Electromagnetic interference noise detection device and method for self-checking circuit of transponder system

Abstract

The invention relates to an electromagnetic interference noise detection device and method for a self-checking circuit of a transponder system, and the self-checking circuit of the transponder system comprises an FSK (Frequency Shift Keying) self-checking signal generation circuit, a transmitting amplification circuit, a transmitting antenna, a receiving antenna, a receiving filter circuit, a receiving amplification circuit, a signal processing circuit and a signal decision circuit, the electromagnetic interference noise detection device comprises a phase inversion circuit connected between a receiving amplification circuit and a signal processing circuit. The phase inversion circuit performs phase inversion processing on a signal sent by the receiving amplification circuit and then sends the signal to the signal processing circuit, and the signal processing circuit performs superposition processing on the signal subjected to phase inversion processing and a signal sent by the FSK self-checking signal generation circuit and sends the processed signal to the signal decision circuit. Compared with the prior art, the method has the advantages that the time cost and the labor cost of troubleshooting are greatly reduced, and the like.

Description

Technical Field

[0001] The present invention relates to a transponder system, and more particularly to an electromagnetic interference noise detection device and method for a self-test circuit of a transponder system. Background Art

[0002] The transponder system uses the transponder antenna to emit continuous electromagnetic wave signals to activate the ground transponder, and controls the ground transponder to upload signal encoding information in the form of FSK encoding. At present, when the transponder system encounters external electromagnetic noise, especially strong electromagnetic noise in the surrounding frequency band, the self-test signal is often abnormal or even the positioning information is lost. In most cases, it is necessary to arrange a special test time period during non-operating hours (commonly known as the skylight point in the industry) to troubleshoot the cause of the problem.

[0003] Therefore, the prior art has the following defects:

[0004] 1. Problem phenomena are difficult to reproduce: Especially when encountering sporadic problems, the probability of the problem occurring is low, and often it takes some luck to reproduce the problem;

[0005] 2. Difficulty in troubleshooting: Even if the problem phenomenon can be reproduced, the entire train system is complex and has many devices, so it is difficult to find truly useful information from the massive system data records;

[0006] 3. Difficulty in locating the cause of the problem: Although the transponder system is more susceptible to electromagnetic interference noise, sometimes there are other reasons (such as software code bugs, component failure, etc.) that cause problems;

[0007] 4. Fault recording is difficult: Due to the real-time requirement of the self-test signal, if the information of the self-test signal is recorded throughout the process (the sampling rate requirement is high), it will bring a huge amount of data information and require a large amount of storage space for data recording.

[0008] After searching, Chinese patent publication number CN117978626A discloses a transponder transmission system diagnostic method, system and electronic device, which specifically discloses that the fault is located according to the energy value of the transponder obtained by the antenna self-test, the host parsing the message of other transponders in the route, and the host parsing the message of the current transponder in the historical time of the route; wherein the fault location includes the current transponder fault, the host receiving board fault, the current transponder electromagnetic environment interference and the current train electromagnetic environment interference. However, the existing patent does not have active noise reduction technology, so how to introduce active noise reduction technology into the transponder system self-test circuit to achieve more efficient transponder electromagnetic interference detection has become a technical problem that needs to be solved. Summary of the invention

[0009] The purpose of the present invention is to overcome the defects of the prior art and provide an electromagnetic interference noise detection device and method for a transponder system self-test circuit.

[0010] The purpose of the present invention can be achieved by the following technical solutions:

[0011] According to a first aspect of the present invention, there is provided an electromagnetic interference noise detection device for a transponder system self-test circuit, the transponder system self-test circuit comprising an FSK self-test signal generating circuit, a transmitting amplifying circuit, a transmitting antenna, a receiving antenna, a receiving filtering circuit, a receiving amplifying circuit, a signal processing circuit and a signal decision circuit, the electromagnetic interference noise detection device comprising a phase inversion circuit connected between the receiving amplifying circuit and the signal processing circuit;

[0012] The phase inversion circuit performs phase inversion processing on the signal sent by the receiving amplifier circuit and sends it to the signal processing circuit. The signal processing circuit superimposes the signal after phase inversion processing with the signal sent by the FSK self-test signal generating circuit and sends the processed signal to the signal decision circuit.

