CR200J motor train unit fan heater control panel test device and detection method

Abstract

The invention discloses a CR200J motor train unit fan heater control panel test device and detection method, the device comprises a low-voltage power supply module, a high-voltage power supply module and a test control circuit which are connected in parallel with an AC 220V power supply, and the input end of the control panel test circuit is connected in parallel with the output end of the low-voltage power supply module and the output end of the high-voltage power supply module. The control end of the test control circuit is connected to a circuit between the low-voltage and high-voltage power supply modules and the control panel test circuit; the lower computer is connected with the test control circuit and the control board test circuit. The output end of the control board test circuit is connected with the fan heater control board to be tested. According to the invention, the heating element and the fan are used as loads, the temperature sensor and the temperature control switch are used for monitoring the working state of the fan heater control panel, and comprehensive tests are carried out on 600V input and output open circuit or short circuit of the control panel, temperature control failure and non-working and over-temperature protection functions by sampling voltage and temperature parameters during working. Fault judgment is carried out on the fan heater control panels of various models through parameter display of the upper computer and display conditions of the indicator lamps.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board inspection and testing, in particular to a test device for a heater control board of a CR200J electric train set. Background Art

[0002] The electric heater on a train is an electric heating device used in washrooms, toilets, and platforms on CR200J centralized power trains with a speed of 160 km / h. The heater control panel on the CR200J train is the core control component of the forced-ventilation electric heater. The panel features protections for input open circuit, output open circuit or short circuit, fan stall or temperature control failure, and overtemperature. If any of these faults occur, the heater automatically shuts off, preventing fire and electrical leakage, and ensuring user safety.

[0003] The core of the EMU heater's control is the heater control board. Currently, the manufacturers of electric heaters for the CR200J centralized power EMU are Jiangdao and Zhenjiang Huayang. Zhenjiang Huayang produces six versions of heater control boards, while Jiangdao produces two. Three of the Zhenjiang Huayang heater control boards feature a 600V DC voltage detection function. If the 600V voltage is not detected, the control board will not output commands properly, and other control circuits will not function.

[0004] The heater control board contains a DC600V voltage detection circuit. First, the voltage is dropped through several series resistors and sent to the LM393 comparator. The comparator output controls the optocoupler, and the other end of the optocoupler controls the potential of the heater control board pin, thereby meeting the working conditions of the heater control board. If a switch analog signal is directly given to the heater control board, the intermediate circuit link of the DC600V sampling circuit cannot judge whether it is good or bad. Secondly, it is extremely troublesome to directly add a control signal to the corresponding pin of the heater control board, and additional welding wires need to be added.

[0005] The heater control board monitors the voltage and current of its fan's operating circuit, controlled by an LM393 comparator and an optocoupler. If the fan circuit malfunctions, the board outputs a command to disconnect the DC600V operating circuit and stop heating. The heating element in the forced-ventilation electric heater on the CR200J centralized power train operates at a DC600V voltage. This is achieved by controlling the on / off switching of a field-effect transistor (FET). A resistor is connected in series with the element's operating circuit for current sampling.

[0006] The control panel is the primary failure point for heaters on forced-ventilation EMUs. Since the CR200J centralized power EMU entered depot maintenance, failures of the EMU heater control panel have been increasing. Through in-depth research on the EMU heater control panel, and through fault detection, troubleshooting, and repair, we discovered that we lacked a maintenance test device for this panel.

[0007] After a fault occurs in the existing forced ventilation EMU heater control panel, the fault repair status cannot be verified after repair. It needs to be reinstalled and powered on to test whether the fault is repaired. Repeated installation causes a waste of maintenance manpower and time, and occupies the maintenance time of section repair passenger car parts and the maintenance resources and time of the EMU under inspection, which is costly and inefficient. This device solves the problem that the forced ventilation EMU heater control panel cannot determine the fault repair status due to the lack of a test device.

[0008] Disadvantages of existing technology: There is no corresponding test equipment for testing and maintenance, and when the forced ventilation EMU heater fails, it cannot be handled in time, which will result in high maintenance costs and the normal maintenance process cannot be delivered on time, leading to production stagnation. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a CR200J EMU heater control panel test device and a detection method capable of testing the EMU heater control panel.

[0010] The present invention is achieved through the following technical solutions:

[0011] CR200J EMU heater control panel test device, including:

[0012] Low-voltage power supply module 1, the input end of which is connected to an AC220V power supply and is used to provide low-voltage power to components in the circuit;

[0013] High-voltage power supply module 2, the input end of which is connected in parallel to an AC220V power supply, and is used to provide high-voltage power to the heater control board 8;

[0014] The test control circuit 3 has an input end connected in parallel to an AC220V power supply, and a control end connected to the circuit between the control board test circuit 5 and the low-voltage power module 1 and the high-voltage power module 2, and is used to control the power on and off of the heater control board 8;

[0015] The lower computer 4 is connected to the test control circuit 3 and the control board test circuit 5 and is used to control the circuit and collect data;

[0016] The control board test circuit 5 has an input end connected in parallel to the output ends of the low-voltage power supply module 1 and the high-voltage power supply module 2, and an output end connected to the heater control board 8, for testing the heater control board 8;

[0017] The control board test circuit 5 includes:

[0018] Test interface assembly 51, the interface end of which is connected to the heater control board 8;

[0019] The working display circuit 52 is connected to the test interface assembly 51 and is used to display the working status of the heater control panel 8;

[0020] The load circuit 53 is connected to the first test interface assembly 51 , and the control end is connected to the lower computer 4 , and is used to provide a load for the heater control board 8 .

[0021] Furthermore, a control board test circuit 5 and a second control board test circuit 6 are connected in parallel to the ends of the low-voltage power supply module 1 and the high-voltage power supply module 2. The control board test circuit 5 is used to test the Huayang series control board 81, and the second control board test circuit 6 is used to test the Jiangdao series control board 82. The second control board test circuit 6 includes:

[0022] The second interface component 61 is connected to the Jiangdao series control board 82;

[0023] The second display circuit 62 is connected to the second interface component 61 and is used to display the working status of the Jiangdao series control board 82;

[0024] The second load circuit 63 is connected to the second interface component 61 and is used to provide a load for the Jiangdao series control board 82 .

[0025] Furthermore, the low-voltage power supply module 1 includes a DC5V power supply module 11, a DC12V power supply module 12, a DC24V power supply module 13 and a DC110V power supply module 14 connected in parallel;

[0026] The output ends of the four power modules are all connected in parallel with a voltmeter and a socket, and the positive poles of the input ends and output ends of the four power modules are all provided with a control button and a fuse.

[0027] Furthermore, the high-voltage power supply module 2 includes an AC step-up transformer 21, a rectifier bridge 22, and a filter circuit 23 connected in series. The input end of the AC step-up transformer 21 is connected to an AC220V power supply; the output end of the filter circuit 23 is provided with an AC contactor J1, and the output end of the AC contactor J1 is connected in parallel with an ammeter and a socket X5;

[0028] The positive electrode of the output end of the filter circuit 23 and the positive electrode of the input and output ends of the AC step-up transformer 21 are all provided with fuses;

[0029] A delay circuit 24 is connected in parallel to the positive pole between the rectifier bridge 22 and the filter circuit 23 , and an AC220V power supply is connected in parallel to the power supply end of the delay circuit 24 .

