Electronic water pump testing device and system

Abstract

This utility model discloses an electronic water pump testing device and system, including a main body of the testing device and a control board, a display board, and a testing fixture disposed within the main body of the testing device. The testing fixture and the display board are both connected to the control board. The control board is used to connect to the test load water circuit, send test signals to the test load water circuit, and send the test state results detected from the test load water circuit to the display board. The display board is used to receive and display the test state results sent by the control board. The testing fixture is used to lead out test pins corresponding to the test state signals of the test state results. The embodiments of this utility model have a high degree of automation, reducing manual operation and shortening testing time. Compared with traditional testing methods, it significantly improves production testing efficiency, requiring only an external power supply and a test load water circuit to complete the system setup, thus improving production testing line changeover efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electronic water pump testing technology, specifically to an electronic water pump testing device and system. Background Technology

[0002] In the production and testing of water pump electrical control PCBAs (PCBA stands for Printed Circuit Board Assembly), there is a lack of highly applicable specialized equipment. Setting up the testing environment requires combining various instruments and equipment, such as power supplies, oscilloscopes, and signal generators, with test fixtures and loads. This is not only extremely cumbersome but also consumes a significant amount of equipment and space. The testing process relies heavily on operators to perform various test procedures and interpret data results, demanding a high level of expertise from the operators.

[0003] Meanwhile, test data relies on subjective judgment by operators, leading to low production testing efficiency. Using customized equipment presents significant challenges due to high development costs and cumbersome after-sales maintenance. Therefore, developing a new testing system to improve production testing efficiency, accuracy, and objectivity is of great importance. Utility Model Content

[0004] This utility model provides an electronic water pump testing device and system, aiming to solve the problem that in the production testing of water pump electronic control PCBA, there is a lack of highly applicable professional equipment. When setting up the testing environment, it is necessary to use a variety of instruments and equipment such as power supply, oscilloscope, signal generator, etc., together with test fixtures and test loads, which is not only extremely complicated to operate, but also requires a high level of professionalism from the operators, resulting in low testing efficiency.

[0005] In a first aspect, this utility model proposes an electronic water pump testing device, comprising: a testing device body and a control board, a display board, and a testing fixture disposed within the testing device body; the testing fixture and the display board are both connected to the control board; the control board is used to connect to the test load water circuit, send test signals to the test load water circuit, and send the test state result detected from the test load water circuit to the display board; the display board is used to receive and display the test state result sent by the control board; the testing fixture is used to lead out a test pin corresponding to the test state signal of the test state result.

[0006] Secondly, this utility model proposes a power consumption testing device, which includes the electronic water pump testing device described in the first aspect above, and further includes a test load water circuit, wherein the test load water circuit is connected to the control board in the electronic water pump testing device.

[0007] Compared with existing technologies, this utility model provides an electronic water pump testing device and system, including a main body of the testing device and a control board, a display board, and a testing fixture disposed within the main body of the testing device. The testing fixture and the display board are both connected to the control board. The control board is used to connect to the test load water circuit, send test signals to the test load water circuit, and send the test state results detected from the test load water circuit to the display board. The display board is used to receive and display the test state results sent by the control board. The testing fixture is used to lead out test pins corresponding to the test state signals of the test state results. The embodiments of this utility model have a high degree of automation, reducing manual operation steps and shortening testing time. Compared with traditional testing methods, it significantly improves production testing efficiency, requiring only an external power supply and a test load water circuit to complete the system setup, thus improving production testing line changeover efficiency. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic block diagram of the electronic water pump testing device provided by this utility model;

[0010] Figure 2 A schematic diagram of the first circuit of the electronic water pump testing device provided by this utility model;

[0011] Figure 3 This is a schematic diagram of the second circuit of the electronic water pump testing device provided by this utility model.

[0012] Figure 4 This is a schematic diagram of the third circuit of the electronic water pump testing device provided by this utility model. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0014] The directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for explanation and understanding of this invention, and not for limiting it. Furthermore, in the accompanying drawings, structures that are similar or identical are indicated by the same reference numerals.

[0015] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0016] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0017] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0018] Please see Figure 1 This is a schematic block diagram of the electronic water pump testing device provided by this utility model. Figure 1 As shown in the figure, the electronic water pump testing device provided in this embodiment of the present invention includes: a testing device body 11 and a control board 12, a display board 13 and a testing fixture 14 disposed within the testing device body 11; the testing fixture 14 and the display board 13 are both connected to the control board 12; the control board 12 is used to connect to the test load water circuit, send test signals to the test load water circuit, and send the test state result detected from the test load water circuit to the display board 13; the display board 13 is used to receive and display the test state result sent by the control board 12; the testing fixture 14 is used to lead out a test pin corresponding to the test state signal of the test state result.

[0019] In this embodiment, when it is necessary to use this electronic water pump testing device to test the test load water circuit, the specific process is as follows:

[0020] 1) Connect the test load water circuit to the corresponding interface (such as the UVW interface) of the control board 12; wherein, the test load water circuit specifically includes a water circulation pipeline and a water pump assembly, and the three-phase UVW line of the load water pump motor of the water pump assembly is connected to the corresponding interface of the control board.

[0021] 2) The control board 12 outputs (PWM combination sequence, PWM stands for Pulse Width Modulation) to the water pump assembly of the test load water circuit according to the preset control logic;

[0022] 3) The water pump operation information of the water pump assembly of the test load water circuit is received by the control board 12 and compared with the preset control logic output (corresponding to the expected working state, i.e., PWM combination sequence), and the FO status (FO stands for Fail to Open) and other information fed back by the water pump assembly are read synchronously.

[0023] 4) The control board 12 compares the water pump operation information of the water pump assembly with the expected operating state, and sends the feedback FO status and other information as the measured state results to the display board 13 for display. It can also provide prompts through the buzzer sound on the display board 13. More specifically, the control board 12 can also determine whether the load water pump motor operates according to the received preset control logic output target command by collecting the phase current magnitude and frequency of the load water pump motor of the water pump assembly.

[0024] 5) When the test pins on the test fixture 14 are connected to a test signal detection device (such as an oscilloscope), the key signals of the test load water circuit can be extracted using the test pins, such as the positive and negative terminals of the input power supply, the input control PWM signal, the PCBA status feedback FO signal, and the motor UWV three-phase inverter drive signal. The test pins on the test fixture 14 serve as test points for extracting power and signals. They are connected to the control board 12 through leads with current-compatible wire diameters, and the control board 12 performs signal acquisition or test command distribution.