[0013] As a preferred technical solution, the FSK self-check signal generating circuit generates three FSK self-check signals, one of which is used for the self-check signal, one is used for the self-check signal comparison, and the remaining one is used for the processing of the phase reversal signal.

[0014] As a preferred technical solution, the FSK self-test signal generating circuit has a switch control input signal for controlling the sending of the FSK self-test signal.

[0015] As a preferred technical solution, the receiving amplifier circuit includes two signal outputs, one of which is directly sent to the signal processing circuit for signal self-checking, and the other is directly sent to the phase inversion circuit.

[0016] As a preferred technical solution, the signal processing circuit includes two groups of completely independent signal processing units.

[0017] As a preferred technical solution, a group of the signal processing units is used for signal self-detection, processing the detection signal sent by the receiving amplifier circuit, and directly sending it to the signal decision circuit after filtering, shaping and demodulation.

[0018] As a preferred technical solution, another group of the signal processing units is used for electromagnetic interference noise detection, filtering the phase-reversed signal, and superimposing the filtered phase-reversed signal with the signal sent by the FSK self-test signal generating circuit, and then sending the superimposed signal to the signal judgment circuit.

[0019] As a preferred technical solution, the device also includes a noise waveform recording memory connected to the signal decision circuit, which is used to store the signal waveform sent by the signal decision circuit.

[0020] As a preferred technical solution, the noise waveform recording memory stores the signal waveform of the self-test signal that fails, which is used as a noise signal for troubleshooting fault problems.

[0021] As a preferred technical solution, the signal judgment circuit compares the self-test signal output by the signal processing circuit with the original self-test signal, and outputs the result to the automatic protection system for further processing. If the self-test fails, the phase-reversal superposition signal output by the signal processing circuit is sent to the noise waveform recording memory for storage and time-stamping.

[0022] As a preferred technical solution, the signal decision circuit compares the self-test signal with the original self-test signal specifically as follows:

[0023] If the comparison results are consistent, a self-test success signal is sent to the automatic protection system, and at the same time, the enable signal for the FSK self-test signal generation circuit is maintained;

[0024] If the comparison results are inconsistent, the formal message of the transponder will be judged again.

[0025] As a preferred technical solution, if the signal received by the signal judgment circuit is judged to be a formal message signal, a close signal is output to the FSK self-test signal generation circuit to turn off the sending of the self-test signal; when the formal message signal is no longer received, an open signal is output to the FSK self-test signal generation circuit to start the sending of the self-test signal.

[0026] As a preferred technical solution, the specific process of the signal decision circuit determining the formal message of the transponder includes:

[0027] If it is determined to be a formal message and the CRC decoding is correct, the message will be directly sent to the automatic protection system for subsequent processing, and the FSK self-test signal generation circuit will be disabled at the same time;

[0028] If it is judged to be a formal message but the CRC decoding is wrong, the error message will still be sent to the automatic protection system for subsequent processing, and the FSK self-test signal generation circuit will be disabled, and the CPU will be informed to generate a noise storage command and perform corresponding operations;

[0029] If it is determined that it is not message data, it is considered that the self-test fails, and the enable signal to the FSK self-test signal generation circuit is maintained. At the same time, the CPU generates a noise storage command and executes the corresponding operation.

[0030] According to a second aspect of the present invention, there is provided a detection method using the electromagnetic interference noise detection device for the transponder system self-test circuit, the method comprising: the phase inversion circuit performs phase inversion processing on the signal sent by the receiving amplifier circuit and sends it to the signal processing circuit, the signal processing circuit performs superposition processing on the signal after phase inversion processing and the signal sent by the FSK self-test signal generation circuit, and sends the processed signal to the signal decision circuit;

[0031] The signal judgment circuit compares the self-test signal output by the signal processing circuit with the original self-test signal, and outputs the result to the automatic protection system for further processing. If the self-test fails, the phase-reversed superposition signal output by the signal processing circuit is sent to the noise waveform recording memory for storage and time stamping.

[0032] According to a third aspect of the present invention, there is provided an electronic device, comprising a memory and a processor, wherein a computer program is stored in the memory, and the method described above is implemented when the processor executes the program.

