Automatic test tool for electrified railway contact network switch monitoring device

Abstract

The utility model discloses an automatic test tool for an electrified railway contact network switch monitoring device, and belongs to the technical field of test tools. Comprising an MCU, a system auxiliary circuit, a power conversion circuit, a YX test power switching circuit, a communication interface circuit connected with a to-be-tested monitoring device, a voice module, a remote signaling control output circuit and a remote control detection input circuit. According to the utility model, the monitoring device of the electrified railway contact network switch centralized monitoring system is automatically tested in the production process, the debugging time can be shortened, the debugging quality can be improved, the capability requirement of debugging personnel can be reduced, and the purpose of reducing the production cost can be finally achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of test tool, concretely relates to a kind of electrification railway contact network switch monitoring device automatic test tool. BACKGROUND

[0002] Contact network isolating switch in electrification railway contact network switch centralized monitoring system is important component in electric traction power supply system, mainly responsible for changing power supply operation mode, sectional operation and fault isolation function etc..With the rapid development of electrification railway, the demand for its remote monitoring and control is increasing, and 8-12 monitoring devices need to be installed in each monitoring system screen, and the following problems or deficiencies often exist in the production, debugging and inspection process of these monitoring devices:

[0003] 1) each device needs to test 16 remote signals, 10 remote controls, power loss inspection, system information inspection, including device type, software version, EEPROM memory state, watchdog state, clock time calibration state etc., there are many inspection items, signal test adopts manual test harness, and loading efficiency is low, leading to long debugging time (single debugging time is not less than 30 minutes), and production often cannot be completed.

[0004] 2) due to many test items, the mobility of debugging personnel is large, and test item omission is prone to occur.

[0005] 3) in power loss function test, remote signal voltage needs to be dynamically adjusted, and there is deviation in test remote signal voltage adjusted by different debugging personnel, leading to inaccurate debugging result. INVENTION CONTENTS

[0006] The utility model aims at the above-mentioned deficiencies in prior art, and provides a kind of electrification railway contact network switch monitoring device automatic test tool, to solve the problems, such as low efficiency of manual test harness and many test items of existing monitoring device prone to item omission.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0008] A kind of electrification railway contact network switch monitoring device automatic test tool, it includes MCU, system auxiliary circuit, power conversion circuit, YX test power supply switching circuit, the communication interface circuit being connected with the monitoring device to be measured, voice module, remote signal control output circuit and remote control detection input circuit;

[0009] The input end of the power conversion circuit is connected with an AC 220V alternating current power supply, and the output end of the power conversion circuit is connected with a YX test power supply switching circuit and an MCU respectively; the MCU is connected with the YX test power supply switching circuit, a system auxiliary circuit, a communication interface circuit, a voice module, a remote signaling control output circuit and a remote control detection input circuit respectively.

[0010] Further, the MCU is a chip GD32F103VGT6; the remote control detection input circuit comprises 10 optical couplers TLP181 and a signal socket J3; the pins 26, 27, 28, 55, 56, 57, 58, 59, 61 and 62 of the chip GD32F103VGT6 are connected with the pins 1 of the 10 optical couplers TLP181 respectively; the 10 optical couplers are connected with the terminal ends YK1, YK2, YK3, YK4, YK5, YK6, YK7, YK8, YK9 and YK10 of the monitored device through the signal socket J3 respectively.

[0011] Further, the remote signaling control output circuit comprises 8 relays AQW214 and a signal socket J2; the pins 8 and 9, the pins 10 and 11, the pins 24 and 25, the pins 37 and 38, the pins 39 and 40, the pins 51 and 52, the pins 53 and 2, the pins 3 and 4 of the chip GD32F103VGT6 are connected with the pins 2 and 4 of the 8 relays AQW214 respectively; the 8 relays AQW214 are connected with the terminal ends YX1, YX2, YX3, YX4, YX5, YX6, YX7, YX8, YX9, YX10, YX11, YX12, YX13, YX14, YX15 and YX16 of the monitored device through the signal socket J2.

