A testing method for high-speed rail on-vehicle equipment

Abstract

The present invention relates to a method for testing high-speed rail on-vehicle equipment. The steps are as follows: The NI instrument hardware platform simulates signals with the same communication protocol as the test items of the equipment under test, and connects them to the corresponding interfaces of the interface adapter box. The other end of the interface adapter box connects the signals to the heavy-duty cable part of the equipment under test; the internal wiring of the equipment under test is used to connect to the corresponding board interfaces inside the equipment under test, and the corresponding signals are transmitted to the corresponding boards in the equipment under test; the corresponding boards in the equipment under test analyze the signals and transmit them to the main control board of the ATP for analysis. The analyzed information is returned to the corresponding boards of the NI instrument hardware platform, and the returned information is transmitted to the host board of the NI instrument hardware platform for accuracy judgment to obtain the correctness of the test items. The present invention can eliminate signal interference caused by human factors, and at the same time corresponds to multiple boards, avoiding plugging errors, being convenient and fast to operate, and ensuring the integrity of the test.

Description

Technical Field

[0001] The present invention belongs to the technical field of testing high-speed rail on-vehicle equipment, and particularly relates to a method for testing high-speed rail on-vehicle equipment. Background Art

[0002] The CTCS3-400T on-vehicle equipment in high-speed rail on-vehicle equipment (CTCS, Chinese Train Control System, hereinafter briefly referred to as on-vehicle equipment) can calculate the target distance, continuous speed, and control mode curve in real time according to basic data such as train data, movement authority, and track data, and automatically protect the train from overspeed according to the curve. The CTCS3-400T on-vehicle equipment mainly includes subsystems such as an on-vehicle main control unit, a balise transmission module BTM, a track circuit information reader TCR, a judicial recording unit JRU, a mobile terminal MT, and a train interface unit. When the on-vehicle equipment operates at the CTCS-3 (Level 3 of the Chinese Train Control System) safety level, the movement authority and track data adopt the data provided by the RBC (Radio Block Center). When it operates at the CTCS-2 (Level 2 of the Chinese Train Control System) safety level, the movement authority and track data adopt balise data and track circuit information.

[0003] The safety level of the on-vehicle equipment directly affects its reliability, and further affects people's travel safety. Therefore, it is necessary to conduct safety performance tests on the on-vehicle equipment to ensure the reliability of operation. Currently, when conducting safety performance tests on the on-vehicle equipment, due to the large number of test items, for different test items, the signal lines of the equipment to be tested need to be manually plugged into the corresponding data acquisition interfaces of the test equipment in different wire troughs respectively. Since the test items are different, the signal cables to be plugged are also different. Sometimes, different wire troughs need to be coordinated at the same time, and manual operation is prone to errors and low efficiency. Moreover, when plugging, there are many nodes on the test chain. If the signal line connection is unreliable, it will increase the fault points and need to be excluded one by one. This kind of manual plugging is unstable and may become loose during the test process, which has a direct impact on the quality of signal transmission, cannot guarantee the accuracy rate of the test results, and does not meet the high-precision measurement requirements for the safety performance test of on-vehicle equipment. Therefore, it is necessary to develop a complete machine test tooling for CTCS3-400T on-vehicle equipment to enable faster and more accurate testing.

[0004] Currently, there is no reported high-speed rail on-vehicle equipment test method that can meet the above requirements to judge the performance of on-vehicle products. Summary of the Invention

[0005] Aiming at the deficiencies in the prior art that when testing the safety of on-vehicle equipment, manually plugging and unplugging signal lines is error-prone and inefficient, etc., the technical problem to be solved by the present invention is to provide a testing method for high-speed rail on-vehicle equipment, which eliminates signal interference caused by human factors, realizes overall plugging and unplugging, can correspond to multiple boards at the same time, avoids plugging errors, is convenient and fast to operate, and ensures the integrity of the test.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is:

[0007] The present invention provides a testing method for high-speed rail on-vehicle equipment. The equipment to be tested is the on-vehicle CTCS3-400T system, which includes an ATP main control board, an ATP communication board, an ATP output board, an ATO board, a BTM unit, and a TCR host; the testing equipment is the NI instrument hardware platform, which includes an IO function board, a pulse function board, an MVB communication board, a CAN communication board, an RS422 communication board, and a host board; the testing equipment realizes communication and testing of the equipment to be tested through an interface adapter box and a cable. The steps are as follows:

[0008] The NI instrument hardware platform simulates signals with the same communication protocol as the item to be tested of the equipment to be tested through the board corresponding to the item to be tested.

[0009] Connect the above signals to the corresponding interfaces of the interface adapter box, and then connect the signals to the heavy-duty cable part of the equipment to be tested through the other end of the interface adapter box by a cable.

[0010] Utilize the internal wiring of the equipment to be tested to connect to the corresponding board interfaces inside the equipment to be tested, and transfer the corresponding signals to the corresponding boards of the equipment to be tested.

[0011] The corresponding board of the equipment to be tested analyzes the signals, and transfers the analyzed signals to the ATP main control board for analysis. The ATP main control board then returns the analyzed information to the corresponding board of the NI instrument hardware platform according to the communication protocol through the ATP communication board.

[0012] After the corresponding board of the NI instrument hardware platform receives the returned information, it transfers the returned information to the host board of the NI instrument hardware platform for correctness judgment, so as to obtain the correctness of the item to be tested.

