 616 to move along the first direction. The scraper 62 is located below the crossbeam of the sliding frame 616. By starting the second motor 611 to rotate, the scraper 62 can slide on the surface of the mother clamp plate 2 along the first direction. Correspondingly, by starting the second motor 611 to rotate clockwise, the scraper 62 can be driven to slide in the opposite direction on the mother clamp plate 2, thereby enabling the scraper 62 to reciprocate on the mother clamp plate 2 and clean the mother clamp plate 2. This structure is simple, and cleaning of the upper surface of the mother clamp plate 2 can be achieved simply by starting the second motor 611 to rotate, thus further improving the ease of operation of this tooling.

[0031] Optionally, a slide rail 617 is provided in the first cavity along the first direction, and a fourth slide groove 618 matching the slide rail 617 is provided on one leg of the sliding frame 616. The sliding frame 616 is slidably mounted on the slide rail 617 through the fourth slide groove 618.

[0032] Exemplary, in embodiments of this utility model, such as Figure 7 As shown, by setting the slide rail 617 and the fourth slide groove 618 to cooperate, a guiding force can be provided for the sliding of the sliding frame 616, thereby making the sliding frame 616 more stable when sliding along the first direction, thus further improving the stability of this tooling.

[0033] Optionally, a limiting groove 631 is provided on the side of the second support plate 63 near the other leg of the sliding frame 616. A limiting rod 619 arranged along the first direction is provided in the limiting groove 631, and the other leg of the sliding frame 616 is slidably mounted on the limiting rod 619.

[0034] Exemplary, in embodiments of this utility model, such as Figure 7 As shown, by setting the limiting rod 619, a guiding force can be provided to the sliding of the sliding frame 616 from the other side, thereby making the sliding frame 616 more stable when sliding along the first direction, thus further improving the stability of this tooling.

[0035] Optionally, a housing 8 is provided at the bottom of the support platform 1, a control system 9 is provided inside the housing 8, and a start button 81 and an emergency stop button 82 are provided on the outside of the housing 8. The start button 81 and the emergency stop button 82 are respectively connected to the control system 9, and the control system 9 is respectively connected to the first motor 42 and the second motor 611.

[0036] Exemplary, in embodiments of this utility model, such as Figure 1 As shown, the housing 8 is equipped with multiple start buttons 81, which can control the start of different detection programs. The start buttons 81 are installed on the front side of the housing 8 for easy operation. The start buttons 81 can transmit signals to the control system 9, thereby controlling the start of the first motor 42 and the second motor 611, so that the fixture can perform automated detection. An emergency stop button 82 is fixedly connected to the front side of the housing 8. The emergency stop button 82 is installed on the front side of the housing 8. Pressing it in an emergency can immediately stop the operation of the fixture to ensure safety.

[0037] Optionally, the support platform 1 is provided with a vertically arranged limiting post 11, the sub-clamp plate 3 is provided with a sliding hole 31, the limiting post 11 is slidably arranged in the sliding hole 31, and the top of the limiting post 11 is provided with a horizontally arranged limiting plate 7.

[0038] Exemplary, in embodiments of this utility model, such as Figure 1 As shown, by setting the limiting plate 7, the maximum stroke of the sub-clamp plate 3 moving upward can be limited. By setting the limiting post 11 and the sliding hole 31, the movement of the sub-clamp plate 3 can be guided. With this structure, the operation is simple and the distance between the sub-clamp plate 3 and the mother clamp plate 2 can be stably adjusted, so that the probe 5 can contact the measurement point on the controller under test, thereby further improving the ease of operation of this tooling.

[0039] Optionally, the support platform 1 is provided with multiple limiting posts 11, which are arranged in a rectangular array.

[0040] Exemplary, in embodiments of this utility model, such as Figure 1 As shown, by setting multiple limiting posts 11 and arranging them in a rectangular array, the movement of the sub-clamp plate 3 can be guided more stably, thereby further improving the stability of this tooling.

