Flying probe control circuit

Abstract

The utility model provides a flying probe control circuit which comprises a master control circuit and a peripheral circuit, and the master control circuit comprises a master control chip; the peripheral circuit comprises a peripheral chip and a driving device, the first communication module is electrically connected to the peripheral chip and the main control chip, and the second communication module is electrically connected to the first-type flying probe head; the peripheral chip is electrically connected to the driving equipment, and the driving equipment is used for controlling the second-type flying probe head; wherein the first communication module is used for serial communication, and the second communication module is used for TWI communication. The main control chip controls the first communication module to send an instruction to the peripheral chip in a serial communication mode, the peripheral chip controls the driving equipment, and the driving equipment controls the second-type flying probe head. And the main control chip controls the second communication module to control the first-type flying probe head in a TWI communication mode. TWI communication and serial communication are combined, so that the method can be suitable for a scene in which complex control and simple control are combined, and occupation of computing resources of the single-chip microcomputer is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flying probe circuits, in particular to a flying probe control circuit. Background Art

[0002] After the printed circuit board is manufactured, it is necessary to test whether the circuit board has an open circuit or a short circuit. Currently, one of the ways to test whether a circuit board has open circuits and short circuits is the flying probe test.

[0003] With the continuous development of electronic technology, single-chip microcomputers have the characteristics of single-task and controllable control time, and play an important role in the field of real-time control of test equipment. However, in practical applications, single-chip microcomputers need to communicate with multiple peripherals to control flying probes in different directions. Single-chip microcomputers use a single communication method that cannot adapt to the combination of complex control and simple control, which easily leads to a waste of single-chip microcomputer computing resources.

[0004] Therefore, a method is needed that can be applied to scenarios combining complex control and simple control to reduce the occupation of microcontroller computing resources. Utility Model Content

[0005] In order to overcome the problems existing in the related art, the purpose of the utility model is to provide a flying probe control circuit, which can be applicable to the scenario of combining complex control and simple control, and reduce the occupation of single-chip microcomputer computing resources.

[0006] A flying probe control circuit comprises a main control circuit and a peripheral circuit, wherein the main control circuit comprises a main control chip; the peripheral circuit comprises a peripheral chip and a driving device, a first communication module is electrically connected to the peripheral chip and the main control chip, and a second communication module is electrically connected to a first type of flying probe needle head; the peripheral chip is electrically connected to the driving device, and the driving device is used to control a second type of flying probe needle head; wherein the first communication module is used for serial communication, and the second communication module is used for TWI communication.

[0007] In a preferred technical solution of the present utility model, the first communication module includes a FT245 chip, and an input end of the first communication module is electrically connected to a first output end of the main control chip.

[0008] In a preferred technical solution of the present utility model, the second communication module includes the SCL pin and the SDA pin of the main control chip.

[0009] In a preferred technical solution of the present utility model, the model of the peripheral chip is ATMEGA16, the output end of the peripheral chip is electrically connected to the input end of the motor drive chip; the first input end of the peripheral chip is electrically connected to the second communication module, the second input end of the peripheral chip is electrically connected to the sampling circuit, and the third input end of the peripheral chip is electrically connected to the sensor.

[0010] In a preferred technical solution of the utility model, the driving device includes a plurality of motors, the motor driving chip is electrically connected to the corresponding motors, and the motors are used to control the corresponding second-type flying probe needles.

[0011] In a preferred technical solution of the utility model, the sampling circuit includes a sampling chip, the input end of the sampling chip is electrically connected to the first type of flying probe needle and the second type of flying probe needle, and the output end of the sampling chip is electrically connected to the sampling end of the peripheral chip; the sampling chip is used to convert the analog sampling signal into a digital sampling signal and send the digital sampling signal to the sampling end of the peripheral chip.

[0012] In a preferred technical solution of the present utility model, the first communication end of the main control chip is electrically connected to the first communication module, and the first communication module is electrically connected to the USB interface of the computer.

[0013] In a preferred technical solution of the utility model, the peripheral chip is electrically connected to the input end of the test voltage switch circuit, the output end of the test voltage switch circuit is electrically connected to the second type of flying probe needle, and the test voltage switch circuit is used to test the voltage of the second type of flying probe needle.