[0012] Further, the power conversion circuit comprises a 24V AC-DC power module, a 3.3V AC-DC power module, a 15V AC-DC power module, a 13V AC-DC power module and a 12V AC-DC power module; the 24V AC-DC power module is connected with the 3.3V AC-DC power module, the 15V AC-DC power module, the 13V AC-DC power module and the 12V AC-DC power module respectively.

[0013] Further, the output ends of the 24V AC-DC power module, the 5V AC-DC power module, the 13V AC-DC power module and the 12V AC-DC power module are connected with the YX test power supply switching circuit respectively; the output end of the 3.3V AC-DC power module is connected with the MCU.

[0014] Further, the YX test power supply switching circuit comprises a demultiplexer SN74LVC138; the pin 14, the pin 13, the pin 12 and the pin 11 of the demultiplexer SN74LVC138 are connected with the output terminals of the 24V AC-DC power module, the 5V AC-DC power module, the 13V AC-DC power module and the 12V AC-DC power module respectively; the pin 1, the pin 2 and the pin 3 of the demultiplexer SN74LVC138 are connected with the pin 34, the pin 35 and the pin 36 of the chip GD32F103VGT6 respectively.

[0015] Further, the communication interface circuit comprises a U6 chip SN74AHC1G04DBV, a U7 chip SN74AHC1G125 and an M1 chip RSM232.

[0016] The pin 4 and the pin 3 of the M1 chip RSM232 are connected with the pin 43 and the pin 42 of the chip GD32F103VGT6 respectively, the pin 6 and the pin 7 of the M1 chip RSM232 are connected with the pin 1 and the pin 2 of the J4 chip KF2510-3 respectively, and the pin 1 and the pin 2 of the J4 chip KF2510-3 are connected with the RXD pin and the TXD pin in the JP2 interface of the monitored device respectively.

[0017] The pin 4 of the U6 chip SN74AHC1G04DBV is connected with the pin 17 of the chip GD32F103VGT6, the 2 pin of the U7 chip SN74AHC1G125 is connected with the pin 16 of the chip GD32F103VGT6, the 4 pin of the U7 chip SN74AHC1G125 is connected with the pin 8 of the optical fiber interface LD1 OCB4141, and the optical fiber interface LD1 OCB4141 is connected with the optical communication interface of the monitored device.

[0018] Further, the voice module is connected with the pin 29 and the pin 30 of the chip GD32F103VGT6.

[0019] The electrified railway catenary switch monitoring device automatic test tool has the following beneficial effects:

[0020] 1. The electrified railway catenary switch monitoring device automatic test tool can automatically test the monitoring device of the electrified railway catenary switch centralized monitoring system in the production process, shorten the debugging time, improve the debugging quality, reduce the ability requirement of the debugging personnel, and finally achieve the purpose of reducing the production cost.

[0021] 2. The electrified railway catenary switch monitoring device automatic test tool uses the test tool to debug the monitoring device, and the single test time is about 1 minute, compared with the time consumption of 30 minutes per unit of the manual harness debugging, the production cycle can be greatly shortened, and the production cost can be reduced.

[0022] 3. The utility model discloses test frock to the test of monitoring device is completed automatically according to program setting project, and there is no missed inspection condition.

[0023] 4. The utility model discloses using frock to debug monitoring device, and debugging personnel only need simple operation, such as connecting power supply and test line, starting test, stopping test, recording test result through voice prompt etc., and the required test auxiliary signal is all produced by test frock, and automatic application can significantly reduce the technical level requirement of debugging personnel, and improve monitoring device debugging quality. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the circuit principle block diagram of the utility model electrical railway catenary switch monitoring device automatic test frock.

[0025] Figure 2 It is remote control detection input circuit one of the utility model.

[0026] Figure 3 It is remote control detection input circuit two of the utility model.

[0027] Figure 4 It is remote communication control output circuit one of the utility model.

[0028] Figure 5 It is remote communication control output circuit two of the utility model.

[0029] Figure 6 It is remote communication control output circuit three of the utility model.

[0030] Figure 7 It is signal socket J2 and J3 circuit diagram of the utility model.

