A trackside circuit control system

Abstract

This invention discloses a trackside circuit control system. The system includes: a signal receiving module, an isolated input module, an isolated output module, a main control module, a signal generation and feedback module, a first and second switching module, and a digital power amplifier module. The main control module sends the digitally encoded information isolated from the isolated input module to the signal generation and feedback module. The signal generation and feedback module converts the digitally encoded information into a frequency-shifted signal and feeds it back to the main control module. When the frequency of the frequency-shifted signal is within a preset frequency range, the main control module controls the first switching module to conduct, enabling the signal generation and feedback module to output the frequency-shifted signal to the digital power amplifier module. The digital power amplifier module amplifies the frequency-shifted signal and feeds it back to the main control module. The main control module also controls the second switching module to conduct when the amplitude and phase of the amplified frequency-shifted signal meet a preset amplitude and phase range. The main control module also outputs the track circuit transmission signal received by the signal receiving module through the isolated output module.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of track circuit technology, and in particular to a trackside track circuit control system. Background Technology

[0002] Track circuit systems are the basic equipment for railway signaling and are widely used in railways and urban rail transit. By checking the vacancy and occupancy of the track circuit section, they provide the train's location information and can also provide the train with information about the section ahead, ensuring the safe and efficient operation of the train.

[0003] The track circuit system commonly used in high-speed rail systems currently consists of transmitting equipment, signal conditioning equipment, and receiving equipment. The principle of the track circuit system is as follows: the rails act as cables. The indoor transmitting equipment receives analog switching signals via relays to obtain modulated signals carrying information and sends them to the signal conditioning equipment. The transformer in the signal conditioning equipment adjusts the signal level, and then the level-adjusted modulated signal is sent to the outdoor rails. The signal transmitted from the outdoor rails is received by the indoor receiving equipment, demodulated, and used for functions such as checking for occupancy and faults in the current section. Currently, the transmitting, receiving, and signal conditioning equipment are all independently designed, resulting in a large variety of equipment and low integration. Furthermore, both the transmitting and receiving equipment require external relays for encoding, and the signal conditioning equipment is needed for signal adjustment, leading to a large amount of redundant circuitry and complex configuration. Additionally, since the transmitting and receiving equipment are located indoors, signal cables are required to transmit information to the transmitting equipment. To minimize the attenuation of the analog signal, dedicated SPT railway signal shielded cables are used, resulting in long operating distances and high costs. Summary of the Invention

[0004] This invention provides a trackside circuit control system that integrates the transmitting and receiving devices, eliminates the level adjustment device, and avoids circuit redundancy in the overall control system. Furthermore, placing the control system on the trackside also reduces the overall cost of the control system.

[0005] To achieve the above objectives, embodiments of the present invention provide a trackside track circuit control system, which includes: a signal receiving module, an isolation input module, an isolation output module, a main control module, a signal generation and feedback module, a first switching module, a digital power amplifier module, and a second switching module;

[0006] The signal receiving module, the isolated input module, the isolated output module, and the signal generation and feedback module are electrically connected to the input terminal of the main control module; the output terminal of the main control module is connected to the signal generation and feedback module; the signal generation and feedback module is also electrically connected to the input terminal of the digital power amplifier module through the first switching module; the output terminal of the digital power amplifier module is electrically connected to the signal output terminal through the second switching module; the feedback terminal of the digital power amplifier module is electrically connected to the main control module.

[0007] The main control module is used to send the digitally encoded information isolated by the isolated input module to the signal generation and feedback module; the signal generation and feedback module is used to convert the digitally encoded information into a frequency-shifted signal and feed back the frequency of the frequency-shifted signal to the main control module.

[0008] The main control module is used to control the first switching module to turn on so that the signal generation and feedback module outputs the frequency-shifted signal to the digital power amplifier module when the frequency of the frequency-shifted signal is within a preset frequency range; the digital power amplifier module is used to amplify the frequency-shifted signal and feed it back to the main control module.