[0030] Furthermore, the test control circuit 3 includes a manual control circuit 31 and an automatic control circuit 32 whose input terminals are connected in parallel to an AC220V power supply; the input terminals of the manual control circuit 31 and the automatic control circuit 32 are switched via a conversion switch SA1;

[0031] The interlock output terminal of the manual gear position of the transfer switch SA1 of the manual control circuit 31 is connected to the AC contactor J3. The AC contactor J3 has two interlocking groups. The input terminals of the two interlocking groups are respectively connected to the DC110V power module 14 and the positive output terminal of the high-voltage power module 2. The output terminals of the two interlocking groups are connected in parallel to the control board test circuit 5 and the second control board test circuit 6.

[0032] The interlock output terminal of the automatic gear of the transfer switch SA1 of the automatic control circuit 32 is connected to the AC contactor J2. The AC contactor J2 has two groups of interlocks. The input terminals of the two groups of interlocks are connected to the positive pole of the AC220V power supply. The output terminal of one group of interlocks is connected to the positive pole of the power supply terminal of the lower computer 4. The output terminal of the other group of interlocks is connected in parallel to the interlock input terminals of the intermediate relays K1 and K2. The interlock output terminal of the intermediate relay K1 is connected to the positive pole of the coil of the AC contactor KM1. The interlock input terminal of the AC contactor KM1 is connected to the output terminal of the DC110V power module 14. The interlock output terminals are connected in parallel. Control board test circuit 5 and second control board test circuit 6; the interlocking output end of the intermediate relay K2 is connected to the positive pole of the AC contactor KM3 coil, the interlocking input end of the AC contactor KM3 is connected to the output end of the high-voltage power module 2, and the interlocking output end is connected in parallel to the control board test circuit 5 and the second control board test circuit 6; the positive poles of the coils of the intermediate relays K1 and K2 are connected to the lower computer 4, and the negative poles of the coils are connected to the negative pole of the output end of the DC24V power module 13; the negative pole of the power supply end of the lower computer 4 and the negative poles of the coils of the AC contactors J2, KM1, and KM3 are connected in parallel to the negative pole of the AC220V power supply.

[0033] Furthermore, the test interface assembly 51 includes a Huayang 25-core socket JP1 and a Huayang 4-core socket 511; wherein, pins 1, 14, 3, and 16 of the Huayang 25-core socket JP1 are connected to the socket interface J3 on the Huayang series control board 81, pins 11 and 24 of the socket are connected to the socket interface J1 on the Huayang series control board 81, pins 4-9 of the socket are connected to the 6P socket J2-6 on the Huayang series control board 81, and pins 18-22 of the socket are connected to the 5P socket J2-5 on the Huayang series control board 81; the socket end of the Huayang 4-core socket 511 is connected to the J4 socket on the Huayang series control board 81;

[0034] The working display circuit 52 is provided with a 5P socket indicator light circuit 521 and a 6P socket indicator light circuit 522. The 6P socket indicator light circuit 522 is connected to the 4-9 pins of the Huayang 25-core socket JP1 input end, and the 5P socket indicator light circuit 521 is connected to the 18-22 pins of the Huayang 25-core socket JP1 input end. Both the 5P socket indicator light circuit 521 and the 6P socket indicator light circuit 522 are provided with a power light, a fan light, a heating light and a fault light.

[0035] The load circuit 53 includes a heating element RT1, a fan M1 and a thermistor RT2. The positive and negative poles of the heating element RT1 are connected to pins 2 and 4 of the Huayang 4-core socket 511. The heating element RT1 is composed of three thermistors in parallel, and a branch of one of the thermistors is provided with a relay K4 for control connection. The positive pole of the coil of the relay K4 is connected to the lower computer 4, and the negative pole is connected to the negative pole of the output end of the DC24V power module 13; the two ends of the fan M1 are connected to pins 3 and 16 of the input end of the Huayang 25-core socket JP1; the positive pole of the thermistor RT2 is connected to pin 1 of the input end of the Huayang 25-core socket JP1 through a relay K3, and the negative pole of the thermistor RT2 is connected to pin 14 of the input end of the Huayang 25-core socket JP1 through a temperature control switch KT1; the positive pole of the coil of the relay K3 is connected to the lower computer 4, and the negative pole is connected to the negative pole of the output end of the DC24V power module 13.

[0036] Furthermore, the lower computer 4 is a PLC control module;

[0037] Pins 3 and 4 of the lower computer 4 are connected to the output end of the high-voltage power module 2 through a voltage transmitter, and pins 5 and 6 of the lower computer 4 are connected to the output end of the DC110V power module 14 through a voltage transmitter;

[0038] Pins 7 and 8 of the lower computer 4 are connected to the temperature sensor ST through the temperature transmitter. The temperature sensor ST is set at the air outlet of the heating element RT1. The power supply end of the temperature transmitter BT is connected to the output end of the DC12V power module 12; the power supply end of the voltage transmitter and the temperature transmitter is connected to the output end of the DC12V power module 12.

[0039] Furthermore, the second interface component 61 includes a Jiangdao 25-core socket JP2 and a Jiangdao 4-core socket 611; the socket end of the Jiangdao 25-core socket JP2 is plugged into the J21 and J20 socket ends on the Jiangdao series control board 82; the socket end of the Jiangdao 4-core socket 611 is plugged into the J20 socket end on the Jiangdao series control board 82, and the 1 and 3 pins of the input end of the Jiangdao 4-core socket 611 are connected to the output end of the high-voltage power module 2; the 25 and 13 pins of the input end of the Jiangdao 25-core socket JP2 are connected to the output end of the DC110V power module 14;

[0040] The second display circuit 62 is connected to the input end of the Jiangdao 25-core socket JP2. The second display circuit 62 is provided with a power light, a fan light, a heating light and a fault light.

[0041] The second load circuit 63 includes a heating element RT3, a fan M2 and a thermistor RT4. The positive and negative poles of the heating element RT3 are connected to pins 2 and 4 of the Jiangdao 4-core socket 611, and the power of the heating element RT3 is 800W; the two ends of the fan M2 are connected to pins 1 and 14 of the input end of the Jiangdao 25-core socket JP2, the positive pole of the thermistor RT4 is connected to pin 11 of the input end of the Jiangdao 25-core socket JP2, and the negative pole of the thermistor RT4 is connected to pin 24 of the input end of the Jiangdao 25-core socket JP2 through the temperature control switch KT2.

[0042] Furthermore, an air switch KD1 is provided on the main line in parallel with the low-voltage power supply module 1, the high-voltage power supply module 2, the test control circuit 3 and the AC220V power supply. The output end of the air switch KD1 is connected in parallel with a voltage and current meter and a socket, and the positive pole of the output end of the air switch KD1 is provided with a fuse FU1; the input end of the air switch KD1 is connected in parallel with a multi-purpose socket, and the multi-purpose socket is connected to a host computer 7, and the host computer 7 is a computer, and the host computer 7 is electrically connected to the lower computer 4.

[0043] A method for testing a heater control panel for a CR200J EMU train is based on the CR200J EMU heater control panel test device according to any one of claims 1 to 9, comprising the following steps:

[0044] S1: Preparation before the test: Close the air switch KD1, the power indicator light is on, and the AC voltmeter has a voltage display. Observe whether the input voltage is normal; press the start button of the DC12V power module 12, DC24V power module 13, DC110V power module 14 and high-voltage power module 2 respectively, and observe whether the voltage displayed by the corresponding DC voltmeter is normal. If it is abnormal, check and deal with it. After the voltage is normal, disconnect the start button of the DC110V power module 14 and the high-voltage power module 2; According to the manufacturer and model of the heater control board 8 to be tested, select the connection plug corresponding to the test bench and connect it;

[0045] S2: Manual test: used for troubleshooting and preliminary performance inspection of the EMU heater control panel 8. Turn the test bench function conversion switch SA1 to the manual position. When you hear the closing sound of the contactor J3, it means that the manual control is normal.