[0031] Figure 8 It is power conversion circuit one of the utility model.

[0032] Figure 9 It is power conversion circuit two of the utility model.

[0033] Figure 10 It is power conversion circuit three of the utility model.

[0034] Figure 11 It is YX test power switching circuit one of the utility model.

[0035] Figure 12 It is YX test power switching circuit two of the utility model.

[0036] Figure 13 It is YX test power switching circuit three of the utility model.

[0037] Figure 14 It is communication interface circuit of the utility model.

[0038] Figure 15 MCU, system auxiliary circuit for the utility model Figure 1 .

[0039] Figure 16 MCU, system auxiliary circuit for the utility model Figure 2 .

[0040] Figure 3 Circuit diagram of the to-be-tested monitoring device. DETAILED DESCRIPTION

[0041] The specific embodiments of the utility model are described below in order to enable those skilled in the art to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific embodiments, and for those skilled in the art, it is obvious that various changes are within the spirit and scope of the utility model defined and determined by the appended claims, and all utility model creations utilizing the concept of the utility model are within the scope of protection.

[0042] Embodiment 1

[0043] The electrical railway catenary switch monitoring device automatic test tool of the embodiment can automatically test the monitoring device, can shorten the debugging time, reduce the production cost, and can avoid the missed inspection condition, and reference Figure 7 and Figure 4 , and specifically includes:

[0044] The test start button and the test stop button, the MCU, the system auxiliary circuit, the power conversion circuit, the YX test power switching circuit, the communication interface circuit connected with the to-be-tested monitoring device, the voice module, the remote signaling control output circuit and the remote control detection input circuit;

[0045] Among them, the input end of the power conversion circuit is connected with AC220V alternating current power supply, and the output end of the power conversion circuit is connected with the YX test power switching circuit and the MCU respectively; the MCU is connected with the YX test power switching circuit, the system auxiliary circuit, the communication interface circuit, the voice module, the remote signaling control output circuit and the remote control detection input circuit respectively.

[0046] As a preferred embodiment of the embodiment, the MCU of the embodiment adopts chip GD32F103VGT6;

[0047] The test start button and the test stop button of the embodiment are connected with the pin 14 and the pin 15 of the chip GD32F103VGT6 respectively as the start and stop switch.

[0048] Remote control detection input circuit

[0049] ReferenceFigure 5 、 Figure 6 and Figure 7 The remote control detection input circuit of the embodiment is used for input of remote control signals during remote control test, and specifically includes 10 optical couplers TLP181 and a signal socket J3; the pins 26, 27, 28, 55, 56, 57, 58, 59, 61 and 62 of the chip GD32F103VGT6 are connected with the pins 1 of the 10 optical couplers TLP181 respectively; the 10 optical couplers are connected with the terminal connection points YK1, YK2, YK3, YK4, YK5, YK6, YK7, YK8, YK9 and YK10 of the monitored device to be tested through the signal socket J3.

[0050] Remote signaling control output circuit

[0051] Reference Figure 8 、 Figure 9 、 Figure 10 and Figure 11 The remote signaling control output circuit is used for output of remote control signals, and specifically includes 8 relays AQW214 and a signal socket J2; the pins 8 and 9, the pins 10 and 11, the pins 24 and 25, the pins 37 and 38, the pins 39 and 40, the pins 51 and 52, the pins 53 and 2, the pins 3 and 4 of the chip GD32F103VGT6 are connected with the pins 2 and 4 of the 8 relays AQW214 respectively; the 8 relays AQW214 are connected with the terminal connection points YX1, YX2, YX3, YX4, YX5, YX6, YX7, YX8, YX9, YX10, YX11, YX12, YX13, YX14, YX15 and YX16 of the monitored device to be tested through the signal socket J2.

[0052] Power conversion circuit

[0053] Reference Figure 12 、 Figure 13 and Figure 14 The power conversion circuit is used for providing converted power, and includes a 24V AC-DC power module, a 3.3V AC-DC power module, a 15V AC-DC power module, a 13V AC-DC power module and a 12V AC-DC power module; the 24V AC-DC power module is connected with the 3.3V AC-DC power module, the 15V AC-DC power module, the 13V AC-DC power module and the 12V AC-DC power module respectively.