[0013] Connect the above signals to the corresponding interfaces of the interface adapter box, and then connect the signals to the heavy-duty cable part of the equipment to be tested through the other end of the interface adapter box by a cable. Specifically:

[0014] The adapter box body of the interface adapter box is rotatably installed on the slideway of the adapter box mounting rack, and the signals with the same communication protocol as the item to be tested of the equipment to be tested are connected to the front interfaces of the adapter box body.

[0015] Push the main body of the adapter box towards the test device until the rear interface of the adapter box main body docks with the test device interface inside the adapter box mounting bracket;

[0016] Lock the main body of the adapter box and the adapter box mounting bracket through the positioning and locking device to achieve a reliable signal connection.

[0017] The interface adapter box includes an adapter box main body and an adapter box mounting bracket. The adapter box mounting bracket is fixedly installed outside the interface end of the test device. The adapter box mounting bracket has a support plate and a positioning and locking device. The support plate is installed on the operating table surface and is provided with a slideway. The main body of the adapter box is installed on the slideway through a plurality of rollers provided at its bottom; the rear interface of the adapter box of the adapter box main body is plugged into the test device interface and locked through the positioning and locking device, and the front interface of the adapter box is plugged into the in-vehicle device interface layer of the device under test through a cable.

[0018] The positioning and locking device has first and second bumps, first and second locking hooks, a longitudinally telescopic link, and a rotating plate. The first and second bumps are fixedly provided on the side wall of the adapter box main body. The first and second locking hooks are installed on the longitudinally telescopic link. The installation height of the first locking hook is adapted to the first bump, and the installation height of the second locking hook is adapted to the second bump. The longitudinally telescopic link is installed on the front side of the adapter box mounting bracket. The rotating plate is rotatably provided on the side of the adapter box mounting bracket and can be abutted against one of the first and second locking hooks.

[0019] In the positioning and locking device, the first and second bumps, the first and second locking hooks, and the longitudinally telescopic link are in two groups. The two groups of first and second bumps are respectively provided on the two side walls of the adapter box main body. The two groups of first and second locking hooks and the longitudinally telescopic link are respectively provided on the two sides of the front side of the adapter box mounting bracket. A transverse linkage rod is fixedly installed between the moving ends of the two longitudinally telescopic links.

[0020] A limiting block is provided on the adapter box mounting bracket corresponding to the upper side of the second locking hook.

[0021] The openings of the first and second locking hooks face upward and are in the shape of a wedge with a wider upper part and a narrower lower part.

[0022] The rotating plate has two stable positions corresponding to the locking state and the release state respectively. A top block that can cooperate with the first locking hook or the second locking hook is provided on the rotating plate, and an operating rod is also provided on the rotating plate.

[0023] At each connection part between the rear interface of the adapter box of the adapter box main body and the test device interface, and between the front interface of the adapter box and the in-vehicle device interface layer of the device under test, a convex and concave groove quick plug-in structure is adopted.

[0024] The interface adapter box adds an interface for introducing external power.

[0025] The present invention has the following beneficial effects and advantages:

[0026] 1. The main body of the adaptation box of the present invention is arranged on the adaptation box mounting rack. Through the positioning and locking device and the limiting structure, the connection between the boards is very tight, eliminating signal interference caused by human factors, realizing overall plugging and unplugging, being able to correspond to multiple boards simultaneously, avoiding plugging errors, being convenient and fast to operate, and ensuring the integrity of the test.

[0027] 2. The method of the present invention constructs a general test platform. More interfaces can be inserted on this test platform, shortening the wire-changing time and enabling faster and more accurate testing.

[0028] 3. Based on the NI instrument hardware development platform, the present invention utilizes high-speed modular hardware and virtual instrument technology, combines flexible software processes to complete various tests and realize automated applications, and is self-defined when used by users, having characteristics such as high performance, expandability, short development cycle, and strong compatibility.

[0029] 4. Combining the actual operation requirements of the equipment, the present invention realizes the external hardware function simulation and performance verification of the equipment under test by developing the application program and test program of the equipment under test. Through the test of the hardware communication interface and the I / O quantity, the overall machine test of the on-vehicle equipment of CTCS3 - 400T is finally realized, and the integrity of the function of the on-vehicle equipment is judged through the overall machine test. Description of the Drawings

[0030] Figure 1 It is a structure diagram of the simulation environment of an overall machine test platform for large-iron on-vehicle of the present invention;

[0031] Figure 2 It is a principle block diagram of pulse test in the present invention;

[0032] Figure 3 It is a principle block diagram of signal acquisition of the I / O interface in the present invention;

[0033] Figure 4 It is a principle block diagram of driving of the I / O function board in the present invention;

[0034] Figure 5 It is a test flow chart of CAN communication in the present invention;

[0035] Figure 6 It is a test flow chart of RS422 in the present invention;

[0036] Figure 7 It is a test flow chart of MVB in the present invention;

[0037] Figure 8 It is a test flow chart of vehicle integrity in the present invention;

[0038] Figure 9ASchematic diagram (I) of the connection structure between the interface adapter box and the test equipment and its initial state in the present invention;

[0039] Figure 9B Schematic diagram (II) of the connection structure between the interface adapter box and the test equipment and its initial state in the present invention;

[0040] Figure 10 Simplified diagram of the state when the connection structure between the interface adapter box and the test equipment in the present invention enters a state;

[0041] Figure 11 Schematic diagram of the locking structure between the interface adapter box and the test equipment in the present invention;

[0042] Figure 12 Schematic diagram of the longitudinal telescopic link and the transverse linkage rod structure in the present invention;

[0043] Figure 13 Schematic diagram of the rotating plate structure in the present invention;

[0044] Figure 14 Schematic diagram (I) of the locked state between the interface adapter box and the test equipment in the present invention;

[0045] Figure 15 Schematic diagram (II) of the locked state between the interface adapter box and the test equipment in the present invention;

[0046] Figure 16 Schematic diagram of the convex and concave groove structure on the inner wall of the cable socket involved in the present invention;

[0047] Figure 17 Schematic diagram of the convex and concave groove structure on the outer wall of the cable plug involved in the present invention.