[0014] In a preferred technical solution of the utility model, the flying probe control circuit also includes a first power supply module and a second power supply module, the input end of the first power supply module is electrically connected to a 24V power supply, and the output end of the first power supply module outputs a 5V power supply; the input end of the second power supply module is electrically connected to the 24V power supply, and the output end of the second power supply module outputs a 15V power supply.

[0015] In a preferred technical solution of the utility model, the input end of the sampling chip is electrically connected to the output end of the sampling operational amplifier, and the non-inverting input end of the sampling operational amplifier is electrically connected to the second end of the first sampling resistor; the first end of the first sampling resistor is electrically connected to the first type of flying probe needle or the second type of flying probe needle, the second end of the first sampling resistor is electrically connected to the first end of the second sampling resistor, and the second end of the second sampling resistor is grounded.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides a flying probe control circuit including a main control circuit and a peripheral circuit, wherein the main control circuit includes a main control chip; the peripheral circuit includes a peripheral chip and a driving device, a first communication module is electrically connected to the peripheral chip and the main control chip, and a second communication module is electrically connected to a first type of flying probe needle head; the peripheral chip is electrically connected to the driving device, and the driving device is used to control a second type of flying probe needle head; wherein the first communication module is used for serial communication, and the second communication module is used for TWI communication. The main control chip controls the first communication module to send instructions to the peripheral chip by serial communication, the peripheral chip controls the driving device, and the driving device controls the second type of flying probe needle head. The serial communication method is suitable for complex control of the flying probe needle head. The main control chip controls the second communication module to control the first type of flying probe needle head by TWI communication. The TWI communication method is relatively simple and suitable for simple control of the flying probe needle head. Combining TWI communication and serial communication, it can be applied to the scene combining complex control and simple control, reducing the occupation of single-chip microcomputer computing resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a module diagram of the flying probe control circuit provided by the utility model;

[0019] Figure 2 It is a circuit diagram of the main control circuit provided by the utility model;

[0020] Figure 3 It is a circuit diagram of the peripheral circuit provided by the utility model;

[0021] Figure 4 It is a circuit diagram of a test voltage switch circuit provided by the utility model;

[0022] Figure 5 It is a circuit diagram of the first power supply module provided by the utility model;

[0023] Figure 6 This is a circuit diagram of the second power supply module provided by the utility model. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0025] Example 1

[0026] like Figure 1-Figure 6As shown, this embodiment provides a flying probe control circuit, including a main control circuit and a peripheral circuit, the main control circuit including a main control chip; the peripheral circuit including a peripheral chip and a driving device, a first communication module is electrically connected to the peripheral chip and the main control chip, and a second communication module is electrically connected to a first type of flying probe needle head; the peripheral chip is electrically connected to the driving device, and the driving device is used to control a second type of flying probe needle head; wherein, the first communication module is used for serial communication, and the second communication module is used for TWI communication.

[0027] The model of the main control chip is ATMEGA128, which is an AVR 8-bit microprocessor chip. It adopts advanced RISC structure, AVR core, 16MHz operating frequency, and 2.7-5.5V operating voltage. The model of the peripheral chip is ATMEGA16, which belongs to the AVR series of single-chip microcomputers. AVR adopts Harvard structure, that is, the program and data buses are separated, and it has the function of pre-fetching instructions. ATmega16 has 16K bytes of program memory Flash. Because all instructions are 16 or 32 bits wide, the structure of Flash is 8K×16.

[0028] like Figure 2 As shown, the main control circuit is electrically connected to the first communication module, and the main control circuit can communicate serially with the first communication module. Through the first communication module, the main control circuit sends a control instruction to the peripheral chip through the first communication module, and the peripheral chip controls the driving device according to the control instruction, and the driving device controls the second type of flying probe needle. The second type of flying probe needle moves along the X-axis direction and the Y-axis direction above the circuit board. Since the electronic components on the circuit board are distributed in a plane, the electronic components need to be positioned in the plane, so the operation of the second type of flying probe needle is relatively complicated.

[0029] The second communication module includes the SCL pin and the SDA pin of the main control chip. The second communication module adopts the TWI communication protocol, which is a two-wire communication protocol. The SCL pin is used to send a serial clock signal, and the SDA pin is used to send serial data. The second communication module is electrically connected to the first type of flying probe needle head, which moves along the Z-axis direction, i.e., the height direction, above the circuit board. Since the electronic components on the circuit board are distributed in a plane, there are no obstacles in the height direction, so the operation of the first type of flying probe needle head is relatively simple.

