Solenoid coil product qualification test equipment

Abstract

The utility model discloses an electromagnetic coil product qualification test device comprising a main control chip, a controllable DC power supply module, a current acquisition module, a voltage acquisition module, a controllable insulation resistance test module and an electromagnetic coil product test interface. The controllable direct current power supply module, the current acquisition module, the voltage acquisition module and the controllable insulation resistance test module are connected with the main control chip; the controllable DC power supply module and the controllable insulation resistance test module are connected with the electromagnetic coil product test interface. The current acquisition module and the voltage acquisition module are connected with the controllable DC power supply module. The electromagnetic coil product qualification test equipment provided by the utility model is not only high in test efficiency, but also accurate in test.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic coils, and more particularly to a qualified testing device for electromagnetic coil products. Background Art

[0002] Electromagnetic coil product qualification testing equipment is a vital component in the electronics manufacturing industry. As a key component in electronics manufacturing, electromagnetic coils are widely used in various electronic devices such as motors, generators, and transformers. Therefore, strict quality control and testing of electromagnetic coil products is crucial to ensuring the performance and stability of electronic equipment.

[0003] The current electromagnetic coil product qualification test method in factories usually uses manual operation of multiple test instruments to determine whether the electromagnetic coil product to be tested is qualified. This method is not only inefficient but also the test results are easily affected by human error, resulting in inaccurate test results.

[0004] Therefore, how to provide an electromagnetic coil product qualification testing device that has high testing efficiency and accurate testing is an urgent problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide an electromagnetic coil product qualification testing device, which has high testing efficiency and accurate testing.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An electromagnetic coil product qualification test device, comprising a main control chip, a controllable DC power supply module, a current acquisition module, a voltage acquisition module, a controllable insulation resistance test module, and an electromagnetic coil product test interface;

[0008] The controllable DC power supply module, the current acquisition module, the voltage acquisition module and the controllable insulation resistance test module are all connected to the main control chip;

[0009] The controllable DC power supply module and the controllable insulation resistance test module are both connected to the electromagnetic coil product test interface;

[0010] The current acquisition module and the voltage acquisition module are both connected to the controllable DC power supply module;

[0011] The controllable DC power supply module, the current acquisition module and the voltage acquisition module are used together to test the internal resistance of the electromagnetic coil product to be tested;

[0012] The controllable insulation resistance test module is used to test the insulation resistance of the electromagnetic coil product to be tested.

[0013] Preferably, the electromagnetic coil product qualification test equipment further includes an LCD display screen;

[0014] The LCD display screen is connected to the main control chip;

[0015] The LCD display screen is used to display the internal resistance and insulation resistance of the electromagnetic coil product to be tested.

[0016] Preferably, the electromagnetic coil product qualification test equipment further includes a voice broadcast module;

[0017] The voice broadcast module is connected to the main control chip;

[0018] The voice broadcast module is used to announce whether the electromagnetic coil product to be tested is qualified.

[0019] Preferably, the electromagnetic coil product qualification test equipment further includes a Bluetooth module;

[0020] The Bluetooth module is connected to the main control chip;

[0021] The Bluetooth module is used to send the internal resistance and insulation resistance obtained by the test to the host computer.

[0022] Preferably, the positive output terminal of the controllable DC power supply module is connected to the IN+ pin of the current acquisition module;

[0023] The IN- pin of the current acquisition module is connected to the positive pole of the electromagnetic coil product test interface;

[0024] The negative pole of the electromagnetic coil product test interface is connected to the negative output terminal of the controllable DC power supply module;

[0025] The positive output terminal of the controllable DC power supply module is connected to the IN+ pin of the voltage acquisition module;

[0026] The GND_2 pin of the voltage acquisition module and the GND_2 pin of the current acquisition module are both connected to the negative pole of the electromagnetic coil product test interface.

[0027] Preferably, the HV negative pin of the controllable insulation resistance test module is connected to the negative pole of the electromagnetic coil product test interface;

[0028] The positive pole of the electromagnetic coil product test interface is connected to the INPUT pin of the controllable insulation resistance test module.