[0054] The output ends of the 24V AC-DC power module, the 5V AC-DC power module, the 13V AC-DC power module and the 12V AC-DC power module are respectively connected with the YX test power switching circuit; and the output end of the 3.3V AC-DC power module is connected with the MCU.

[0055] In the specific operation, the AC 220V AC power input is converted into DC 24V DC power through a 24V AC-DC power module, and the DC 24V power is converted into +3.3V, +15V, +13V and +12V DC power through four AC-DC power modules respectively, wherein the +3.3V is used for testing the working voltage in the tooling board, and the other powers are used for remote signaling test functions.

[0056] The YX test power switching circuit;

[0057] Reference Figure 15 、 Figure 16 and ​ The YX test power switching circuit comprises a decoder, a photoelectric coupler and a relay, and selects +24V, +15V, +13V and +12V as the remote signaling test power under the control of the MCU output pin signal;

[0058] The pin 14, the pin 13, the pin 12 and the pin 11 of the multiplexer SN74LVC138 are respectively connected with the output ends of the 24V AC-DC power module, the 5V AC-DC power module, the 13V AC-DC power module and the 12V AC-DC power module; and the pin 1, the pin 2 and the pin 3 of the multiplexer SN74LVC138 are respectively connected with the pin 34, the pin 35 and the pin 36 of the chip GD32F103VGT6.

[0059] The communication interface circuit;

[0060] Reference ​ The communication interface circuit is used for realizing the communication connection between the automatic test tooling and the monitored device to be tested, and specifically comprises a U6 chip SN74AHC1G04DBV, a U7 chip SN74AHC1G125 and an M1 chip RSM232.

[0061] The pin 4 and the pin 3 of the M1 chip RSM232 are respectively connected with the pin 43 and the pin 42 of the chip GD32F103VGT6; the pin 6 and the pin 7 of the M1 chip RSM232 are respectively connected with the pin 1 and the pin 2 of the J4 chip KF2510-3; and the pin 1 and the pin 2 of the J4 chip KF2510-3 are respectively connected with the RXD pin and the TXD pin in the JP2 interface of the monitored device to be tested.

[0062] Pin 4 of U6 chip SN74AHC1G04DBV is connected with pin 17 of chip GD32F103VGT6, pin 2 of U7 chip SN74AHC1G125 is connected with pin 16 of chip GD32F103VGT6, pin 4 of U7 chip SN74AHC1G125 is connected with pin 8 of fiber interface LD1 OCB4141, and the fiber interface LD1 OCB4141 is connected with the optical communication interface of the to-be-tested monitoring device.

[0063] The voice module is connected with pin 29 and pin 30 of chip GD32F103VGT6, and the voice module is preferably YS-V6 voice module as mature technology in the art, and the specific composition of the voice module is not described herein.

[0064] The system auxiliary circuit of the embodiment is used for providing reset and working state monitoring signal for the MCU and JTAG debugging interface, as shown in ​ and ​ which are conventional technologies in the art, and the specific composition of the system auxiliary circuit is not described herein.

[0065] The system information detection of the to-be-tested monitoring device of the embodiment specifically includes the following contents:

[0066] (1) The MCU of the automatic test tool sends "STOP" to stop the watchdog through the TXD0 serial port (pin P42 of the MCU), the on-board watchdog of the to-be-tested monitoring device is timed out, a reset signal is output, the to-be-tested monitoring device is restarted, and when the device is powered on, a power-on message is uploaded to the RXD0 serial port pin (P43 pin of the MCU) of the board MCU of the automatic test tool.

[0067] (2) The automatic test tool identifies the uploaded start message and sends commands through TXD2 and RXD2 (P29 and P30 pins of the MCU) to control the voice module to output voice broadcast: board type, software version number, for the test personnel to check and record.

