Wheel set shaft end image acquisition device

Abstract

The utility model discloses a wheel set shaft end image acquisition device. Existing wheel set shaft end mark recognition work mainly depends on manual human eye recognition of mark characters and manual input of a system, the process is tedious, and efficiency is low. The utility model relates to a wheel set shaft end image acquisition device. The acquisition device comprises two acquisition units and a host. A shooting window is formed in the vertical surface of one side of the device box body of each acquisition unit, a ring-shaped light source group is arranged around the shooting window, and a camera is mounted on a stand column in the device box body; an Ethernet module, a power supply module, a power conversion module and an I / O module which are connected with the processor are mounted on the bottom surface in the device box body; the pressure switch is arranged on the track, the pressure switch is connected to an input port of the I / O module through a signal line, and an output port of the I / O module is connected with the camera; and the Ethernet module is connected with the host. According to the utility model, the wheel set shaft end image can be automatically collected, and the precision of the shot wheel set shaft end image is high.

Description

Technical Field

[0001] The utility model relates to an image acquisition device, in particular to a wheelset axle end image acquisition device. Background Art

[0002] Trains are essential vehicles for rail transportation, and wheelsets are crucial components of the train's running mechanism. Their technical condition is directly related to vehicle safety. When a train travels at high speeds, the wheelsets must withstand the enormous static and dynamic loads transmitted between the train and the rails. This wear and tear can occur over time, necessitating regular wheelset inspection and maintenance.

[0003] During train wheel maintenance, it's necessary to identify the markings engraved on the axle ends. These markings include manufacturing and maintenance marks, which need to be recorded and distinguished during maintenance. Currently, axle end marking recognition relies primarily on manual human eye recognition and input into the system, a cumbersome and inefficient process.

[0004] The utility model proposes a device for collecting images of wheelset axle ends. The device is installed next to a maintenance production line. The device triggers a processor through a switch signal, and the processor controls an industrial camera and a light source to complete the work of capturing the axle end image. Summary of the Invention

[0005] The purpose of the utility model is to solve the problem that the existing wheelset axle end mark recognition work mainly relies on manual eye recognition of mark characters and manual entry into the system, which is a cumbersome and inefficient process, and to provide a wheelset axle end image acquisition device.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A wheelset axle end image acquisition device, the acquisition device includes two acquisition units and a host; each acquisition unit includes a device box, a pressure switch, a processor, a light source group, an Ethernet module, a power supply module, a power conversion module, an I / O module and a camera; wherein,

[0008] A shooting window is provided on one side of the device housing, a light source group is arranged around the shooting window, a column is provided inside the device housing, a camera is slidably mounted on the column, and the vertical height of the camera is adapted to the shooting window; a processor, an Ethernet module, a power supply module, a power conversion module, and an I / O module are installed on the bottom surface of the device housing;

[0009] The pressure switch is set on the track, and the pressure switch is connected to the input port of the I / O module through a signal line. The output port of the I / O module is connected to the camera; the processor is connected to the Ethernet module, the power conversion module, and the I / O module. The power conversion module is connected to the power supply module, the power supply module is connected to the light source group, and the Ethernet module is connected to the host;

[0010] The light source group includes a group of strip light bands, and the strip light bands are arranged in sequence from head to tail to form a circle.

[0011] Furthermore, the camera is slidably mounted on the column via a sliding device, the sliding device comprising a circular hoop and a set of fastening members, the fastening members comprising a handle and an arc-shaped plug-in, the middle portion of the handle being connected to the fixed end of the arc-shaped plug-in, the fixed end of the handle being fixed to the outer side wall of the circular hoop via a rotating shaft, and the fixed end of the handle, the circle where the outer arc of the arc-shaped plug-in is located, and the rotating shaft being coaxially arranged; wherein,

[0012] The hoop is of circular shape;

[0013] The radius of the outer arc of the arc plug-in remains unchanged, and the radius of the inner arc of the arc plug-in gradually increases from the connection with the handle to the movable end, and a wedge block is set on the outer arc of the arc plug-in, the inner and outer sides of the wedge block are arc-shaped, and the thin end of the wedge block faces the movable end of the arc plug-in.