[0009] The main control module is further configured to control the second switching module to turn on so that the amplified frequency shift signal is output when the amplitude and phase of the amplified frequency shift signal meet the preset amplitude and phase range; the main control module is further configured to output the track circuit transmission signal received by the signal receiving module through the isolation output module.

[0010] Optionally, the main control module is further configured to output adjusted digital encoding information to the signal generation and feedback module when the amplitude and phase of the amplified frequency-shifted signal do not meet the preset amplitude and phase range, so that the signal generation and feedback module outputs the adjusted frequency-shifted signal.

[0011] Optionally, the main control module is further configured to adjust the track circuit transmission signal according to the amplified frequency shift signal when the track circuit transmission signal received by the signal receiving module does not meet the preset transmission signal, and output the adjusted track circuit transmission signal through the isolation output module.

[0012] Optionally, the main control module is further configured to output adjusted digital encoding information to the signal generation and feedback module when the amplitude and phase of the amplified frequency-shifted signal do not meet the preset amplitude and phase, so that the signal generation and feedback module outputs an adjusted frequency-shifted signal, including:

[0013] Establish a dynamic model of track impedance; determine the real-time monitoring impedance based on the amplified frequency-shifted signal; apply a compensation model to the real-time monitoring impedance prediction signal; and determine the compensation adjustment digital coding information based on the signal compensation model.

[0014] Optionally, when the track circuit transmission signal received by the signal receiving module does not meet the preset transmission signal, the track circuit transmission signal is adjusted according to the amplified frequency shift signal, including:

[0015] The transmitted signal of the track circuit is digitally filtered based on the amplified frequency-shifted signal.

[0016] The filtered transmitted signal from the track circuit is analyzed in time and frequency to extract signal distortion characteristic parameters.

[0017] The compensation coefficient is determined based on the signal distortion characteristic parameters to adjust the transmitted signal of the track circuit.

[0018] Optionally, the system further includes: an auxiliary control module; the main control module is communicatively connected to the auxiliary control module;

[0019] The signal receiving module, the isolated input module, the isolated output module, and the signal generation and feedback module are also electrically connected to the input terminal of the auxiliary control module; the output terminal of the auxiliary control module is connected to the signal generation and feedback module; and the feedback terminal of the digital power amplifier module is electrically connected to the auxiliary control module.

[0020] The auxiliary control module is used to send the digital encoding information input by the isolation input module to the signal generation and feedback module; the signal generation and feedback module is also used to convert the digital encoding information sent by the auxiliary control module into a frequency shift signal when the digital encoding information sent by the auxiliary control module is the same as the digital encoding information sent by the main control module, and to feed back the frequency of the frequency shift signal to the auxiliary control module.

[0021] The main control module is used to control the first switching module to turn on when the frequency of the frequency-shifting signal sent by the auxiliary control module is the same as the frequency of the frequency-shifting signal fed back by the signal generation and feedback module, and when the frequency of the frequency-shifting signal is within a preset frequency range; the digital power amplifier module is also used to amplify the frequency-shifting signal and feed it back to the auxiliary control module.

[0022] The main control module is also used to control the second switching module to turn on so that the amplified frequency shift signal is output when the amplified frequency shift signal sent by the auxiliary control module and the amplified frequency shift signal fed back by the digital power amplifier module are the same, and when the amplitude and phase of the amplified frequency shift signal meet the preset amplitude and phase range.

[0023] The auxiliary control module is also used to receive the track circuit transmission signal sent by the signal receiving module; and when the track circuit transmission signal sent by the main control module is the same as the track circuit transmission signal sent by the signal receiving module, the track circuit transmission signal is output through the isolation output module.

[0024] Optionally, the first switching module includes a first security AND gate; the second switching module includes a second security AND gate.