[0025] As can be seen, the aforementioned electronic water pump testing device boasts a high degree of automation, reducing manual operation and shortening testing time. Compared to traditional testing methods, it significantly improves production testing efficiency, requiring only an external power supply and a test load water circuit to complete system setup, thus enhancing production testing line changeover efficiency.

[0026] In one embodiment, such as Figure 1As shown, the control board 12 includes an MCU chip unit 121, a power input interface 122, a power high-side switch circuit 123, an auxiliary power supply 124, a voltage detection and protection circuit 125, a phase current sampling circuit 126, an interface circuit 127, and a UVW interface 128. The power input interface 122 is used to connect to the power supply and is also connected to the power high-side switch circuit 123 and the auxiliary power supply 124. The power high-side switch circuit 123 is also connected to the voltage detection and protection circuit 125 and the test fixture 14. The voltage detection and protection circuit 125 and the auxiliary power supply 124 are also connected to the MCU chip unit 121. The phase current sampling circuit 126 is connected to the MCU chip unit 121 and the UVW interface 128. The interface circuit 127 is connected to the MCU chip unit 121 and the test fixture 14. The UVW interface 128 is also connected to the test fixture 14.

[0027] In this embodiment, after the core circuit interface described above is specifically set in the control board 12, a power high-side switch circuit 123 is integrated on the power supply line, and the output current is detected by the phase current sampling circuit 126 to realize pre-charge, overcurrent, and overvoltage protection functions. Moreover, when the power supply output from the control board 12 to the test fixture experiences overcurrent, overvoltage, or a fault in the PCBA under test, or when the "handle opening / closing status detection button" of the test fixture 14 is in a non-test state, the output power can be cut off to ensure the safety of testing and operation.

[0028] In one embodiment, such as Figure 1 and Figure 2 As shown, the power input interface 122 includes a first diode D1 and a first interface J1; the power high-side switching circuit 123 includes a first MOSFET Q1, a second MOSFET Q2, a first transistor Q3, a second transistor Q4, a third transistor Q5, a first capacitor C1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and an AND gate integrated circuit U2; the anode of the first diode D1 is grounded, and the cathode of the first diode D1 is connected to the power supply; pins 1, 2, 3, and 4 of the first interface J1 are all grounded, and pins 5 and 6 of the first interface J1 are connected to the power supply.

[0029] The drain of the first MOSFET Q1 is connected to the power supply, the source of the first MOSFET Q1 is connected to the drain of the second MOSFET Q2, and the gate of the first MOSFET Q1 is connected to the second terminal of the first capacitor C1, the second terminal of the first resistor R1, the gate of the second MOSFET Q2, and the collector of the second transistor Q4. The first terminal of the first capacitor C1, the second terminal of the first resistor R1, and the drain of the second MOSFET Q2 are all grounded. The first terminal of the second resistor R2 is connected to the power supply. The second terminal is connected to the base of the first transistor Q3 and the emitter of the second transistor Q4; the first terminal of the third resistor R3 is connected to the power supply, the second terminal of the third resistor R3 is connected to the collector of the first transistor Q3, the base of the second transistor Q4 and the first terminal of the fourth resistor R4; the second terminal of the fourth resistor R4 is connected to the collector of the third transistor Q5; the base of the third transistor Q5 is connected to the 2Y pin of the AND gate integrated circuit U2 through the fifth resistor R5, and the emitter of the third transistor Q5 is grounded.

[0030] In this embodiment, the first diode D1 in the power input interface 122 is specifically model SM8S36CA, the first interface J1 is specifically model CON6A, and the AND gate integrated circuit U2 is specifically model CD4081B. When the above power input interface is used, the input power of the power supply can be effectively processed and provided to the various electrical components in the electronic water pump test device.

[0031] In one embodiment, such as Figure 1 and Figure 2 As shown, the control board 12 further includes a power output interface 129; the power output interface 129 includes a second interface J2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a second capacitor C2, and a second diode D2; the first and second pins of the second interface J2 are connected to the source of the second MOSFET Q2; the third, fourth, fifth, and sixth pins of the second interface J2 are grounded through the sixth resistor R6, and are also connected to the first terminal of the second capacitor C2 and the phase current sampling circuit 126, and to the negative terminal of the second diode D2; the second terminal of the second capacitor C2 is grounded and is also connected to the phase current sampling circuit 126; the first terminal of the seventh resistor R7 is connected to the source of the second MOSFET Q2, and the second terminal of the seventh resistor R7 is connected to the positive terminal of the second diode D2; the first terminal of the eighth resistor R8 is connected to the source of the second MOSFET Q2, and the second terminal of the eighth resistor R8 is grounded through the ninth resistor R9.

[0032] In this embodiment, the specific model of the second interface J2 in the power output interface 129 is CON6A. When the power output interface with the above specific circuit structure is adopted, the processed voltage can be effectively provided to each power-consuming component in the electronic water pump test device.

[0033] In one embodiment, such as Figure 1 and Figure 2 As shown, the voltage detection and protection circuit 125 includes a voltage detection circuit and an overvoltage detection circuit; the voltage detection circuit includes a tenth resistor R10, an eleventh resistor R11, and a third capacitor C3; the overvoltage detection circuit includes a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a fourth capacitor C4, a fifth capacitor C5, and a first voltage comparator Comp1; the phase current sampling circuit 126 includes a sixth capacitor C6, a seventh capacitor C7, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a first operational amplifier TP1, and a second operational amplifier TP2;

[0034] The first end of the tenth resistor R10 is connected to the power supply, and the second end of the tenth resistor R10 is grounded through the eleventh resistor R11; the first end of the third capacitor C3 is connected to the power supply, and the second end of the third capacitor C3 is grounded.

[0035] The first end of the twelfth resistor R12 is connected to the power supply; the second end of the twelfth resistor R12 is connected to the positive input terminal of the first voltage comparator Comp1, the first end of the thirteenth resistor R13, and the first end of the fourth capacitor C4; the second ends of the thirteenth resistor R13 and the fourth capacitor C4 are both grounded; the first ends of the fourteenth resistor R14, the fifth capacitor C5, and the fifteenth resistor R15 are all connected to the negative input terminal of the first voltage comparator Comp1; the second ends of the fourteenth resistor and the fifth capacitor C5 are both grounded; the second end of the fifteenth resistor R15 and the output terminal of the first voltage comparator Comp1 are both connected to pin 1A of the AND gate integrated circuit U2; the first end of the sixteenth resistor R16 is connected to the power supply, and the second end of the sixteenth resistor R16 is connected to the negative input terminal of the first voltage comparator Comp1.