[0068] (3) The MCU of the automatic test tool sends "INFO" command through the TXD0 serial port, identifies the parameter EEPROM and event EEPROM state in the returned information, and controls the voice module to play the check state through the MCU; identifies the hexadecimal address information, and controls the voice module to play the address information through the MCU.

[0069] (4) The MCU of the automatic test tool sends "INFO" command twice through the TXD0 serial port, the interval between the two commands is 2 seconds, and the time of the two times is compared, and the test result is played through the MCU to control the voice module to judge whether the clock of the to-be-tested monitoring device is working normally.

[0070] The remote signaling test of the to-be-tested monitoring device specifically includes the following contents:

[0071] (1) Test tool MCU outputs control signals through pins P34, P35, P36 to select the remote signaling power supply as 24V, and then outputs control signals through pin P8 to add a 24V test signal to the YX1 terminal of the monitored device. Meanwhile, the MCU connects with the optical communication interface of the monitored device through TXD1, RXD1 serial ports (pins P16, P17 of the MCU), sends a remote signaling full call command, checks whether the applied analog remote signaling is normal, judges whether the YX1 channel of the monitored device is normal, and if the check is abnormal, the MCU plays an abnormal state through the voice module and stops the subsequent test. If there is no abnormality, the MCU repeats the above process until the remote signaling test of YX2-YX16 channels is completed.

[0072] (2) On the basis of the above, the analog remote signaling control signal applied to YX2-YX16 channels is maintained, and at the same time, the MCU controls the YX test power supply switching circuit to change the remote signaling power supply to 12V to detect whether all remote signaling is invalid at this time, so as to judge whether the threshold voltage of each remote signaling channel is normal.

[0073] (3) After all the tests are completed, if there is no abnormality, the MCU plays a normal remote signaling check result through the voice module.

[0074] The remote control test of the monitored device includes the following contents:

[0075] (1) The automatic test tool MCU outputs control signals through pins P8, P37 respectively to drive the 24V remote signaling power supply applied to YX1 (closing position), YX7 (remote operation) remote signaling terminals. The test tool MCU sends a disconnecting command of the remote control disconnecting relay of the disconnecting switch through TXD1, RXD1 serial ports to control the disconnecting relay of the disconnecting switch of the monitored device to act. The MCU detects the action return state of YK1 and YK3 contacts through pins P26, P28. If the remote control action return is incorrect, the MCU plays the test abnormal condition through the voice module and terminates the subsequent test.

[0076] (2) The automatic test tool MCU outputs control signals through pins P8, P37 respectively to apply 24V remote signaling power supply to YX2 (disconnecting position), YX7 (remote operation) remote signaling terminals to control the disconnecting relay of the disconnecting switch of the monitored device to act. The MCU detects the action return state of YK2 and YK4 contacts through pins P27, P55. If the remote control action return is incorrect, the MCU plays the test abnormal condition through the voice module and terminates the subsequent test.

[0077] (3) The automatic test tool MCU sends a remote control closing / opening command of the test object through the TXD1, RXD1 serial port to control the test relay to act, and the MCU sends a remote signaling full call command through the communication message to check the YX17 (test switch) signal change. If the action is abnormal, the MCU plays the test abnormal situation through the voice module and terminates the subsequent test.

[0078] (4) The automatic test tool MCU outputs a control signal through the pin P10 to apply a 24V remote signaling power to the YX3 (operating power split position) remote signaling terminal to give +24V. The test tool MCU sends an electric operating switch closing command through the TXD1, RXD1 serial port to control the closing relay of the electric operating switch of the monitored device to act. The MCU detects the YK5 contact action return state through the pin P56. If the remote control action return is incorrect, the MCU plays the test abnormal situation through the voice module and terminates the subsequent test.

[0079] (5) The automatic test tool MCU outputs a control signal through the pin P11 to apply a 24V remote signaling power to the YX4 (operating power closing position) remote signaling terminal to give +24V. The test tool MCU sends an electric operating switch opening command through the TXD1, RXD1 serial port to control the opening relay of the electric operating switch of the monitored device to act. The MCU detects the YK6 contact action return state through the pin P57. If the remote control action return is incorrect, the MCU plays the test abnormal situation through the voice module and terminates the subsequent test.