[0033] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, wherein the program implements the method described when executed by a processor.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] 1) Based on the present invention, on-site maintenance personnel can quickly confirm whether the cause of the problem is related to electromagnetic interference noise by reading the records in the noise memory at the first time, and can accurately know the time point and duration of the occurrence;

[0036] 2) The present invention introduces the design method of active noise reduction technology into the transponder system design, realizing the cross-border application of new technology;

[0037] 3) The present invention is an integrated technical solution that can be combined with existing products. At the same time, it is deeply bound to the existing circuit design. While providing a new active noise reduction technical method, it retains the design content of the original technology to the greatest extent, reducing the new knowledge learning cost for developers. Some designs can directly use the old design solution;

[0038] 4) The present invention requires fewer newly added circuit structures and is a technical solution that can be realized at a relatively low cost. At the same time, since it does not change the content of the existing design, it can reduce the evaluation cost of the safety design and can maximize the use of existing resources for production and manufacturing;

[0039] 5) The present invention provides a more efficient transponder electromagnetic interference problem detection technology, which greatly reduces the time and manpower costs of problem troubleshooting, while also reducing the professional knowledge requirements for troubleshooters, and even allows users to make preliminary problem troubleshooting decisions directly through analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the self-test circuit structure of the transponder system;

[0041] Figure 2 It is a structural schematic diagram of the electromagnetic interference detection device of the present invention;

[0042] Figure 3 It is a schematic diagram of the signal phase inversion process of the present invention;

[0043] Figure 4 It is a schematic diagram of the signal superposition process and results of the present invention. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] The purpose of the present invention is to provide an efficient transponder electromagnetic interference noise detection device. The present invention draws on the design concept of active noise reduction headphones and realizes a method of separating noise signals by reversely receiving signals and superimposing them on the original signals.

[0046] like Figure 1 In the original design, the FSK self-test signal is generated by the generation circuit, passed through the transmitting amplifier circuit, and then transmitted to the space through the transmitting antenna, and then received by the receiving antenna, filtered by the receiving filter circuit, and then passed through the receiving amplifier circuit and entered the signal processing circuit for further filtering, shaping, and demodulation; finally, it is compared with the FSK self-test signal in the signal judgment circuit to confirm whether the receiving circuit is normal and reliable, and finally the result is output to the automatic protection system for further processing.

[0047] like Figure 2As shown, an electromagnetic interference noise detection device for a transponder system self-test circuit, the transponder system self-test circuit includes an FSK self-test signal generating circuit 1, a transmitting amplifier circuit 2, a transmitting antenna 3, a receiving antenna 4, a receiving filter circuit 5, a receiving amplifier circuit 6, a signal processing circuit 7 and a signal decision circuit 8, the electromagnetic interference noise detection device includes a phase inversion circuit 9 connected between the receiving amplifier circuit 6 and the signal processing circuit 7; the phase inversion circuit 9 performs phase inversion processing on the signal sent by the receiving amplifier circuit 6 and sends it to the signal processing circuit 7, the signal processing circuit 7 superimposes the signal after the phase inversion processing with the signal sent by the FSK self-test signal generating circuit 1, and sends the processed signal to the signal decision circuit 8.

[0048] The FSK self-check signal generating circuit 1 generates three FSK self-check signals, one of which is used for self-check signal, one is used for self-check signal comparison, and the remaining one is used for processing phase reversal signal. The FSK self-check signal generating circuit 1 has a switch control input signal for controlling the sending of the FSK self-check signal.

[0049] Compared with the original design, the receiving amplifier circuit 6 not only amplifies the signal to the TTL level to ensure signal stability, but also adds an additional signal output (two in total), one of which is directly sent to the signal processing circuit 7 for signal self-checking, and the other is directly sent to the phase inversion circuit 9.

[0050] like Figure 3 As shown, the phase inversion circuit (one of the core technologies of active noise reduction) uses a special circuit design to perform phase inversion processing on the signal sent by the receiving amplifier circuit to ensure that the amplitude of the signal does not change, and then sends the signal to the signal processing circuit.