[0014] Furthermore, the number of the strip light bands is 4-8.

[0015] Furthermore, the number of the strip-shaped light bands is 6.

[0016] Furthermore, the number of the fastening parts is 2-4.

[0017] Furthermore, the number of the fastening parts is 3.

[0018] Furthermore, the power conversion module includes an L7812CV-DG linear regulator and an SPX3819 low dropout regulator;

[0019] The No. 1 input port of the L7812CV-DG linear regulator is connected to the VDD power supply through fuse F1, the No. 2 GND port is grounded, and the No. 3 output port is grounded through capacitor C26. Between the No. 1 input port of the L7812CV-DG linear regulator and fuse F1, the No. 1 input port is grounded through capacitor C25. The No. 1 input port of the L7812CV-DG linear regulator is also grounded through capacitor C9.

[0020] The No. 1 VIN port of the SPX3819 low-voltage dropout regulator is connected to the VDD power supply, the No. 3 EN port is connected to the VDD power supply through the R5 resistor, the No. 2 GND port is grounded, the No. 4 BYP port is not connected, and the No. 5 VOUT port is connected to the C6 capacitor and the C7 capacitor respectively. The other end of the C6 capacitor is grounded, and one end of the C7 capacitor is also connected to another VDD power supply, and the other end of the C7 capacitor is grounded.

[0021] Furthermore, the processor includes an XH_2.54_5P terminal block connector and an STM32 microcontroller, wherein port 72 of the STM32 microcontroller is connected to the mode selector TMS, port 76 is connected to the clock TCK, port 77 is connected to the data input TDI, port 89 is connected to the data output TDO, and port 90 is connected to the reset signal NTRST.

[0022] Port 51 is connected to the communication chip select signal line SPI CS, port 52 is connected to the serial clock signal, port 53 is connected to the master device input / slave device output pin SPI_MISO, and port 54 is connected to the master device output / slave device input pin SPI_MOSI; port 63 is connected to the sensing serial interface interrupt signal ‌SPI_INT, port 64 is connected to the reset signal SPI_RST, port 81 is connected to the output current terminal IOA, port 83 is connected to the output current terminal IOC, port 85 is connected to the output current terminal IOB, port 87 is connected to the output current terminal IOD, and port 97 PE0 is connected to the output current terminal IOE; port 10, port 27, port 49, port 74, and port 99 are connected to the circuit common ground terminal GND, and VDD ports 11, 28, 50, 75, and 100 are connected to the digital power supply voltage VDD;

[0023] BOOT0 port 94 is grounded, VREF+ port 21 and VDDA port 22 are connected to capacitor C5, capacitor C4, and one end of inductor L1. The other end of inductor L1 is grounded, and the other ends of capacitors C5, C4, and BOOT0 port 94 are grounded at the same time.

[0024] 19 VSSA and 20 VREF- ports are grounded at the same time;

[0025] A capacitor C1, line 12, and line 34 are connected in parallel between NRST port 14 and the ground terminal, and line 12 and line 34 are connected via switch SW1. One end of capacitor C1 connected to NRST port 14 is also connected to resistor R1, and the other end of resistor R1 is grounded.

[0026] A crystal oscillator X2 is connected between the No. 13 OSC_OUT terminal and the No. 12 OSC_IN terminal. Both ends of the crystal oscillator X2 are grounded through capacitors C2 and C3, respectively.