[0048] Among them, 1 is the interface adapter box, 101 - 102 are the first - second convex blocks, 103 is the interface at the rear of the adapter box, 104 is the interface at the front of the adapter box, 2 is the adapter box mounting frame, 201 is the support plate, 202 is the slideway, 203 is the test equipment interface, 204 is the first locking hook, 205 is the second locking hook, 206 is the rotating plate, 206A is the top block, 207 is the longitudinal telescopic link, 208 is the transverse linkage rod, and 209 is the limit block. Detailed implementation mode

[0049] The present invention will be further described below with reference to the accompanying drawings of the specification.

[0050] The present invention provides a test method for high - speed rail on - vehicle equipment. The equipment to be tested involves the on - vehicle CTCS3 - 400T system, such as Figure 1As shown in the figure, it includes an ATP main control board (ATP, Automatic Train Protection), an ATP communication board, an ATP output board, an ATO board, a BTM unit, and a TCR host (TCR, Track Circuit Reader); the test equipment is an NI instrument hardware platform (a platform provided by National Instruments (NI) Co., Ltd., hereinafter referred to as NI), which includes an IO function board, a pulse function board, an MVB communication board (MVB, Multi-function Vehicle Bus), a CAN communication board, an RS422 communication board, and a main board; Figure 1 The ATP layer application program, ATO application layer program, test program, etc. mentioned in this are all prior arts.

[0051] In the present invention, the test equipment realizes communication and testing of the equipment under test through an interface adapter box and a cable. The steps are as follows:

[0052] The NI instrument hardware platform simulates signals with the same communication protocol as the item under test of the equipment under test through the board corresponding to the item under test;

[0053] Connect the above signals to the corresponding interfaces of the interface adapter box, and then connect the signals to the heavy-duty cable part of the equipment under test through the other end of the interface adapter box by a cable;

[0054] Utilize the internal wiring of the equipment under test to connect to the corresponding board interfaces inside the equipment under test, and transmit the corresponding signals to the corresponding boards of the equipment under test;

[0055] The corresponding board of the equipment under test analyzes the signals, and transmits the analyzed signals to the ATP main control board for analysis. The ATP main control board then returns the analyzed information to the corresponding board of the NI instrument hardware platform according to the communication protocol through the ATP communication board;

[0056] After receiving the return information, the corresponding board of the NI instrument hardware platform transmits the return information to the main board of the NI instrument hardware platform for accuracy judgment, so as to obtain the correctness of the item under test.

[0057] The items under test that can be realized by the method of the present invention include MVB communication, CAN communication, pulse communication, I / O test, RS422, and vehicle integrity;

[0058] The method of the present invention conducts a complete machine test on the CTCS3-400T system in high-speed rail on-vehicle equipment. Figure 1For the simulation environment structure of the whole machine test platform for high-speed rail on-vehicle equipment, the composition of CTCS3-400T in high-speed rail on-vehicle equipment is as follows: For the ATP system, there is one power supply board for each of the left and right systems, one output board for each of the left and right systems, one input board for each of the left and right systems, one Profi board (Profi communication protocol) for each of the left and right systems, one RCC board (RCC communication protocol) for each of the left and right systems, and one communication board for each of the left and right systems;

[0059] In the ATP system interface layer: One power supply introduction board for each of the left and right systems, one relay I for each of the left and right systems, one relay II for each of the left and right systems, speed input, T&R board (connection board for the externally output interface, T is the abbreviation of TCR equipment, R is the data configuration interface), D&S (connection board for the externally output interface, D is the DMI (human-machine interface) interface, S is the STM interface), B&M board (connection board for the externally output interface, B is the transponder transmission equipment BTM, M is the radio equipment MT).

[0060] In the on-vehicle system, the ATO host: One ATO board for each of the left and right systems, the ATO interface layer: ATO-I / O, TCR host.

[0061] The "left and right systems" are two sets of boards with exactly the same electrical structure built into the ATP system. Only the left or right system is put into use during normal vehicle operation. In case of a fault, it will be automatically switched instantaneously, serving as a backup for each other.

[0062] In this embodiment, X1 is the heavy-duty No. 1 cable, the I / O cable of the on-vehicle equipment to the outside;

[0063] X2 is the heavy-duty No. 2 cable, the I / O cable of the on-vehicle equipment to the outside;

[0064] X3 is the heavy-duty No. 3 cable, the on-vehicle power cable of the on-vehicle equipment to the outside;

[0065] X4, X12, X13 are CAN communication cables, from the heavy-duty end to the interface layer end;

[0066] X5 is an RS422 communication cable, from the heavy-duty end to the interface layer end;

[0067] X8, X9 are MVB communication cables, from the heavy-duty end to the interface layer end;

[0068] X6, X7, X14, X15 are serial communication cables, from the heavy-duty end to the interface layer end;

[0069] X16 is an I / O interface cable, the internal I / O cable from the heavy-duty end to the interface end.