[0036] The first end of the seventeenth resistor R17 is connected to the power supply; the second end of the seventeenth resistor R17 is grounded through the eighteenth resistor R18 and is also connected to the positive input terminal of the first operational amplifier TP1; the sixth capacitor C6 is connected in parallel with the eighteenth resistor R18; the negative input terminal and the output terminal of the first operational amplifier TP1 are both connected to the first end of the nineteenth resistor R19; the second end of the nineteenth resistor R19 is connected to the positive input terminal of the second operational amplifier TP2; the first end of the twentieth resistor R20 is connected to the first end of the second capacitor C2, and the second twentieth resistor R20... The second terminal is connected to the positive input terminal of the second operational amplifier TP2; the first terminal of the eleventh resistor R21 is connected to the second terminal of the second capacitor C2, and the second terminal of the eleventh resistor R21 is connected to the negative input terminal of the second operational amplifier TP2; the output terminal of the second operational amplifier TP2 is connected to the first terminal of the twelfth resistor R22; the second terminal of the twelfth resistor R22 is connected to the negative input terminal of the second operational amplifier TP2; the first terminal of the thirteenth resistor R23 is connected to the output terminal of the second operational amplifier TP2; the second terminal of the thirteenth resistor R23 is grounded through the seventh capacitor C7.

[0037] In this embodiment, the first voltage comparator Comp1 is specifically model LMV393, the first operational amplifier TP1 is specifically model TP10-2-SR, and the second operational amplifier TP2 is specifically model TP10-2-SR. By employing the voltage detection and protection circuit with the above-described specific circuit structure, overcurrent and overvoltage conditions in the power supply output to the test fixture can be detected, allowing the control board to promptly cut off the output power supply, ensuring the safety of testing and operation.

[0038] In one embodiment, such as Figures 1-3 As shown, the MCU chip unit includes an MCU chip U1, a third interface J3, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, a thirty-second resistor R32, a thirty-third resistor R33, a thirty-fourth resistor R34, a thirty-fifth resistor R35, a thirty-sixth resistor R36, a thirty-seventh resistor R37, a thirty-eighth resistor R38, a thirty-ninth resistor R39, a fortieth resistor R40, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a first dual diode D3, a second dual diode D4, and a third dual diode D5;

[0039] The first end of the 24th resistor R24 ​​is connected to the interface circuit 127, and the second end of the 24th resistor R24 ​​is connected to the first pin of the MCU chip U1; the first end of the 25th resistor R25 is connected to the interface circuit 127, and the second end of the 25th resistor R25 is connected to the second pin of the MCU chip U1; the first end of the 26th resistor R26 is connected to the interface circuit 127, and the second end of the 26th resistor R26 is connected to the third pin of the MCU chip U1; the first end of the eighth capacitor C8 is grounded, and the second end of the eighth capacitor C8 is connected to the VDD pin of the MCU chip U1; the first end of the 27th resistor R27 is connected to the power supply... The power supply is connected as follows: the second terminal of the 27th resistor R27 is grounded through the 9th capacitor C9; the first terminal of the 28th resistor R28 is grounded, and the second terminal of the 28th resistor R28 is connected to the TRST pin of the MCU chip U1; the first terminal of the 29th resistor R29 is connected to the first terminal of the 11th resistor R11, and the second terminal of the 29th resistor R29 is connected to the first terminal of the first dual diode D3; the first terminal of the 30th resistor R30 is connected to the first terminal of the 9th resistor R9, and the second terminal of the 30th resistor R30 is connected to the second dual diode D4; the first terminal of the 10th capacitor C10 is connected to the ADCA0 pin of the MCU chip U1, and the 10th capacitor... The second terminal of capacitor C10 is grounded; the first terminal of the eleventh capacitor C11 is connected to the ADCA1 pin of the MCU chip U1, and the second terminal of the eleventh capacitor C11 is grounded; the ADCA3 pin of the MCU chip U1 is connected to the interface circuit 127; the second terminal of the first dual diode D3 is connected to the VDDA pin of the MCU chip U1, both ends of the twelfth capacitor C12, the second terminal of the second dual diode D4, and the first terminal of the third dual diode D5; the second terminal of the second dual diode D4 is also grounded; the first terminal of the thirty-first resistor R31 is connected to the second terminal of the twenty-third resistor R23, and the second terminal of the thirty-first resistor R31 is connected through the thirteenth capacitor C13. Ground; the first end of the thirty-second resistor R32 is connected to the interface circuit 127, the second end of the thirty-second resistor R32 is connected to the first end of the fourteenth capacitor C14 and is also connected to the ADCB3 pin of the MCU chip U1; the first end of the thirty-third resistor R33 is connected to the first end of the thirty-second resistor R32, and the second end of the thirty-third resistor R33 is grounded; the second end of the fourteenth capacitor C14 is grounded; the second end of the third dual diode D5 is connected to the ADCB3 pin of the MCU chip U1; the first end of the thirty-fourth resistor R34 is connected to the power supply, and the second end of the thirty-fourth resistor R34 is connected to the PWM3A pin of the MCU chip U1;The PWM3A pin of the MCU chip U1 is also connected to the 2B pin of the AND gate integrated circuit U2; the ECAP / GPIO24 pin of the MCU chip U1 is connected to the interface circuit 127; the GPIO21 pin of the MCU chip U1 is connected to the 4A pin of the AND gate integrated circuit U2; the PWM1A pin and GOIO11 pin of the MCU chip U1 are connected to the interface circuit 127; the PWM3B pin of the MCU chip U1 is connected to the 2B pin of the AND gate integrated circuit U2; the first end of the thirty-fifth resistor R35 is connected to the third pin of the third interface J3; the second end of the thirty-fifth resistor R35 is connected to the TDI pin of the MCU chip U1; the first end of the thirty-sixth resistor R36 is connected to the seventh pin of the third interface J3; the second end of the thirty-sixth resistor R36 is connected to the TDO pin of the MCU chip U1; the first end of the thirty-seventh resistor R37 is connected to the first pin of the third interface J3; the third end of the thirty-seventh resistor R37 is connected to the first pin of the third interface J3; the third end of the thirty-seventh resistor R37 is connected to the first pin of the third interface J3; the third end of the thirty-seventh resistor R37 is connected to the 4A pin of the AND gate integrated circuit U2; the first end of the thirty-fifth resistor R35 is connected to the third pin of the third interface J3; the second ... The first end of the 38th resistor R38 is connected to the 11th pin of the third interface J3, and the second end of the 38th resistor R38 is connected to the TCK pin of the MCU chip U1; the first end of the 39th resistor R39 is connected to the power supply, and the second end of the 39th resistor R39 is connected to the TDO pin of the MCU chip U1; the GPIO8, GPIO17, 31, and RXD pins of the MCU chip U1 are connected to the interface circuit 127; the PWM2A pin of the MCU chip U1 is connected to the display board 13; the first end of the 40th resistor R40 is connected to the TRST pin of the MCU chip U1, and the second end of the 40th resistor is connected to the 2nd pin of the third interface J3; the first end of the 15th capacitor C15 is connected to the power supply, and the second end of the 15th capacitor C15 is grounded; the 4th, 10th, 12th, and 14th pins of the third interface J3 are all grounded.

