Fault diagnosis method and device

Abstract

The present application discloses a fault judgment method and device, which includes: generating a track circuit signal according to a test instruction and processing the generated track circuit signal; sending the processed track circuit signal to a TCR device through a track circuit antenna loop; wherein the TCR device is configured to decode the processed track circuit signal; receiving information sent by the TCR device; judging whether the track circuit antenna loop or the TCR device is faulty according to the received information. The method and device can conveniently and accurately test rail transit signal equipment, thereby improving the safety of the railway system.

Description

Technical Field

[0001] The present application relates to the field of rail transit signals, and in particular to a fault judgment method and device. Background Art

[0002] During the operation of high-speed trains, the device that collects information on the track is called a TCR (Train Circuit Recorder). The TCR device is part of the onboard equipment of the train control system. It is responsible for receiving and demodulating the track circuit signal (hereinafter referred to as decoding) to determine the distance and position relationship between the train and the preceding train.

[0003] However, on the one hand, the track circuit signal is susceptible to interference in the railway system, resulting in low signal amplitude, making it impossible for the TCR device to decode; on the other hand, the decoding hardware function of the TCR device fails, making it impossible for the TCR device to decode.

[0004] The inability of TCR equipment to decode will cause a parking failure and cause train delays. Summary of the invention

[0005] The present application provides a fault diagnosis method and device, which can conveniently and accurately test rail transit signal equipment, thereby improving the safety of the railway system.

[0006] The present application provides a fault judgment method, comprising: generating a track circuit signal according to a test instruction and processing the generated track circuit signal; sending the processed track circuit signal to a TCR device through a track circuit antenna loop; wherein the TCR device is configured to decode the processed track circuit signal; receiving information sent by the TCR device; and judging whether the track circuit antenna loop or the TCR device is faulty according to the received information.

[0007] In an exemplary embodiment, generating a track circuit signal according to a test instruction includes:

[0008] If the test instruction includes parameters of the track circuit signal, generating the track circuit signal according to the parameters of the track circuit signal;

[0009] If the test instruction does not include the parameters of the track circuit signal, the track circuit signal is generated according to the preset parameters of the track circuit signal.

[0010] In an exemplary embodiment, before receiving the information sent by the TCR device, the method includes:

[0011] A handshake signal is sent to the TCR device.

[0012] In an exemplary embodiment, the step of determining whether the track circuit antenna loop or the TCR device is faulty according to the received information includes:

[0013] If the received information indicates that the handshake with the TCR device is unsuccessful, determining that the TCR device is faulty;

[0014] If the received information indicates that the TCR device has not received a track circuit signal, it is determined that the track circuit antenna loop is faulty;

[0015] If the received information indicates that the TCR device has received part of the track circuit signal, it is determined that the TCR device is faulty or the track circuit antenna loop is faulty;

[0016] If the received information indicates that the parameters for generating the track circuit signal and the parameters for the decoded signal are different, it is determined that the TCR device is faulty.

[0017] In an exemplary embodiment, the processing of the generated track circuit signal includes:

[0018] The generated track circuit signal is amplified, filtered, and constant current controlled.

[0019] In an exemplary embodiment, amplifying, filtering, and controlling the constant current of the generated track circuit signal includes:

[0020] The generated track circuit signal is amplified, low-pass filtered and high-pass filtered;

[0021] The track circuit signal after amplification, low-pass filtering and high-pass filtering is scaled down, and the scaled-down signal is used as a control signal, and the control signal is used to control the track circuit signal after amplification, low-pass filtering and high-pass filtering to output a constant current.

[0022] In an exemplary embodiment, the result of determining whether the track circuit antenna loop or the TCR device is faulty may be sent to a host computer.

[0023] The present application provides a fault diagnosis device, comprising:

[0024] It includes a signal processing module and a communication interface module;

[0025] The signal processing module is configured to receive a test instruction from the communication interface module, generate a track circuit signal according to the test instruction and process the generated track circuit signal; send the processed track circuit signal to the TCR device through the track circuit antenna loop; receive information sent by the TCR device from the communication interface module; and determine whether the track circuit antenna loop or the TCR device is faulty according to the received information;

[0026] The communication interface module is configured to receive test instructions from a host computer and receive information sent by the TCR device.

