Locomotive signal vehicle-mounted equipment on-board test device

Abstract

The on-board test device for locomotive signal on-board equipment relates to the technical field of locomotive signal testing. It solves the problem that the existing locomotive testing process has high work intensity for testers, and the testers must conduct the test under the vehicle, which has the problems of high work intensity, poor safety and serious influence by environmental factors. The track circuit standard signal output unit of the present invention receives the test trigger control signal sent by the main control unit, and outputs the track circuit standard signal to the locomotive signal on-board equipment to be tested; the on-board equipment output detection unit detects the test result signal of the locomotive signal on-board equipment, and outputs the test result signal to the main control unit; the main control unit sends a test trigger control signal to the track circuit standard signal output unit, and outputs the strain time signal and the judgment result to the test result processing unit; the test result processing unit displays, stores and outputs the received signal through a conversion interface. The present invention is suitable for use in on-board testing of locomotives.

Description

Technical Field

[0001] The invention relates to the technical field of locomotive signal testing. Background Art

[0002] Locomotive signal on-board equipment, including general locomotive signal on-board equipment, track circuit readers, locomotive signal decoding plug-ins, etc., are currently detected using portable code transmitters when they are installed on the vehicle. This operation method has the following disadvantages: it requires two people to operate; the personnel under the vehicle need to crawl under the vehicle, the safety of the operation cannot be guaranteed and the labor intensity is high, especially in bad weather; there is no operation record, and the operation process cannot be effectively controlled; the equipment cannot be tested for parameters such as sensitivity and response time on the vehicle, and it can only be checked whether the host can light up correctly when the signal is large enough. Summary of the invention

[0003] The purpose of the present invention is to solve the problems that the existing locomotive testing process has high workload for testers, and the testers must perform the test under the vehicle, which has high workload intensity, poor safety and serious influence by environmental factors. A locomotive signal vehicle-mounted equipment on-board testing device is proposed.

[0004] The on-board test device for locomotive signal on-board equipment of the present invention comprises a test result processing unit 1, a main control unit 2, a track circuit standard signal output unit 3, an on-board equipment output detection unit 4 and an interface circuit 5;

[0005] The track circuit standard signal output unit 3 is used to receive the test trigger control signal sent by the main control unit 2, and output the track circuit standard signal to the locomotive signal on-board equipment to be tested through the interface circuit 5 according to the test trigger control signal sent by the main control unit 2;

[0006] The on-board equipment output detection unit 4 is used to detect the test result signal of the locomotive signal on-board equipment through the interface circuit 5, and output the detected test result signal to the main control unit 2;

[0007] The main control unit 2 is used to send a test trigger control signal to the track circuit standard signal output unit 3, and at the same time receive the on-board equipment test result signal output by the on-board equipment output detection unit 4, calculate the strain time of the locomotive signal on-board equipment according to the time when the track circuit standard signal is output and the time when the on-board equipment output detection unit 4 detects the on-board equipment test result signal, and judge whether the calculated strain time is greater than the strain time standard value, and then output the obtained strain time signal of the locomotive signal on-board equipment and the judgment result to the test result processing unit 1;

[0008] The test result processing unit 1 is used to receive the host strain time signal and the judgment result output by the main control unit 2, and to display, store and output the received signal through a conversion interface.

[0009] The present invention adopts the method of on-board circuit equipment to realize testing at any time when the locomotive stops, reducing the number of operators, and one person can perform on-board detection operations on the locomotive signal equipment; the operators do not need to drill under the car, which reduces the operation intensity and ensures operation safety; the on-board detection and maintenance of the locomotive signal equipment can be effectively managed and controlled, and the detection process and detection results no longer rely on personnel records, and can be recorded in real time, or transmitted to other equipment by wire, or transmitted to a data server by wireless; there is no need to take the locomotive signal on-board equipment off the car, and the locomotive signal on-board equipment can be tested for sensitivity, strain time and cyclic decoding correctness on the car, which greatly improves the detection efficiency and operation quality of the locomotive signal equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is an electrical principle block diagram of the on-board test device for locomotive signal equipment of the present invention;

[0011] Figure 2 is a circuit diagram of the vehicle-mounted device output detection unit 4;

[0012] Figure 3 This is the pin diagram of the chip model STM32;

[0013] Figure 4 This is the connection diagram between the chip DS12CR887 and the STM32 chip;

[0014] Figure 5 It is a circuit diagram of the track circuit standard signal output unit 3. DETAILED DESCRIPTION

[0015] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve corresponding technical effects can be fully understood and implemented accordingly. The embodiments of the present application and the various features in the embodiments can be combined with each other without conflict, and the technical solutions formed are all within the protection scope of the present invention.