[0080] (6) The automatic test tool MCU sends a heater opening command through the TXD1, RXD1 serial port to control the opening relay of the heater of the monitored device to act. The MCU detects the YK7 contact action return state through the pin P58. If the remote control action return is incorrect, the MCU plays the test abnormal situation through the voice module and terminates the subsequent test.

[0081] (7) The automatic test tool MCU sends a heater opening command through the TXD1, RXD1 serial port to control the opening relay of the heater of the monitored device to act. The MCU detects the YK8 contact action return state through the pin P59. If the remote control action return is incorrect, the MCU plays the test abnormal situation through the voice module and terminates the subsequent test.

[0082] (8) The automatic test tool MCU sends a YK9 action command through the TXD1, RXD1 serial port to control the YK9 relay of the monitored device to act. The MCU detects the YK9 contact action return state through the pin P61. If the remote control action return is incorrect, the MCU plays the test abnormal situation through the voice module and terminates the subsequent test.

[0083] (9) The MCU of the automatic test tool sends YK10 action command through the TXD1, RXD1 serial port, controls the relay action of the monitored device YK10, the MCU detects the action return state of the YK10 contact through the P62 pin, if the remote control action return is incorrect, the MCU plays the test abnormal situation through the voice module, and terminates the subsequent test.

[0084] The power-off test of the monitored device includes the following contents:

[0085] 1) Under the condition of no power-off of alternating current (MCU pin P33=0), the test tool MCU outputs control signals through the pins P34, P35, P36, selects the 24V remote signaling power supply, and simultaneously outputs control signals through P8, P9, P10, P11, P24, P25, P37, P38, P39, P40, P51, P52, P53, P2, P3, P4, drives the 24V remote signaling power supply to all remote signaling terminals of the monitored device, the MCU sends the remote signaling full call command through the TXD1, RXD1 serial port, collects all remote signaling, and confirms that all remote signaling (YX1-YX16) is in the on state;

[0086] 2) The test tool MCU outputs control signals through the pin P31, first cuts off the AC220V output for supplying power to the device, the MCU sends the remote signaling full call command through the TXD1, RXD1 serial port, and detects whether YX18 (alternating current has power) is disconnected;

[0087] 3) Keep the current power-off state, the test tool MCU outputs control signals through the pins P34, P35, P36, selects the 15V remote signaling power supply, the MCU sends the remote signaling full call command through the TXD1, RXD1 serial port, detects that YX19 (battery has power) is disconnected, and YX1-YX16 remote signaling is in the on state;

[0088] 4) Keep the current power-off state, the test tool MCU outputs control signals through the pins P34, P35, P36, selects the DC12V remote signaling power supply, the MCU sends the remote signaling full call command through the TXD1, RXD1 serial port, collects remote signaling, and confirms that all remote signaling (YX1-YX16) is in the on state (the device is power-off, and the remote signaling stops updating);

[0089] 5) Restore the alternating current power supply, end the power-off test, if all processes meet the above description, the MCU plays the power-off function test normal through the voice module.

[0090] Although the specific embodiments of the utility model are described in detail in combination with the drawings, it should not be understood as limiting the protection scope of the patent. Various modifications and changes made by those skilled in the art within the scope described in the claims still belong to the protection scope of the patent.

Claims

1. An automatic test tool for an OCS monitoring device for an electrified railway catenary, characterized in that: The MCU, system auxiliary circuit, power conversion circuit, YX test power switching circuit, communication interface circuit connected with the monitored device, voice module, remote signaling control output circuit and remote control detection input circuit are included. The input end of the power conversion circuit is connected with AC 220V alternating current power, and the output end of the power conversion circuit is connected with the YX test power switching circuit and the MCU respectively; the MCU is connected with the YX test power switching circuit, system auxiliary circuit, communication interface circuit, voice module, remote signaling control output circuit and remote control detection input circuit respectively.