[0025] Optionally, the main control module is further configured to adjust the track circuit transmission signal according to the amplified frequency shift signal when the track circuit transmission signal received by the signal receiving module does not meet the preset transmission signal, including:

[0026] The amplified frequency-shifted signal is subjected to a power safety lockout adjustment method to output the adjusted digital encoded information; wherein, the power safety lockout adjustment method includes: a threshold power adjustment method and a power signal compensation adjustment method.

[0027] Optionally, the threshold power adjustment method is specifically as follows:

[0028] A current threshold level is set for the amplified frequency-shifted signal; the corresponding power mode is adjusted according to the frequency-shifted signal after the current threshold level is set.

[0029] Optionally, the power signal compensation and adjustment method is specifically as follows:

[0030] The power signal is determined based on the amplified frequency-shifted signal; signal distortion feature parameters are extracted from the power signal; and a power compensation factor is determined based on the signal distortion feature parameters to output the adjusted digital encoding information.

[0031] In this embodiment of the invention, the main control module sends the digitally encoded information isolated by the isolation input module to the signal generation and feedback module. The signal generation and feedback module converts the digitally encoded information into a frequency-shifted signal and feeds back the frequency of the frequency-shifted signal to the main control module. When the frequency of the frequency-shifted signal is within a preset frequency range, the main control module controls the first switching module to conduct so that the signal generation and feedback module outputs the frequency-shifted signal to the digital power amplifier module. The digital power amplifier module amplifies the frequency-shifted signal and feeds it back to the main control module. The main control module also controls the second switching module to conduct so that the amplified frequency-shifted signal is output when the amplitude and phase of the amplified frequency-shifted signal meet the preset amplitude and phase range. The main control module also outputs the track circuit transmission signal received by the signal receiving module through the isolation output module. Thus, this solution integrates the transmitting and receiving devices, eliminates the level adjustment device, and avoids the circuit redundancy design of the overall control system. Furthermore, since the control system is located beside the track, it avoids crosstalk caused by using long signal cables to transmit analog signals in the prior art, which also results in lower cost and stronger signal anti-interference capability of the overall control system. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a trackside circuit control system provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of another trackside circuit control system provided in an embodiment of the present invention. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0035] Figure 1 This is a schematic diagram of the structure of a trackside circuit control system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the trackside track circuit control system includes: a signal receiving module 10, an isolation input module 20, an isolation output module 30, a main control module 40, a signal generation and feedback module 50, a first switching module 60, a digital power amplifier module 70, and a second switching module 80.

[0036] The signal receiving module 10, the isolated input module 20, the isolated output module 30, and the signal generation and feedback module 50 are electrically connected to the input terminal of the main control module 40; the output terminal of the main control module 40 is electrically connected to the signal generation and feedback module 50; the signal generation and feedback module 50 is also electrically connected to the input terminal of the digital power amplifier module 70 through the first switching module 60; the output terminal of the digital power amplifier module 70 is electrically connected to the signal output terminal through the second switching module 80; the feedback terminal of the digital power amplifier module 70 is electrically connected to the main control module 40.

[0037] The main control module 40 is used to send the digitally encoded information isolated by the isolation input module 20 to the signal generation and feedback module 50; the signal generation and feedback module 50 is used to convert the digitally encoded information into a frequency-shifted signal and feed back the frequency of the frequency-shifted signal to the main control module 40.

[0038] The main control module 40 is used to control the first switching module 60 to turn on when the frequency of the frequency shift signal is within a preset frequency range, so that the signal generation feedback module 50 outputs the frequency shift signal to the digital power amplifier module 70; the digital power amplifier module 70 is used to amplify the frequency shift signal and feed it back to the main control module 40.

[0039] The main control module 40 is also used to control the second switching module 80 to turn on so that the amplified frequency shift signal is output when the amplitude and phase of the amplified frequency shift signal meet the preset amplitude and phase range; the main control module 40 is also used to output the track circuit transmission signal received by the signal receiving module 10 through the isolation output module 30.