[0030] The first communication module is used to control the second type of flying probe needle to move along the X-axis and Y-axis directions, and the second communication module is used to control the first type of flying probe needle to move along the Z-axis direction. The second communication module is based on the SCL pin and SDA pin of the main control chip. Compared with using the first communication module to control the first type of flying probe needle, the number of electronic components used can be reduced, thereby simplifying the structure of the flying probe control circuit and reducing the cost of the flying probe control circuit. The combination of the first communication module and the second communication module can be applied to scenarios combining complex control and simple control.

[0031] A flying probe control circuit provided in this embodiment includes a main control circuit and a peripheral circuit, wherein the main control circuit includes a main control chip; the peripheral circuit includes a peripheral chip and a driving device, a first communication module is electrically connected to the peripheral chip and the main control chip, and a second communication module is electrically connected to a first type of flying probe needle head; the peripheral chip is electrically connected to the driving device, and the driving device is used to control a second type of flying probe needle head; wherein the first communication module is used for serial communication, and the second communication module is used for TWI communication. The main control chip controls the first communication module to send instructions to the peripheral chip through serial communication, the peripheral chip controls the driving device, and the driving device controls the second type of flying probe needle head. The serial communication method is suitable for complex control of the flying probe needle head. The main control chip controls the second communication module to control the first type of flying probe needle head through TWI communication. The TWI communication method is relatively simple and suitable for simple control of the flying probe needle head. Combining TWI communication and serial communication, it can be applied to the scene combining complex control and simple control, reducing the occupation of single-chip microcomputer computing resources.

[0032] Example 2

[0033] like Figure 1-Figure 6 As shown, this embodiment provides a flying probe control circuit, including a main control circuit and a peripheral circuit, the main control circuit including a main control chip; the peripheral circuit including a peripheral chip and a driving device, a first communication module is electrically connected to the peripheral chip and the main control chip, and a second communication module is electrically connected to a first type of flying probe needle head; the peripheral chip is electrically connected to the driving device, and the driving device is used to control a second type of flying probe needle head; wherein, the first communication module is used for serial communication, and the second communication module is used for TWI communication.

[0034] The first communication module includes a FT245 chip, and an input end of the first communication module is electrically connected to a first output end of the main control chip.

[0035] The FT245 chip has a high-speed data transmission rate and multiple data transmission modes. The transmission speed reaches 1Mbits, which can meet the needs of different external devices.

[0036] The TXD pin of the FT245 chip is electrically connected to the D7 pin of the main control chip, and the TXD pin is used to send data to the D7 pin of the main control chip. The RXD pin of the FT245 chip is electrically connected to the D6 pin of the main control chip, and the RXD pin is used to receive data sent by the D6 pin of the main control chip. The RTS pin of the FT245 chip is electrically connected to the D5 pin of the main control chip. When the RTS pin is at a low level, it means that the FT245 chip is ready to receive data. The CTS pin of the FT245 chip is electrically connected to the D4 pin of the main control chip. When the CTS pin is at a low level, it means that the FT245 chip can send data to the main control chip.

[0037] The second communication module includes the SCL pin and the SDA pin of the main control chip. The SCL pin is used to synchronize the clock, and the SDA pin is used to transmit data. The second communication module is electrically connected to the first type of flying probe needle head, and the main control chip controls the first type of flying probe needle head to move along the Z axis.

[0038] The model of the peripheral chip is ATMEGA16, and the output end of the peripheral chip is electrically connected to the input end of the motor drive chip; the first input end of the peripheral chip is electrically connected to the second communication module, the second input end of the peripheral chip is electrically connected to the sampling circuit, and the third input end of the peripheral chip is electrically connected to the sensor.

[0039] The first input end of the peripheral chip includes a PC0 / SCL pin and a PC1 / SDA pin. The PC0 / SCL pin of the peripheral chip is electrically connected to the SCL pin of the main control chip, and the PC1 / SDA pin of the peripheral chip is electrically connected to the SDA pin of the main control chip.