[0070] As Figure 7 shown, the MVB communication test process of the device under test is as follows:

[0071] NI simulates a set of protocols through its own MVB communication board card to communicate with the on-vehicle CTCS3-400T system of the device under test with the same MVB signals; connects the MVB signals to the MVB interface of the interface adapter box; then connects the communication signals to the heavy-duty cable part (X1 to X3) of the on-vehicle CTCS3-400T system through a communication cable, and connects to the ATP communication board through the internal wiring of the on-vehicle CTCS3-400T system. Therefore, the MVB communication information of NI can be transmitted to the ATP communication board. After the ATP communication board decodes the communication information, it transmits it to the ATP main control board to output the corresponding quantity (communication information) according to the logic, and returns the MVB information corresponding to the quantity to the ATP communication board according to the protocol. The ATP communication board then sends the MVB information to the MVB communication board card of NI; after the MVB communication board card receives the information content, it transmits it to the NI main board card for accuracy judgment, so as to obtain the correctness of this channel.

[0072] As Figure 5 shown, the CAN communication test process of the device under test is as follows:

[0073] NI simulates a set of protocols through its own CAN communication board card to communicate with the CAN signals of the on-vehicle CTCS3-400T system of the device under test; connects the CAN signals to the CAN interface of the interface adapter box; connects the communication information to the heavy-duty cable part (X12, X13, X4) of the device under test through a communication cable, and connects to its ATP communication board through the internal wiring of the device under test, transmits the CAN communication information to the ATP communication board for decoding and then to the ATP main control board for analysis, and returns the analyzed CAN information to the ATP main control board according to the protocol, and then returns the parsed CAN information to the ATP communication board according to the protocol. The ATP communication board sends the CAN information to the CAN communication board card of NI, and the CAN communication board card transmits the received information to the main board card of NI for accuracy judgment, so as to obtain the correctness of this channel.

[0074] As Figure 2 shown, the pulse communication test process of the device under test is as follows:

[0075] NI simulates the same signals as the pulse communication of the on-vehicle CTCS3-400T system of the device under test through 3 groups of protocols using a pulse function board card. The frequencies of the pulse signals are 10HZ, 20HZ, and 30HZ respectively. The pulse signals are connected to the pulse communication interface of the interface adapter box, and the communication information is connected to the heavy-duty cable part (signal cable X2) of the device under test through a communication cable. It is connected to the ATP input board through the internal wiring of the device under test, and the pulse communication information is transmitted to the ATP main control board for analysis. Then, the analyzed pulse information is returned to the ATP communication board according to the protocol and sent to the CAN communication board card of NI. The CAN communication board of NI transmits the information to the host board card of NI for accuracy judgment, so as to obtain the correctness of this channel.

[0076] In this test process, 4-channel pulse signals are generated using the pulse function board card of NI, and the pulse signals are transmitted to the heavy-duty cable part of the device under test, and the received pulse signals are sent out through the CAN bus. When testing the ATP fast transmission pulse, the ATP output board needs to output 1-way 24V power to the pulse function board card of NI for power supply, that is, activation, under the control of the ATP main control. In the upper computer, by judging whether the frequencies of the sent pulse signals and the collected pulse signals are equal, and there are 3 types of frequency contents, namely 10HZ, 20HZ, and 30HZ, to judge whether the pulse acquisition function is normal.

[0077] Operation method:

[0078] Connect the pulse cable of the interface adapter box to the heavy-duty cable of the on-vehicle device, and connect a CAN cable at the same time;

[0079] Select the pulse input channel in the upper computer (i.e., the host board card of NI), and set the initial frequencies of the 4 channels to 10HZ;

[0080] Switch the set frequencies on the upper computer interface to 20HZ and 30HZ respectively;

[0081] Set the set frequencies on the upper computer interface to 10HZ, 20HZ, and 30HZ in sequence;

[0082] The upper computer judges whether the frequencies of the collected pulse signals are consistent.

[0083] The test process of the input quantity of the on-vehicle device for the I / O test of the device under test is as follows:

[0084] NI's I / O function board card outputs a corresponding single-channel signal according to the requirements of the host computer of its main board card. Connect the signal to the interface adapter box, and then to the heavy-duty cable part of the on-vehicle CTCS3-400T system. The ATP input board collects a high level through internal wiring and transmits this information to the ATP main control board. The ATP main control board transmits the information to NI's CAN communication board card through the CAN communication interface and passes the received information content to NI's main board card for decoding according to the protocol, and judges the correctness of the input signal content of the on-vehicle equipment.

[0085] In this process, a closed node is generated through NI's I / O function board card, and the heavy-duty cable part of the device under test outputs the collected node through the CAN bus; a 60V voltage needs to be provided to the closed node. The host computer judges the driven point (through the Figure 4 driving circuit of the I / O function board card shown) and the collected point (through the Figure 3 signal acquisition circuit of the I / O interface shown) to judge whether the IO acquisition function is normal.

[0086] The operation method is as follows:

[0087] Connect the heavy-duty cable of the device under test and connect the CAN bus;

[0088] The host computer judges the status of the ATP device through the CAN channel. After the host computer judges that the ATP device is running normally, it realizes communication with the ATP device;

[0089] On the host computer through the operation interface, control the driving circuit of NI's I / O function board card to output a DC60V voltage that needs to be provided to the node;

[0090] After the on-vehicle equipment ATP acquisition board card collects the node, it communicates with the ATP device through the CAN;

[0091] In the host computer, judge whether the acquisition input function of the IO function board card is normal by judging whether the driven point and the collected point are equal.