[0040] In this embodiment, the specific model of MCU chip U1 is TMS320F28034PAGQR, the specific model of third interface J3 is CON14A, and the specific models of the first dual diode D3, the second dual diode D4, and the third dual diode D5 are all BAT54S (a type of non-polar diode used for clamping or protection in circuits). As the core component of control board 12, it first outputs the preset control logic to the water pump assembly of the test load water circuit; then, the water pump operation information of the water pump assembly of the test load water circuit is received by control board 12 and compared with the preset control logic output, and the FO status (FO stands for Fail to Open) and other information fed back by the water pump assembly are read synchronously; finally, control board 12 sends the comparison result of the water pump operation information of the water pump assembly with the expected operating state, and the feedback FO status and other information as the test state result to the display board for display.

[0041] In one embodiment, such as Figures 1-4As shown, the interface circuit 127 includes a fourth interface J4, a fifth interface J5, a fourth transistor Q6, a fifth transistor Q7, a sixth transistor Q10, a seventh transistor Q11, an eighth transistor Q12, a ninth transistor Q13, a third MOSFET Q8, a fourth MOSFET Q9, a third diode D6, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a forty-first resistor R41, a forty-second resistor R42, a forty-third resistor R43, a forty-fourth resistor R44, a forty-fifth resistor R45, a forty-sixth resistor R46, a forty-seventh resistor R47, a forty-eighth resistor R48, a forty-ninth resistor R49, a fiftieth resistor R50, and a fifty-first resistor. Resistors R51, R52, R53, R54, R55, R55, R56, R57, R57, R58, R59, R59, R60, and R61; the first terminal of the forty-first resistor R41 is connected to pin 4Y of the AND gate integrated circuit U2, and the second terminal of the forty-first resistor R41 is connected to the base of the fourth transistor Q6; the emitter of the fourth transistor Q6 is grounded, and the collector of the fourth transistor Q6 is connected to the second terminal of the forty-fourth resistor R44; the first terminal of the forty-third resistor R43 is connected to the power supply. The second terminal of resistor R43 (43rd) is connected to the gate of the third MOSFET Q8 and the first terminal of resistor R44 (44th); the drain of the third MOSFET Q8 is connected to the power supply, and the source of the third MOSFET Q8 is connected to the first terminal of resistor R45 (45th); the first terminal of resistor R42 (42nd) is connected to pin 4Y of the AND gate integrated circuit U2, and the second terminal of resistor R42 (42nd) is connected to the base of transistor Q7 (5th); the collector of transistor Q7 (5th) is connected to the first terminal of resistor R47 (47th), the first terminal of resistor R48 (48th), and the second terminal of resistor R49 (49th); the fifth transistor... The emitter of transistor Q7 is grounded; the second terminal of the forty-seventh resistor R47 is connected to the gate of the fourth MOSFET Q9; the second terminal of the forty-eighth resistor R48 is grounded; the first terminal of the forty-ninth resistor R49 is connected to the power supply; the drain of the fourth MOSFET Q9 is connected to the first terminal of the forty-sixth resistor R46, and the source of the fourth MOSFET Q9 is grounded; the second terminals of the forty-fifth resistor R45 and the forty-sixth resistor R46 are connected to the cathode of the third diode D6, and also to pins 5 and 6 of the fourth interface J4; the anode of the third diode D6 is grounded; pins 3 and 4 of the fourth interface J4 are grounded.The first end of the fiftieth resistor R50 is connected to the ECAP / GPIO24 pin of the MCU chip U1, and the second end of the fiftieth resistor R50 is connected to the first end of the fifty-first resistor R51 and the collector of the sixth transistor Q10; the second end of the fifty-first resistor R51 is grounded; the first end of the sixteenth capacitor C16 is connected to the ECAP / GPIO24 pin of the MCU chip U1, and the second end of the sixteenth capacitor C16 is grounded; the emitter of the sixth transistor Q10 is connected to the power supply, and the base of the sixth transistor Q10 is connected to the second end of the fifty-second resistor R52 and the first end of the fifty-third resistor R53; the fifty-second resistor R52... The first terminal is connected to the power supply; the second terminal of the fifty-third resistor R53 is connected to the collector of the seventh transistor Q11; the emitter of the seventh transistor Q11 is grounded; the first terminal of the seventeenth capacitor C17 is connected to the base of the seventh transistor Q11, and the second terminal of the seventeenth capacitor C17 is grounded; the fifty-fourth resistor R54 is connected in parallel with the seventeenth capacitor C17; the first terminal of the fifty-fifth resistor R55 is connected to the base of the seventh transistor Q11, and the second terminal of the fifty-fifth resistor R55 is connected to the first terminal of the fifty-sixth resistor R56 and the emitter of the eighth transistor Q12; the fifty-sixth resistor R56... The second terminal is connected to the emitter of the ninth transistor Q13 and the base of the eighth transistor Q12; the collector of the eighth transistor Q12 and the base of the ninth transistor Q13 are both connected to the second terminal of the fifty-ninth resistor R59; the first terminal of the fifty-ninth resistor R59 is connected to the collector of the ninth transistor Q13, the first terminal of the eighteenth capacitor C18, and the first terminal of the fifty-seventh resistor R57; the second terminal of the eighteenth capacitor C18 is grounded; the second terminals of the fifty-seventh resistor R57 and the fifty-eighth resistor R58 are both connected to the first pin of the fourth interface J4; the first terminal of the fifty-eighth resistor R58 is grounded; the first and second pins of the fifth interface J5 are both connected to the emitter of the ninth transistor Q13 and the base of the eighth transistor Q12; the collector of the eighth transistor Q12 and the base of the ninth transistor Q13 are both connected to the second terminal of the fifty-ninth resistor R59; the collector of the eighth transistor Q12 and the base of the ninth transistor Q13 are both connected to the second terminal of the fifty-seventh resistor R59 and the base of the fifty-seventh resistor R58 ... are both connected to the first pin of the fourth interface J4; the collector of the eighth transistor Q12 and the base of the ninth transistor Q13 are both connected to the second terminal of the fifth transistor Q12 and the base of the ninth transistor Q13 are both connected to the second terminal of the fifth transistor Q12 and the base of the ninth transistor Q13 are both connected to the second terminal of the fifth transistor Q12 and the base of the ninth transistor Q13 are both connected to the second terminal of the fifth transistor Q12 and the base of the ninth transistor Q13 are both connected to the second terminal of the fifth transistor Q1 The 60th resistor R60 and the 61st resistor R61 are connected in parallel to the power supply; pin 3 of the fifth interface J5 is grounded; pin 5 of the fifth interface J5 is connected to the first end of the 25th resistor R25; pin 7 of the fifth interface J5 is connected to the PWM1A pin of the MCU chip U1; pin 9 of the fifth interface J5 is connected to the GPIO11 pin of the MCU chip U1; pin 11 of the fifth interface J5 is connected to the GPIO8 pin of the MCU chip U1; pin 13 of the fifth interface J5 is connected to the first end of the 32nd resistor R32; pin 6 of the fifth interface J5 is connected to the first end of the 24th resistor.Pin 8 of the fifth interface J5 is connected to the first end of the 26-pin resistor; pin 10 of the fifth interface J5 is connected to pin GPIO17 of the MCU chip U1; pin 12 of the fifth interface J5 is connected to pin RXD of the MCU chip U1; pin 14 of the fifth interface J5 is connected to pin 31 of the MCU chip U1.