[0040] In this embodiment, the trackside circuit control system is located beside the track. The trackside circuit control system is powered and communicated with the indoor system via a PLC carrier power line. Specifically, the indoor system is connected to the isolation input module 20 via a PLC carrier power line. The isolation input module 20 can be an optocoupler or a digital isolation chip, which can isolate the transmission of digital coded information indoors. Because the isolation input module 20 can isolate the transmission of digital coded information indoors, the input digital coded information has stronger anti-interference capabilities.

[0041] The indoor circuit is also connected to the isolation output module 30 via the PLC carrier power line; the isolation output module 30 can be an optocoupler or a digital isolation chip, which can isolate and output the track circuit's transmitted signal; the track circuit's transmitted signal is a digital signal, so the output track circuit's transmitted signal has stronger anti-interference capability;

[0042] The first switching module 60 can be turned on when the frequency of the frequency shift signal is within a preset frequency range. The first switching module 60 can be any switching device. This embodiment does not limit the specific configuration of the first switching module 60. Optionally, the first switching module 60 can be a first safety AND gate.

[0043] The second switching module 80 can be turned on when the amplitude and phase of the amplified frequency-shifted signal meet the preset amplitude and phase range. In this embodiment, the second switching module 80 can be any switching device; the specific configuration of this embodiment is not limited; optionally, the second switching module 80 is a second safety AND gate.

[0044] Specifically, in this embodiment of the invention, the main control module 40 sends the digitally encoded information isolated by the isolation input module 10 to the signal generation and feedback module 50; the signal generation and feedback module 50 converts the digitally encoded information into a frequency-shifted signal and feeds back the frequency of the frequency-shifted signal to the main control module 40; when the frequency of the frequency-shifted signal is within a preset frequency range, the main control module 40 controls the first switching module 60 to be turned on, thereby enabling the signal generation and feedback module 50 to output the frequency-shifted signal to the digital power amplifier module 70; the digital power amplifier module 70 amplifies the frequency-shifted signal and feeds it back to the main control module 40; the main control module 40 also controls the second switching module 80 to be turned on when the amplitude and phase of the amplified frequency-shifted signal meet a preset amplitude and phase range, thereby enabling the amplified frequency-shifted signal to be output to the track circuit;

[0045] Meanwhile, the main control module 40 also outputs the track circuit transmission signal received by the signal receiving module 10 through the isolation output module 30. This allows the indoor system to check the occupancy of the track circuit section based on the transmitted signal, providing the train's location information and information about the section ahead, ensuring safe and efficient train operation. This solution integrates the transmitting and receiving equipment, eliminating level adjustment equipment and avoiding redundant circuit design in the overall control system. Furthermore, the control system is located beside the track, using the isolation input module 20 to transmit digital encoded information and the isolation output module 30 to transmit the track circuit transmission signal. This avoids signal crosstalk caused by the use of long signal cables to transmit analog signals in existing technologies where the system is located indoors, resulting in lower overall control system cost and stronger signal anti-interference capability.

[0046] Optionally, based on the above embodiments, the functions of the main control module 40 can be further optimized, and reference can be continued. Figure 1 The main control module 40 is also used to output adjusted digital encoding information to the signal generation feedback module 50 when the amplitude and phase of the amplified frequency shift signal do not meet the preset amplitude and phase range, so that the signal generation feedback module 50 outputs the adjusted frequency shift signal.

[0047] The main control module 40 can output adjusted digital encoding information to the signal generation and feedback module 50 when the amplitude and phase of the amplified frequency-shifted signal do not meet the preset amplitude and phase range. The signal generation and feedback module 50 then outputs an adjusted frequency-shifted signal to adjust the amplitude and phase of the frequency-shifted signal to meet the preset amplitude and phase range. This allows the amplified frequency-shifted signal to be output, avoiding the problem of excessive power consumption caused by an excessively large amplitude and phase of the frequency-shifted signal, and also avoiding the problem of easy interference when the amplitude and phase of the frequency-shifted signal are too low.