[0029] Preferably, the main control chip adopts STM32F407 control chip;

[0030] The SCL pin of the current acquisition module is connected to the PE2 pin of the STM32F407 control chip;

[0031] The SDA pin of the current acquisition module is connected to the PE3 pin of the STM32F407 control chip;

[0032] The SCL pin of the voltage acquisition module is connected to the PE0 pin of the STM32F407 control chip;

[0033] The SDA pin of the voltage acquisition module is connected to the PE1 pin of the STM32F407 control chip.

[0034] Preferably, the SCL pin of the LCD display is connected to the PE5 pin of the STM32F407 control chip;

[0035] The SDA pin of the LCD display is connected to the PE6 pin of the STM32F407 control chip;

[0036] The RES pin of the LCD display is connected to the PE7 pin of the STM32F407 control chip;

[0037] The DC pin of the LCD display is connected to the PE8 pin of the STM32F407 control chip;

[0038] The CS pin of the LCD display is connected to the PE9 pin of the STM32F407 control chip.

[0039] Preferably, the TX pin of the voice broadcast module is connected to the PA3 pin of the STM32F407 control chip;

[0040] The RX pin of the voice broadcast module is connected to the PA2 pin of the STM32F407 control chip;

[0041] The IO8 pin of the voice broadcast module is connected to the PB7 pin of the STM32F407 control chip.

[0042] Preferably, the TX pin of the Bluetooth module is connected to the PA10 pin of the STM32F407 control chip;

[0043] The RX pin of the Bluetooth module is connected to the PA9 pin of the STM32F407 control chip.

[0044] It can be seen from the above technical solutions that, compared with the prior art, the present invention provides an electromagnetic coil product qualification testing device, which has high testing efficiency and accurate testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0046] Figure 1 This is a structural diagram of the STM32F407 control chip adopted in this utility model.

[0047] Figure 2 This is a circuit schematic diagram of the utility model's controllable DC power supply module, current acquisition module, voltage acquisition module, controllable insulation resistance test module, and electromagnetic coil product test interface;

[0048] Figure 3 The circuit principle diagram of the LCD display screen provided by the utility model;

[0049] Figure 4 The circuit diagram of the voice broadcast module provided by the utility model;

[0050] Figure 5 The circuit diagram of the Bluetooth module provided by the utility model;

[0051] FIG6( a ) is a circuit diagram of an AC220V to DC5V module provided by the present invention;

[0052] FIG6( b ) is a circuit diagram of a DC5V to DC3.3V module provided by the present invention;

[0053] Figure 7 This is a circuit diagram of the power-on indication module provided by the utility model;

[0054] Figure 8 This is a circuit diagram of the cooling fan provided by the utility model;

[0055] Figure 9 A circuit diagram of the test button provided by the utility model;

[0056] Figure 10 This is the reset circuit of the STM32F407 control chip of the utility model;

[0057] Figure 11 It is the BOOT circuit of the STM32F407 control chip of the utility model;

[0058] Figure 12 It is the pin test interface of the STM32F407 control chip of the utility model;

[0059] Figure 13 This is the power filter circuit of the STM32F407 control chip of the utility model;

[0060] Figure 14 This is a front view of the electromagnetic coil product qualification testing equipment provided by the utility model.

[0061] Figure 14 Middle: Device housing 1, test button 2, LCD display 3, electromagnetic coil product test interface 4, power-on indicator 5, Bluetooth module 6, voice broadcast module 7, cooling fan 8, AC power interface 9, power switch 10. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0063] The embodiment of the utility model discloses an electromagnetic coil product qualification test device, comprising a main control chip, a controllable DC power supply module, a current acquisition module, a voltage acquisition module, a controllable insulation resistance test module and an electromagnetic coil product test interface 4;

[0064] The controllable DC power supply module, the current acquisition module, the voltage acquisition module and the controllable insulation resistance test module are all connected to the main control chip;

[0065] The controllable DC power supply module and the controllable insulation resistance test module are both connected to the electromagnetic coil product test interface;

[0066] The current acquisition module and the voltage acquisition module are both connected to the controllable DC power supply module;

[0067] The controllable DC power supply module, the current acquisition module and the voltage acquisition module are used together to test the internal resistance of the electromagnetic coil product to be tested;

[0068] The controllable insulation resistance test module is used to test the insulation resistance of the electromagnetic coil product to be tested.