[0027] In an exemplary embodiment, the step of determining whether the track circuit antenna loop or the TCR device is faulty according to the received information includes:

[0028] If the received information indicates that the handshake with the TCR device is unsuccessful, determining that the TCR device is faulty;

[0029] If the received information indicates that the TCR device has not received a track circuit signal, it is determined that the track circuit antenna loop is faulty;

[0030] If the received information indicates that the TCR device has received part of the track circuit signal, it is determined that the TCR device is faulty or the track circuit antenna loop is faulty;

[0031] If the received information indicates that the parameters for generating the track circuit signal and the parameters for the decoded signal are different, it is determined that the TCR device is faulty.

[0032] In an exemplary embodiment, processing the generated track circuit signal includes:

[0033] Amplify, filter and control the constant current of the generated track circuit signal;

[0034] Wherein, the amplifying, filtering, and constant current controlling of the generated track circuit signal includes:

[0035] The generated track circuit signal is amplified, low-pass filtered and high-pass filtered;

[0036] The track circuit signal after amplification, low-pass filtering and high-pass filtering is scaled down, and the scaled-down signal is used as a control signal. Under the action of the control signal, the track circuit signal after amplification, low-pass filtering and high-pass filtering is converted into a constant current signal.

[0037] This application includes the following advantages:

[0038] At least one embodiment of the present application can conveniently and accurately test rail transit signal equipment, thereby improving the safety of the railway system.

[0039] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by implementing the present application. Other advantages of the present application can be realized and obtained by the schemes described in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0041] Figure 1 A flowchart of a fault judgment method according to an embodiment of the present application;

[0042] Figure 2 A schematic diagram of a fault judgment device according to an embodiment of the present application;

[0043] Figure 3 A schematic diagram of a fault diagnosis system according to an embodiment of the present application;

[0044] Figure 4 A schematic diagram of a signal processing circuit according to an embodiment of the present application;

[0045] Figure 5 Schematic diagram of a signal processing circuit according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] Figure 1 is a flow chart of a fault judgment method according to an embodiment of the present application, such as Figure 1 As shown, the fault judgment method of this embodiment includes steps S11-S13:

[0047] S11, generating a track circuit signal according to the test instruction and processing the generated track circuit signal;

[0048] S12, sending the processed track circuit signal to the TCR device through the track circuit antenna loop;

[0049] S13, receiving information sent by the TCR device; judging whether the track circuit antenna loop or the TCR device is faulty according to the received information;

[0050] In an exemplary embodiment, generating a track circuit signal according to a test instruction includes:

[0051] If the test instruction includes parameters of the track circuit signal, generating the track circuit signal according to the parameters of the track circuit signal;

[0052] If the test instruction does not include the parameters of the track circuit signal, the track circuit signal is generated according to the preset parameters of the track circuit signal.

[0053] In an exemplary embodiment, before receiving the information sent by the TCR device, the method includes:

[0054] A handshake signal is sent to the TCR device.

[0055] In an exemplary embodiment, determining whether the track circuit antenna loop or the TCR device is faulty according to the received information includes:

[0056] If the received information indicates that the handshake with the TCR device is unsuccessful, it is determined that the TCR device is faulty;

[0057] If the received information indicates that the TCR device has not received the track circuit signal, it is determined that the track circuit antenna loop is faulty;

[0058] If the received information indicates that the TCR device has received a partial track circuit signal, it is determined that the TCR device is faulty or the track circuit antenna loop is faulty;

[0059] If the received information indicates that the parameters of the generated track circuit signal and the parameters of the decoded signal are different, it is determined that the TCR device is faulty.