[0046] S3: Automatic test: This is used to test the comprehensive performance of the heater control panel 8 after repair, and to visually display and record the main parameters of the heater control panel 8 on the upper computer 7; make preparations before the test, and press the DC12V, DC24V, DC110V, and DC600V start buttons after confirming that the connections are correct; turn the function conversion switch SA1 on the test bench to the automatic position, and hear the J2 contactor pull in, indicating that the automatic conversion is normal;

[0047] S4: Data storage and query: The host computer 7 stores the main test parameters of the EMU heater control panel 8 and performs electronic and refined management of the test data of the EMU heater control panel 8;

[0048] The step S2 further comprises the following test steps:

[0049] S2.1: When testing Huayang series control panel 81:

[0050] Press the start button of the DC110V power module 14 and observe the lighting of the indicator light of the output experimental bench panel working display circuit 52; if the indicator light is not on, it is determined that the power supply system of the Huayang series control board 81 is faulty; the fan light is off, and it is determined that the DC24V power supply or output of the Huayang series control board 81 is faulty; the power light is on, the fan light is on, and the fault light is flashing, indicating that the control of the Huayang series control board 81 is normal; then press the start button QD5 of the high-voltage power supply module 2 and observe the changes in the indicator lights; the power light is on, the fan light is on, the fault light is off, and the heating light is on, indicating that the control of the Huayang series control board 81 is normal; the power light is on, the fan light is on, and the fault light is still flashing, indicating that there is no DC600V input controlled by the Huayang series control board 81 or the DC600V input sampling circuit is faulty;

[0051] S2.2: When testing the A board in the Jiangdao series control board 82:

[0052] Press the start button QD4 of the DC110V power module 14, and observe the lighting of the indicator light of the second load circuit 63 on the experimental bench panel: if the indicator light is not on, it is determined that the power supply system of the tested Jiangdao series control board 82 is faulty; if the fan light is off, it is determined that the DC24V power supply or output of the Jiangdao series control board 82 is faulty; if the power light is on, the fan light is on, and the fault light is flashing, it is determined that the control of the Jiangdao series control board 82 is normal; then press the start button QD5 of the high-voltage power supply module 2, and observe the changes in the indicator light: if the power light is on, the fan light is on, the fault light is off, and the heating light is lit after a delay of 3-5 seconds, it is determined that the control of the Jiangdao series control board 82 is normal.

[0053] S2.3: When testing the B board in the Jiangdao series control board 82:

[0054] Press the start button QD4 of the DC110V power module 14, and observe the lighting of the indicator light of the second load circuit 63 on the experimental bench panel: if the indicator light is not on, it is determined that the power supply system of the tested Jiangdao series control board 82 is faulty; if the fan light is off, it is determined that the DC24V power supply or output of the Jiangdao series control board 82 is faulty, and the fault light will light up at this time; if the power light is on and the fan light is on, it is determined that the control of the Jiangdao series control board 82 is normal; then press the start button QD5 of the high-voltage power supply module 2, and observe the changes in the indicator light: if the power light is on and the fan light is on, and the heating light is on after a delay of 3-5 seconds, it is determined that the control of the Jiangdao series control board 82 is normal.

[0055] Working principle of the present invention:

[0056] This device test bench provides power supply with various independent voltages, including DC5V, DC12V, DC24V, DC110V, and DC600V, through low-voltage power supply module 1 and high-voltage power supply module 2. Based on the connectors required by different models of EMU heater control panels 8 from different manufacturers, corresponding signal and power plugs are provided. Multiple interface output modes are adopted to match various models of forced-ventilation EMU heater CPU control panels. Functional testing of forced-ventilation EMU heater CPU control panels is achieved through the use of different colored signal lights for fan, heating, fault, and power on the external working display circuit 52 or the second display circuit 62.

[0057] At the same time, a manual control circuit 31 and an automatic control circuit 32 are provided. During the automatic control test, the corresponding intermediate relays are closed, and the control voltage and the working voltage are input in parallel. The host computer 7 sends instructions to the lower computer 4 to control the closing and disconnection of the "automatic simulated high temperature input" intermediate relay, thereby simulating the test to see whether the temperature protection function of the heater main control board is in good condition. After the test is completed, the host computer automatically activates the stop test intermediate relay, thereby disconnecting the working power supply and the control power supply. The test program can monitor the working status of the forced ventilation EMU heater CPU control board in real time, including the real-time DC110V control voltage, DC600V working voltage, DC24V fan voltage, and the working temperature in the heat dissipation duct. After entering the automatic test process function block, the data sampling function block is activated by the constant pass mark to sample the data in real time.

[0058] The present invention has the following beneficial effects compared with the prior art:

[0059] The present invention provides DC600V, DC110V, DC24V, DC12V, and DC5V power supplies, uses heating elements RT1 and RT3 and fans M1 and M2 as loads, and uses temperature sensors and temperature control switches as monitoring elements to monitor the operating status of a motor vehicle heater control panel 8. The present invention obtains voltage and temperature parameters during operation by sampling for real-time monitoring. The present invention comprehensively tests the protection functions of the motor vehicle heater control panel 8, such as 600V input open circuit, output open circuit or short circuit, temperature control failure, and overtemperature. The present invention determines faults in the motor vehicle heater control panel 8 by displaying host parameters on the test bench and indicating lamps on the operating display circuit 52 or the second display circuit 62. The present invention improves maintenance efficiency, achieves safe maintenance, safety testing, and comprehensive performance testing, and simultaneously provides intuitive observation and test records of the operating status of the repaired forced ventilation motor vehicle heater control panel 8.

[0060] For 8 types of electric heater CPU boards produced by different manufacturers such as Jiangdao and Huayang, the test can be completed on the test bench by matching the corresponding aviation plugs and terminal sockets, thus realizing the test of 8 forced ventilation EMU heater control boards of various manufacturers and models.

[0061] The heater control panel 8 can be freed from the limitations of the existing electric heater, and a comprehensive functional test of the heater control panel 8 can be completed in the maintenance area. Each power supply has a voltage and current meter that displays the voltage and current values ​​of each line in real time, allowing testers to intuitively judge the functional status of the test electric heater CPU board.

[0062] Using the PLC control modules of host computer 7 and slave computer 4, we tested visualized and coordinated voltage and temperature monitoring, and implemented data storage. Circuit diagram software was used within host computer 7 to create circuit diagrams for eight known electric heater CPU boards. This allows future maintenance work to update the internal diagram library of the PC host computer as the CPU board version changes, facilitating access during repairs and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 is the overall circuit diagram of the present invention;

[0064] Figure 2 This is a circuit diagram of the DC5V power supply module of the present invention;

[0065] Figure 3 This is a circuit diagram of the DC12V power module of the present invention;

[0066] Figure 4 This is a circuit diagram of a DC24V power supply module of the present invention;

[0067] Figure 5 This is a circuit diagram of the DC110V power supply module of the present invention;

[0068] Figure 6 A circuit diagram of a high-voltage power supply module of the present invention;

[0069] Figure 7 A circuit diagram of a manual control circuit of the present invention;

[0070] Figure 8 A circuit diagram of the automatic control circuit of the present invention;

[0071] Figure 9 A circuit diagram of the test control circuit, lower computer and control board test circuit of the present invention;

[0072] Figure 10 This is a circuit diagram of the connection between the Huayang series control board and the Huayang 4-core socket of the present invention;

[0073] Figure 11 This is a circuit diagram of the connection between the Huayang series control board and the Huayang 25-core socket JP1 of the present invention;

[0074] Figure 12 This is the circuit diagram of the six control panels and working display circuits of the Huayang series of the present invention;

[0075] Figure 13 This is a circuit diagram showing the connection between the second control board test circuit of the present invention and the Jiangdao series control board;

[0076] Figure 14 This is a circuit diagram of the connection between the Jiangdao series control board A and the Jiangdao 4-core socket of the present invention;

[0077] Figure 15 This is a circuit diagram of the connection between the Jiangdao series control board B and the Jiangdao 4-core socket of the present invention;

[0078] Figure 16 This is a circuit diagram of the connection between the Jiangdao series control board and the Jiangdao 25-core socket JP2 of the present invention.