[0016] Specific implementation method 1: The following is combined Figures 1 to 5 The present embodiment is described. The on-board test device for locomotive signal on-board equipment in the present embodiment comprises a test result processing unit 1, a main control unit 2, a track circuit standard signal output unit 3, an on-board equipment output detection unit 4 and an interface circuit 5;

[0017] The track circuit standard signal output unit 3 is used to receive the test trigger control signal sent by the main control unit 2, and output the track circuit standard signal to the locomotive signal on-board equipment to be tested through the interface circuit 5 according to the test trigger control signal sent by the main control unit 2;

[0018] The on-board equipment output detection unit 4 is used to detect the test result signal of the locomotive signal on-board equipment through the interface circuit 5, and output the detected test result signal to the main control unit 2;

[0019] The main control unit 2 is used to send a test trigger control signal to the track circuit standard signal output unit 3, and at the same time receive the on-board equipment test result signal output by the on-board equipment output detection unit 4, calculate the strain time of the locomotive signal on-board equipment according to the time when the track circuit standard signal is output and the time when the on-board equipment output detection unit 4 detects the on-board equipment test result signal, and judge whether the calculated strain time is greater than the strain time standard value, and then output the obtained strain time signal of the locomotive signal on-board equipment and the judgment result to the test result processing unit 1;

[0020] The test result processing unit 1 is used to receive the host strain time signal and the judgment result output by the main control unit 2, and to display, store and output the received signal through a conversion interface.

[0021] This embodiment adopts the method of on-board circuit equipment to achieve that as long as the locomotive stops, the locomotive host can be tested at any time. During the test, it is only necessary to connect the input and output ports of the locomotive host to the corresponding ports of the on-board test device described in the present invention through data cables to perform the test. The locomotive signal on-board equipment outputs a test signal, receives the test result signal output by the on-board host, and displays the output test result, uploads it to the network or the host computer and stores it, so as to facilitate the retrieval and viewing of the test result data when the locomotive fails or is under maintenance, thereby realizing the inspection of the working status of the locomotive host.

[0022] Furthermore, the test result processing unit 1 includes a memory, a data transmission port and a display screen; the memory is used to store the test result signal, the data transmission port is used to upload the test result signal to a host computer or a network server, and the display screen is used to display the test result.

[0023] The memory described in this embodiment is used to store the test results of the test time, which is convenient for subsequent locomotive equipment inspection or data inspection when an accident occurs. At the same time, the data transmission port is used to upload the data to the host computer and the network. When the inspection is carried out, the test result history data can be searched through the network. During the test, the tester can observe the test results through the display screen.

[0024] Further, the test result processing unit 1 includes a memory, a data transmission port and a display screen;

[0025] The memory described in this embodiment is used to store the test result data, the data transmission port is used to upload the test result data to the host computer or network server, and the display screen is used to display the test result.

[0026] Furthermore, the vehicle-mounted device output detection unit 4 is implemented by an optical coupler isolator.

[0027] The circuit of the vehicle-mounted device output detection unit 4 described in this embodiment is as follows: Figure 2 As shown, each signal isolation circuit in the circuit is independent of each other. Figure 2 The pins and numbers of some circuits, and the circuit structure of other parts are Figure 2 The circuit structure is the same, and the numbers are in Table 1. Figure 2 The left lead is used to connect the signal output terminal of the vehicle host under test through the interface unit. The specific signal connection terminals are shown in Table 1. The right lead is used to connect the corresponding signal input terminal of the main control unit 2, which are ZS-F, JYJ-F, SD1-F, SD2-F, SD3-F, LF, LU-F, UF, U2-F, HU-F, UU-F, HF, BF, SX-F, XX-F, and +50V-F. Figure 3 The chips in the table correspond to the pins with the same number;

[0028] An optocoupler is used to isolate the input signal from the system and convert the input high voltage signal (50V DC voltage) into a 3.3V system level to protect the system.

[0029] Table 1 is the correspondence table between signals and labels

[0030]

[0031]

[0032] Furthermore, the memory is implemented using a pluggable memory card.

[0033] The chip structure of the STM32 model described in this embodiment is as follows Figure 3As shown in the figure, FSMC-NBL0, FSMC-NBL1, FSMC-D0 to FSMC-D15, FSMC_NOE, and FSMC_NWE are used to connect the display screen and are the display signal output terminals. The leads labeled ZS-F, JYJ-F, SD1-F, SD2-F, SD3-F, LF, LU-F, UF, U2-F, HU-F, UU-F, HF, BF, SX-F, XX-F, and +50V-F are connected to the leads with corresponding labels in the circuit of the vehicle-mounted equipment output detection unit 4, as shown in FIG. Figure 2 Corresponding numbered leads, FSMC-A0 to FSMC-A9, FSMC-A16 to FSMC-A18 in the figure are used to connect the data storage SRAM chip. In the figure, SPI2-NSS, SPI2-SCK, SPI2-SDO, SPI2-SDI, CH395_INT#, CH395_RDY#, CH395_RstOver, CH395_RSTI are connected to the data transmission port of the test result processing unit 1. In the figure, the pins labeled SDIO-D0, SDIO-D1, SDIO-D2, SDIO-D3 and SDIO-CLK are used to connect the card tray of the pluggable memory card.