[0060] In an exemplary embodiment, processing the generated track circuit signal includes:

[0061] Amplifying, filtering, and constant current controlling the generated track circuit signal;

[0062] Among them, amplifying, filtering, and constant current controlling the generated track circuit signal includes:

[0063] Amplifying, low-pass filtering, and high-pass filtering the generated track circuit signal;

[0064] Scaling down the track circuit signal that has been amplified, low-pass filtered, and high-pass filtered, using the scaled-down signal as a control signal, and under the action of the control signal, converting the track circuit signal that has been amplified, low-pass filtered, and high-pass filtered into a constant current signal.

[0065] Here, scaling down means that the input voltage and the output voltage are in a direct proportional relationship. For example:

[0066] U0 = K × Ui;

[0067] K is a proportionality coefficient. Then, when 0 < K < 1, it is called scaling down.

[0068] In the embodiment of the present application, a track circuit signal is generated, and the generated track circuit signal is sent to the track circuit antenna. The track circuit antenna sends the track circuit signal to the TCR device and receives the information sent by the TCR device; whether the track circuit antenna loop or the TCR device is faulty is determined according to the received information.

[0069] Figure 2is a schematic diagram of a fault judgment device according to an embodiment of the present application, such as Figure 2 As shown, the fault judgment device includes:

[0070] It includes a signal processing module and a communication interface module;

[0071] The signal processing module is configured to receive a test instruction from the communication interface module, generate a track circuit signal according to the test instruction and process the generated track circuit signal; send the processed track circuit signal to the TCR device through the track circuit antenna loop; receive information sent by the TCR device from the communication interface module; and determine whether the track circuit antenna loop or the TCR device is faulty according to the received information;

[0072] The communication interface module is configured to receive a test instruction from a host computer and receive information sent by the TCR device.

[0073] In an exemplary embodiment, the step of determining whether the track circuit antenna loop or the TCR device is faulty according to the received information includes:

[0074] If the received information indicates that the handshake with the TCR device is unsuccessful, determining that the TCR device is faulty;

[0075] If the received information indicates that the TCR device has not received a track circuit signal, it is determined that the track circuit antenna loop is faulty;

[0076] If the received information indicates that the TCR device has received part of the track circuit signal, it is determined that the TCR device is faulty or the track circuit antenna loop is faulty;

[0077] If the received information indicates that the parameters for generating the track circuit signal and the parameters for the decoded signal are different, it is determined that the TCR device is faulty.

[0078] In an exemplary embodiment, the generated track circuit signal is processed, including: amplifying, filtering, and constant current controlling the generated track circuit signal.

[0079] In an exemplary embodiment, amplifying, filtering, and controlling the constant current of the generated track circuit signal includes:

[0080] The generated track circuit signal is amplified, low-pass filtered and high-pass filtered;

[0081] The track circuit signal after amplification, low-pass filtering and high-pass filtering is scaled down, and the scaled-down signal is used as a control signal. Under the action of the control signal, the track circuit signal after amplification, low-pass filtering and high-pass filtering is converted into a constant current signal.

[0082] In an exemplary embodiment, the signal processing module may include a digital signal processing module and an analog signal processing module.

[0083] In an exemplary embodiment, the analog signal processing module may include a DDS, a filtering circuit, and a signal processing circuit.

[0084] In an exemplary embodiment, the track circuit signal may be generated by DDS.

[0085] In an exemplary embodiment, the digital signal processing module may include a DSP and an FPGA.

[0086] In an exemplary embodiment, the communication interface module may include a first interface circuit and a second interface circuit. The first interface circuit may adopt a DI / DO422 communication mode, and the second interface circuit may adopt a 232 communication mode.

[0087] This test device supports the selection and sending function of three frequency shift modes on site, namely ZPW2000, UM71, and domestic frequency shift.

[0088] The apparatus of the embodiment of the present application generates a track circuit signal and sends the generated track circuit signal to the track circuit antenna. The track circuit antenna sends the track circuit signal to the TCR device and receives the information sent by the TCR device. It determines whether the track circuit antenna loop or the TCR device is faulty based on the received information.

[0089] Figure 3 is a schematic diagram of a fault diagnosis system according to an embodiment of the present application, such as Figure 3 As shown, the system is an example of a fault diagnosis system.