[0079] Numbers in the figure:

[0080] 1- low-voltage power module, 11- DC5V power module, 12- DC12V power module, 13- DC24V power module, 14- DC110V power module; 2- high-voltage power module, 21- AC step-up transformer, 22- rectifier bridge, 23- filter circuit, 24- delay circuit;

[0081] 3-test control circuit, 31-manual control circuit, 32-automatic control circuit; 4-lower computer;

[0082] 5-control board test circuit, 51-first test interface assembly, 511-Huayang 4-pin socket, 52-working display circuit, 521-5P socket indicator circuit, 522-6P socket indicator circuit, 53-load circuit;

[0083] 6-second control board test circuit, 61-second interface component, 611-Jiangdao 4-core socket, 62-second display circuit, 63-second load circuit;

[0084] 7-host computer; 8-heater control board, 81-Huayang series control board, 82-Jiangdao series control board. DETAILED DESCRIPTION

[0085] In order to enable those skilled in the art to better understand the technical solution of the present invention, its specific implementation methods are described in detail below with reference to the accompanying drawings.

[0086] Example 1:

[0087] like Figure 1-12 As shown, the test device includes a low-voltage power supply module 1, a high-voltage power supply module 2 and a test control circuit 3 whose input end is connected in parallel to the AC220V power supply. The low-voltage power supply module 1 provides low-voltage power for the components in the circuit, and the high-voltage power supply module 2 provides high-voltage power for the heater control board 8. The input end of the control board test circuit 5 is connected in parallel with the output ends of the low-voltage power supply module 1 and the high-voltage power supply module 2. The control end of the test control circuit 3 is connected to the connecting circuit between the low-voltage power supply module 1, the high-voltage power supply module 2 and the control board test circuit 5, and is used to control the power on and off of the heater control board 8; the lower computer 4 for controlling the circuit and collecting data is connected to the test control circuit 3 and the control board test circuit 5; the output end of the control board test circuit 5 is connected to the heater control board 8 to be tested.

[0088] like Figure 1 As shown, the AC220V power supply is introduced from the external distribution box socket by three 2.5mm machine wires and sent to the top of the device power air switch KD1. Another group is connected to the dedicated multi-hole socket of the host computer 7, which is used as the power supply for the PC host and display screen of the host computer 7. The air switch KD1 of the test device does not control the computer power supply to prevent the PC host power supply from being affected by the device. The host computer 7 can be turned on and used independently. Professional circuit drawing software is provided, and 8 existing CPU control board circuit diagrams are drawn to facilitate maintenance personnel to consult drawings and materials. After the test device is powered on, the red power indicator on the device indicator light is on, and the AC voltage / current meter displays the AC220V voltage and current values ​​in real time.

[0089] like Figure 2As shown, in the circuit of DC5V power module 11, AC220V power is supplied to DC5V power module 11 through the interlocking connection of start button QD1 and fuse FU1. The +DC5V output of the module is supplied to pin 1 of output socket X1 through fuse FU2 and the second interlocking connection of start button QD1. The -DC5V power line is directly connected from the negative output terminal of DC5V power module 11 to pin 3 of output socket X1. The DC5V output of socket X1 provides testing and test power for the external indicator light board of the heater control board 8, which is usually sent for repair.

[0090] like Figure 3 As shown in the figure, in the circuit of DC12V power module 12, AC220V power is supplied to DC12V power module 12 through the start button QD2 interlock and fuse FU3. The +DC12V output of DC12V power module 12 is sent through fuse FU4 to the +DC12V common terminal and the second interlock of start button QD2. The second interlock of start button QD2 then supplies power to pin 1 of output socket X2. The -DC12V power line is connected from the negative output terminal of DC12V power module 12 to the -DC12V common terminal, and then to pin 3 of 4-core output socket X2. The DC12V power supply also supplies the temperature sampling transmitter and DC110V / DC600V voltage sampling transmitter as their operating power.

[0091] like Figure 4 As shown, in the circuit of the DC24V power module 13, the AC220V power supply is supplied to the DC24V power module 13 via the start button QD3 interlock and fuse FU5. The +DC24V output of the DC24V power module 13 is sent through fuse FU6 to terminal 1 of the DC24V DC voltage / current display and the device's +DC24V main line. Simultaneously, through the second interlock of the start button QD3, it is sent to pin 1 of the DC24V output 4-pin socket X3. The -DC24V power line is connected to terminal 0 of the DC voltage / current display for real-time voltage display. Pin 3 of the DC24V output socket X3, the -DC24V return line of the device load, and the -DC24V main line return line are connected to terminal 2 of the DC voltage / current meter to display the operating current of the DC24V load. The DC24V output from the DC24V socket provides the power required for DC24V fan testing and inspection.

[0092] like Figure 5As shown, in the circuit of the DC110V power module 14, the AC220V power supply is interlocked to the DCDC110V power module 14 through the fuse FU7 and the start button QD4. The +DC110V output of the module power supply is sent to the 1 terminal of the DC110V DC voltage / current display meter through the fuse FU8, and is also sent to the +DC110V main line of the device. The +DC110V is then interlocked and output to the 1 pin of the 4-core output socket X4 through the start button QD4; the -DC110V power line is sent to the 0 terminal of the DC voltage / current display meter to realize the real-time display of the voltage value; the 3-pin -DC110V of the 4-core output socket X4 and the -DC110V main line of the device load are returned and connected to the 2 terminal of the DC voltage / current meter to realize the working current display of the DC110V load.

[0093] like Figure 6 As shown, when the air switch KD1 of the experimental device is closed and powered on, the AC step-up transformer 21, rectifier bridge 22 and filter circuit 23 in the high-voltage power supply module 2 circuit start working, but there is no DC600V voltage output. Only when the DC600V start button QD5 is pressed, the AC220V power is connected to the AC220V AC contactor J1 coil circuit through the start button QD5, and the AC contactor J1 is pulled in, and the AC contactor J1 outputs +DC600V, -DC600V, + DC600V is sent to terminal 1 of the DC voltage / current display meter and the +DC600V main line of the device, and at the same time is sent to pin 1 of the DC600V output 4-core socket X5; -DC600V is sent to terminal 0 of the DC voltage / current display meter to realize real-time display of the voltage value; -DC600V at pin 3 of the DC600V output 4-core socket X5 and the -DC600V main line return of the device load are connected to terminal 2 of the DC voltage / current meter to realize the working current display of the DC600V load.