[0051] The signal processing circuit 7 includes two groups of completely independent signal processing units. One group of signal processing units is used for signal self-detection, processes the detection signal sent by the receiving amplifier circuit 6, and directly sends it to the signal decision circuit 8 after filtering, shaping, and demodulation. The other group of signal processing units is used for electromagnetic interference noise detection, filters the phase-inverted signal, and superimposes the filtered phase-inverted signal with the signal sent by the FSK self-detection signal generation circuit 1, and then sends the superimposed signal to the signal decision circuit 8.

[0052] The device also includes a noise waveform recording memory 10 connected to the signal decision circuit 8, which is used to store the signal waveform sent by the signal decision circuit. The noise waveform recording memory 10 stores the signal waveform of the self-test signal that fails, which is used as a noise signal for troubleshooting.

[0053] The signal decision circuit 8 compares the self-test signal output by the signal processing circuit with the original self-test signal, and outputs the result to the automatic protection system for further processing. If the self-test fails, the phase inversion superposition signal output by the signal processing circuit 7 is sent to the noise waveform recording memory 10 for storage and time stamping. If the signal received by the signal decision circuit 8 is determined to be a formal message signal, a closing signal is output to the FSK self-test signal generation circuit 1 to close the self-test signal transmission; when the formal message signal is no longer received, an opening signal is output to the FSK self-test signal generation circuit 1 to open the self-test signal transmission. Specific embodiments

[0055] 1. In general, when the FPGA is used as the FSK self-test signal generator, it will always receive the enable signal provided by the CPU used as the signal judgment circuit, and continue to generate and send three sets of TTL-level self-test signals, which are provided to:

[0056] After being amplified by the transmitting amplifier circuit, it is sent to the air via a dedicated transmitting antenna for propagation [Signal A];

[0057] The signal is sent to the signal processing circuit (FPGA) and superimposed with the phase-inverted received self-test signal [Signal B].

[0058] The signal is sent to the signal decision circuit (CPU) for comparison with the received self-test signal to confirm whether there is any abnormality or failure in the FSK receiving link (signal C);

[0059] 2. The FSK self-test signal propagating in the air will be received by the receiving antenna and will be band-pass filtered by the receiving filter circuit to remove the interference noise signal outside the FSK working frequency band as much as possible [Signal A is converted to Signal A1];

[0060] 3. The FSK self-test signals after bandpass filtering will be sent to the receiving amplifier circuit, where they will be amplified to TTL level and provided to:

[0061] It is sent to the signal processing circuit (FPGA) for further bandpass filtering, shaping and demodulation, and then sent to the signal decision circuit (CPU) after analog-to-digital conversion [signal A1 is converted to signal A2];

[0062] It is sent to the phase inversion circuit (FPGA) for phase inversion operation. After the operation is completed, it is sent to the signal processing circuit (FPGA) [Signal B is converted into signal B1];

[0063] 4. After the phase-inverted signal enters the signal processing circuit, it is first further bandpass filtered, shaped and demodulated, and then independently superimposed with the self-test signal from the FSK self-test signal generation circuit to generate a new signal and send it to the signal decision circuit (CPU) [Signal B1 is converted into signal D after operation with signal C];

[0064] 5. In the signal decision circuit (CPU), the following tasks will be completed:

[0065] After a series of operations such as phase inversion and superposition, the signal is operated as follows according to the comparison result of the FSK self-test signal [comparison between signal A2 and signal C]:

[0066] After the signal comparison, a noise storage command is generated, and the CPU transfers the signal at this moment to the noise waveform recording memory and adds a time stamp [storage signal D and time information];

[0067] If no noise storage command is generated after signal comparison, the CPU will discard the signal [save discarded signal D data].

[0068] The FSK self-test signals after different link processing are compared in the circuit [Signal A2 is compared with Signal C], and the following operations are completed according to the judgment results:

[0069] If the comparison results are consistent, a self-test success signal is sent to the automatic protection system, and at the same time, the enable signal for the FSK self-test signal generation circuit is maintained;

[0070] If the comparison results are inconsistent, the formal message of the transponder is judged again:

[0071] If it is determined to be a formal message and the CRC decoding is correct, the message will be directly sent to the automatic protection system for subsequent processing, and the FSK self-test signal generation circuit will be disabled at the same time;

[0072] If it is judged to be a formal message but the CRC decoding is wrong, the error message will still be sent to the automatic protection system for subsequent processing, and the FSK self-test signal generation circuit will be disabled, and the CPU will be informed to generate a noise storage command and perform corresponding operations;

[0073] If it is determined that it is not message data, it is considered that the self-test fails, and the enable signal to the FSK self-test signal generation circuit is maintained. At the same time, the CPU generates a noise storage command and executes the corresponding operation.