[0069] Furthermore, the controllable DC power supply module can provide a power supply capacity of 0-30V and 0-10A, and the controllable DC power supply module is connected to the main control chip through RS232 communication.

[0070] The voltage test range of the controllable insulation resistance test module is 1-1000V, and the insulation resistance test range is 100K-10TΩ. The controllable insulation resistance test module adopts RS232 to communicate with the main control chip.

[0071] The power supply voltage of the current acquisition module is 3.3~5.5V, the measurable current is 0~10A, the current resolution is 1mA, and the relative error is <±0.2%. The current acquisition module adopts I 2 C is in communication connection with the main control chip.

[0072] The voltage acquisition module has a supply voltage of 3.3 to 5.5 V, a measurable voltage range of 0 to 30 V, a voltage resolution of 4 mV, and a relative error of <±0.2%. 2 C is in communication with the main control chip.

[0073] Furthermore, the electromagnetic coil product qualification test equipment further includes an LCD display screen;

[0074] The LCD display screen is connected to the main control chip;

[0075] The LCD display screen is used to display the internal resistance and insulation resistance of the electromagnetic coil product to be tested.

[0076] The LCD display screen is also used to display a measurement progress bar. When the measurement is completed, the internal resistance and insulation resistance of the electromagnetic coil product to be tested are displayed, and the pass / fail status is displayed.

[0077] Furthermore, the LCD display screen is a 7-inch LCD display screen with a resolution of 800*480 and a refresh rate of >60 frames per second. 2 C is in communication connection with the main control chip.

[0078] Furthermore, the electromagnetic coil product qualification test equipment further includes a voice broadcast module;

[0079] The voice broadcast module is connected to the main control chip;

[0080] The voice broadcast module is used to announce whether the electromagnetic coil product to be tested is qualified.

[0081] Furthermore, the voice broadcast module adopts USART to communicate with the main control chip, and the voice broadcast module realizes the conversion of text data into voice, that is, converting the text "qualified" into the voice "qualified"; and converting the text "unqualified" into the voice "unqualified".

[0082] Furthermore, the electromagnetic coil product qualification test equipment further includes a Bluetooth module;

[0083] The Bluetooth module is connected to the main control chip;

[0084] The Bluetooth module is used to send the internal resistance, insulation resistance and pass / fail status obtained from the test to the host computer.

[0085] In this embodiment, the frequency of the Bluetooth module is 2.4 GHz, the rate is 2 Mbps, and the communication distance is 10 meters; the Bluetooth module uses USART to communicate with the main control chip.

[0086] Further, if Figure 2 As shown, the positive output terminal of the controllable DC power supply module is connected to the IN+ pin of the current acquisition module;

[0087] The IN- pin of the current acquisition module is connected to the positive pole of the electromagnetic coil product test interface;

[0088] The negative pole of the electromagnetic coil product test interface is connected to the negative output terminal of the controllable DC power supply module;

[0089] The positive output terminal of the controllable DC power supply module is connected to the IN+ pin of the voltage acquisition module;

[0090] The GND_2 pin of the voltage acquisition module and the GND_2 pin of the current acquisition module are both connected to the negative pole of the electromagnetic coil product test interface.

[0091] Furthermore, the HV negative pin of the controllable insulation resistance test module is connected to the negative pole of the electromagnetic coil product test interface; wherein the HV negative pin is Figure 2 HV(-) pin in;

[0092] The positive pole of the electromagnetic coil product test interface is connected to the INPUT pin of the controllable insulation resistance test module.

[0093] Furthermore, the main control chip adopts STM32F407 control chip (such as Figure 1 shown);

[0094] The SCL pin of the current acquisition module is connected to the PE2 pin of the STM32F407 control chip;

[0095] The SDA pin of the current acquisition module is connected to the PE3 pin of the STM32F407 control chip;

[0096] The SCL pin of the voltage acquisition module is connected to the PE0 pin of the STM32F407 control chip;

[0097] The SDA pin of the voltage acquisition module is connected to the PE1 pin of the STM32F407 control chip.