[0042] In this embodiment, the interface circuit 127 includes a fourth interface J4 specifically model CON6A and a fifth interface J5 specifically model CON14A. Through the interface circuit with the above specific circuit interfaces, the relevant signals in the control board can be output to the test fixture so that the detection equipment connected to the test pin can measure the corresponding signals.

[0043] In one embodiment, such as Figures 1-4 As shown, the test fixture 14 includes a test handle; the test handle includes a sixth interface J6, a fourth dual diode D7, a nineteenth capacitor C19, a sixty-second resistor R62, a sixty-third resistor R63, and a sixty-fourth resistor R64; the second pin of the sixth interface J6 is connected to the second end of the sixty-second resistor R62, the first end of the sixty-third resistor R63, and the first end of the sixty-fourth resistor R64; the first end of the sixty-second resistor R62 is connected to the power supply; the second end of the sixty-third resistor R63 is connected to the first end of the fourth dual diode D7, and also to the first end of the nineteenth capacitor C19 and pin 1B of the AND gate integrated circuit U2; the second end of the sixty-fourth resistor R64 is grounded; the second end of the nineteenth capacitor C19 is grounded; the second end of the fourth dual diode D7 is connected to the power supply and is also grounded.

[0044] In this embodiment, the test fixture 14 includes a test handle for opening the test ejector pin's movable flap to allow for changing the test load water circuit for testing. Furthermore, the test fixture 14 is also equipped with a test button for receiving a test start command; and a handle opening / closing status detection button for feeding back the current test handle status information to the control board. The control board can automatically detect the fixture status based on this button feedback. Moreover, the test fixture can be designed as a control compartment, on which both the control board and display board can be fixed.

[0045] In one embodiment, such as Figures 1-4As shown, the display panel 13 includes a buzzer circuit; the buzzer circuit includes a buzzer LS1, a sixty-fifth resistor R65, a sixty-sixth resistor R66, a sixty-seventh resistor R67, and a thirteenth transistor Q14; the first end of the sixty-fifth resistor R65 is connected to the PWM2A pin of the MCU chip U1, and the second end of the sixty-fifth resistor R65 is connected to the base of the thirteenth transistor Q14 and the first end of the sixty-seventh resistor R67; the emitter of the thirteenth transistor Q14 and the second end of the sixty-seventh resistor R67 are grounded; the collector of the thirteenth transistor Q14 is connected to the buzzer LS1; the first end of the sixty-sixth resistor R66 is connected to the power supply, and the second end of the sixty-sixth resistor R66 is connected to the buzzer LS1.

[0046] In this embodiment, when the buzzer circuit with the above specific circuit structure is used, it receives instruction information from the control board to display the test results and provides a prompt through a buzzing sound.

[0047] It can be seen that the electronic water pump testing device in this embodiment of the present invention has the following beneficial effects:

[0048] 1. Improved testing efficiency, i.e., high degree of automation, reducing manual operation and shortening testing time. Compared with traditional testing methods, it significantly improves production testing efficiency. The system can be set up by simply connecting an external power supply and a test load water circuit, improving production test line changeover efficiency;

[0049] 2. Enhance the accuracy and objectivity of testing, namely, the control board automatically compares multiple status information for evaluation, avoiding errors caused by human subjective judgment, and making the test results more accurate and objective;

[0050] 3. Easy to operate, with integrated design of testing fixtures and simple and easy-to-understand operation interface, equipped with test buttons, test handles and handle opening and closing status detection buttons, reducing the professional requirements of operators.

[0051] 4. Cost advantage: No need to customize expensive professional equipment, reducing development costs, and relatively simple maintenance, reducing after-sales maintenance costs;

[0052] 5. Small space occupation, i.e. high system integration. Except for the water circuit components that need to be adjusted, other components are integrated into one environment, which greatly reduces the space occupied compared to the traditional test environment setup.

[0053] This utility model also provides an electronic water pump testing system, which includes the electronic water pump testing device as described in the foregoing embodiments, and further includes a test load water circuit, wherein the test load water circuit is connected to the control board in the electronic water pump testing device.

[0054] In this embodiment, specific reference is made. Figure 1 When the electronic water pump testing system performs automatic testing, the specific process is as follows:

[0055] 11) Connect the test load water circuit to the corresponding interface (such as the UVW interface) of the control board 12; wherein, the test load water circuit specifically includes a water circulation pipeline and a water pump assembly, and the three-phase UVW line of the load water pump motor of the water pump assembly is connected to the corresponding interface of the control board.