[0074] The design has been tested in detail during project development, proving that it is feasible.

[0075] The above is an introduction to the device embodiment. The following is a method embodiment to further illustrate the solution of the present invention.

[0076] The present invention provides a detection method using the electromagnetic interference noise detection device for the transponder system self-test circuit, the method comprising: the phase inversion circuit 9 performs phase inversion processing on the signal sent by the receiving amplifier circuit 6 and sends it to the signal processing circuit 7, the signal processing circuit 7 performs superposition processing on the signal after the phase inversion processing and the signal sent by the FSK self-test signal generating circuit 1, and sends the processed signal to the signal decision circuit 8;

[0077] The signal judgment circuit 8 compares the self-test signal output by the signal processing circuit with the original self-test signal, and outputs the result to the automatic protection system for further processing. If the self-test fails, the phase-reversal superposition signal output by the signal processing circuit 7 is sent to the noise waveform recording memory 10 for storage and time stamping.

[0078] The embodiment of the present invention also provides an electronic device including a central processing unit (CPU), which can perform various appropriate actions and processes according to computer program instructions stored in a read-only memory (ROM) or computer program instructions loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for device operation can also be stored. The CPU, ROM, and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0079] Multiple components in the device are connected to the I / O interface, including: input units, such as keyboards, mice, etc.; output units, such as various types of displays, speakers, etc.; storage units, such as disks, optical disks, etc.; and communication units, such as network cards, modems, wireless communication transceivers, etc. The communication unit allows the device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunication networks.

[0080] The processing unit performs the various methods and processes described above, such as the method of the present invention. For example, in some embodiments, the method of the present invention can be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit. In some embodiments, part or all of the computer program can be loaded and / or installed on the device via a ROM and / or a communication unit. When the computer program is loaded into RAM and executed by the CPU, one or more steps of the method of the present invention described above can be performed. Alternatively, in other embodiments, the CPU can be configured to perform the method of the present invention by any other appropriate means (e.g., by means of firmware).

[0081] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0082] The program code for implementing the method of the present invention can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0083] In the context of the present invention, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0084] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An electromagnetic interference noise detection device for a transponder system self-test circuit, the transponder system self-test circuit comprising an FSK self-test signal generating circuit (1), a transmitting amplifying circuit (2), a transmitting antenna (3), a receiving antenna (4), a receiving filtering circuit (5), a receiving amplifying circuit (6), a signal processing circuit (7) and a signal decision circuit (8), characterized in that: The electromagnetic interference noise detection device comprises a phase inversion circuit (9) connected between a receiving amplification circuit (6) and a signal processing circuit (7); The phase inversion circuit (9) performs phase inversion processing on the signal sent by the receiving amplifier circuit (6) and sends it to the signal processing circuit (7). The signal processing circuit (7) performs superposition processing on the signal after phase inversion processing and the signal sent by the FSK self-check signal generating circuit (1), and sends the processed signal to the signal decision circuit (8).

2. The electromagnetic interference noise detection device for the self-test circuit of the transponder system according to claim 1, characterized in that: The FSK self-check signal generating circuit (1) generates three FSK self-check signals, one of which is used for the self-check signal, one is used for the self-check signal comparison, and the remaining one is used for the processing of the phase inversion signal.

3. The electromagnetic interference noise detection device for the self-test circuit of the transponder system according to claim 1, characterized in that: The FSK self-check signal generating circuit (1) has a switch control input signal for controlling the sending of the FSK self-check signal.

4. The electromagnetic interference noise detection device for the self-test circuit of the transponder system according to claim 1, characterized in that: The receiving amplifier circuit (6) includes two signal outputs, one of which is directly sent to the signal processing circuit (7) for signal self-checking, and the other is directly sent to the phase inversion circuit (9).