[0041] For example, this testing fixture is divided into an electromechanical part and a control part during testing. The electromechanical part includes the water pump motor controller board under test, the electronic water pump, and the magnetic powder brake, and is responsible for clamping and measuring the controller board. The control part is responsible for controlling the entire testing process, receiving and processing the measurement results, and determining whether the various indicators of the water pump motor controller board are qualified, and displaying the results graphically on the host computer for the workers to view. The electronic water pump controller board is the object under test (DUT), fixed to the mother fixture board 2 via a dedicated clamping system. The test process is controlled by a lower-level computer to achieve functional circuit testing. The mother fixture board 2 integrates a pneumatic clamping mechanism and a standard interface (DB50 / DB9). The daughter fixture board 3 is compatible with different controller board models and is equipped with precision positioning pins (tolerance ±0.02mm). This mother-daughter fixture assembly is used for accurate positioning and reliable connection of the controller board under test. The pneumatic drive unit is located in the middle of the test bench. The pneumatic cylinder pushes the push plate to clamp / release the PCB, while the solenoid valve controls the pneumatic cylinder's action, ensuring connection stability during testing through pneumatic means. The magnetic powder brake load module is located below the test bench. The magnetic powder brake generates an adjustable load torque through an excitation current (0-1A). (0-300mN·m), the torque sensor monitors the output torque in real time, constructing a multi-operating-point test mode of "constant speed-variable torque" and "constant torque-variable speed" to replace the traditional hydraulic load and achieve accurate electronic load simulation; the torque sensor is located below the support platform 1, between the electronic water pump and the magnetic powder brake, and is used to measure the dynamic load torque applied by the magnetic powder brake to the water pump motor; the host computer interacts with the slave computer through RS485 communication, receives sensor data and performs analysis and processing, realizes test process control, data visualization, test report generation and historical data storage, which is convenient for workers to judge, and saves the data to the database; the probe 5 adopts an eight-claw star crown design with a contact resistance ≤4mΩ to ensure the stability of high current testing.The STM32 controller uses the STM32F103ZET6 as the main control chip. This chip is based on the Cortex-M3 core and has abundant peripheral resources (5 USARTs, 3 SPIs, 2 I2Cs, 12-bit ADC, etc.). It runs the FreeRTOS real-time operating system, enabling multi-task scheduling. In this system, it is mainly responsible for executing test process control, processing sensor data, implementing PI control for the magnetic powder brake and FOC control algorithms for the motor, and communicating with the host computer and the PCB under test. The power supply module includes a 3.3V LDO power supply, a reference voltage source, and 12V / 24V power supplies. The LDO power supply powers the STM32 and its peripheral circuits; the reference voltage source provides a high-precision ADC reference voltage (0.2% accuracy); the power supply powers the magnetic powder actuator and probes, ensuring stable operation of all system modules; the RS485 communication module, based on the SP3485 chip, features a transmission rate of up to 10Mbps, supports the Modbus protocol, and has strong anti-interference capabilities, used for command interaction and data transmission with the host computer; the LIN communication module uses the TJA1027T chip, supports the LIN2.0 / 2.1 protocol, and has a baud rate of 19.2kbps, used for injecting the FOC algorithm into the PCB under test and for diagnostic communication with the controller board; the solenoid valve drive module drives the pneumatic cylinder solenoid valve to automatically press or release the PCB board by outputting control signals via GPIO; the sensor signal acquisition module includes a current sampling module, a speed sampling module, a voltage sampling module, and a torque sensor, with the current sampling module measuring and controlling... The circuit board has a 0-30A phase current, a speed sampling module to collect motor speed signals, a voltage sampling module to collect bus voltage and test point voltage signals from the controller board, and a torque sampling module to measure the dynamic load torque applied to the water pump motor by the magnetic powder brake. The optocoupler isolation module uses a 6N317 optocoupler to isolate the PWM control signal and drive the magnetic powder brake excitation circuit, ensuring safe isolation between high and low voltage circuits. The key input module is designed to work with the start button on the mechanical test bench. When the start button is pressed, this module transmits the button signal to the STM32 controller, which then initiates the test. The magnetic powder brake drive module uses a step-down chopper circuit to convert the STM32's PWM signal into an adjustable DC voltage. By adjusting the excitation current of the magnetic powder brake, the output torque (0~300mN·m) is precisely controlled, providing a programmable mechanical load for the electronic water pump motor and simulating dynamic load changes under actual working conditions.

[0042] At the start of the test, the identification code on the PCB board is scanned, entered into the system, and displayed on the host computer interface; the PCB board is placed in the positioning groove or positioning pin of the female fixture plate 2; the host computer issues a test command, and the test is started through the industrial control computer interface. The command is sent to the STM32 slave computer via the Modbus protocol; pneumatic clamping is started, and the STM32 controls the solenoid valve to drive the cylinder, push the plate to clamp the PCB board, and ensure that the probe 5 is in contact; the sensorless FOC algorithm is injected, and the motor drive algorithm is burned to the PCB board under test through the J.Master downloader via the LIN interface; dynamic load test is performed, and the STM32 controls the magnetic powder brake to gradually increase the load torque; the test point signals during the PCB test process and the speed signal of the water pump motor measured by the rotary encoder are collected; the test is stopped, the magnetic powder brake excitation current is turned off by the STM32 to stop the motor operation, and the pneumatic clamping is released; the PCB is removed, and the test results are observed on the host computer display. In actual use, the automotive electronic water pump controller board testing system allows one worker to complete all the above operations at one workstation, and the testing process only takes 100 seconds, resulting in high testing efficiency and improved testing accuracy. The testing accuracy for bus voltage, current, and motor speed is approximately 2%.

[0043] The electromechanical and control structures employed in this embodiment improve testing accuracy, with bus voltage, current, and motor speed testing accuracy reaching approximately 2%. Furthermore, they enhance versatility and scalability. The hardware interfaces adopt a standardized DB50 / DB9 design, supporting multiple protocols including LIN / BSD / PWM. Sub-clamp probe boards can be quickly replaced; adding new models only requires designing the sub-clamp probe board. Tasks can also be dynamically configured, and the host computer software can configure the testing process without modifying the slave computer code. Finally, the test realism is improved; the magnetic powder brake can simulate the entire operating range of an electronic water pump, increasing dynamic operating condition test coverage from less than 30% in traditional methods to 100%.