[0092] NI's CAN communication board outputs a single-channel CAN signal according to the requirements of the host computer, transmits it to the on-vehicle ATP main control board through the CAN interface. The ATP main control board controls the output board to output a single-channel high level through the software protocol. After NI's IO function board card collects this high level, it compares the point position of the information with the content required by the CAN signal of the initial NI's CAN communication board card through the software protocol, so as to judge the correctness of the output signal content of the on-vehicle equipment.

[0093] During this test, NI generates a closed node through the CAN driver for ATP. The I / O function board of NI collects this node and outputs the node status. A 24V voltage needs to be provided to the node. In the host computer, it is judged whether the IO drive function is normal by determining whether the driven bit is equal to the collected bit.

[0094] Operation method:

[0095] Connect the X1 heavy-duty cable and connect to the CAN0 channel.

[0096] The host computer judges the status of the ATP device through the CAN channel. After the host computer judges that the ATP is running normally, it realizes communication with the ATP;

[0097] In the host computer through the operation interface, NI generates a closed node through the CAN driver for ATP, and controls that a DC24V voltage needs to be provided to the node;

[0098] After the I / O function board of NI collects the node, it communicates with the ATP;

[0099] In the host computer, it is judged whether the IO acquisition function is normal by determining whether the driven point and the collected point are equal.

[0100] The test process of the CAN communication of the device under test is as follows:

[0101] There are multiple CAN channels in the on-vehicle CTCS3-400T system of the device under test, and the test process of each CAN channel is the same. Taking three channels as an example, in this embodiment, CAN0 and CAN2 are used for the CAN communication of the BTM (Balise Transmission Module, which is one of the key devices of the on-vehicle equipment of the EMU), and CAN1 is reserved. The data packet is sent to the ATP communication board of the device under test through the CAN communication board of NI via the CAN bus, and the ATP then transmits the received data back through the CAN bus. It is judged whether the CAN communication function is normal by observing the response time and decoding accuracy rate in the host computer.

[0102] CAN0 test operation process:

[0103] Connect the X1 heavy-duty cable and connect to the CAN0 channel;

[0104] The host computer judges the status of the ATP device through the CAN0 channel. After the host computer judges that the ATP device is running normally, it communicates with the ATP device;

[0105] In the host computer through the operation interface, click the CAN0 test in the host computer, and observe that the CAN cycle communication status in the host computer is lit, the decoding accuracy rate is within 90%, and the response time after sending a single frame is within 1ms, indicating that the CAN0 channel communication is normal;

[0106] CAN1 test operation process:

[0107] Connect the X1 heavy-duty cable, and connect the CAN0 channel and the CAN1 channel;

[0108] The host computer judges the status of the ATP device through the CAN0 channel. After the host computer judges that the ATP device is running normally, it communicates with the ATP device;

[0109] On the host computer through the operation interface, click CAN1 test in the host computer. The CAN cycle communication status in the left system of the human-machine interface of the host computer lights up. The decoding accuracy rate is within 90%. After sending a single frame, the response time of the I system is within 1ms, indicating that the CAN1 communication of communication board 1 is normal;

[0110] CAN2 test operation process:

[0111] Connect the X1 heavy-duty cable, and connect the CAN0 channel and the CAN2 channel;

[0112] The host computer judges the status of the ATP device through the CAN0 channel. After the host computer judges that the ATP device is running normally, it communicates with the ATP;

[0113] On the host computer through the operation interface, click CAN2 test in the host computer, observe that the CAN cycle communication status in the host computer lights up. The decoding accuracy rate is within 90%. After sending a single frame, the response time is within 1ms, indicating that the CAN2 communication is normal.

[0114] The test process of the RS422 communication of the device under test is as follows:

[0115] As Figure 6 shown, it is the RS422 communication test flow chart in the present invention.

[0116] The RS422 test includes RS422 four-wire system (TCR) and RS422 two-wire system (radar). Among them, the RS422 four-wire system (TCR) interface is ATP X6 and X7, and data is transmitted and received through the RS422 communication board card of NI; the RS422 two-wire system (radar) interface is ATPX5, and the data is sent to the ATP device through CAN0. The ATP device sends the received data to the RS422 communication board card of NI through RS422, and judges whether the RS422 communication is normal through the RS422 communication status and decoding accuracy rate.

[0117] The actual test method of the four-wire system of RS422 communication and the TCR part:

[0118] At the ATP end, connect the serial communication cable X6 and X7 to the interface board, and connect the RS422-4 wires to the front interface of the interface adapter box;

[0119] The host computer determines the status of the ATP device through the CAN0 channel. After determining that the ATP device is running normally, it communicates with the ATP device. On the operation interface of the host computer, click the RS422 test in the host computer to observe the data reception and transmission through RS422 in the host computer;

[0120] Start the RS422 four-wire system (TCR) test, and observe the RS422 communication status and decoding accuracy rate (>90%) to determine whether the RS422 communication is normal.

[0121] RS422 two-wire communication test method:

[0122] At the ATP end, connect the RS422 communication cable X5 to the interface board, connect the heavy-duty connector to X2, and connect the interface in the interface adapter box to the RS422-4 wire;

[0123] The host computer determines the status of the ATP device through the CAN0 channel. After determining that the ATP device is running normally, it communicates with the ATP device. On the operation interface of the host computer, click the RS422 test to observe the data reception and transmission through RS422 in the host computer;

[0124] Start the RS422-4 wire test, and observe the RS422 communication status and decoding accuracy rate (>90%) to determine whether the RS422 communication is normal.

[0125] The test process of the MVB communication of the device under test is as follows:

[0126] Test the MVB communication functions of the left and right communication interfaces respectively. The test platform sends data packets to the ATP device through the MVB communication board card of NI, and the ATP device sends the data back and forwards it. Observe the data accuracy rate (>90%) to determine whether the MVB is normal.