[0098] Furthermore, the controllable DC power supply module includes an RS232 module;

[0099] The TXD pin of the RS232 module is connected to the TXD pin of the RS232 to TTL module;

[0100] The RXD pin of the RS232 module is connected to the RXD pin of the RS232 to TTL module;

[0101] The SG pin of the RS232 module is connected to the SG pin of the RS232 to TTL module;

[0102] The TX pin of the RS232 to TTL module is connected to the PB11 pin of the STM32F407 control chip;

[0103] The RX pin of the RS232 to TTL module is connected to the PB10 pin of the STM32F407 control chip;

[0104] Furthermore, the controllable insulation resistance test module also includes an RS232 module;

[0105] The TXD pin of the RS232 module is connected to the TXD pin of the RS232 to TTL module;

[0106] The RXD pin of the RS232 module is connected to the RXD pin of the RS232 to TTL module;

[0107] The SG pin of the RS232 module is connected to the SG pin of the RS232 to TTL module;

[0108] The TX pin of the RS232 to TTL module is connected to the PA1 pin of the STM32F407 control chip;

[0109] The RX pin of the RS232 to TTL module is connected to the PA0 pin of the STM32F407 control chip;

[0110] Further, if Figure 3 As shown, the SCL pin of the LCD display is connected to the PE5 pin of the STM32F407 control chip;

[0111] The SDA pin of the LCD display is connected to the PE6 pin of the STM32F407 control chip;

[0112] The RES pin of the LCD display is connected to the PE7 pin of the STM32F407 control chip;

[0113] The DC pin of the LCD display is connected to the PE8 pin of the STM32F407 control chip;

[0114] The CS pin of the LCD display is connected to the PE9 pin of the STM32F407 control chip.

[0115] Further, if Figure 4 As shown, the TX pin of the voice broadcast module is connected to the PA3 pin of the STM32F407 control chip;

[0116] The RX pin of the voice broadcast module is connected to the PA2 pin of the STM32F407 control chip;

[0117] The IO8 pin of the voice broadcast module is connected to the PB7 pin of the STM32F407 control chip.

[0118] Further, if Figure 5 As shown, the TX pin of the Bluetooth module is connected to the PA10 pin of the STM32F407 control chip;

[0119] The RX pin of the Bluetooth module is connected to the PA9 pin of the STM32F407 control chip.

[0120] Furthermore, the electromagnetic coil product qualification test equipment further includes a cooling fan 8, which is used to dissipate heat from the equipment.

[0121] Furthermore, the electromagnetic coil product qualification test equipment further includes a power supply module, which includes an AC220V to DC5V module (as shown in FIG6(a)) and a DC5V to DC3.3V module (as shown in FIG6(b));

[0122] Pin 1 of the AC power interface 9 is connected to the input pin (pin 3) of the power-on switch 10;

[0123] The output pins (pins 1 and 2) of the power-on switch 10 are connected to the L pin of the AC220V to DC5V module;

[0124] The output leads (pin 1 and pin 2) of the power-on switch 10 are connected to the L pin of the controllable DC power supply module and the L pin of the controllable insulation resistance test module respectively;

[0125] Pin 2 of the AC power interface 9 is connected to the N pin of the AC220V to DC5V module;

[0126] Pin 2 of the AC power interface 9 is connected to the N pin of the controllable DC power supply module and the N pin of the controllable insulation resistance test module;

[0127] The AC power interface 9 is used for external connection to 220V AC mains power.

[0128] The +5V output pin of the AC220V to DC5V module is also connected to the current acquisition module, voltage acquisition module, LCD display, voice broadcast module, Bluetooth module and cooling fan (such as Figure 8 (as shown) connected to the VCC pin;

[0129] The +5V output pin of the AC220V to DC5V module is connected to the 5V input pin of the DC5V to DC3.3V module;

[0130] The 3.3V output pin of the DC5V to DC3.3V module is connected to the VDD pin of the STM32F407 control chip;

[0131] Further, such as Figure 7 As shown, the electromagnetic coil product qualification test equipment further includes a power-on indication module; the power-on indication module includes a resistor R1 and a power-on indicator light (light emitting diode);

[0132] One end of the resistor R1 is connected to the +5V output pin of the AC220V to DC5V converter;

[0133] The other end of the resistor R1 is connected to the anode of the light emitting diode;

[0134] The cathode of the light emitting diode is grounded.