[0040] The model of the motor driver chip is A3977SLP. This embodiment takes the motor driver chip controlling the stepper motor as an example. The STEP pin of the motor driver chip is electrically connected to the PA3 / ADC3 pin of the peripheral chip, and the STEP pin is used to control the step length of the stepper motor. The DIR pin of the motor driver chip is electrically connected to the PA4 / ADC4 pin of the peripheral chip, and the DIR pin is used to control the rotation direction of the stepper motor. The MS1 pin of the motor driver chip is electrically connected to the PA6 / ADC6 pin of the peripheral chip, and the MS2 pin of the motor driver chip is electrically connected to the PA7 / ADC7 pin of the peripheral chip. The peripheral chip sets the subdivision mode of the stepper motor by controlling the level of the MS1 pin and the MS2 pin.

[0041] The third input end of the peripheral chip includes PD4 / OC1B pin, PD5 / OC1A pin, PD6 / ICP1 pin and PD7 / OC2 pin, PD4 / OC1B pin is electrically connected to the third interface of the first row of plugs J17 through the first current limiting resistor R154, PD5 / OC1A pin is electrically connected to the second interface of the first row of plugs J17 through the second current limiting resistor R153, PD6 / ICP1 pin is electrically connected to the fourth interface of the first row of plugs J17 through the third current limiting resistor R155, and PD7 / OC2 pin is electrically connected to the fifth interface of the first row of plugs J17 through the fourth current limiting resistor R156. The first row of plugs J17 is electrically connected to a photoelectric sensor, which is arranged near the circuit board and is used to detect whether the first type flying probe needle and the second type flying probe needle are in place.

[0042] The sampling circuit includes a sampling chip, an input end of the sampling chip is electrically connected to the first type flying probe needle and the second type flying probe needle, and an output end of the sampling chip is electrically connected to the sampling end of the peripheral chip; the sampling chip is used to convert an analog sampling signal into a digital sampling signal and send the digital sampling signal to the sampling end of the peripheral chip.

[0043] The sampling chip model is AD7495, the Vdrive pin of the sampling chip is electrically connected to the 5V power supply, the SCLK pin of the sampling chip is electrically connected to the PB7 / SCK pin of the peripheral chip, and the SDATA pin of the sampling chip is electrically connected to the BP6 pin. The CS pin of the sampling chip is electrically connected to the PB4 / SS pin of the peripheral chip, and the CS pin is used to send the current after analog-to-digital conversion to the PB4 / SS pin.

[0044] The driving device includes a plurality of motors, the motor driving chip is electrically connected to the corresponding motors, and the motors are used to control the corresponding second-type flying probe needles.

[0045] In this embodiment, the motor is a stepper motor as an example. The four pins OUT1A, OUT1B, OUT2A and OUT2B of the motor driver chip are electrically connected to the second row of plugs J1, and the second row of plugs J1 is electrically connected to multiple motors. The second type of flying probe needle moves above the circuit board or close to the circuit board along the X-axis and Y-axis directions, that is, it moves within the plane of the circuit board. Since the electronic components are distributed within the plane of the circuit board, the second type of flying probe needle may touch the electronic components during the movement, and the movement of the second type of flying probe needle is more complicated. Multiple stepper motors are controlled by the motor driver chip, and the second type of flying probe needle is controlled under the joint action of multiple stepper motors.

[0046] The model of the peripheral chip of the flying probe control circuit of this embodiment is ATMEGA16, and the output end of the peripheral chip is electrically connected to the input end of the motor drive chip; the first input end of the peripheral chip is electrically connected to the second communication module, the second input end of the peripheral chip is electrically connected to the sampling circuit, and the third input end of the peripheral chip is electrically connected to the sensor. The driving device includes a plurality of motors, and the motor drive chip is electrically connected to the corresponding motors, and the motor is used to control the corresponding second type flying probe needle. The second communication module sends a motor control instruction to the peripheral chip, and the peripheral chip sends the motor control instruction to the motor drive chip. The motor drive chip controls the corresponding motor according to the motor control instruction, and the motor controls the corresponding second type flying probe needle to move along the X-axis and the Y-axis.

[0047] Example 3

[0048] like Figure 1-Figure 6 As shown, this embodiment provides a flying probe control circuit, including a main control circuit and a peripheral circuit, the main control circuit including a main control chip; the peripheral circuit including a peripheral chip and a driving device, a first communication module is electrically connected to the peripheral chip and the main control chip, and a second communication module is electrically connected to a first type of flying probe needle head; the peripheral chip is electrically connected to the driving device, and the driving device is used to control a second type of flying probe needle head; wherein, the first communication module is used for serial communication, and the second communication module is used for TWI communication.