[0094] AC step-up transformer 21 is a dBK-3000VA model. Its input voltage is AC220V, and it offers multiple output voltages. This device selects AC425V. Rectifier bridge 22 utilizes two MZC300TS120P fast-acting rectifier diodes to achieve full-wave bridge rectification. To prevent overheating and burnout of the rectifier diodes, a 160×100×25 heat sink is used as the mounting base for the rectifier diodes, maximizing heat dissipation and reducing their operating temperature. The filter circuit 23 adopts LC filtering, the inductor L adopts EMI-JDLF60D-20AEMI power filter, and the capacitors C1, C2, C3, and C4 adopt four large-capacity 6800uF / 400V capacitors. Two of them are connected in series and then in parallel to meet the capacitor withstand voltage requirements. A 33K / 20W cement resistor is connected at both ends of each capacitor as the capacitor's balancing resistor. At the same time, the capacitor can be discharged after the test to achieve filtering and voltage stabilization, and can also improve the output load capacity.

[0095] The no-load voltage output by the full-wave bridge rectifier 22 and the LC filter circuit 23 is about DC620V, and the output voltage is above DC580V when loaded, which meets the DC600V power supply voltage range required by this device.

[0096] The 600V DC high-voltage power supply utilizes three levels of protection: first, overcurrent fuse FU9 at the input of the AC step-up transformer 21; second, overcurrent fuse FU10 at the output of the AC step-up transformer 21; and third, DC overcurrent fuse FU11 at the output of the filter circuit 23. The 600V DC high-voltage circuit of the test device is equipped with a delay circuit 24, implemented via a time-delay relay J5. The delay time of J5 is 20 seconds. After the capacitor has charged for 20 seconds, the delay relay J5 closes, stabilizing the rectifier output voltage.

[0097] In the embodiment, the test control circuit 3 includes a manual control circuit 31 and an automatic control circuit 32:

[0098] like Figure 7 As shown, the test control of manual control circuit 31 is selected using transfer switch SA1. AC220V control power is interlocked through transfer switch SA1 to connect AC contactor J3, closing it and placing it in a standby state. This is then combined with the start button QD4 of the DC110V power module 14 and the start button QD5 of the DC600V high-voltage power module 2 to control the DC110V and DC600V power supplies, respectively, to conduct a power-on test of the EMU heater control panel 8.

[0099] like Figure 8As shown, the test control of automatic control circuit 32 is selected using transfer switch SA1. AC220V control power is interlocked through transfer switch SA1 to connect AC contactor J2. Through two positive interlocking groups of AC contactor J2, one group provides AV220V power to lower computer 4, starting the PLC and entering standby mode; the other group sends AC220V power to the front end of the positive interlocking of intermediate relays K1 and K2 for standby use. When lower computer 4 automatically controls and issues a DC110V start command, intermediate relay K1 is energized, and AC220V power is interlocked through intermediate relay K1 to the coil of AC contactor KM1. AC contactor KM1 is energized, connecting the +DC110V output. When lower computer 4 automatically controls and issues a DC600V start command, intermediate relay K2 is energized, and AC220V power is interlocked through intermediate relay K2 to the coil of AC contactor KM3. AC contactor KM3 is energized, and the +DC600V output is sent to Huayang 4-core socket 511 and Jiangdao 4-core socket 611. Automatic test is mainly used for functional test of Huayang series control board 81 of EMU heater.

[0100] In the embodiment, the test device uses an OMRON CP1H-XA40DR-A PLC as the host computer 4. The PLC adopts a functional block design, and is designed with five major functional modules: PLC main program, maintenance mode module, data acquisition module, system self-test confirmation module, system self-test module, and automatic test module.

[0101] like Figure 1 、 9 As shown, pins 3 and 4 of the lower computer 4 are connected to the output end of the high-voltage power module 2 through a voltage transmitter, and pins 5 and 6 of the lower computer 4 are connected to the output end of the DC110V power module 14 through a voltage transmitter, for collecting voltage signals of the high-voltage power module 2 and the DC110V power module 14; pins 7 and 8 of the lower computer 4 are connected to a temperature sensor ST through a temperature transmitter, and the temperature sensor ST is set at the air outlet of the heating element RT1. The temperature sensor ST is used to collect temperature data of the load circuit (53) and transmit it to the lower computer 4 through the temperature transmitter BT; the power supply end of the voltage transmitter and the temperature transmitter BT are connected to the output end of the DC12V power module 12.

[0102] In an embodiment, Figure 9 As shown, the control board test circuit 5 includes a test interface component 51 , a working display circuit 52 and a load circuit 53 .

[0103] like Figure 10 、 11As shown, the test interface assembly 51 includes a Huayang 25-core socket JP1 and a Huayang 4-core socket 511; wherein, pins 1, 14, 3, and 16 of the Huayang 25-core socket JP1 are connected to the socket interface J3 on the Huayang series control board 81, pins 11 and 24 of the socket are connected to the socket interface J1 on the Huayang series control board 81, pins 4-9 of the socket are connected to the 6P socket J2-6 on the Huayang series control board 81, and pins 18-22 of the socket are connected to the 5P socket J2-5 on the Huayang series control board 81; the socket end of the Huayang 4-core socket 511 is connected to the J4 socket on the Huayang series control board 81;

[0104] like Figure 11 、 12 As shown, the working display circuit 52 is provided with a 5P socket indicator light circuit 521 and a 6P socket indicator light circuit 522. The 6P socket indicator light circuit 522 is connected to the 4-9 pins of the Huayang 25-core socket JP1 input end, and the 5P socket indicator light circuit 521 is connected to the 18-22 pins of the Huayang 25-core socket JP1 input end. Both the 5P socket indicator light circuit 521 and the 6P socket indicator light circuit 522 are provided with a power light, a fan light, a heating light and a fault light.

[0105] like Figure 9 As shown, the load circuit 53 includes a heating element RT1, a fan M1 and a thermistor RT2. The positive and negative poles of the heating element RT1 are connected to pins 2 and 4 of the Huayang 4-core socket 511. The heating element RT1 is composed of three thermistors in parallel, and a branch of one of the thermistors is provided with a relay K4 for control connection. The positive pole of the coil of the relay K4 is connected to the lower computer 4, and the negative pole is connected to the negative pole of the output terminal of the DC24V power module 13; the two ends of the fan M1 are connected to pins 3 and 16 of the input terminal of the Huayang 25-core socket JP1; the positive pole of the thermistor RT2 is connected to pin 1 of the input terminal of the Huayang 25-core socket JP1 through a relay K3, and the negative pole of the thermistor RT2 is connected to pin 14 of the input terminal of the Huayang 25-core socket JP1 through a temperature control switch KT1; the positive pole of the coil of the relay K3 is connected to the lower computer 4, and the negative pole is connected to the negative pole of the output terminal of the DC24V power module 13.

[0106] Example 2:

[0107] like Figure 1 、 13-As shown in Figure 16, compared with Example 1, Example 2 is provided with two sets of test circuits for testing different heater control boards 8. In addition to the control board test circuit 5 for testing the Huayang series control board 81 in Example 1, it also includes a second control board test circuit 6 connected in parallel with the control board test circuit 5 at the ends of the low-voltage power module 1 and the high-voltage power module 2. The second control board test circuit 6 is used to test the Jiangdao series control board 82; the second control board test circuit 6 includes a second interface component 61, a second display circuit 62 and a second load circuit 63.