[0034] The main control unit described in this embodiment is used to receive the test result signal and send the test result signal to the test result processing unit to test the sensitivity, strain time and return coefficient of the on-board host. During the sensitivity test, the main control unit controls the track circuit standard signal output unit to output signals of different voltages and waits to receive the sensitivity test result signal. The received test result signal with the lowest amplitude is the recognizable lowest voltage signal. During the return coefficient test, starting with the test result signal, the signal output by the signal output unit is gradually reduced until the test result signal is not output. The signal output amplitude at this moment divided by the output signal amplitude during the sensitivity test is the return coefficient.

[0035] During the strain time test, the main control unit accumulates the time from sending the test signal to receiving the test result signal, which is the strain time.

[0036] Furthermore, it also includes a power supply circuit, which is used to supply power to the test result processing unit 1, the main control unit 2, the track circuit standard signal output unit 3 and the on-board equipment output detection unit 4.

[0037] Furthermore, the track circuit standard signal output unit 3 is implemented using a DDS chip.

[0038] The circuit described in this embodiment is as follows Figure 5The circuit adopts a DDS chip to perform phase modulation on the received signal to generate an FSK wave or a sine wave, increases the driving capability of the FSK wave or the sine wave signal through a radio frequency amplifier, and adopts a selector to perform range switching on the generated FSK wave or the sine wave signal. The main control unit controls the selectors RL1-RL4 to select the range, adopts a low range, and adjusts the amplitude of the output signal through AD5260 to test the sensitivity and return coefficient of the device; when a high range is adopted, the strain time of the device is tested.

[0039] Although the embodiments disclosed in the present invention are as above, the above contents are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. The on-board test device for locomotive signal equipment is characterized in that: The device comprises a test result processing unit (1), a main control unit (2), a track circuit standard signal output unit (3), an on-board equipment output detection unit (4) and an interface circuit (5); The track circuit standard signal output unit (3) is used to receive the test trigger control signal sent by the main control unit (2), and output the track circuit standard signal to the locomotive signal on-board equipment to be tested through the interface circuit (5) according to the test trigger control signal sent by the main control unit (2); The on-board equipment output detection unit (4) is used to detect the test result signal of the locomotive signal on-board equipment through the interface circuit (5), and output the detected test result signal to the main control unit (2); The main control unit (2) is used to send a test trigger control signal to the track circuit standard signal output unit (3), and at the same time receive the on-board equipment test result signal output by the on-board equipment output detection unit (4), calculate the strain time of the locomotive signal on-board equipment according to the time when the track circuit standard signal is output and the time when the on-board equipment output detection unit (4) detects the on-board equipment test result signal, and judge whether the calculated strain time is greater than the strain time standard value, and then output the obtained locomotive signal on-board equipment strain time signal and the judgment result to the test result processing unit (1); The test result processing unit (1) is used to receive the host strain time signal and the judgment result output by the main control unit (2), and to display, store and output the received signal through a conversion interface; During the test, the input and output ports of the locomotive host are connected to the corresponding ports of the vehicle test device through a data line for testing. The locomotive signal on-board equipment outputs a test signal, receives the test result signal output by the on-board host, and displays the output test result, uploads it to the network or the host computer and stores it. When the locomotive fails or is under maintenance, the test result data is retrieved and viewed to check the working status of the locomotive host. The track circuit standard signal output unit (3) is implemented by using a DDS chip, which performs phase modulation on the received signal to generate an FSK wave or a sine wave. The driving capability of the FSK wave or the sine wave signal is increased by a radio frequency amplifier, and a selector is used to switch the range of the generated FSK wave or the sine signal. The main control unit controls the selector to select the range. When a low range is used, the amplitude of the output signal is adjusted by AD5260 to test the sensitivity and return coefficient of the equipment. When a high range is used, the strain time of the equipment is tested.

2. The on-board testing device for locomotive signal vehicle-mounted equipment according to claim 1, characterized in that: The test result processing unit (1) comprises a memory, a data transmission port and a display screen; The memory is used to store the test result signal, the data transmission port is used to upload the test result signal to the host computer or the network server, and the display screen is used to display the test result.

3. The on-board testing device for locomotive signal vehicle-mounted equipment according to claim 1 or 2, characterized in that: The vehicle-mounted device output detection unit (4) is implemented using an optical coupler isolator.

4. The on-board testing device for locomotive signal vehicle-mounted equipment according to claim 2, characterized in that: The memory is implemented using a pluggable memory card.

5. The on-board testing device for locomotive signal vehicle-mounted equipment according to claim 1, characterized in that: It also comprises a power supply circuit, which is used to supply power to the test result processing unit (1), the main control unit (2), the track circuit standard signal output unit (3) and the on-board equipment output detection unit (4).

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