[0135] Further, such as Figure 9 As shown, the electromagnetic coil product qualification test equipment further includes a test button 2, one end of which is connected to the PE4 pin of the STM32F407 control chip;

[0136] The other end of the test button 2 is grounded through a resistor R3;

[0137] Press the test button 2, and the electromagnetic coil product qualification test equipment provided by the utility model starts to test the electromagnetic coil product to be tested.

[0138] Further: Figure 10 As shown, the electromagnetic coil product qualification test equipment further includes a reset circuit; the reset circuit is used to reset the STM32F407 control chip;

[0139] Further: Figure 11As shown, the electromagnetic coil product qualification test equipment further includes a BOOT circuit; the BOOT circuit is used to select the working mode of the STM32F407 control chip, and the BOOT circuit is provided in the data sheet.

[0140] Further: Figure 12 As shown, the electromagnetic coil product qualification test equipment further includes a pin test interface; the pin test interface is used to test the pins of the STM32F407 control chip.

[0141] Further: Figure 13 As shown, the electromagnetic coil product qualification test equipment further includes a power supply filter circuit, which is used to filter the 3.3V power supply voltage of the STM32F407 control chip.

[0142] like Figure 14 As shown, the STM32F407 control chip, controllable DC power supply module, current acquisition module, voltage acquisition module, and controllable insulation resistance test module are all located inside the device housing 1;

[0143] The working principle of the utility model is as follows: connect the AC power interface 9 to 220V AC mains power, connect the electromagnetic coil product to be tested to the electromagnetic coil product test interface 4; turn on the power switch 10, the power indicator light 5 lights up, and press the test button 2:

[0144] STM32F407 control chip controls the controllable DC power supply module to apply a certain voltage (such as 12V) on the electromagnetic coil product test interface 4, and then reads the current data of the current acquisition module and the voltage data of the voltage acquisition module, and calculates the internal resistance of the electromagnetic coil product to be measured based on the voltage data and current data read (the control, reading, internal resistance calculation, data transmission and other processes of the STM32F407 control chip are all prior art);

[0145] The STM32F407 control chip controls the controllable insulation resistance test module to start the measurement mode. The controllable insulation resistance test module applies a voltage test signal to the electromagnetic coil product test interface 4, calculates the insulation resistance of the electromagnetic coil product to be tested, and then returns the measured insulation resistance to the STM32F407 control chip. (The control of the STM32F407 control chip, insulation resistance calculation, and data transmission processes are all prior art.)

[0146] The STM32F407 control chip determines whether the product is qualified based on the internal resistance and insulation resistance of the electromagnetic coil product to be tested; (the process of the STM32F407 control chip determining whether the product is qualified is prior art).

[0147] The STM32F407 control chip sends the internal resistance and insulation resistance of the electromagnetic coil product to be tested to the LCD display 3 for display; (the data transmission process between the STM32F407 control chip and the LCD display is a prior art).

[0148] The STM32F407 control chip sends the text "qualified" or "unqualified" to the voice broadcast module 7, and the voice broadcast module 7 converts the text "qualified" or "unqualified" into the voice "qualified" or "unqualified" and broadcasts it. (The data transmission process between the STM32F407 control chip and the voice broadcast module 7 is prior art).

[0149] Further:

[0150] R1: 10K Euro

[0151] R3: 10K Euro

[0152] R7: 1M ohm

[0153] R8: 10 Euro

[0154] R9: 10K

[0155] R10: 0 Euro

[0156] R11: 0 Euro

[0157] R12: 2.7K ohms

[0158] R15: 10K Euro

[0159] R16: 10K ohms

[0160] C1: 10pF

[0161] C2: 10pF

[0162] C3: 22pF

[0163] C4: 22pFC5: 2.2uF (the mark on the C5 capacitor is 225, which means 22*10 5 pF=2.2uF)

[0164] C6: 2.2uF (the mark on the C6 capacitor is 225, which means 22*10 5 pF=2.2uF)

[0165] C7: 10uF C8-C21: 0.1uF (the mark on the capacitor of C8-C21 is 104, which means 10*10 4 pF=0.1uF)C22:150uF

[0166] C23: 150uF

[0167] C24: 0.1uF

[0168] C25: 10uF

[0169] Crystal oscillator Y1: 8MHZ

[0170] Crystal oscillator Y2: 32.768KHZ;