[0108] like Figure 14 、 15 As shown in Figures 16 and 16, the second interface component 61 includes a Jiangdao 25-core socket JP2 and a Jiangdao 4-core socket 611; the socket end of the Jiangdao 25-core socket JP2 is plugged into the J21 and J20 socket ends on the Jiangdao series control board 82; the socket end of the Jiangdao 4-core socket 611 is plugged into the J20 socket end on the Jiangdao series control board 82, and the 1 and 3 pins of the input end of the Jiangdao 4-core socket 611 are connected to the output end of the high-voltage power module 2; the 25 and 13 pins of the input end of the Jiangdao 25-core socket JP2 are connected to the output end of the DC110V power module 14;

[0109] like Figure 13 As shown, the second display circuit 62 is connected to the input end of the Jiangdao 25-core socket JP2, and the second display circuit 62 is provided with a power light, a fan light, a heating light and a fault light;

[0110] like Figure 13 As shown, the second load circuit 63 includes a heating element RT3, a fan M2 and a thermistor RT4. The positive and negative poles of the heating element RT3 are connected to pins 2 and 4 of the Jiangdao 4-core socket 611, and the power of the heating element RT3 is 800W; the two ends of the fan M2 are connected to pins 1 and 14 of the input end of the Jiangdao 25-core socket JP2, the positive pole of the thermistor RT4 is connected to pin 11 of the input end of the Jiangdao 25-core socket JP2, and the negative pole of the thermistor RT4 is connected to pin 24 of the input end of the Jiangdao 25-core socket JP2 through the temperature control switch KT2.

[0111] For the Jiangdao series control board 82 of the EMU heater, the automatic control circuit 32 of this test device can perform partial functional tests, but there is no sampling of the fan M2, no temperature sampling and over-temperature protection function detection. The Jiangdao series control board 82 needs to use the manual test function of this device for a comprehensive test.

[0112] The working mode of the present invention is:

[0113] Step 1: Preparation before the test;

[0114] Step 1.1: Connect the power cord plug of the test bench of this device to the AC220V power distribution box, and then turn on the power switch of the distribution box;

[0115] Step 1.2: Close the power air switch KD1 inside the equipment, the red power indicator light will be on, and the AC voltmeter of the AC220V power main circuit will display a voltage value. Observe whether the input voltage is normal;

[0116] Step 1.3: Press the start button QD2 of the DC12V power module 12, the start button QD3 of the DC24V power module 13, the start button QD4 of the DC110V power module 14, and the start button QD5 of the high-voltage power module 2, respectively, and observe whether the voltage displayed by the corresponding DC voltmeter is normal. If abnormal, check and handle it. After the voltage detection is normal, disconnect the start button QD4 of the DC110V power module 14 and the start button QD5 of the high-voltage power module 2;

[0117] Step 1.4: According to the manufacturer and model of the EMU heater control board 8 to be tested, select the plug corresponding to the test bench and connect it. Connect the Huayang series control board 81 to the test interface component 51, and connect the Jiangdao series control board 82 to the second interface component 61;

[0118] Step 1.5: If it is the Huayang series control board 81-4 version, pay special attention to the fact that the polarity wire number of the high-voltage power module 2600V input plug must correspond to the power polarity of the socket on the board, otherwise the input power polarity will be reversed; at the same time, the DC110V power module 14 input socket pin pitch of the Huayang series control board 81-4 version is smaller than that of other boards, so the corresponding plug must be replaced.

[0119] Step 2: Manual test;

[0120] The manual test is used for troubleshooting and preliminary performance inspection of the EMU heater control panel 8. First, turn the test bench function conversion switch SA1 to the left manual gear. When you hear the sound of contactor J3 closing, it means that the manual control is normal.

[0121] When testing Huayang series control board 81:

[0122] Press the start button QD4 on the DC110V power module 14 and observe the indicator lights of the working display circuit 52 on the test bench panel. If the indicator lights do not light up, the power supply system of the Huayang series control board 81 under test is faulty. If the fan light does not light up, the DC24V power supply or output of the Huayang series control board 81 is faulty. If the power light, fan light, and fault light are on, the Huayang series control board 81 is operating normally. Then press the start button QD5 on the high-voltage power module 2 and observe the changes in the indicator lights. If the power light, fan light, fault light are off, and the heating light is on, the Huayang series control board 81 is operating normally. If the power light, fan light, and fault light are still on, the Huayang series control board 81 is operating normally.

[0123] When testing the A board in the Jiangdao series control board 82:

[0124] Press the start button QD4 of the DC110V power module 14, and observe the lighting of the indicator light of the second load circuit 63 on the experimental bench panel: if the indicator light is not on, it is determined that the power supply system of the tested Jiangdao series control board 82 is faulty; if the fan light is off, it is determined that the DC24V power supply or output of the Jiangdao series control board 82 is faulty; if the power light is on, the fan light is on, and the fault light is flashing, it is determined that the control of the Jiangdao series control board 82 is normal; then press the start button QD5 of the high-voltage power supply module 2, and observe the changes in the indicator light: if the power light is on, the fan light is on, the fault light is off, and the heating light is lit after a delay of 3-5 seconds, it is determined that the control of the Jiangdao series control board 82 is normal.

[0125] When testing the B board in the Jiangdao series control board 82:

[0126] Press the start button QD4 of the DC110V power module 14, and observe the lighting of the indicator light of the second load circuit 63 on the experimental bench panel: if the indicator light is not on, it is determined that the power supply system of the tested Jiangdao series control board 82 is faulty; if the fan light is off, it is determined that the DC24V power supply or output of the Jiangdao series control board 82 is faulty, and the fault light will light up at this time; if the power light is on and the fan light is on, it is determined that the control of the Jiangdao series control board 82 is normal; then press the start button QD5 of the high-voltage power supply module 2, and observe the changes in the indicator light: if the power light is on and the fan light is on, and the heating light is on after a delay of 3-5 seconds, it is determined that the control of the Jiangdao series control board 82 is normal.

[0127] Step 3: Automatic test;

[0128] The automatic test is used to test the comprehensive performance of the EMU heater control panel 8 after maintenance, and to intuitively display and record the main parameters of the heater control panel 8 to the host computer 7;

[0129] Step 3.1: Make preparations before the test and confirm that the connections are correct;

[0130] Step 3.2: Press the start button QD2 of the DC12V power module 12, the start button QD3 of the DC24V power module 13, the start button QD4 of the DC110V power module 14, and the start button QD5 of the high-voltage power module 2;

[0131] Step 3.3: Turn the function conversion switch SA1 of the experimental bench to the automatic gear position. When you hear the sound of contactor J2 being attracted, it means that the automatic conversion is normal.

[0132] Step 3.4: Open the PC host of host computer 7 and open the "Heater Test Data" window. First, select the power. The program defaults to 1000W. If you want to select 800W, click the 800W switch button in the window. Host computer 7 sends a command to slave computer 4, which controls relay K4 to attract, and the power of heating element RT1 changes from 1000W to 800W.

[0133] Click "Manual Test"; click "Turn on Control Power" to load DC110V power to the device; click "Turn on Working Power" to control relay K2 to close, thereby controlling contactor KM3 to close and load DC600V power; Overtemperature Test: Click "Turn on Simulated Temperature" to control relay K2 to open, thereby controlling contactor KM3 to open and cut off DC600V power supply; To resume the test, click "Turn on Simulated Temperature" again;

[0134] Click "Auto Test" to start the device. The host computer 7 displays the operating voltage output from the heater control board 8 to the fan, the temperature at the heating element outlet, the DC110V voltage supplied by the device to the heater control board 8, and the DC600V voltage supplied by the device to the heater control board 8. The automatic test lasts for 180 seconds, with the first 61 to 120 seconds simulating the 80°C over-temperature protection state, and the first 121 to 180 seconds resuming normal operation.