[0027] Furthermore, the I / O module includes a pz254v-12-14p pin header H1 and LTV-2474 channel optocoupler isolators U7 and U8;

[0028] The 12th and 14th ports of the pz254v-12-14p pin header are grounded, the 11th and 13th ports are connected to the VDD power supply, the 1st, 3rd, 5th, 7th and 9th ports are connected to the output current terminal IOA+, the output current terminal IOB+, the output current terminal IOC+, the output current terminal IOD+ and the output current terminal IOE+ respectively, the 2nd, 4th, 6th, 8th and 10th ports are connected to the output current terminal IOA-, the output current terminal IOB-, the output current terminal IOC-, the output current terminal IOD- and the output current terminal IOE- respectively;

[0029] Ports 2, 4, 6, and 8 of the LTV-2474 channel optocoupler isolator U7 are connected to the output current terminal IOA, output current terminal IOB, output current terminal IOC, and output current terminal IOD, respectively; ports 1, 3, 5, and 7 are connected to one end of the resistor R19, and the other end of the resistor R19 is grounded; ports 16, 14, 12, and 10 are connected to the output current terminal IOA+, output current terminal IOB+, output current terminal IOC+, and output current terminal IOD+, respectively; ports 15, 13, 11, and 9 are connected to the output current terminal IOA-, output current terminal IOB-, output current terminal IOC-, and output current terminal IOD-, respectively;

[0030] Port 1 of the LTV-2474 channel optocoupler isolator U8 is connected to the output current terminal IOE+, port 2 is connected to the output current terminal IOE-, port 15 is connected to the output current terminal IOE, and ports 16, 14, 12, and 10 are grounded at the same time through resistor R18. Beneficial effects

[0031] 1. This utility model integrates a processor, Ethernet module, power conversion module, and I / O module into a controller. The controller and switching power supply are integrated into a single housing, with a side window for a camera to capture images. This device is placed on either side of the wheelset's track, allowing for imaging of the wheelset's axle ends and facilitating installation on existing maintenance lines.

[0032] 2. The controller of the present invention controls the four light strips to switch on and off in sequence by presetting the existing opening and closing control program, and captures the shaft end images at different lighting angles, thereby maximizing the accuracy of capturing the wheel shaft end images.

[0033] 3. The utility model has a network transmission function, can be connected to the industrial network of the maintenance plant, and communicate with the host of image recognition. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0035] Figure 2 This is a control principle block diagram involved in the utility model;

[0036] Figure 3 This is a schematic structural diagram of the sliding device involved in the utility model;

[0037] Figure 4 This is a power conversion circuit diagram involved in the utility model;

[0038] Figure 5 This is a peripheral circuit diagram of the STM32 single-chip microcomputer involved in the utility model;

[0039] Figure 6 This is a circuit diagram of the I / O module involved in the present utility model;

[0040] Figure 7 This is a circuit diagram of the Ethernet module involved in the present utility model;

[0041] Figure 8 This is a situation where the utility model is applied to capture image information on both sides of the wheels on both sides of the track. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments 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. Specific implementation method one:

[0044] The utility model discloses a wheel set axle end image acquisition device, which includes two acquisition units and a host 1; each acquisition unit includes a device box 2, a pressure switch 3, a processor 4, a light source group 5, an Ethernet module 7, a power supply module 8, a power conversion module 9, an I / O module 10 and a camera 11; wherein,

[0045] like Figure 1 As shown, a shooting window 12 is provided on one side of the vertical surface of the device housing 2, and a light source group 5 is arranged around the shooting window 12. A column 19 is provided inside the device housing 2, and a camera 11 is slidably installed on the column 19. The vertical height of the camera 11 is adapted to the shooting window 12. A processor 4, an Ethernet module 7, a power supply module 8, a power conversion module 9, and an I / O module 10 are installed on the bottom surface of the device housing 2. The processor 4, the Ethernet module 7, the power conversion module 9, and the I / O module 10 are integrated into a controller 20, which is arranged inside the device housing 2 and integrated with the device housing 2 to improve the integrity of the device.