5. The electromagnetic interference noise detection device for the self-test circuit of the transponder system according to claim 1, characterized in that: The signal processing circuit (7) comprises two groups of completely independent signal processing units.

6. The electromagnetic interference noise detection device for the self-test circuit of the transponder system according to claim 5, characterized in that: A group of the signal processing units is used for signal self-detection, processing the detection signal sent by the receiving amplifier circuit (6), and directly sending it to the signal decision circuit (8) after filtering, shaping and demodulation.

7. The electromagnetic interference noise detection device for the self-test circuit of the transponder system according to claim 6, characterized in that: Another group of signal processing units is used for electromagnetic interference noise detection, filtering the phase-inverted signal, superimposing the filtered phase-inverted signal with the signal sent by the FSK self-check signal generating circuit (1), and then sending the superimposed signal to the signal decision circuit (8).

8. The electromagnetic interference noise detection device for the self-test circuit of a transponder system according to claim 1, characterized in that: The device also includes a noise waveform recording memory (10) connected to the signal decision circuit (8) and used for storing the signal waveform sent by the signal decision circuit.

9. The electromagnetic interference noise detection device for the self-test circuit of the transponder system according to claim 8, characterized in that: The noise waveform recording memory (10) stores the signal waveform of the self-test signal that fails, which is used as a noise signal for troubleshooting fault problems.

10. The electromagnetic interference noise detection device for the self-test circuit of the transponder system according to claim 8, characterized in that: The signal decision circuit (8) compares the self-test signal output by the signal processing circuit with the original self-test signal, and outputs the result to the automatic protection system for further processing. If the self-test fails, the phase inversion superposition signal output by the signal processing circuit (7) is sent to the noise waveform recording memory (10) for storage and time stamping.

11. The electromagnetic interference noise detection device for the self-test circuit of a transponder system according to claim 10, characterized in that: The signal decision circuit (8) compares the self-test signal with the original self-test signal in the following manner: If the comparison results are consistent, a self-test success signal is sent to the automatic protection system, and at the same time, the enable signal for the FSK self-test signal generation circuit is maintained; If the comparison results are inconsistent, the formal message of the transponder will be judged again.

12. The electromagnetic interference noise detection device for the self-test circuit of the transponder system according to claim 11, characterized in that: If the signal received by the signal decision circuit (8) is determined to be a formal message signal, a closing signal is output to the FSK self-check signal generation circuit (1) to close the self-check signal transmission; when no formal message signal is received, an opening signal is output to the FSK self-check signal generation circuit (1) to open the self-check signal transmission.

13. The electromagnetic interference noise detection device for the self-test circuit of the transponder system according to claim 12, characterized in that: The specific process of the signal decision circuit (8) deciding the formal message of the transponder includes: If it is determined to be a formal message and the CRC decoding is correct, the message will be directly sent to the automatic protection system for subsequent processing, and the FSK self-test signal generation circuit will be disabled at the same time; If it is judged to be a formal message but the CRC decoding is wrong, the error message will still be sent to the automatic protection system for subsequent processing, and the FSK self-test signal generation circuit will be disabled, and the CPU will be informed to generate a noise storage command and perform corresponding operations; If it is determined that it is not message data, it is considered that the self-test fails, and the enable signal to the FSK self-test signal generation circuit is maintained. At the same time, the CPU generates a noise storage command and executes the corresponding operation.

14. A detection method using the electromagnetic interference noise detection device for a transponder system self-test circuit according to any one of claims 1 to 13, characterized in that: The method comprises: the phase inversion circuit (9) performs phase inversion processing on the signal sent by the receiving amplifier circuit (6) and then sends it to the signal processing circuit (7); the signal processing circuit (7) performs superposition processing on the signal after the phase inversion processing and the signal sent by the FSK self-check signal generating circuit (1), and then sends the processed signal to the signal decision circuit (8); The signal decision circuit (8) compares the self-test signal output by the signal processing circuit with the original self-test signal, and outputs the result to the automatic protection system for further processing. If the self-test fails, the phase inversion superposition signal output by the signal processing circuit (7) is sent to the noise waveform recording memory (10) for storage and time stamping.

15. An electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein: When the processor executes the program, the method according to claim 14 is implemented.

16. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to claim 14 is implemented.

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