[0048] Optionally, the functions of the main control module 40 can be further optimized, continuing to refer to... Figure 1 The main control module 40 is also used to adjust the track circuit transmission signal according to the amplified frequency shift signal when the track circuit transmission signal received by the signal receiving module 10 does not meet the preset transmission signal, and output the adjusted track circuit transmission signal through the isolation output module 30.

[0049] Specifically, when the track circuit transmission signal received by the signal receiving module 10 does not meet the preset transmission signal,

[0050] The main control module 40 can adjust the track circuit transmission signal and output the adjusted track circuit transmission signal through the isolation output module 30. This avoids the problem of excessive power consumption caused by excessively large amplitude and phase of the track circuit transmission signal, and also avoids the problem of easy interference when the amplitude and phase of the track circuit transmission signal are too low. Specifically, since the trackside track circuit control system in this embodiment integrates the transmitting and receiving equipment in the prior art, the main control module 40 already knows the signal source (i.e., the amplified frequency-shifted signal) when adjusting the track circuit transmission signal. Therefore, it can adjust the track circuit transmission signal according to the amplified frequency-shifted signal, thus enabling precise and effective adjustment of the track circuit transmission signal.

[0051] Optionally, this embodiment provides a more detailed explanation of how to adjust the frequency shift signal; please refer to [reference needed]. Figure 1 The main control module 40 is also used to output adjusted digital encoding information to the signal generation and feedback module so that the signal generation and feedback module outputs an adjusted frequency shift signal when the amplitude and phase of the amplified frequency shift signal do not meet the preset amplitude and phase. This includes: establishing a dynamic model of track impedance; determining the real-time monitoring impedance based on the amplified frequency shift signal; inputting the real-time monitoring impedance to the dynamic model of track impedance to predict the output signal compensation model; and determining the adjusted digital encoding information based on the signal compensation model.

[0052] The frequency shift signal can include a current frequency shift signal and a voltage frequency shift signal; the real-time monitoring impedance can be determined based on the amplified current frequency shift signal and the amplified voltage frequency shift signal; the track impedance dynamic model can characterize different signal compensation models corresponding to different track impedances; in this embodiment, the real-time monitoring impedance is input to the track impedance dynamic model to predict the corresponding signal compensation model. Based on the signal compensation model, the digital encoding information of the compensation can be determined, thereby determining the adjusted digital encoding information, so that the signal generation feedback module outputs the adjusted frequency shift signal, and the amplitude and phase of the adjusted frequency shift signal can meet the preset amplitude and phase.

[0053] Optionally, this embodiment provides a more detailed explanation of how to adjust the track circuit's transmitted signal; please refer to [reference needed]. Figure 1 The main control module 40 adjusts the track circuit transmission signal according to the amplified frequency shift signal when the track circuit transmission signal received by the signal receiving module 10 does not meet the preset transmission signal. This includes: performing digital filtering on the track circuit transmission signal according to the amplified frequency shift signal; performing time-frequency analysis on the filtered track circuit transmission signal to extract signal distortion characteristic parameters; and determining compensation coefficients according to the signal distortion characteristic parameters to adjust the track circuit transmission signal.

[0054] In this embodiment, the frequency of the amplified frequency-shifted signal is used as the frequency of the signal source. The track circuit transmission signal is digitally filtered based on the amplified frequency-shifted signal. This digital filtering can employ an FIR filter bank. The frequency of the amplified frequency-shifted signal is used as the cutoff frequency for digital filtering, thus selectively extracting the effective track circuit transmission signal and avoiding interference from environmental signals. The filtered track circuit transmission signal is then subjected to time-frequency analysis, which can be performed using FFT or wavelet transform, to extract signal distortion characteristic parameters. These parameters include harmonic distortion parameters and imbalance parameters. Compensation coefficients are then determined based on these parameters, and the track circuit transmission signal is compensated accordingly, resulting in an adjusted track circuit transmission signal that meets the preset transmission signal requirements.