[0046] like Figure 2 As shown, the pressure switch 3 is set on the track, the pressure switch 3 is connected to the input port of the I / O module 10 through a signal line, the output port of the I / O module 10 is connected to the camera 11, and the pressure switch 3 transmits data to the I / O module 10 through the signal line; the processor 4 is connected to the Ethernet module 7, the power conversion module 9, and the I / O module 10, the power conversion module 9 is connected to the power supply module 8, the power supply module 8 is connected to the light source group 5, the processor 4 is connected to the host 1 through the Ethernet module 7, and the wheelset axle end image captured by the camera 11 is transmitted to the host 1 through the Ethernet module 7;

[0047] The light source group 5 includes a group of strip light strips 6 , and the strip light strips 6 are arranged end to end in a circle. Specific implementation method 2:

[0049] Different from the first embodiment, the present invention is a wheel set axle end image acquisition device, wherein the camera 11 is slidably mounted on the column 19 by a sliding device, and the height of the camera 11 on the column 19 is adjusted by the sliding device to align with the shooting window 12, such as Figure 3 As shown, the sliding device includes a hoop 13 and a set of fastening members, the fastening members include a handle 14 and an arc-shaped plug-in 15, the middle part of the handle 14 is connected to the fixed end of the arc-shaped plug-in 15, the fixed end of the handle 14 is fixed to the outer wall of the hoop 13 through a rotating shaft 16, and the fixed end of the handle 14, the circle where the outer arc of the arc-shaped plug-in 15 is located, and the rotating shaft 16 are coaxially arranged; wherein,

[0050] The hoop 13 is annular, and the camera 11 is disposed on the outer side wall of the hoop 13;

[0051] The outer radius of the arc-shaped insert 15 remains constant, while the inner radius of the arc-shaped insert 15 gradually increases from the connection with the handle 14 to the movable end, forming a shape that tapers from the fixed end to the other end of the arc-shaped insert 15, which facilitates insertion into the inner ring of the circular hoop 13. A wedge-shaped block 17 is provided on the outer arc of the arc-shaped insert 15. The inner and outer sides of the wedge-shaped block 17 are arc-shaped, and the thin end of the wedge-shaped block 17 faces the movable end of the arc-shaped insert 15. This facilitates replacement and maintenance of the camera 11. Specific implementation method three:

[0053] What is different from the second specific embodiment is that in the wheelset axle end image acquisition device of the present invention, the number of the strip light bands 6 is 4-8. Specific implementation method four:

[0055] What is different from the third specific embodiment is that in the wheelset axle end image acquisition device of the present invention, the number of the strip-shaped light bands 6 is 6. Specific implementation method five:

[0057] What is different from the fourth specific embodiment is that in the wheelset axle end image acquisition device of the present invention, the number of the fastening parts is 2-4. Specific implementation method six:

[0059] What is different from the fifth specific embodiment is that in the wheelset axle end image acquisition device of the present invention, the number of the fastening parts is 3. Specific implementation method seven:

[0061] Different from the sixth embodiment, the present invention is a wheel set axle end image acquisition device, the circuit diagram of the power conversion module 9 is as follows Figure 4 As shown, it includes L7812CV-DG linear regulator and SPX3819 low dropout regulator;

[0062] The No. 1 input port of the L7812CV-DG linear regulator is connected to the VDD power supply through fuse F1, the No. 2 GND port is grounded, and the No. 3 output port is grounded through capacitor C26. Between the No. 1 input port of the L7812CV-DG linear regulator and fuse F1, the No. 1 input port is grounded through capacitor C25. The No. 1 input port of the L7812CV-DG linear regulator is also grounded through capacitor C9.

[0063] The No. 1 VIN port of the SPX3819 low-voltage dropout regulator is connected to the VDD power supply, the No. 3 EN port is connected to the VDD power supply through the R5 resistor, the No. 2 GND port is grounded, the No. 4 BYP port is not connected, and the No. 5 VOUT port is connected to the C6 capacitor and the C7 capacitor respectively. The other end of the C6 capacitor is grounded, and one end of the C7 capacitor is also connected to another VDD power supply, and the other end of the C7 capacitor is grounded. Specific implementation method eight:

[0065] Different from the specific embodiment 7, the present invention is a wheel set axle end image acquisition device, the processor 4 includes an XH_2.54_5P terminal connector and an STM32 single chip microcomputer, the peripheral circuit diagram of the STM32 single chip microcomputer is as follows Figure 5 As shown, the connection mode of port 72 of the STM32 microcontroller is TMS, port 76 is connected to the clock TCK, port 77 is connected to the data input TDI, port 89 is connected to the data output TDO, and port 90 is connected to the reset signal NTRST.