[0090] The system includes a TCR test board, a TCR device, a PC and a track circuit antenna.

[0091] Among them, the TCR test board is an example of the above-mentioned fault judgment device, which is composed of an analog signal processing module, a digital signal processing module, and a communication interface module.

[0092] The communication interface module is used to adapt the device to communicate with a computer or other test system and receive signal generation control instructions and parameters; the digital signal processing module selects signal channels, controls the output timing of signal channels, sets the parameters of each output signal, executes some complex signal generation algorithms, etc. according to the received control instructions, and controls the signal generation module (i.e. Figure 3 The DDS in the circuit generates the required signal; the analog signal processing module circuit can generate the track circuit signal through the DDS (direct digital frequency synthesizer) after filtering and signal processing circuit.

[0093] The communication module is used to adapt the device to communicate with a computer or other test system and receive control instructions and parameters from the upper layer. The communication module uses a specific standard board-level bus interface to connect to the main control module on the inside of the system, such as SPI interface, IIC interface, parallel interface, serial interface, etc. This case uses the UART interface to implement. The communication module is connected to an external computer or test system through a specific standard communication interface on the outside of the system, such as Ethernet interface, USB interface, RS232 interface, RS485 interface, CAN interface and other commonly used industrial interfaces. This case uses RS232 interface and RS422 interface to implement.

[0094] The main control module of the digital signal processing module (i.e. Figure 3 The DSP in the communication module selects signal channels, controls the output timing of signal channels, sets parameters of output signals, switches scenes of complex signals, and controls the order of sending track signal codes after scene switching, etc., according to the control instructions received from the communication module, and controls the signal generating module to generate the required track circuit signals.

[0095] Among them, signal channel selection means: if no host computer command is received within 2 seconds, the automatic test scene will be entered; if a host computer command is received, the waveform test will be sent according to the host computer command. The scene definition is as follows:

[0096] (1) Automatic test scenario: The test module performs tests in a fixed code transmission sequence, traversing the four carrier frequencies and 16 low-frequency information (except 25.7 Hz and 27.9 Hz) under the UM71 standard, and switches the code transmission every 2.5 seconds.

[0097] (2) Host computer customized scenario: The test module sends codes according to the carrier frequency and low frequency specified by the host computer. If the host computer selects no carrier frequency or no low frequency, no code is sent.

[0098] (3) Host computer preset scenario: The test module sends codes according to the standard specified by the host computer, and switches to send codes every 2.5 seconds. Among them, the UM71 standard traverses 4 carrier frequencies and 16 low-frequency information (except 25.7Hz and 27.9Hz); the ZPW2000 standard traverses 8 carrier frequencies and 16 low-frequency information (except 25.7Hz and 27.9Hz); the domestic frequency shift standard traverses 4 carrier frequencies and 14 low-frequency information (except 7Hz, 8Hz, 9Hz, and 22.5Hz); the code is switched every 2.5 seconds. In this mode, the standard is the main judgment condition, and unknown standards do not send codes.

[0099] The TCR device in this system can be a main system or a standby system. The test board needs to establish handshake signals with the main system and the standby system respectively, and then transmit data. The data includes the current low frequency information and carrier frequency information obtained from the TCR device.

[0100] The FPGA in the test board performs timing control according to the SPI signal sent by CPU1, so that the track information is sent first and then the information sent by the TCR device is received. The DSP contains the track circuit signal parameters, and some bytes in the parameters are carrier frequency information and low frequency information. The information decoded by the TCR unit also contains carrier frequency information and low frequency information. The carrier frequency information and low frequency information are separated by FPGA, and the set value is compared with the received value, and the comparison result is transmitted to the host computer or user. The host computer can accept the two states of consistent or inconsistent information uploaded by DSP.

[0101] The parameters of the output signal include: DDS control signal and FSK real signal data. The string is sent to DDS in SPI form for operation.

[0102] Carrier frequency information refers to: the orbital system information currently used in my country, specifically meaning uplink and downlink.