[0055] Optionally, based on the above embodiments, the trackside track circuit control system can be further optimized. Figure 2 This is a schematic diagram of another trackside circuit control system provided in an embodiment of the present invention; as shown. Figure 2As shown, the trackside track circuit control system also includes: an auxiliary control module 90; a main control module 40 that is communicatively connected to the auxiliary control module 90; a signal receiving module 10, an isolation input module 20, an isolation output module 30, and a signal generation and feedback module 40 that are also electrically connected to the input terminal of the auxiliary control module 90; the output terminal of the auxiliary control module 90 is connected to the signal generation and feedback module 40; and the feedback terminal of the digital power amplifier module 70 is electrically connected to the auxiliary control module 90.

[0056] The auxiliary control module 90 is used to send the digital coded information input by the isolation input module 20 to the signal generation and feedback module 40; the signal generation and feedback module 40 is also used to convert the digital coded information into a frequency shift signal when the digital coded information sent by the auxiliary control module 90 is the same as the digital coded information sent by the main control module 50, and to feed back the frequency of the frequency shift signal to the auxiliary control module 90.

[0057] The main control module 50 is also used to control the first switching module 60 to turn on when the frequency of the frequency shift signal sent by the auxiliary control module 90 is the same as the frequency of the frequency shift signal fed back by the signal generation feedback module 40, and when the frequency of the frequency shift signal is within a preset frequency range; the digital power amplifier module 70 is also used to amplify the frequency shift signal and feed it back to the auxiliary control module 90.

[0058] The main control module 50 is also used to control the second switching module 80 to turn on so that the amplified frequency shift signal is output when the amplified frequency shift signal sent by the auxiliary control module 90 is the same as the amplified frequency shift signal fed back by the digital power amplifier module 70, and when the amplitude and phase of the amplified frequency shift signal meet the preset amplitude and phase range.

[0059] The auxiliary control module 90 is also used to receive the track circuit transmission signal sent by the signal receiving module 10; and when the track circuit transmission signal sent by the main control module 40 is the same as the track circuit transmission signal sent by the signal receiving module 10, the track circuit transmission signal is output through the isolation output module 30.

[0060] In this embodiment, an auxiliary control module 90 is added to the above embodiment. This provides redundancy between the main control module 40 and the auxiliary control module 90, allowing for information exchange and mutual verification between them, thus improving the reliability of the output signal and control. Specifically, when the digital encoding information sent by the auxiliary control module 90 matches the digital encoding information sent by the main control module 50, the signal generation and feedback module 40 converts the digital encoding information into a frequency-shifted signal and feeds back the frequency of the frequency-shifted signal to the auxiliary control module 90, thereby improving the reliability of the frequency-shifted signal output. When the auxiliary control module 90 sends... The frequency of the frequency-shifted signal is the same as the frequency of the frequency-shifted signal fed back by the signal generation and feedback module 40. When the frequency of the frequency-shifted signal is within a preset frequency range, the first switching module 60 is turned on, thus improving the reliability of the switching control of the first switching module 60. The digital power amplifier module 70 amplifies the frequency-shifted signal and feeds it back to the auxiliary control module 90. Thus, when the amplified frequency-shifted signal sent by the auxiliary control module 90 and the amplified frequency-shifted signal fed back by the digital power amplifier module 70 are the same, and when the amplitude and phase of the amplified frequency-shifted signal meet a preset amplitude and phase range, the main control module 50 controls the second switching module 80 to turn on, thus also improving the reliability of the switching control of the second switching module 80. Furthermore, when the track circuit transmission signal sent by the main control module 40 is the same as the track circuit transmission signal sent by the receiving signal receiving module 10, the auxiliary control module 90 outputs the track circuit transmission signal through the isolation output module 30, thus improving the reliability of the track circuit transmission signal output.