[0127] Operation process:

[0128] At the ATP end, connect X8 and X9 to the interface board, connect the heavy-duty connector to X2, and connect the MVB wire to the front interface of the adapter box;

[0129] The host computer determines the status of the ATP device through the CAN0 channel. After the ATP device is normal, it communicates with the ATP device. On the operation interface of the host computer, click the MVB test to realize data reception and transmission through the MVB communication board card;

[0130] Observe the MVB communication status and decoding accuracy rate (>90%) to determine whether the MVB communication is normal and complete the test.

[0131] Such as Figure 8As shown, it is the flow chart of the system integrity test. The system integrity test process of the device under test is as follows:

[0132] The platform layer of the ATP device addresses each bus position by itself, confirms the working status of each board, and sends it out through the CAN bus;

[0133] At the ATP device end, connect X12 to the interface board and X2 to the heavy-duty connector;

[0134] The host computer judges the status of the ATP device through the CAN0 channel. After the ATP device runs normally, the host computer communicates with the ATP device;

[0135] On the host computer, click the CAN2 status query through the operation interface, confirm that the status lights of each board are lit, and finally judge the integrity of the system.

[0136] As Figures 9A - 9B shown, in the present invention, the adapter box main body 1 is connected to the test device through the adapter box mounting bracket 2. The main part of the adapter box mounting bracket 2 is installed outside the test device interface 203 (i.e., Figure 1 the test platform host interface in), and the adapter box mounting bracket 2 further includes a support plate 201 and a positioning and locking device provided on the front side of the main part. A slideway 202 is provided on the support plate 201; a plurality of rollers are provided at the bottom of the adapter box main body 1, and the plurality of rollers are rotatably installed on the slideway 202. The socket of the adapter box main body 1 is inserted into the test device interface 203 and fixed by the positioning and locking device.

[0137] The interface adapter box includes an adapter box main body 1 and an adapter box mounting bracket 2. The adapter box mounting bracket 2 is fixedly installed outside the test device interface 203. The adapter box mounting bracket 2 has a support plate 201 and a positioning and locking device. The support plate 201 is installed on the operation table surface, and a slideway 202 is provided thereon. The adapter box main body is rotatably installed on the slideway 202 through a plurality of rollers provided at its bottom; the rear interface 103 of the adapter box of the adapter box main body is inserted into the test device interface 203 and locked by the positioning and locking device, and the front interface 104 of the adapter box is inserted into the vehicle-mounted device interface layer of the device under test through a cable.

[0138] In this embodiment, the support plate 201 is fixedly installed on the operation table surface and is connected to the main body of the adapter box mounting bracket 2. The adapter box main body 1 can slide back and forth on the slideway 202 of the support plate 201. The rear interface 103 of the adapter box of the adapter box main body 1 and the test device interface 203 of the adapter box mounting bracket 2 are opposite surfaces, and various sockets or plugs are respectively provided. When designing, the positions and sizes of the corresponding sockets or plugs are strictly matched. The side of the adapter box main body 1 opposite to the adapter box mounting bracket 2 is the front interface 104 of the adapter box, which is respectively connected to the corresponding cables of the device under test.

[0139] The positioning and locking device in the present invention includes first and second bumps 101-102, first and second locking hooks 204-205, a longitudinally telescopic link 207, and a rotating plate 206. The first and second bumps 101-102 are fixedly arranged on the side wall of the adapter box 1. The first and second locking hooks 204-205 are installed on the longitudinally telescopic link 207, and their installation heights are respectively adapted to the first and second bumps 101-102. The longitudinally telescopic link 207 is arranged on the side of the main body part of the adapter box mounting frame 2. The rotating plate 206 is rotatably arranged on the side of the adapter box mounting frame 2. The top block 206A (as Figure 13 shown) on the rotating plate 206 abuts against one of the first and second locking hooks 204-205. In this embodiment, the rotating plate 206 is rotatably installed on the side wall of the adapter box mounting frame 2, and the top block 206A only interacts with the first locking hook 204. The rotating plate 206 has only two stable positions (the rotating structure can refer to the rotating structure of a two-position switch in the prior art), one is the locking position and the other is the release position. When in the locking position, the top block 206A lifts the first locking hook 204; when in the release position, the top block 206A is away from the first locking hook 204. The two stable positions of the rotating plate 206 differ by 90 degrees. When switching between the locking position and the release position, the rotating plate 206 can be rotated by 90 degrees.

[0140] As Figures 11 - 12 shown, there are two groups of the first and second bumps 101-102, the first and second locking hooks 204-205, and the longitudinally telescopic link 207 in the positioning and locking device. The two groups of the first and second bumps 101-102 are respectively arranged on the opposite side walls of the main body of the adapter box 1. The two groups of the first and second locking hooks 204-205 and the longitudinally telescopic link 207 are respectively arranged on the two sides of the main body part of the adapter box mounting frame 2. A transverse linkage rod 208 is fixedly installed between the two longitudinally telescopic links 207. In this embodiment, the longitudinally telescopic link 207 adopts a sleeve structure. The inner tube (equivalent to the moving end, the thin tube) of the sleeve structure is placed inside the outer tube (equivalent to the static end, the thick tube), and the end between the inner tube and the outer tube is connected by an elastic member. The outer end of the inner tube (the part exposed outside the outer tube) is fixedly connected with the first and second locking hooks 204-205. The transverse linkage rod 208 is connected between the two inner tubes.