2. The automatic test tool for monitoring devices of electrified railway catenary switches according to claim 1, characterized in that: The MCU is chip GD32F103VGT6; the remote control detection input circuit includes 10 optical couplers TLP181 and signal socket J3; the pins 26, 27, 28, 55, 56, 57, 58, 59, 61 and 62 of the chip GD32F103VGT6 are connected with the pins 1 of the 10 optical couplers TLP181 respectively; the 10 optical couplers are connected with the terminal YK1, YK2, YK3, YK4, YK5, YK6, YK7, YK8, YK9 and YK10 of the monitored device through the signal socket J3 respectively.

3. The automatic test tool for monitoring devices of electrified railway catenary switches according to claim 2, characterized in that: The remote signaling control output circuit includes 8 relays AQW214 and signal socket J2; the pins 8 and 9, pins 10 and 11, pins 24 and 25, pins 37 and 38, pins 39 and 40, pins 51 and 52, pins 53 and 2, pins 3 and 4 of the chip GD32F103VGT6 are connected with the pins 2 and 4 of the 8 relays AQW214 respectively; the 8 relays AQW214 are connected with the terminal YX1, YX2, YX3, YX4, YX5, YX6, YX7, YX8, YX9, YX10, YX11, YX12, YX13, YX14, YX15 and YX16 of the monitored device through the signal socket J2.

4. The automatic test tool for the monitoring device of the electrified railway catenary switch according to claim 2, characterized in that: The power conversion circuit includes 24V AC-DC power module, 3.3V AC-DC power module, 15V AC-DC power module, 13V AC-DC power module and 12V AC-DC power module; the 24V AC-DC power module is connected with the 3.3V AC-DC power module, 15V AC-DC power module, 13V AC-DC power module and 12V AC-DC power module respectively.

5. The automatic test fixture for monitoring devices of electrified railway catenary switches according to claim 4, characterized in that: The output ends of the 24V AC-DC power module, 5V AC-DC power module, 13V AC-DC power module and 12V AC-DC power module are connected with the YX test power switching circuit respectively; the output end of the 3.3V AC-DC power module is connected with the MCU.

6. The automatic test fixture for monitoring devices of electrified railway catenary switches according to claim 5, characterized in that: The YX test power supply switching circuit includes a demultiplexer SN74LVC138; the pin 14, the pin 13, the pin 12 and the pin 11 of the demultiplexer SN74LVC138 are connected with the output terminals of 24VAC-DC power module, 5V AC-DC power module, 13V AC-DC power module and 12V AC-DC power module respectively; the pin 1, the pin 2 and the pin 3 of the demultiplexer SN74LVC138 are connected with the pin 34, the pin 35 and the pin 36 of the chip GD32F103VGT6 respectively.

7. The automatic test fixture for monitoring devices of electrified railway catenary switches according to claim 2, characterized in that: The communication interface circuit includes a U6 chip SN74AHC1G04DBV, a U7 chip SN74AHC1G125 and a M1 chip RSM232; The pin 4 and the pin 3 of the M1 chip RSM232 are connected with the pin 43 and the pin 42 of the chip GD32F103VGT6 respectively, the pin 6 and the pin 7 of the M1 chip RSM232 are connected with the pin 1 and the pin 2 of the J4 chip KF2510-3 respectively, the pin 1 and the pin 2 of the J4 chip KF2510-3 are connected with the RXD pin and the TXD pin in the JP2 interface of the to-be-tested monitoring device respectively; The pin 4 of the U6 chip SN74AHC1G04DBV is connected with the pin 17 of the chip GD32F103VGT6, the 2 pin of the U7 chip SN74AHC1G125 is connected with the pin 16 of the chip GD32F103VGT6, the 4 pin of the U7 chip SN74AHC1G125 is connected with the pin 8 of the optical fiber interface LD1 OCB4141, and the optical fiber interface LD1 OCB4141 is connected with the optical communication interface of the to-be-tested monitoring device.

8. The automatic test tool for monitoring device of electrified railway catenary switch according to claim 2, characterized in that: The voice module is connected with the pin 29 and the pin 30 of the chip GD32F103VGT6.

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