[0066] Port 51 is connected to the communication chip select signal line SPI CS, port 52 is connected to the serial clock signal, port 53 is connected to the master device input / slave device output pin SPI_MISO, and port 54 is connected to the master device output / slave device input pin SPI_MOSI; port 63 is connected to the sensing serial interface interrupt signal ‌SPI_INT, port 64 is connected to the reset signal SPI_RST, port 81 is connected to the output current terminal IOA, port 83 is connected to the output current terminal IOC, port 85 is connected to the output current terminal IOB, port 87 is connected to the output current terminal IOD, and port 97 PE0 is connected to the output current terminal IOE; port 10, port 27, port 49, port 74, and port 99 are connected to the circuit common ground terminal GND, and VDD ports 11, 28, 50, 75, and 100 are connected to the digital power supply voltage VDD;

[0067] BOOT0 port 94 is grounded, VREF+ port 21 and VDDA port 22 are connected to capacitor C5, capacitor C4, and one end of inductor L1. The other end of inductor L1 is grounded, and the other ends of capacitors C5, C4, and BOOT0 port 94 are grounded at the same time.

[0068] 19 VSSA and 20 VREF- ports are grounded at the same time;

[0069] A capacitor C1, line 12, and line 34 are connected in parallel between NRST port 14 and the ground terminal, and line 12 and line 34 are connected via switch SW1. One end of capacitor C1 connected to NRST port 14 is also connected to resistor R1, and the other end of resistor R1 is grounded.

[0070] A crystal oscillator X2 is connected between the No. 13 OSC_OUT terminal and the No. 12 OSC_IN terminal. Both ends of the crystal oscillator X2 are grounded through capacitors C2 and C3, respectively. Specific implementation method nine:

[0072] Different from the specific embodiment 8, the present invention is a wheel set axle end image acquisition device, the circuit diagram of the I / O module 10 is as follows Figure 6 As shown, the I / O module 10 includes a pz254v-12-14p pin header H1 and LTV-2474 channel optocoupler isolators U7 and U8;

[0073] The 12th and 14th ports of the pz254v-12-14p pin header are grounded, the 11th and 13th ports are connected to the VDD power supply, the 1st, 3rd, 5th, 7th and 9th ports are connected to the output current terminal IOA+, the output current terminal IOB+, the output current terminal IOC+, the output current terminal IOD+ and the output current terminal IOE+ respectively, the 2nd, 4th, 6th, 8th and 10th ports are connected to the output current terminal IOA-, the output current terminal IOB-, the output current terminal IOC-, the output current terminal IOD- and the output current terminal IOE- respectively;

[0074] Ports 2, 4, 6, and 8 of the LTV-2474 channel optocoupler isolator U7 are connected to the output current terminal IOA, output current terminal IOB, output current terminal IOC, and output current terminal IOD, respectively; ports 1, 3, 5, and 7 are connected to one end of the resistor R19, and the other end of the resistor R19 is grounded; ports 16, 14, 12, and 10 are connected to the output current terminal IOA+, output current terminal IOB+, output current terminal IOC+, and output current terminal IOD+, respectively; ports 15, 13, 11, and 9 are connected to the output current terminal IOA-, output current terminal IOB-, output current terminal IOC-, and output current terminal IOD-, respectively;

[0075] Port 1 of the LTV-2474 channel optocoupler isolator U8 is connected to the output current terminal IOE+, port 2 is connected to the output current terminal IOE-, port 15 is connected to the output current terminal IOE, and ports 16, 14, 12, and 10 are grounded at the same time through resistor R18.