[0103] Low-frequency information refers to the period of the FSK signal, which specifically means the color light information, that is, the position distance information between the preceding vehicles.

[0104] The method of controlling the period of the FSK signal to change the corresponding color light information is called the mixing method.

[0105] The fault judgment logic is as follows:

[0106] The master DSP first waits for 2 seconds for the handshake signal of the TCR device to be established, and then reads the register handshake status every 1 second. If the handshake fails for 3 consecutive seconds, the ERR light turns on and the RUN light goes off, which means the TCR host is faulty.

[0107] If after the handshake signal is established, the decoding boards A and B in the TCR system do not receive the host decoding information, it can be determined that the antenna and connecting cable loop are faulty.

[0108] If after the handshake signal is established, only one of the decoding boards A and B in the TCR system receives the host decoding information, it can be judged that the TCR host is faulty or the antenna circuit has a problem. You need to use a multimeter to test the resistance of the antenna end on the car to rule out whether it is a problem with the antenna circuit.

[0109] The handshake signal means that the test board is responsible for sending a test request signal and detecting whether there is a response signal sent by the TCR device. If a response message is received, it means that the handshake signal is established.

[0110] Supports generation of three different types of track circuit signals: ZPW2000, UM71, and domestic frequency shift.

[0111] The three modes mainly differ in the carrier frequency values: ZPW2000 and UM71 use 1700Hz, 2000Hz, 2300Hz, and 2600Hz FSK center frequencies; domestic frequency shifting uses 550, 650, 750, and 850FSK center frequencies; ZPW2000 and UM71 have slight differences in the types of low-frequency information.

[0112] The main control module can use commonly used embedded microcontrollers, such as DSP (digital signal processor) series, ARM series, PowerPC series and other commonly used microcontrollers. This case uses TI's TMS320F28xx series digital signal processor DSP and ALTER's EP3C10E144I7.

[0113] The signal generating module of the analog signal processing module is connected to the main control module through the board-level bus interface, and is used to execute different algorithms to generate the track circuit signals required for the simulation test according to the control commands of the main control module.

[0114] Generally, operational amplifiers are used in signal processing circuits to amplify signals. However, due to the heat generation problem of the operational amplifier itself, this involves the processing of the PCB and the peripheral heat dissipation problem, which increases the cost of the chip itself and makes it difficult to maintain. If the load of the operational amplifier changes, the output current will change in amplitude or even have waveform distortion.

[0115] This application designs a signal processing circuit (such as Figure 4 As shown, the schematic diagram is as Figure 5 As shown in the figure, the signal processing circuit in the TCR test board is processed. The circuit is composed of three parts, namely amplitude amplification, filtering, and constant current processing. It can solve the problem of waveform distortion under different loads. The signal processing circuit can amplify the original signal by 2 times; the high-pass filter cutoff frequency realizes the filtering of low-frequency noise interference. In this system, a 16Hz cutoff frequency design is adopted; the constant current processing adopts a constant current control mode to limit the maximum current amplitude. The transistor circuit of the mirror current source is used in the design, which can effectively control the current at 290mA.

[0116] The DDS chip outputs a DDS output differential signal, which is a track circuit analog signal, namely, an FSK signal. The carrier frequency signal of the track circuit is the FSK upper and lower frequencies; the low-frequency information of the track circuit is the FSK period.

[0117] The DDS signal output by the DDS chip is a differential signal, and the filtering and amplification processing of the differential signal is relatively complex. This solution uses the first-stage operational amplifier to build a low-pass filter at the same time, that is, the functions of proportional amplification and low-pass filtering are simultaneously satisfied in one operational amplifier, converting the DDS differential signal into a low-pass filter signal while achieving signal amplification. The amplification proportional coefficient used in this solution is 1.5, and the amplification proportional coefficient can also be modified according to user needs. Since the highest frequency of the track circuit signal is 2600Hz, the cutoff frequency of the low-pass filter in this case is selected as 3000Hz.

[0118] The high-pass filter module uses a passive filter, which is composed of resistors and capacitors. The function of the high-pass filter module is to filter out power frequency interference signals and DC signals, and the cut-off frequency is set at 16Hz.