[0171] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0172] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A electromagnetic coil product qualification test equipment, characterized in that: Including main control chip, controllable DC power supply module, current acquisition module, voltage acquisition module, controllable insulation resistance test module and electromagnetic coil product test interface; The controllable DC power supply module, the current acquisition module, the voltage acquisition module and the controllable insulation resistance test module are all connected to the main control chip; The controllable DC power supply module and the controllable insulation resistance test module are both connected to the electromagnetic coil product test interface; The current acquisition module and the voltage acquisition module are both connected to the controllable DC power supply module; The controllable DC power supply module, the current acquisition module and the voltage acquisition module are used together to test the internal resistance of the electromagnetic coil product to be tested; The controllable insulation resistance test module is used to test the insulation resistance of the electromagnetic coil product to be tested.

2. The electromagnetic coil product qualification test equipment according to claim 1, characterized in that: It also includes an LCD display; The LCD display screen is connected to the main control chip; The LCD display screen is used to display the internal resistance and insulation resistance of the electromagnetic coil product to be tested.

3. The electromagnetic coil product qualification test equipment according to claim 2, characterized in that: It also includes a voice broadcast module; The voice broadcast module is connected to the main control chip; The voice announcement module is used to announce whether the electromagnetic coil product to be tested is qualified.

4. The electromagnetic coil product qualification test equipment according to claim 3, characterized in that: Also includes Bluetooth module; The Bluetooth module is connected to the main control chip; The Bluetooth module is used to send the internal resistance and insulation resistance obtained by the test to the host computer.

5. The electromagnetic coil product qualification test equipment according to claim 1, characterized in that: The positive output terminal of the controllable DC power supply module is connected to the IN+ pin of the current acquisition module; The IN- pin of the current acquisition module is connected to the positive pole of the electromagnetic coil product test interface; The negative pole of the electromagnetic coil product test interface is connected to the negative output terminal of the controllable DC power supply module; The positive output terminal of the controllable DC power supply module is connected to the IN+ pin of the voltage acquisition module; The GND_2 pin of the voltage acquisition module and the GND_2 pin of the current acquisition module are both connected to the negative pole of the electromagnetic coil product test interface.

6. The electromagnetic coil product qualification test equipment according to claim 1 or 5, characterized in that: The HV negative pin of the controllable insulation resistance test module is connected to the negative pole of the electromagnetic coil product test interface; The positive pole of the electromagnetic coil product test interface is connected to the INPUT pin of the controllable insulation resistance test module.

7. The electromagnetic coil product qualification test equipment according to claim 4, characterized in that: The main control chip adopts STM32F407 control chip; The SCL pin of the current acquisition module is connected to the PE2 pin of the STM32F407 control chip; The SDA pin of the current acquisition module is connected to the PE3 pin of the STM32F407 control chip; The SCL pin of the voltage acquisition module is connected to the PE0 pin of the STM32F407 control chip; The SDA pin of the voltage acquisition module is connected to the PE1 pin of the STM32F407 control chip.

8. The electromagnetic coil product qualification test equipment according to claim 7, characterized in that: The SCL pin of the LCD display is connected to the PE5 pin of the STM32F407 control chip; The SDA pin of the LCD display is connected to the PE6 pin of the STM32F407 control chip; The RES pin of the LCD display is connected to the PE7 pin of the STM32F407 control chip; The DC pin of the LCD display is connected to the PE8 pin of the STM32F407 control chip; The CS pin of the LCD display screen is connected to the PE9 pin of the STM32F407 control chip.

9. The electromagnetic coil product qualification test equipment according to claim 7, characterized in that: The TX pin of the voice broadcast module is connected to the PA3 pin of the STM32F407 control chip; The RX pin of the voice broadcast module is connected to the PA2 pin of the STM32F407 control chip; The IO8 pin of the voice broadcast module is connected to the PB7 pin of the STM32F407 control chip.

10. The electromagnetic coil product qualification test equipment according to claim 7, characterized in that: The TX pin of the Bluetooth module is connected to the PA10 pin of the STM32F407 control chip; the RX pin of the Bluetooth module is connected to the PA9 pin of the STM32F407 control chip.

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