[0049] The first communication module includes a FT245 chip, and an input end of the first communication module is electrically connected to a first output end of the main control chip.

[0050] The first communication terminal of the main control chip is electrically connected to the first communication module, and the first communication module is electrically connected to the USB interface of the computer.

[0051] The first communication terminal of the main control chip includes a PC0 / A8 pin and a PC1 / A9 pin, wherein the PC0 / A8 pin is electrically connected to the TXD pin of the FT245 chip, and the PC1 / A9 pin is electrically connected to the RXD pin of the FT245 chip. The TXD pin of the FT245 chip is used to send data, and the RXD pin of the FT245 chip is used to receive data.

[0052] The USBDM pin of the FT245 chip is electrically connected to the D- terminal of the USB interface of the computer, and the USBDP pin is electrically connected to the D+ terminal of the USB interface of the computer. The main control chip communicates serially with the USB interface of the computer through the FT245 chip. When the user operates the flying probe control software of the computer, the USB interface sends the instructions of the flying probe control software to the FT245 chip, and the FT245 chip sends the instructions of the flying probe control software to the main control chip.

[0053] The peripheral chip is electrically connected to the input end of the test voltage switch circuit, the output end of the test voltage switch circuit is electrically connected to the second type flying probe needle, and the test voltage switch circuit is used to test the voltage of the second type flying probe needle.

[0054] The test voltage switch circuit includes a first NMOS transistor Q38 and a second NMOS transistor Q36. The gate of the first NMOS transistor Q38 is electrically connected to the PB2 / AIN0 / INT2 pin of the peripheral chip, and the gate of the second NMOS transistor Q36 is electrically connected to the PB1 / T1 pin of the peripheral chip.

[0055] The drain of the first NMOS tube Q38 is electrically connected to the gate of the third NMOS tube Q37A and the gate of the first PMOS tube Q37B, the drain of the third NMOS tube Q37A and the source of the first PMOS tube Q37B are electrically connected to the anode of the first test diode D49, and the cathode of the first test diode D49 is electrically connected to the second type flying probe needle.

[0056] The drain of the second NMOS transistor Q36 is electrically connected to the gate of the fourth NMOS transistor Q35 , the source of the fourth NMOS transistor Q35 is electrically connected to the anode of the second test diode D48 , and the cathode of the second test diode D48 is electrically connected to the second type flying probe needle.

[0057] The peripheral chip controls the first NMOS tube Q38 and the second NMOS tube Q36 to be turned on, thereby testing the voltage of the second type of flying probe needle; the peripheral chip controls the first NMOS tube Q38 and the second NMOS tube Q36 to be turned on and off, and stops testing the voltage of the second type of flying probe needle.

[0058] like Figure 5-Figure 6 As shown, the flying probe control circuit also includes a first power supply module and a second power supply module, the input end of the first power supply module is electrically connected to a 24V power supply, and the output end of the first power supply module outputs a 5V power supply; the input end of the second power supply module is electrically connected to the 24V power supply, and the output end of the second power supply module outputs a 15V power supply.

[0059] The first power supply module includes a first power chip U18, and the model of the first power chip U18 is LM2676-5.0. The input terminal +Vin of the first power chip U18 is electrically connected to a 24V power supply, and the output terminal Output of the first power chip U18 is electrically connected to a first terminal of the power module inductor L3, and the second terminal of the power module inductor L3 outputs a 5V power supply, and the 5V power supply supplies power to the VCC pin, AVCC pin of the main control chip and the VCC pin of the peripheral chip.

[0060] The second power supply module includes a second power supply chip U17, the input terminal Vin of the second power supply chip U17 is electrically connected to a 24V power supply, the first output terminal +Vo of the second power supply chip U17 outputs a +15V power supply, the second output terminal -Vo of the second power supply chip U17 outputs a -15V power supply, and the +15V power supply and -15V power supply supply power to the operational amplifier.

[0061] The input terminal Vin of the sampling chip is electrically connected to the output terminal of the sampling operational amplifier through the operational amplifier output resistor R91, and the in-phase input terminal of the sampling chip is electrically connected to the second end of the first sampling resistor R90; the first end of the first sampling resistor R90 is electrically connected to the first type of flying probe needle or the second type of flying probe needle, the second end of the first sampling resistor R90 is electrically connected to the first end of the second sampling resistor R95, and the second end of the second sampling resistor R95 is grounded.