[0119] The high-resistance output module adopts the input impedance characteristics of the secondary operational amplifier, that is, the input impedance is close to 10MΩ, to ensure that the output change does not interfere with the size of the DDS coding signal. Here, high-resistance output means that the output resistance of the track circuit signal is infinite when viewed from the outside. The high-resistance processing keeps the original track circuit signal voltage amplitude unchanged, but the current amplitude obtained from the DDS module becomes 0A, which can ensure that the signal sent by the DDS module and the output track circuit signal voltage do not affect each other.

[0120] The second-stage operational amplifier also outputs a small AC control signal, which further reduces the signal of the track circuit processed by the high-pass filter module to a small AC signal (i.e., control signal) that can control the triode. This small AC signal directly acts on the triode in the constant current control module, i.e. Figure 4 The output of the operational amplifier of U12-B directly controls the base of the transistor. When the small signal is the voltage of the positive half axis, the Q3 transistor can be controlled, so that the final track circuit signal positive half axis outputs constant current; when the small signal is the voltage of the negative half axis, the Q4 transistor can be controlled, so that the final track circuit signal negative half axis outputs constant current.

[0121] The constant current source output module adopts the mirror current source solution. Taking the positive half axis of the AC signal as an example, after Q3 is turned on, it forms a positive feedback effect with Q1, and Q1 is in the amplification area. The voltage of BE of Q1 is 0.7V. This voltage value and the resistance value between BE form a constant current output with a current value of 290mA. The control logic of the negative half axis is the same as the above description.

[0122] The constant current output here means that the output track circuit signal is a current constant current signal, and the voltage is an uncontrolled signal. The signal is ultimately connected to a coil of the TCR antenna. The resistance of the coil is small, so it must be output in the form of a current source. Using voltage control will cause a large current and generate large power consumption. That is, using a constant current source test can effectively control the output power consumption and the stability of the waveform.

[0123] The PC runs the host computer software to realize graphical operation to generate signal generator configuration commands and graphically display the waveform information sent by each signal channel for operation and monitoring;

[0124] The track circuit antenna is installed at the axle of the high-speed rail. It is used to receive the track signal transmitted from the track. In this design, the host computer and hardware are combined to synthesize the track circuit signal and transmit it to the track circuit antenna.

[0125] The TCR device is responsible for receiving and demodulating the track circuit signal (hereinafter, demodulating the track circuit signal is referred to as decoding) to determine the distance and position relationship between the vehicle and the preceding vehicle. In this design, the track circuit signal synthesized by the circuit can be obtained through the track circuit antenna coupling method.

[0126] Through the PC, send specific host computer simulation track circuit instructions through the RS232 interface, and mix the carrier frequency information and low-frequency information through DSP calculation. DSP sends the digital mixing information to DDS (dedicated digital signal to analog signal chip) through the filter signal processing circuit and sends it to the track circuit antenna. Through the coupling of the antenna itself, the host computer information of the PC is sent to the decoding version for decoding, and the decoded track information is fed back to the PC in the form of graphics.

[0127] The advantages of this system are as follows:

[0128] Adopting modular design concept, it consists of three parts: signal processing module, digital signal processing module and communication interface module;

[0129] The track signal generated by the circuit supports the selection and sending function of three frequency shift modes on site, namely ZPW2000, UM71, and domestic frequency shift.

[0130] It has a host computer graphical operation interface, which is used to generate signal generator configuration commands and display the waveform information sent by each signal channel, which is convenient for operation and monitoring;

[0131] Applicable to the site, it can quickly confirm the status of the track circuit antenna body, determine the status of the cables on and off the vehicle, and determine whether there is interference problem on site.

[0132] It can be used as a board and installed inside the TCR device. It has two states: silent state and test state. When the vehicle is running at high speed, the board can be put into silent state by switching.

[0133] The present application describes multiple embodiments, but the description is exemplary rather than restrictive, and it is obvious to those skilled in the art that there may be more embodiments and implementations within the scope of the embodiments described in the present application. Although many possible feature combinations are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with any other feature or element in any other embodiment, or may replace any other feature or element in any other embodiment.