[0076] Working principle:

[0077] like Figure 1-8 As shown, when the number of strip light strips 6 is 4, the utility model is arranged on both sides of the track in the image acquisition area, and the acquisition device starts working after being powered on. When the wheelset 21 travels to the image acquisition area, it will trigger the pressure switch 3 installed on the track. The pressure switch 3 sends a switch signal to the I / O module 10, and the processor 4 turns on the strip light strips 6 installed on the periphery of the shooting window 12 in turn. Each light strip of the strip light strip 6 is turned on in sequence, and then turned off according to the set delay time. During the illumination period of each strip light strip 6, the camera 11 is triggered to shoot once through the I / O module 10, for a total of four times; after shooting and collecting image information, the shaft end image is transmitted to the host 1 for image recognition through the Ethernet module 7.

[0078] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A wheelset axle end image acquisition device, characterized by: The acquisition device includes two acquisition units and a host; each acquisition unit includes a device box, a pressure switch, a processor, a light source group, an Ethernet module, a power supply module, a power conversion module, an I / O module and a camera; wherein, A shooting window is provided on one side of the device housing, a light source group is arranged around the shooting window, a column is provided inside the device housing, a camera is slidably mounted on the column, and the vertical height of the camera is adapted to the shooting window; a processor, an Ethernet module, a power supply module, a power conversion module, and an I / O module are installed on the bottom surface of the device housing; The pressure switch is set on the track, and the pressure switch is connected to the I / O module through a signal line, and the I / O module is connected to the camera; the processor is connected to the Ethernet module, the power conversion module, and the I / O module, the power conversion module is connected to the power supply module, the power supply module is connected to the light source group, and the Ethernet module is connected to the host; The light source group includes a group of strip light bands, and the strip light bands are arranged in sequence from head to tail to form a circle.

2. The wheelset axle end image acquisition device according to claim 1, characterized in that: The camera is slidably mounted on the column via a sliding device, the sliding device comprising a circular hoop and a set of fastening members, the fastening members comprising a handle and an arc-shaped plug-in, the middle portion of the handle being connected to the fixed end of the arc-shaped plug-in, the fixed end of the handle being fixed to the outer side wall of the circular hoop via a rotating shaft, and the fixed end of the handle, the circle where the outer arc of the arc-shaped plug-in is located, and the rotating shaft being coaxially arranged; wherein, The hoop is of circular shape; The radius of the outer arc of the arc plug-in remains unchanged, and the radius of the inner arc of the arc plug-in gradually increases from the connection with the handle to the movable end, and a wedge block is set on the outer arc of the arc plug-in, the inner and outer sides of the wedge block are arc-shaped, and the thin end of the wedge block faces the movable end of the arc plug-in.

3. The wheelset axle end image acquisition device according to claim 2, characterized in that: The number of the strip light bands is 4-8.

4. The wheelset axle end image acquisition device according to claim 3, characterized in that: The number of the strip light bands is 6.

5. The wheelset axle end image acquisition device according to claim 4, characterized in that: The number of the fastening pieces is 2-4.

6. The wheelset axle end image acquisition device according to claim 5, characterized in that: The number of the fastening pieces is 3.

7. The wheelset axle end image acquisition device according to claim 6, characterized in that: The power conversion module includes an L7812CV-DG linear regulator and an SPX3819 low-dropout voltage regulator; The No. 1 input port of the L7812CV-DG linear regulator is connected to the VDD power supply through fuse F1, the No. 2 GND port is grounded, and the No. 3 output port is grounded through capacitor C26. Between the No. 1 input port of the L7812CV-DG linear regulator and fuse F1, the No. 1 input port is grounded through capacitor C25. The No. 1 input port of the L7812CV-DG linear regulator is also grounded through capacitor C9. The No. 1 VIN port of the SPX3819 low-voltage dropout regulator is connected to the VDD power supply, the No. 3 EN port is connected to the VDD power supply through the R5 resistor, the No. 2 GND port is grounded, the No. 4 BYP port is not connected, and the No. 5 VOUT port is connected to the C6 capacitor and the C7 capacitor respectively. The other end of the C6 capacitor is grounded, and one end of the C7 capacitor is also connected to another VDD power supply, and the other end of the C7 capacitor is grounded.