[0044] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A testing fixture for a water pump motor controller, characterized in that, include: Support platform (1), female clamp plate (2), female clamp plate (3). The sub-clamp plate (3) and the mother clamp plate (2) are both arranged horizontally. The mother clamp plate (2) is set on the support platform (1), and the sub-clamp plate (3) is set on the mother clamp plate (2). The distance between the sub-clamp plate (3) and the mother clamp plate (2) is adjustable. The bottom of the sub-clamp plate (3) is provided with an adjustment mechanism (4) and multiple probes (5). The probes (5) are vertically set at the bottom of the sub-clamp plate (3). The adjustment mechanism (4) is used to drive the multiple probes (5) to move horizontally above the mother clamp plate (2).

2. The water pump motor controller testing fixture according to claim 1, characterized in that, The adjustment mechanism (4) includes a first support plate (41), a first motor (42), and a limiting disc (43). The first motor (42) and the first support plate (41) are disposed at the bottom of the sub-clamp plate (3). The first support plate (41) has a first cavity inside. The limiting disc (43) is horizontally disposed in the first cavity. The output end of the first motor (42) is connected to the center of the limiting disc (43). The limiting disc (43) has multiple arc-shaped first grooves (431). The multiple first grooves (431) are evenly spaced along the circumference of the limiting disc (43). The bottom of the first support plate (41) has a second groove (411) arranged radially along the limiting disc (43). The probe (5) is disposed through the first groove (431) and the second groove (411).

3. The water pump motor controller testing fixture according to claim 2, characterized in that, The probe (5) is provided with a mounting protrusion (51) at the top, and the first cavity is provided with a third groove (412) that matches the mounting protrusion (51) at the top.

4. The water pump motor controller testing fixture according to claim 3, characterized in that, A cleaning mechanism (6) is provided between the mother clamp plate (2) and the support platform (1). The cleaning mechanism (6) includes a drive assembly (61) and a scraper (62). The scraper (62) abuts against the top surface of the mother clamp plate (2). The drive assembly (61) is used to drive the scraper (62) to slide on the top surface of the mother clamp plate (2).

5. The water pump motor controller testing fixture according to claim 4, characterized in that, The cleaning mechanism (6) further includes a second support plate (63), which is disposed at the bottom of the mother clamp plate (2). The second support plate (63) has a second cavity inside, and the drive assembly (61) is disposed in the second cavity. The drive assembly (61) includes a second motor (611), a guide rail (612), a gear (613), a rack (614), a connecting plate (615), and a sliding frame (616). The scraper (62) slides on the mother clamp plate (2) in a first direction, and the guide rail (612) and the rack (614) are arranged along the first direction. The output end of the second motor (611) is arranged upwards, the gear (613) is set on the output end of the second motor (611), the bottom of the second motor (611) is slidably set on the guide rail (612), the gear (613) meshes with the rack (614), one end of the connecting plate (615) is connected to the second motor (611), and the other end is connected to the sliding frame (616). The sliding frame (616) is perpendicular to the first direction and is mounted on the mother clamp plate (2). The scraper (62) is set at the bottom of the crossbeam of the sliding frame (616).

6. The water pump motor controller testing fixture according to claim 5, characterized in that, A slide rail (617) is provided in the second cavity along the first direction. A fourth slide groove (618) matching the slide rail (617) is provided on one leg of the sliding frame (616). The sliding frame (616) is slidably mounted on the slide rail (617) through the fourth slide groove (618).

7. The water pump motor controller testing fixture according to claim 6, characterized in that, The second support plate (63) has a limiting groove (631) on one side of the other leg of the sliding frame (616). A limiting rod (619) arranged along the first direction is provided in the limiting groove (631). The other leg of the sliding frame (616) is slidably mounted on the limiting rod (619).

8. The water pump motor controller testing fixture according to claim 7, characterized in that, The support platform (1) has a box (8) at its bottom. The box (8) contains a control system (9). The box (8) has a start button (81) and an emergency stop button (82) on its outside. The start button (81) and the emergency stop button (82) are connected to the control system (9) by signals. The control system (9) is connected to the first motor (42) and the second motor (611) by signals.

9. The water pump motor controller testing fixture according to claim 1, characterized in that, The support platform (1) is provided with a vertically arranged limiting post (11), and the sub-clamp plate (3) is provided with a sliding hole (31). The limiting post (11) is slidably arranged in the sliding hole (31), and the top of the limiting post (11) is provided with a horizontally arranged limiting plate (7).

10. A testing fixture for a water pump motor controller according to claim 8, characterized in that, The support platform (1) is provided with multiple limiting posts (11), and the multiple limiting posts (11) are arranged in a rectangular array.

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