[0134] Any features shown and / or discussed in this application may be implemented alone or in any appropriate combination.

[0135] In addition, when describing representative embodiments, the specification may have presented the method and / or process as a specific sequence of steps. However, to the extent that the method or process does not rely on the specific order of steps described herein, the method or process should not be limited to the steps in the specific order described. As will be appreciated by those of ordinary skill in the art, other sequences of steps are also possible.

[0136] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

Claims

1. A fault judgment method, characterized in that: generating a track circuit signal according to a test instruction and processing the generated track circuit signal; sending the processed track circuit signal to the TCR device via the track circuit antenna loop; wherein the TCR device is configured to decode the processed track circuit signal; receiving information sent by the TCR device; judging whether the track circuit antenna loop or the TCR device is faulty according to the received information; Before receiving the information sent by the TCR device, including: Sending a handshake signal to the TCR device; The processing of the generated track circuit signal includes: amplifying, low-pass filtering and high-pass filtering the generated track circuit signal; The track circuit signal after amplification, low-pass filtering and high-pass filtering is scaled down, and the scaled-down signal is used as a control signal, and the track circuit signal after amplification, low-pass filtering and high-pass filtering is controlled by the control signal to output a constant current; The determining, based on the received information, whether the track circuit antenna loop or the TCR device is faulty includes: If the received information indicates that the handshake with the TCR device is unsuccessful, determining that the TCR device is faulty; If the received information indicates that the TCR device has not received a track circuit signal, it is determined that the track circuit antenna loop is faulty; If the received information indicates that the TCR device has received part of the track circuit signal, it is determined that the TCR device is faulty or the track circuit antenna loop is faulty; If the received information indicates that the parameters for generating the track circuit signal and the parameters for the decoded signal are different, it is determined that the TCR device is faulty.

2. The method according to claim 1, wherein generating a track circuit signal according to a test instruction comprises: If the test instruction includes parameters of the track circuit signal, generating the track circuit signal according to the parameters of the track circuit signal; If the test instruction does not include the parameters of the track circuit signal, the track circuit signal is generated according to the preset parameters of the track circuit signal.

3. The method of claim 1, further comprising: The judgment result of whether the track circuit antenna loop or TCR equipment is faulty is sent to the host computer.

4. A fault judgment device, characterized in that: It includes a signal processing module and a communication interface module; The signal processing module is configured to receive a test instruction from the communication interface module, generate a track circuit signal according to the test instruction and process the generated track circuit signal; send the processed track circuit signal to the TCR device through the track circuit antenna loop; receive information sent by the TCR device from the communication interface module; and determine whether the track circuit antenna loop or the TCR device is faulty according to the received information; The communication interface module is configured to receive a test instruction from a host computer and receive information sent by the TCR device; the signal processing module is further configured to send a handshake signal to the TCR device through the communication interface module before receiving the information sent by the TCR device; The communication interface module is further configured to forward the handshake signal sent by the signal processing module to the TCR device; The processing of the generated track circuit signal comprises: The generated track circuit signal is amplified, low-pass filtered and high-pass filtered; The track circuit signal after amplification, low-pass filtering and high-pass filtering is scaled down, and the scaled-down signal is used as a control signal. Under the action of the control signal, the track circuit signal after amplification, low-pass filtering and high-pass filtering is converted into a constant current signal; The determining, based on the received information, whether the track circuit antenna loop or the TCR device is faulty includes: If the received information indicates that the handshake with the TCR device is unsuccessful, determining that the TCR device is faulty; If the received information indicates that the TCR device has not received a track circuit signal, it is determined that the track circuit antenna loop is faulty; If the received information indicates that the TCR device has received part of the track circuit signal, it is determined that the TCR device is faulty or the track circuit antenna loop is faulty; If the received information indicates that the parameters for generating the track circuit signal and the parameters for the decoded signal are different, it is determined that the TCR device is faulty.

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