[0056] 12) The control board 12 outputs (PWM combination sequence, PWM stands for Pulse Width Modulation) to the water pump assembly of the test load water circuit according to the preset control logic;

[0057] 13) The water pump operation information of the water pump assembly of the test load water circuit is received by the control board 12 and compared with the preset control logic output (corresponding to the expected working state, i.e., the PWM combination sequence), and the FO status (FO stands for Fail to Open) and other information fed back by the water pump assembly are read synchronously.

[0058] 14) The control board 12 compares the water pump operation information of the water pump assembly with the expected operation status, and sends the feedback FO status and other information as the measured status results to the display board 13 for display. It can also provide prompts through the buzzer sound on the display board 13. More specifically, the control board 12 can also determine whether the load water pump motor operates according to the received preset control logic output target command by collecting the phase current magnitude and frequency of the load water pump motor of the water pump assembly.

[0059] 15) When the test pins on the test fixture 14 are connected to a test signal detection device (such as an oscilloscope), the key signals of the test load water circuit can be extracted using the test pins, such as the positive and negative terminals of the input power supply, the input control PWM signal, the PCBA status feedback FO signal, the motor UWV three-phase inverter drive signal, etc.; the test pins on the test fixture 14 serve as test points for extracting power and signals, and are connected to the control board 12 through leads with current-compatible wire diameters, and the control board 12 performs signal acquisition or test command allocation.

[0060] As can be seen, the aforementioned electronic water pump testing device boasts a high degree of automation, reducing manual operation and shortening testing time. Compared to traditional testing methods, it significantly improves production testing efficiency, requiring only an external power supply and a test load water circuit to complete system setup, thus enhancing production testing line changeover efficiency.

[0061] This utility model provides an electronic water pump testing device and system, including a main body of the testing device and a control board, a display board, and a testing fixture disposed within the main body of the testing device. The testing fixture and the display board are both connected to the control board. The control board is used to connect to the test load water circuit, send test signals to the test load water circuit, and send the test state results detected from the test load water circuit to the display board. The display board is used to receive and display the test state results sent by the control board. The testing fixture is used to lead out test pins corresponding to the test state signals of the test state results. The embodiments of this utility model have a high degree of automation, reducing manual operation and shortening testing time. Compared with traditional testing methods, it significantly improves production testing efficiency, requiring only an external power supply and a test load water circuit to complete the system setup, thus improving production testing line changeover efficiency.

[0062] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An electronic water pump testing device, characterized in that, The device includes a main body and a control board, a display board, and a test fixture disposed within the main body. The test fixture and the display board are both connected to the control board. The control board is used to connect to the test load water circuit, send test signals to the test load water circuit, and send the measured state results detected from the test load water circuit to the display board. The display board is used to receive and display the measured state results sent by the control board. The test fixture is used to lead out a test pin corresponding to the measured state signal of the measured state result.

2. The electronic water pump testing device according to claim 1, characterized in that, The control board includes an MCU chip unit, a power input interface, a power high-side switching circuit, an auxiliary power supply, a voltage detection and protection circuit, a phase current sampling circuit, an interface circuit, and a UVW interface. The power input interface is used to connect to the power supply and is also connected to the power high-side switching circuit and the auxiliary power supply. The power high-side switching circuit is also connected to the voltage detection and protection circuit and the test fixture. The voltage detection and protection circuit and the auxiliary power supply are also connected to the MCU chip unit. The phase current sampling circuit is connected to both the MCU chip unit and the UVW interface. The interface circuit is connected to both the MCU chip unit and the test fixture. The UVW interface is also connected to the test fixture.

3. The electronic water pump testing device according to claim 2, characterized in that, The power input interface includes a first diode and a first interface; the power high-side switching circuit includes a first MOSFET, a second MOSFET, a first transistor, a second transistor, a third transistor, a first capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and an AND gate integrated circuit; the anode of the first diode is grounded, and the cathode of the first diode is connected to the power supply; pins 1, 2, 3, and 4 of the first interface are all grounded, and pins 5 and 6 of the first interface are connected to the power supply; The drain of the first MOSFET is connected to the power supply, the source of the first MOSFET is connected to the drain of the second MOSFET, and the gate of the first MOSFET is connected to the second terminal of the first capacitor, the second terminal of the first resistor, the gate of the second MOSFET, and the collector of the second transistor. The first terminal of the first capacitor, the second terminal of the first resistor, and the drain of the second MOSFET are all grounded. The first terminal of the second resistor is connected to the power supply, and the second terminal of the second resistor is connected to the base of the first transistor and the emitter of the second transistor. The first terminal of the third resistor is connected to the power supply, and the second terminal of the third resistor is connected to the collector of the first transistor, the base of the second transistor, and the first terminal of the fourth resistor. The second terminal of the fourth resistor is connected to the collector of the third transistor. The base of the third transistor is connected to the 2Y pin of the AND gate integrated circuit through the fifth resistor, and the emitter of the third transistor is grounded.

4. The electronic water pump testing device according to claim 3, characterized in that, The control board further includes a power output interface; the power output interface includes a second interface, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a second capacitor, and a second diode; pins 1 and 2 of the second interface are connected to the source of the second MOSFET; pins 3, 4, 5, and 6 of the second interface are grounded through the sixth resistor, and are also connected to the first terminal of the second capacitor and the phase current sampling circuit, and to the negative terminal of the second diode; the second terminal of the second capacitor is grounded and is also connected to the phase current sampling circuit; the first terminal of the seventh resistor is connected to the source of the second MOSFET, and the second terminal of the seventh resistor is connected to the positive terminal of the second diode; the first terminal of the eighth resistor is connected to the source of the second MOSFET, and the second terminal of the eighth resistor is grounded through the ninth resistor.