[0135] The main parameters of the heater control panel 8 are stored in the host computer 7, and the test data of the heater control panel 8 can be managed in a refined manner.

[0136] 1Click "This PC" and a window will pop up;

[0137] 2 Click "Heater Test Data" to pop up the test data list;

[0138] 3 Select the item to be queried, double-click it, and an Excel data table will pop up. The parameters are displayed in 4 columns. The first column is DC110V working voltage; the second column is DC600V working voltage; the third column is DC24 V working voltage; the fourth column is the temperature change of the heating element outlet.

[0139] It should be noted that the above detailed description of the technical solution of the present invention and the principles of the present invention are provided. The above description of the working principle is only intended to help understand the core concept of the present invention. It should be noted that those skilled in the art can improve and modify the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0140] Those skilled in the art may modify, supplement, or replace the described embodiments with similar methods, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims. Therefore, the scope of protection of the patent for this invention shall be based on the appended claims.

Claims

1. CR200J EMU heater control panel test device, characterized by: include: A low-voltage power supply module (1), the input end of which is connected to an AC220V power supply, for providing low-voltage power to components in the circuit; A high-voltage power supply module (2) having an input end connected in parallel to an AC220V power supply for providing a high-voltage power supply to a heater control panel (8); The test control circuit (3) has an input end connected in parallel to an AC220V power supply, and a control end connected to a circuit between the control board test circuit (5) and the low-voltage power module (1) and the high-voltage power module (2), and is used to control the power on and off of the heater control board (8); A lower computer (4) is connected to the test control circuit (3) and the control board test circuit (5) and is used to control the circuit and collect data; A control board test circuit (5) has an input end connected in parallel to the output ends of the low-voltage power supply module (1) and the high-voltage power supply module (2), and an output end connected to the heater control board (8) for testing the heater control board (8); The control board test circuit (5) comprises: A test interface assembly (51), the interface end of which is connected to the heater control panel (8); A working display circuit (52) is connected to the test interface assembly (51) and is used to display the working status of the heater control panel (8); The load circuit (53) is connected to the first test interface assembly (51), and the control end is connected to the lower computer (4), and is used to provide a load for the heater control panel (8).

2. The CR200J EMU heater control panel test device according to claim 1 is characterized in that: A control board test circuit (5) and a second control board test circuit (6) are connected in parallel to the ends of the low-voltage power supply module (1) and the high-voltage power supply module (2); the control board test circuit (5) is used to test the Huayang series control board (81), and the second control board test circuit (6) is used to test the Jiangdao series control board (82); the second control board test circuit (6) includes: A second interface component (61), the interface being connected to the Jiangdao series control panel (82); A second display circuit (62), connected to the second interface assembly (61), for displaying the working status of the Jiangdao series control panel (82); The second load circuit (63) is connected to the second interface component (61) and is used to provide a load for the Jiangdao series control board (82).

3. The CR200J EMU heater control panel test device according to claim 1, characterized in that: The low-voltage power supply module (1) comprises a DC5V power supply module (11), a DC12V power supply module (12), a DC24V power supply module (13) and a DC110V power supply module (14) connected in parallel; The output ends of the four power modules are all connected in parallel with a voltmeter and a socket, and the positive poles of the input ends and output ends of the four power modules are all provided with a control button and a fuse.

4. The CR200J EMU heater control panel test device according to claim 1, characterized in that: The high-voltage power supply module (2) comprises an AC step-up transformer (21), a rectifier bridge (22) and a filter circuit (23) connected in series in sequence. The input end of the AC step-up transformer (21) is connected to an AC220V power supply. The output end of the filter circuit (23) is provided with an AC contactor J1. The output end of the AC contactor J1 is connected in parallel to an ammeter and a socket X5. The positive electrode of the output end of the filter circuit (23), the input end and the positive electrode of the output end of the AC step-up transformer (21) are all provided with fuses; A delay circuit (24) is connected in parallel to the positive pole between the rectifier bridge (22) and the filter circuit (23), and an AC220V power supply is connected in parallel to the power supply end of the delay circuit (24).

5. The CR200J EMU heater control panel test device according to claim 3 is characterized in that: The test control circuit (3) includes a manual control circuit (31) and an automatic control circuit (32) whose input ends are connected in parallel to an AC220V power supply; the input ends of the manual control circuit (31) and the automatic control circuit (32) are switched via a conversion switch SA1; The interlock output end of the manual gear position of the conversion switch SA1 of the manual control circuit (31) is connected to the AC contactor J3, and the AC contactor J3 has two interlocking groups. The input ends of the two interlocking groups are respectively connected to the positive output ends of the DC110V power module (14) and the high-voltage power module (2). The output ends of the two interlocking groups are connected in parallel to the control board test circuit (5) and the second control board test circuit (6); The interlock output terminal of the automatic gear position of the switching switch SA1 of the automatic control circuit (32) is connected to the AC contactor J2. The AC contactor J2 has two interlocking groups. The input terminals of the two interlocking groups are connected to the positive pole of the AC220V power supply. The output terminal of one interlocking group is connected to the positive pole of the power supply terminal of the lower computer (4). The output terminal of the other interlocking group is connected in parallel to the interlocking input terminals of the intermediate relays K1 and K2. The interlocking output terminal of the intermediate relay K1 is connected to the positive pole of the coil of the AC contactor KM1. The interlocking input terminal of the AC contactor KM1 is connected to the output terminal of the DC110V power module (14). The interlocking output terminal is connected in parallel to the control board test terminal. The interlock output terminal of the intermediate relay K2 is connected to the positive pole of the coil of the AC contactor KM3, the interlock input terminal of the AC contactor KM3 is connected to the output terminal of the high-voltage power module (2), and the interlock output terminal is connected in parallel to the control board test circuit (5) and the second control board test circuit (6); the positive poles of the coils of the intermediate relays K1 and K2 are connected to the lower computer (4), and the negative poles of the coils are connected to the negative pole of the output terminal of the DC24V power module (13); the negative pole of the power supply terminal of the lower computer (4) and the negative poles of the coils of the AC contactors J2, KM1, and KM3 are connected in parallel to the negative pole of the AC220V power supply.

6. The CR200J EMU heater control panel test device according to claim 1, characterized in that: The test interface assembly (51) includes a Huayang 25-core socket JP1 and a Huayang 4-core socket (511); wherein, pins 1, 14, 3, and 16 of the Huayang 25-core socket JP1 are connected to the socket interface J3 on the Huayang series control board (81), pins 11 and 24 of the socket are connected to the socket interface J1 on the Huayang series control board (81), pins 4-9 of the socket are connected to the 6P socket J2-6 on the Huayang series control board (81), and pins 18-22 of the socket are connected to the 5P socket J2-5 on the Huayang series control board (81); the socket end of the Huayang 4-core socket (511) is connected to the J4 socket on the Huayang series control board (81); The working display circuit (52) is provided with a 5P socket indicator light circuit (521) and a 6P socket indicator light circuit (522), the 6P socket indicator light circuit (522) is connected to pins 4-9 of the Huayang 25-core socket JP1 input end, the 5P socket indicator light circuit (521) is connected to pins 18-22 of the Huayang 25-core socket JP1 input end, and both the 5P socket indicator light circuit (521) and the 6P socket indicator light circuit (522) are provided with a power light, a fan light, a heating light and a fault light; The load circuit (53) includes a heating element RT1, a fan M1, and a thermistor RT2. The positive and negative poles of the heating element RT1 are connected to pins 2 and 4 of a Huayang 4-core socket (511). The heating element RT1 is composed of three thermistors connected in parallel. A branch of one thermistor is provided with a relay K4 for control connection. The positive pole of the coil of the relay K4 is connected to the lower computer (4), and the negative pole is connected to the negative pole of the output end of the DC24V power module (13); the two ends of the fan M1 are connected to pins 3 and 16 of the input end of the Huayang 25-core socket JP1; the positive pole of the thermistor RT2 is connected to pin 1 of the input end of the Huayang 25-core socket JP1 through a relay K3, and the negative pole of the thermistor RT2 is connected to pin 14 of the input end of the Huayang 25-core socket JP1 through a temperature control switch KT1; the positive pole of the coil of the relay K3 is connected to the lower computer (4), and the negative pole is connected to the negative pole of the output end of the DC24V power module (13).