[0061] Optionally, in some embodiments, the frequency shift signal can be adjusted in other ways, as detailed below. Figure 1 and Figure 2 The main control module 40 is also used to output adjusted digital encoding information to the signal generation feedback module when the amplitude and phase of the amplified frequency shift signal do not meet the preset amplitude and phase range, so that the signal generation feedback module outputs the adjusted frequency shift signal. This includes: performing power safety interlocking adjustment on the amplified frequency shift signal to output the adjusted digital encoding information; wherein, the power safety interlocking adjustment includes: threshold power adjustment and power signal compensation adjustment.

[0062] The frequency shift signal includes voltage frequency shift signal and current frequency shift signal; the threshold power adjustment method is to output different power according to different current thresholds, that is, to output different voltages and different currents; the power signal compensation adjustment method is to compensate and adjust the power signal according to different power signals (that is, to determine the power signal according to different voltages and different currents); any power safety lockout adjustment method can be applied to the amplified frequency shift signal to output the adjusted digital code information to the signal generation and feedback module; thus, the signal generation and feedback module outputs the adjusted frequency shift signal, avoiding the problem of excessive power consumption caused by excessive amplitude and phase of the frequency shift signal, and also avoiding the problem of easy interference when the amplitude and phase of the frequency shift signal are too low.

[0063] Optionally, the power signal compensation adjustment method can be further refined, and reference can be continued. Figure 1 and Figure 2 The power signal compensation adjustment method is as follows: determine the power signal based on the amplified frequency-shifted signal; extract the signal distortion characteristic parameters from the power signal; determine the power compensation factor based on the signal distortion characteristic parameters to output the adjusted digital coded information.

[0064] The frequency shift signal includes voltage frequency shift signal and current frequency shift signal. The power signal can be determined based on the amplified voltage frequency shift signal and the amplified current frequency shift signal. Time-frequency analysis is performed on the power signal to extract signal distortion characteristic parameters. The power compensation factor is determined based on the signal distortion characteristic parameters. The adjusted digital encoding information is then output based on the power compensation factor and the power signal, so that the signal generation and feedback module outputs the adjusted frequency shift signal.

[0065] Optionally, the threshold power adjustment method can be further refined, and reference can be continued. Figure 1 and Figure 2 The threshold power adjustment method is as follows: a current threshold level is set for the amplified frequency-shifted signal; and the corresponding power mode is adjusted according to the frequency-shifted signal after the current threshold level is set.

[0066] The frequency shift signal includes a voltage frequency shift signal and a current frequency shift signal. A current threshold level is set for the amplified frequency shift signal, specifically a warning level, a current limiting level, and a fuse level. Then, the power mode is adjusted according to the frequency shift signal after the current threshold level is set. Specifically, when the current threshold level of the frequency shift signal is at the warning level, a slight power reduction (reduction of 10%-15%) is triggered; when the threshold level is at the current limiting level, the power reduction mode is switched to (reduction of 30%-50%); when the threshold level is at the fuse level (120% rated current), the transmission of the digital encoded information of the isolation input module 20 is cut off. Thus, the power mode is adjusted according to the frequency shift signal after the current threshold level is set, ensuring that the adjusted frequency shift signal meets the preset frequency shift signal range.

[0067] It should be noted that the current threshold level can be set based on a historical fault database (scenarios such as rail short circuits and insulation damage) to train a threshold optimization model (using the random forest algorithm) to improve the classification accuracy.

[0068] It should also be noted that during the above threshold power adjustment process, the minimum operating level should be maintained first. This ensures the safety of the frequency shift signal output by maintaining the minimum operating level during power reduction.