5. The electronic water pump testing device according to claim 4, characterized in that, The voltage detection and protection circuit includes a voltage detection circuit and an overvoltage detection circuit; the voltage detection circuit includes a tenth resistor, an eleventh resistor, and a third capacitor; the overvoltage detection circuit includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a fourth capacitor, a fifth capacitor, and a first voltage comparator; the phase current sampling circuit includes a sixth capacitor, a seventh capacitor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a first operational amplifier, and a second operational amplifier; The first end of the tenth resistor is connected to the power supply, and the second end of the tenth resistor is grounded through the eleventh resistor; the first end of the third capacitor is connected to the power supply, and the second end of the third capacitor is grounded. The first end of the twelfth resistor is connected to the power supply; the second end of the twelfth resistor is connected to the positive input terminal of the first voltage comparator, the first end of the thirteenth resistor, and the first end of the fourth capacitor; the second end of the thirteenth resistor and the second end of the fourth capacitor are both grounded; the first ends of the fourteenth resistor, the fifth capacitor, and the fifteenth resistor are all connected to the negative input terminal of the first voltage comparator; the second ends of the fourteenth resistor and the fifth capacitor are both grounded; the second end of the fifteenth resistor and the output terminal of the first voltage comparator are both connected to pin 1A of the AND gate integrated circuit; the first end of the sixteenth resistor is connected to the power supply, and the second end of the sixteenth resistor is connected to the negative input terminal of the first voltage comparator. The first end of the seventeenth resistor is connected to the power supply, and the second end of the seventeenth resistor is grounded through the eighteenth resistor and also connected to the positive input terminal of the first operational amplifier; the sixth capacitor is connected in parallel with the eighteenth resistor; the negative input terminal and the output terminal of the first operational amplifier are both connected to the first end of the nineteenth resistor; the second end of the nineteenth resistor is connected to the positive input terminal of the second operational amplifier; the first end of the twentieth resistor is connected to the first end of the second capacitor, and the second end of the twentieth resistor is connected to the positive input terminal of the second operational amplifier; the first end of the twentieth resistor is connected to the second end of the second capacitor, and the second end of the twentieth resistor is connected to the negative input terminal of the second operational amplifier; the output terminal of the second operational amplifier is connected to the first end of the twentieth resistor; the second end of the twentieth resistor is connected to the negative input terminal of the second operational amplifier; the first end of the twentieth resistor is connected to the output terminal of the second operational amplifier; the second end of the twentieth resistor is grounded through the seventh capacitor.

6. The electronic water pump testing device according to claim 5, characterized in that, The MCU chip unit includes an MCU chip, a third interface, a 24th resistor, a 25th resistor, a 26th resistor, a 27th resistor, a 28th resistor, a 29th resistor, a 30th resistor, a 31st resistor, a 32nd resistor, a 33rd resistor, a 34th resistor, a 35th resistor, a 36th resistor, a 37th resistor, a 38th resistor, a 39th resistor, a 40th resistor, an 8th capacitor, a 9th capacitor, a 10th capacitor, an 11th capacitor, a 12th capacitor, a 13th capacitor, a 14th capacitor, a 15th capacitor, a first dual diode, a second dual diode, and a third dual diode; The first end of the 24th resistor is connected to the interface circuit, and the second end of the 24th resistor is connected to pin 1 of the MCU chip; the first end of the 25th resistor is connected to the interface circuit, and the second end of the 25th resistor is connected to pin 2 of the MCU chip; the first end of the 26th resistor is connected to the interface circuit, and the second end of the 26th resistor is connected to pin 3 of the MCU chip; the first end of the 8th capacitor is grounded, and the second end of the 8th capacitor is connected to the VDD pin of the MCU chip; the first end of the 27th resistor is connected to the power supply, and the second end of the 27th resistor is grounded through the 9th capacitor; the first end of the 28th resistor is grounded, and the second end of the 28th resistor is connected to the TRST pin of the MCU chip; the first end of the 29th resistor is connected to the first end of the 11th resistor, and the second end of the 29th resistor is connected to the first end of the first dual diode; the first end of the 30th resistor is connected to the first end of the 9th resistor, and the second end of the 30th resistor is connected to the second dual diode; the first end of the 10th capacitor is connected to the ADCA0 pin of the MCU chip, and the second end of the 10th capacitor is grounded; the first end of the 11th capacitor... The first terminal of the first dual diode is connected to the ADCA1 pin of the MCU chip, and the second terminal of the eleventh capacitor is grounded; the ADCA3 pin of the MCU chip is connected to the interface circuit; the second terminal of the first dual diode is connected to the VDDA pin of the MCU chip, both ends of the twelfth capacitor, the second terminal of the second dual diode, and the first terminal of the third dual diode; the second terminal of the second dual diode is also grounded; the first terminal of the thirty-first resistor is connected to the second terminal of the twenty-third resistor, and the second terminal of the thirty-first resistor is grounded through the thirteenth capacitor; the first terminal of the thirty-second resistor is connected to the interface circuit, and the second terminal of the thirty-second resistor is connected to the first terminal of the fourteenth capacitor and is also connected to the ADCB3 pin of the MCU chip; the first terminal of the thirty-third resistor is connected to the first terminal of the thirty-second resistor, and the second terminal of the thirty-third resistor is grounded; the second terminal of the fourteenth capacitor is grounded; the second terminal of the third dual diode is connected to the ADCB3 pin of the MCU chip; the first terminal of the thirty-fourth resistor is connected to the power supply, and the second terminal of the thirty-fourth resistor is connected to the PWM3A pin of the MCU chip; the PWM3A pin of the MCU chip is also connected to the 2B pin of the AND gate integrated circuit;The ECAP / GPIO24 pin of the MCU chip is connected to the interface circuit; the GPIO21 pin of the MCU chip is connected to the 4A pin of the AND gate integrated circuit; the PWM1A and GOIO11 pins of the MCU chip are connected to the interface circuit; the PWM3B pin of the MCU chip is connected to the 2B pin of the AND gate integrated circuit; the first end of the thirty-fifth resistor is connected to the third pin of the third interface; the second end of the thirty-fifth resistor is connected to the TDI pin of the MCU chip; the first end of the thirty-sixth resistor is connected to the seventh pin of the third interface; the second end of the thirty-sixth resistor is connected to the TDO pin of the MCU chip; the first end of the thirty-seventh resistor is connected to the first pin of the third interface; the second end of the thirty-seventh resistor is connected to the TMS pin of the MCU chip. The first end of the thirty-eighth resistor is connected to pin 11 of the third interface, and the second end of the thirty-eighth resistor is connected to the TCK pin of the MCU chip; the first end of the thirty-ninth resistor is connected to the power supply, and the second end of the thirty-ninth resistor is connected to the TDO pin of the MCU chip; the GPIO8, GPIO17, 31, and RXD pins of the MCU chip are connected to the interface circuit; the PWM2A pin of the MCU chip is connected to the display board; the first end of the fortieth resistor is connected to the TRST pin of the MCU chip, and the second end of the fortieth resistor is connected to pin 2 of the third interface; the first end of the fifteenth capacitor is connected to the power supply, and the second end of the fifteenth capacitor is grounded; pins 4, 10, 12, and 14 of the third interface are all grounded.