7. The CR200J EMU heater control panel test device according to claim 6, characterized in that: The lower computer (4) is a PLC control module; Pins 3 and 4 of the lower computer (4) are connected to the output end of the high-voltage power module (2) through a voltage transmitter, and pins 5 and 6 of the lower computer (4) are connected to the output end of the DC110V power module (14) through a voltage transmitter; Pins 7 and 8 of the lower computer (4) are connected to a temperature sensor ST via a temperature transmitter. The temperature sensor ST is arranged at the air outlet of the heating element RT1. The power supply end of the temperature transmitter BT is connected to the output end of the DC12V power module (12). The power supply ends of the voltage transmitter and the temperature transmitter are connected to the output end of the DC12V power module (12).

8. The CR200J EMU heater control panel test device according to claim 2, characterized in that: The second interface component (61) includes a Jiangdao 25-core socket JP2 and a Jiangdao 4-core socket (611); the socket end of the Jiangdao 25-core socket JP2 is plugged into the J21 and J20 socket ends on the Jiangdao series control board (82); the socket end of the Jiangdao 4-core socket (611) is plugged into the J20 socket end on the Jiangdao series control board (82); the 1st and 3rd pins of the input end of the Jiangdao 4-core socket (611) are connected to the output end of the high-voltage power module (2); the 25th and 13th pins of the input end of the Jiangdao 25-core socket JP2 are connected to the output end of the DC110V power module (14); The second display circuit (62) is connected to the input end of the Jiangdao 25-core socket JP2, and the second display circuit (62) is provided with a power light, a fan light, a heating light and a fault light; The second load circuit (63) includes a heating element RT3, a fan M2, and a thermistor RT4. The positive and negative poles of the heating element RT3 are connected to pins 2 and 4 of a Jiangdao 4-core socket (611). The power of the heating element RT3 is 800W. The two ends of the fan M2 are connected to pins 1 and 14 of an input end of a Jiangdao 25-core socket JP2. The positive pole of the thermistor RT4 is connected to pin 11 of the input end of the Jiangdao 25-core socket JP2. The negative pole of the thermistor RT4 is connected to pin 24 of the input end of the Jiangdao 25-core socket JP2 via a temperature control switch KT2.

9. The CR200J EMU heater control panel test device according to claim 1, characterized in that: An air switch KD1 is provided on the trunk line in parallel with the low-voltage power supply module (1), the high-voltage power supply module (2), the test control circuit (3) and the AC220V power supply, a voltage and current meter and a socket are connected in parallel at the output end of the air switch KD1, and a fuse FU1 is provided at the positive pole of the output end of the air switch KD1; a multi-purpose socket is connected in parallel at the input end of the air switch KD1, and a host computer (7) is connected to the multi-purpose socket, the host computer (7) is a computer, and the host computer (7) is electrically connected to the slave computer (4).

10. A CR200J EMU heater control panel test device, based on the CR200J EMU heater control panel test device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Preparation before the test: Close the air switch KD1, the power indicator light will light up, and the AC voltmeter will display the voltage value. Observe whether the input voltage is normal; press the start button of the DC12V power module (12), DC24V power module (13), DC110V power module (14) and high-voltage power module (2) respectively, and observe whether the voltage displayed by the corresponding DC voltmeter is normal. If it is abnormal, check and deal with it. After the voltage is normal, disconnect the start button of the DC110V power module (14) and the high-voltage power module (2); select the connection plug corresponding to the test bench according to the manufacturer and model of the heater control board (8) to be tested; S2: Manual test: used for troubleshooting and preliminary performance inspection of the EMU heater control panel (8). Turn the test bench function conversion switch SA1 to the manual position. When you hear the sound of contactor J3 closing, it means that the manual control is normal. S3: Automatic test: used for comprehensive performance test of the heater control panel (8) after repair, and visually display and record the main parameters of the heater control panel (8) of the EMU on the host computer (7); make preparations before the test, confirm that the connection is correct, press the DC12V, DC24V, DC110V, DC600V start button; turn the function conversion switch SA1 of the test bench to the automatic gear, and hear the J2 contactor pull in, indicating that the automatic conversion is normal; S4: Data storage and query: The host computer (7) stores the main test parameters of the EMU heater control panel (8), and simultaneously performs electronic and refined management of the test data of the EMU heater control panel (8); The step S2 further comprises the following test steps: S2.1: When testing the Huayang series control panel (81): Press the start button of the DC110V power module (14) and observe the lighting of the indicator light of the output experimental table panel working display circuit (52); if the indicator light is not lit, it is determined that the power supply system of the Huayang series control board (81) has a fault; if the fan light is not lit, it is determined that the DC24V power supply or output of the Huayang series control board (81) has a fault; if the power light is lit, the fan light is lit, and the fault light is flashing, it means that the control of the Huayang series control board (81) is normal; then press the start button QD5 of the high-voltage power module (2) and observe the changes in the indicator light; if the power light is lit, the fan light is lit, the fault light is off, and the heating light is lit, it means that the control of the Huayang series control board (81) is normal; if the power light is lit, the fan light is lit, and the fault light is still flashing, it means that the DC600V controlled by the Huayang series control board (81) has no input or the DC600V input sampling circuit has a fault; S2.2: When testing the A board in the Jiangdao series control board 82: Press the start button QD4 of the DC110V power module (14) and observe the lighting of the indicator light of the second load circuit (63) on the experimental table panel: if the indicator light is not lit, it is determined that the power supply system of the tested Jiangdao series control board (82) is faulty; if the fan light is not lit, it is determined that the DC24V power supply or output of the Jiangdao series control board (82) is faulty; if the power light is lit, the fan light is lit, and the fault light is flashing, it is determined that the control of the Jiangdao series control board (82) is normal; then press the start button QD5 of the high-voltage power module (2) and observe the changes in the indicator light: if the power light is lit, the fan light is lit, the fault light is off, and the heating light is lit after a delay of 3-5 seconds, it is determined that the control of the Jiangdao series control board (82) is normal. S2.3: When testing the B board in the Jiangdao series control board (82): Press the start button QD4 of the DC110V power module (14) and observe the lighting of the indicator light of the second load circuit (63) on the experimental table panel: if the indicator light is not lit, it is determined that the power supply system of the tested Jiangdao series control board (82) has a fault; if the fan light is not lit, it is determined that the DC24V power supply or output of the Jiangdao series control board (82) has a fault, and the fault light will light up at this time; if the power light is lit and the fan light is lit, it is determined that the control of the Jiangdao series control board (82) is normal; then press the start button QD5 of the high-voltage power module (2) and observe the changes in the indicator light: if the power light is lit and the fan light is lit, the heating light is lit after a delay of 3-5 seconds, it is determined that the control of the Jiangdao series control board (82) is normal.

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