[0062] The sampling operational amplifier amplifies the current of the first type flying probe needle or the second type flying probe needle, and then outputs the amplified current to the input end of the sampling chip. The amplified current is an analog current signal. The sampling chip converts the analog current signal into a digital current signal, and finally sends the digital current signal to the peripheral chip.

[0063] The first communication terminal of the main control chip of the flying probe control circuit provided in this embodiment is electrically connected to the first communication module, and the first communication module is electrically connected to the USB interface of the computer. The peripheral chip is electrically connected to the input terminal of the test voltage switch circuit, and the output terminal of the test voltage switch circuit is electrically connected to the second type of flying probe needle head, and the test voltage switch circuit is used to test the voltage of the second type of flying probe needle head. The main control chip communicates serially with the USB interface of the computer through the first communication module, and the peripheral chip controls the test voltage switch circuit to be turned on, thereby measuring the voltage of the second type of flying probe needle head.

[0064] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the subsequent accompanying drawings.

[0065] It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would then be positioned "below" or "below" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0066] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0067] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A flying probe control circuit, characterized in that: It includes a main control circuit and a peripheral circuit, the main control circuit includes a main control chip; the peripheral circuit includes a peripheral chip and a driving device, a first communication module is electrically connected to the peripheral chip and the main control chip, and a second communication module is electrically connected to a first type of flying probe needle head; the peripheral chip is electrically connected to the driving device, and the driving device is used to control a second type of flying probe needle head; wherein the first communication module is used for serial communication, and the second communication module is used for TWI communication.

2. The flying probe control circuit according to claim 1, characterized in that: The first communication module includes a FT245 chip, and an input end of the first communication module is electrically connected to a first output end of the main control chip.

3. The flying probe control circuit according to claim 1, characterized in that: The second communication module includes the SCL pin and the SDA pin of the main control chip.

4. The flying probe control circuit according to claim 1, characterized in that: The model of the peripheral chip is ATMEGA16, and the output end of the peripheral chip is electrically connected to the input end of the motor drive chip; the first input end of the peripheral chip is electrically connected to the second communication module, the second input end of the peripheral chip is electrically connected to the sampling circuit, and the third input end of the peripheral chip is electrically connected to the sensor.

5. The flying probe control circuit according to claim 4, characterized in that: The driving device includes a plurality of motors, the motor driving chip is electrically connected to the corresponding motors, and the motors are used to control the corresponding second-type flying probe needles.

6. The flying probe control circuit according to claim 4, characterized in that: The sampling circuit includes a sampling chip, an input end of the sampling chip is electrically connected to the first type flying probe needle and the second type flying probe needle, and an output end of the sampling chip is electrically connected to the sampling end of the peripheral chip; the sampling chip is used to convert an analog sampling signal into a digital sampling signal and send the digital sampling signal to the sampling end of the peripheral chip.

7. The flying probe control circuit according to claim 1, characterized in that: The first communication terminal of the main control chip is electrically connected to the first communication module, and the first communication module is electrically connected to the USB interface of the computer.

8. The flying probe control circuit according to claim 6, characterized in that: The peripheral chip is electrically connected to the input end of the test voltage switch circuit, the output end of the test voltage switch circuit is electrically connected to the second type flying probe needle, and the test voltage switch circuit is used to test the voltage of the second type flying probe needle.

9. The flying probe control circuit according to claim 1, characterized in that: It also includes a first power supply module and a second power supply module, the input end of the first power supply module is electrically connected to a 24V power supply, and the output end of the first power supply module outputs a 5V power supply; the input end of the second power supply module is electrically connected to the 24V power supply, and the output end of the second power supply module outputs a 15V power supply.

10. The flying probe control circuit according to claim 6, characterized in that: The input end of the sampling chip is electrically connected to the output end of the sampling operational amplifier, and the non-inverting input end of the sampling operational amplifier is electrically connected to the second end of the first sampling resistor; the first end of the first sampling resistor is electrically connected to the first type of flying probe needle or the second type of flying probe needle, the second end of the first sampling resistor is electrically connected to the first end of the second sampling resistor, and the second end of the second sampling resistor is grounded.

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