8. The wheelset axle end image acquisition device according to claim 7, characterized in that: The processor includes an XH_2.54_5P terminal block connector and an STM32 microcontroller, wherein port 72 of the STM32 microcontroller is connected to the mode selection TMS, port 76 is connected to the clock TCK, port 77 is connected to the data input TDI, port 89 is connected to the data output TDO, and port 90 is connected to the reset signal NTRST. Port 51 is connected to the communication chip select signal line SPI CS, port 52 is connected to the serial clock signal, port 53 is connected to the master device input / slave device output pin SPI_MISO, and port 54 is connected to the master device output / slave device input pin SPI_MOSI; port 63 is connected to the sensing serial interface interrupt signal ‌SPI_INT, port 64 is connected to the reset SPI_RST, port 81 is connected to the output current terminal IOA, port 83 is connected to the output current terminal IOC, port 85 is connected to the output current terminal IOB, port 87 is connected to the output current terminal IOD, and port 97 PE0 is connected to the output current terminal IOE; Ports 10, 27, 49, 74, and 99 are connected to the circuit common ground GND, and ports 11, 28, 50, 75, and 100 are connected to the digital power supply voltage VDD; BOOT0 port 94 is grounded, VREF+ port 21 and VDDA port 22 are connected to capacitor C5, capacitor C4, and one end of inductor L1. The other end of inductor L1 is grounded, and the other ends of capacitors C5, C4, and BOOT0 port 94 are grounded at the same time. 19 VSSA and 20 VREF- ports are grounded at the same time; A capacitor C1, line 12, and line 34 are connected in parallel between NRST port 14 and the ground terminal, and line 12 and line 34 are connected via switch SW1. One end of capacitor C1 connected to NRST port 14 is also connected to resistor R1, and the other end of resistor R1 is grounded. A crystal oscillator X2 is connected between the No. 13 OSC_OUT terminal and the No. 12 OSC_IN terminal. Both ends of the crystal oscillator X2 are grounded through capacitors C2 and C3, respectively.

9. The wheelset axle end image acquisition device according to claim 8, characterized in that: The I / O module includes a pz254v-12-14p pin header H1 and LTV-2474 channel optocoupler isolators U7 and U8; The 12th and 14th ports of the pz254v-12-14p pin header are grounded, the 11th and 13th ports are connected to the VDD power supply, the 1st, 3rd, 5th, 7th and 9th ports are connected to the output current terminal IOA+, the output current terminal IOB+, the output current terminal IOC+, the output current terminal IOD+ and the output current terminal IOE+ respectively, the 2nd, 4th, 6th, 8th and 10th ports are connected to the output current terminal IOA-, the output current terminal IOB-, the output current terminal IOC-, the output current terminal IOD- and the output current terminal IOE- respectively; Ports 2, 4, 6, and 8 of the LTV-2474 channel optocoupler isolator U7 are connected to the output current terminal IOA, output current terminal IOB, output current terminal IOC, and output current terminal IOD, respectively; ports 1, 3, 5, and 7 are connected to one end of the resistor R19, and the other end of the resistor R19 is grounded; ports 16, 14, 12, and 10 are connected to the output current terminal IOA+, output current terminal IOB+, output current terminal IOC+, and output current terminal IOD+, respectively; ports 15, 13, 11, and 9 are connected to the output current terminal IOA-, output current terminal IOB-, output current terminal IOC-, and output current terminal IOD-, respectively; Port 1 of the LTV-2474 channel optocoupler isolator U8 is connected to the output current terminal IOE+, port 2 is connected to the output current terminal IOE-, port 15 is connected to the output current terminal IOE, and ports 16, 14, 12, and 10 are grounded at the same time through resistor R18.

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