[0141] In this embodiment, two sets of positioning and locking devices are arranged on both sides of the main body 1 of the adapter box and the main body part of the adapter box mounting bracket 2. The first to second bumps 101 to 102 are respectively arranged at two upper and lower positions of the main body 1 of the adapter box, and the first to second locking hooks 204 to 205 are respectively arranged at two upper and lower positions of the main body part of the adapter box mounting bracket 2. The first bump 101 cooperates with the first locking hook 204, and the second bump 102 cooperates with the second locking hook 205. The first to second locking hooks 204 to 205 on the same side are arranged on the same longitudinally telescopic link 207, and the two longitudinally telescopic links 207 are connected by a transverse linkage rod 208. As long as the top block 206A touches any one of the locking hooks, the other locking hooks can be linked. The main body 1 of the adapter box and the adapter box mounting bracket 2 are locked by the two sets of first to second locking hooks 204 to 205, so that the adapter box rear interface 103 and the test equipment interface 203 on the opposite surfaces are effectively inserted.

[0142] The openings of the first to second locking hooks 204 to 205 are upward and are in the shape of a wedge with a wider upper part and a narrower lower part. Since in this embodiment, the first to second locking hooks 204 to 205 are respectively arranged below the first to second bumps 101 to 102, the first bump 101 enters from the upper opening of the first locking hook 204, and the second bump 102 enters from the upper opening of the second locking hook 205. Also, because the opening is in the shape of a wedge with a wider upper part and a narrower lower part, it is easy for each bump to enter the locking hook. When the locking hook is lifted upward by the top block 206A and the corresponding bump enters the locking hook (the main body 1 of the adapter box is always on the pallet 201 and does not leave the track), under the combined action of the self-weight of the main body 1 of the adapter box, the horizontal component of the clamping force is directed towards the adapter box mounting bracket 2, locking the main body 1 of the adapter box and the adapter box mounting bracket 2 to each other, as Figures 14 - 15 shown.

[0143] A limit block 209 is arranged at a position corresponding to above one of the locking hooks on the adapter box mounting bracket 2. In this embodiment, the limit block 209 is arranged above one of the second locking hooks 205. When the main body 1 of the adapter box moves, one of the second bumps 102 can just enter the space between the limit block 209 and one of the second locking hooks 205, ensuring that the adapter box rear interface 103 is aligned with the test equipment interface 203 in the height direction.

[0144] The rotating plate 206 has two stable positions corresponding to the locked state and the released state respectively. The top block 206A is a protrusion of the rotating plate 206. When the rotating plate 206 rotates to the locked position, the top block 206A just lifts and locks the first bump 101. One end of the top block 206A can be sleeved with an operating rod, which is labor-saving during the rotation operation.

[0145] Between the rear interface 103 of the adapter box body 1 and the test equipment interface 203, and between the front interface 104 of the adapter box and the in-vehicle equipment interface layer of the device under test, each connection part adopts a convex-groove quick plug-in structure. The convex-groove quick plug-in structure is as shown in Figures 16 - 17 shown. It is only a schematic illustration. The sizes and shapes of the connection heads of each interface are different, but the adopted convex-groove quick plug-in structures are roughly the same, ensuring that when plugging and unplugging operations are performed, the guiding cable plug and socket can be quickly plugged in without error, and it can also play a role in limiting and clamping.

[0146] During operation, connect the signals required for testing to the corresponding interfaces of the interface adapter box, and then connect the signals to the heavy-duty cable part of the device under test through a communication cable at the other end of the interface adapter box. Specifically:

[0147] The adapter box body 1 is movably installed on the slideway of the adapter box mounting frame 2, and connect the signals with the same communication protocol as the test item of the device under test to the front interface of the adapter box body 1;

[0148] Push the adapter box body 1 in the direction of the adapter box mounting frame 2 until it is docked with the test equipment interface on the adapter box mounting frame. At this time, the convex block on the adapter box body 1 is exactly above the locking hook of the adapter box mounting frame (in this embodiment, the first convex block 101 is above the first locking hook 204, and the second convex block 102 is above the second locking hook 205, as shown in Figure 10 shown);

[0149] Pull the rotating plate 206 on the adapter box mounting frame 2 (rotate 90 degrees clockwise and fix it in this embodiment), and the top block 206A on it will lift the first locking hook 204 (at this time, the elastic member at the end of the inner tube of the longitudinally telescopic link 207 is compressed), locking the adapter box body and the adapter box mounting frame, which also means that the rear interface 103 of the adapter box is tightly plugged with the test equipment interface 203, realizing a reliable connection of signals.

[0150] After the test is completed, pull the rotating plate 206 on the adapter box mounting frame 2 to rotate in the reverse direction to the release position. The longitudinally telescopic link 207 descends to its original position under the restoring force of the elastic member, and then push the first convex block 101 or the second convex block 102 on the adapter box body 1 in the reverse direction to separate the adapter box body 1 from the adapter box mounting frame 2, and one operation is completed.

[0151] Inside the interface adapter box are all connecting cables. The front interface 104 of the adapter box uses aviation sockets of different specifications and models, and is quickly plugged with the interface on the cabinet of the device under test through an aviation plug; both the rear interface 103 of the adapter box and the test device interface 203 adopt a plurality of connector structures, and the corresponding connectors are directly plugged. The multiple aviation sockets of the front interface 104 of the adapter box and the multiple connectors of the rear interface 103 of the adapter box are electrically connected through the corresponding connecting cables configured inside the interface adapter box.