7. The electronic water pump testing device according to claim 6, characterized in that, The interface circuit includes a fourth interface, a fifth interface, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a third MOSFET, a fourth MOSFET, a third diode, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a forty-first resistor, a forty-second resistor, a forty-third resistor, a forty-fourth resistor, a forty-fifth resistor, a forty-sixth resistor, a forty-seventh resistor, a forty-eighth resistor, a forty-ninth resistor, a fiftieth resistor, a fifty-first resistor, a fifty-second resistor, a fifty-third resistor, a fifty-fourth resistor, a fifty-fifth resistor, a fifty-sixth resistor, a fifty-seventh resistor, a fifty-eighth resistor, a fifty-ninth resistor, a sixtieth resistor, and a sixty-first resistor; the forty-first resistor's... One end of the resistor is connected to the 4Y pin of the AND gate integrated circuit; the second end of the forty-first resistor is connected to the base of the fourth transistor; the emitter of the fourth transistor is grounded; the collector of the fourth transistor is connected to the second end of the forty-fourth resistor; the first end of the forty-third resistor is connected to the power supply; the second end of the forty-third resistor is connected to both the gate of the third MOS transistor and the first end of the forty-fourth resistor; the drain of the third MOS transistor is connected to the power supply; the source of the third MOS transistor is connected to the first end of the forty-fifth resistor; the first end of the forty-second resistor is connected to the 4Y pin of the AND gate integrated circuit; the second end of the forty-second resistor is connected to the base of the fifth transistor. The base is connected; the collector of the fifth transistor is connected to the first terminal of the forty-seventh resistor, the first terminal of the forty-eighth resistor, and the second terminal of the forty-ninth resistor; the emitter of the fifth transistor is grounded; the second terminal of the forty-seventh resistor is connected to the gate of the fourth MOS transistor; the second terminal of the forty-eighth resistor is grounded; the first terminal of the forty-ninth resistor is connected to the power supply; the drain of the fourth MOS transistor is connected to the first terminal of the forty-sixth resistor, and the source of the fourth MOS transistor is grounded; the second terminals of the forty-fifth and forty-sixth resistors are connected to the cathode of the third diode, and also to pins 5 and 6 of the fourth interface; the third diode... The positive terminal of the transistor is grounded; pins 3 and 4 of the fourth interface are grounded; the first end of the fiftieth resistor is connected to the ECAP / GPIO24 pin of the MCU chip, and the second end of the fiftieth resistor is connected to the first end of the fifty-first resistor and the collector of the sixth transistor; the second end of the fifty-first resistor is grounded; the first end of the sixteenth capacitor is connected to the ECAP / GPIO24 pin of the MCU chip, and the second end of the sixteenth capacitor is grounded; the emitter of the sixth transistor is connected to the power supply, and the base of the sixth transistor is connected to the second end of the fifty-second resistor and the first end of the fifty-third resistor; the first end of the fifty-second resistor is connected to the power supply.The second terminal of the fifty-third resistor is connected to the collector of the seventh transistor; the emitter of the seventh transistor is grounded; the first terminal of the seventeenth capacitor is connected to the base of the seventh transistor, and the second terminal of the seventeenth capacitor is grounded; the fifty-fourth resistor is connected in parallel with the seventeenth capacitor; the first terminal of the fifty-fifth resistor is connected to the base of the seventh transistor, and the second terminal of the fifty-fifth resistor is connected to the first terminal of the fifty-sixth resistor and the emitter of the eighth transistor; the second terminal of the fifty-sixth resistor is connected to the emitter of the ninth transistor and the base of the eighth transistor; the collector of the eighth transistor and the base of the ninth transistor are both connected to the second terminal of the fifty-ninth resistor; the first terminal of the fifty-ninth resistor is connected to the collector of the ninth transistor, the first terminal of the eighteenth capacitor, and the first terminal of the fifty-seventh resistor; the second terminal of the eighteenth capacitor is grounded; the second terminals of the fifty-seventh resistor and the fifty-eighth resistor are both connected to pin 1 of the fourth interface; The first terminal of the fifty-eighth resistor is grounded; pins 1 and 2 of the fifth interface are both connected to the power supply through the sixtieth and sixty-first resistors connected in parallel; pin 3 of the fifth interface is grounded; pin 5 of the fifth interface is connected to the first terminal of the twenty-fifth resistor; pin 7 of the fifth interface is connected to the PWM1A pin of the MCU chip; pin 9 of the fifth interface is connected to the GPIO11 pin of the MCU chip; pin 11 of the fifth interface is connected to the GPIO8 pin of the MCU chip; pin 13 of the fifth interface is connected to the first terminal of the thirty-second resistor; pin 6 of the fifth interface is connected to the first terminal of the twenty-fourth resistor; pin 8 of the fifth interface is connected to the first terminal of the twenty-sixth resistor; pin 10 of the fifth interface is connected to the GPIO17 pin of the MCU chip; pin 12 of the fifth interface is connected to the RXD pin of the MCU chip; pin 14 of the fifth interface is connected to the 31st pin of the MCU chip.

8. The electronic water pump testing device according to claim 7, characterized in that, The test fixture includes a test handle; the test handle includes a sixth interface, a fourth dual diode, a nineteenth capacitor, a sixty-second resistor, a sixty-third resistor, and a sixty-fourth resistor; the second pin of the sixth interface is connected to the second end of the sixty-second resistor, the first end of the sixty-third resistor, and the first end of the sixty-fourth resistor; the first end of the sixty-second resistor is connected to the power supply; the second end of the sixty-third resistor is connected to the first end of the fourth dual diode, and also to the first end of the nineteenth capacitor and pin 1B of the AND gate integrated circuit; the second end of the sixty-fourth resistor is grounded; the second end of the nineteenth capacitor is grounded; the second end of the fourth dual diode is connected to the power supply and is also grounded.

9. The electronic water pump testing device according to claim 8, characterized in that, The display panel includes a buzzer circuit; the buzzer circuit includes a buzzer, a 65th resistor, a 66th resistor, a 67th resistor, and a 13th transistor; the first end of the 65th resistor is connected to the PWM2A pin of the MCU chip, the second end of the 65th resistor is connected to the base of the 13th transistor and the first end of the 67th resistor; the emitter of the 13th transistor and the second end of the 67th resistor are grounded; the collector of the 13th transistor is connected to the buzzer; the first end of the 66th resistor is connected to the power supply, and the second end of the 66th resistor is connected to the buzzer.

10. An electronic water pump testing system, characterized in that, The device includes the electronic water pump testing apparatus as described in any one of claims 1-9, and further includes a test load water circuit, wherein the test load water circuit is connected to the control board in the electronic water pump testing apparatus.

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