[0152] Through the positioning and locking device and the limit block, the present invention makes the connection between the adapter box main body 1 and the socket or plug of the adapter box mounting frame 2 very tight, eliminates signal interference caused by human factors, realizes overall plugging and unplugging, can correspond to multiple boards at the same time, avoids plugging errors, is convenient and fast to operate, and ensures the integrity of the test.

[0153] During the connection process between the interface adapter box and the board, the present invention adds the design of convex and concave grooves, and also adds the structure and method of quick connection. At the same time, the interface adapter box also adds an interface for introducing external power to provide power for the device under test. The method of the present invention builds a general test platform, and more interfaces can be inserted on this test platform to shorten the wire-changing time.

Claims

1. A testing method for high-speed railway vehicle-mounted equipment, where the equipment to be tested is the on-vehicle CTCS3-400T system, which includes an ATP main control board, an ATP communication board, an ATP output board, an ATO board, a BTM unit, and a TCR host; the testing equipment is the NI instrument hardware platform, which includes an IO function board card, a pulse function board card, an MVB communication board card, a CAN communication board card, an RS422 communication board card, and a main board card; it is characterized in that: The test equipment realizes communication and testing of the equipment under test through the interface adapter box and cables. The steps are as follows: The NI instrument hardware platform simulates signals with the same communication protocol as the item under test of the equipment under test through a board card corresponding to the item under test; Connect the above signals to the corresponding interfaces of the interface adapter box, and then connect the signals to the heavy-duty cable part of the equipment under test through the other end of the interface adapter box via a cable; Utilize the internal wiring of the equipment under test to connect to the corresponding board card interfaces inside the equipment under test, and transfer the corresponding signals to the corresponding board cards in the equipment under test; The corresponding board cards of the equipment under test analyze the signals, and transfer the analyzed signals to the ATP main control board for analysis. The ATP main control board then returns the analyzed information to the corresponding board card of the NI instrument hardware platform via the ATP communication board according to the communication protocol; After the corresponding board card of the NI instrument hardware platform receives the returned information, it transfers the returned information to the host board card of the NI instrument hardware platform for accuracy judgment, so as to obtain the correctness of the item under test; Connect the above signals to the corresponding interfaces of the interface adapter box, and then connect the signals to the heavy-duty cable part of the equipment under test through the other end of the interface adapter box via a cable. Specifically: The adapter box body of the interface adapter box is rollingly installed on the slideway of the adapter box mounting rack, and connect signals with the same communication protocol as the item under test of the equipment under test to the front interfaces of the interface adapter box; Push the adapter box body towards the test equipment until the rear interface of the adapter box body docks with the test equipment interface inside the adapter box mounting rack; Lock the adapter box body and the adapter box mounting rack through the positioning and locking device to achieve reliable signal connection; The positioning and locking device has first and second bumps, first and second locking hooks, a longitudinally telescopic link, and a rotating plate. The first and second bumps are fixedly arranged on the side walls of the adapter box body, the first and second locking hooks are installed on the longitudinally telescopic link, the installation height of the first locking hook is adapted to the first bump, the installation height of the second locking hook is adapted to the second bump, the longitudinally telescopic link is installed on the front side of the adapter box mounting rack, and the rotating plate is rotatably arranged on the side of the adapter box mounting rack and can be abutted against one of the first and second locking hooks.

2. The high-speed rail vehicle-mounted equipment testing method according to claim 1, wherein: The interface adapter box includes an adapter box body and an adapter box mounting rack. The adapter box mounting rack is fixedly installed outside the interface end of the test equipment. The adapter box mounting rack has a support plate, the support plate is installed on the operating table surface, and a slideway is provided thereon. The adapter box body is rollingly installed on the slideway through a plurality of rollers provided at its bottom; the rear interface of the adapter box of the adapter box body is inserted and locked with the test equipment interface through the positioning and locking device, and the front interface of the adapter box is inserted and connected with the vehicle-mounted equipment interface layer of the equipment under test through a cable.

3. The high-speed rail on-vehicle equipment testing method according to claim 1, wherein: In the positioning and locking device, the first and second bumps, the first and second locking hooks, and the longitudinally telescopic link are in two groups. The two groups of first and second bumps are respectively arranged on the side walls on both sides of the adapter box body, and the two groups of first and second locking hooks and longitudinally telescopic links are respectively arranged on both sides of the front side of the adapter box mounting rack. A transverse linkage rod is fixedly installed between the moving ends of the two longitudinally telescopic links.

4. The testing method for high-speed rail on-vehicle equipment according to claim 1 or 3, characterized in that: A limit block is provided on the adapter box mounting rack corresponding to the upper side of the second locking hook.

5. The high-speed rail vehicle-mounted equipment testing method according to claim 1, wherein: The openings of the first and second locking hooks face upward and are wedge-shaped with a wider upper part and a narrower lower part.

6. The high-speed rail vehicle-mounted equipment testing method according to claim 1, wherein: The rotating plate has two stable positions corresponding to the locking state and the release state respectively. A top block that can cooperate with the first locking hook or the second locking hook is provided on the rotating plate, and an operating rod is also provided on the rotating plate.

7. The method for testing high-speed rail on-vehicle equipment according to claim 1, characterized in that: Each connection part between the rear interface of the adapter box of the adapter box body and the test equipment interface, and between the front interface of the adapter box and the in-vehicle equipment interface layer of the equipment under test adopts a convex-groove quick plug-in structure.

8. The testing method for high-speed rail on-vehicle equipment according to claim 1, wherein: The interface adapter box adds an interface for introducing an external power supply.

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