[0069] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A trackside circuit control system, characterized in that, include: The signal receiving module, isolated input module, isolated output module, main control module, signal generation and feedback module, first switching module, digital power amplifier module, and second switching module are included. The signal receiving module, the isolated input module, the isolated output module, and the signal generation and feedback module are electrically connected to the input terminal of the main control module; the output terminal of the main control module is electrically connected to the signal generation and feedback module; the signal generation and feedback module is also electrically connected to the input terminal of the digital power amplifier module through the first switching module; the output terminal of the digital power amplifier module is electrically connected to the signal output terminal through the second switching module; and the feedback terminal of the digital power amplifier module is electrically connected to the main control module. The main control module is used to send the digitally encoded information isolated by the isolated input module to the signal generation and feedback module; the signal generation and feedback module is used to convert the digitally encoded information into a frequency-shifted signal and feed back the frequency of the frequency-shifted signal to the main control module. The main control module is used to control the first switching module to turn on so that the signal generation and feedback module outputs the frequency-shifted signal to the digital power amplifier module when the frequency of the frequency-shifted signal is within a preset frequency range; the digital power amplifier module is used to amplify the frequency-shifted signal and feed it back to the main control module. The main control module is further configured to control the second switching module to turn on so that the amplified frequency shift signal is output when the amplitude and phase of the amplified frequency shift signal meet the preset amplitude and phase range; the main control module is further configured to output the track circuit transmission signal received by the signal receiving module through the isolation output module.

2. The trackside circuit control system according to claim 1, characterized in that, The main control module is also used to output adjusted digital encoding information to the signal generation and feedback module when the amplitude and phase of the amplified frequency-shifted signal do not meet the preset amplitude and phase range, so that the signal generation and feedback module outputs the adjusted frequency-shifted signal.

3. The trackside circuit control system according to claim 1, characterized in that, The main control module is also used to adjust the track circuit transmission signal according to the amplified frequency shift signal when the track circuit transmission signal received by the signal receiving module does not meet the preset transmission signal, and output the adjusted track circuit transmission signal through the isolation output module.

4. The trackside circuit control system according to claim 2, characterized in that, The main control module is further configured to output adjusted digital encoding information to the signal generation and feedback module when the amplitude and phase of the amplified frequency-shifted signal do not meet the preset amplitude and phase, so that the signal generation and feedback module outputs the adjusted frequency-shifted signal, including: Establish a dynamic model of track impedance; determine the real-time monitoring impedance based on the amplified frequency-shifted signal; apply a compensation model to the real-time monitoring impedance prediction signal; and determine the compensation adjustment digital coding information based on the signal compensation model.

5. The trackside circuit control system according to claim 3, characterized in that, When the track circuit transmission signal received by the signal receiving module does not meet the preset transmission signal, the track circuit transmission signal is adjusted according to the amplified frequency shift signal, including: The transmitted signal of the track circuit is digitally filtered based on the amplified frequency-shifted signal. The filtered transmitted signal from the track circuit is analyzed in time and frequency to extract signal distortion characteristic parameters. The compensation coefficient is determined based on the signal distortion characteristic parameters to adjust the transmitted signal of the track circuit.

6. The trackside circuit control system according to claim 1, characterized in that, Also includes: Auxiliary control module; the main control module is communicatively connected to the auxiliary control module; The signal receiving module, the isolated input module, the isolated output module, and the signal generation and feedback module are also electrically connected to the input terminal of the auxiliary control module; the output terminal of the auxiliary control module is connected to the signal generation and feedback module; and the feedback terminal of the digital power amplifier module is electrically connected to the auxiliary control module. The auxiliary control module is used to send the digital encoding information input by the isolation input module to the signal generation and feedback module; the signal generation and feedback module is also used to convert the digital encoding information sent by the auxiliary control module into a frequency shift signal when the digital encoding information sent by the auxiliary control module is the same as the digital encoding information sent by the main control module, and to feed back the frequency of the frequency shift signal to the auxiliary control module. The main control module is used to control the first switching module to turn on when the frequency of the frequency-shifting signal sent by the auxiliary control module is the same as the frequency of the frequency-shifting signal fed back by the signal generation and feedback module, and when the frequency of the frequency-shifting signal is within a preset frequency range; the digital power amplifier module is also used to amplify the frequency-shifting signal and feed it back to the auxiliary control module. The main control module is also used to control the second switching module to turn on so that the amplified frequency shift signal is output when the amplified frequency shift signal sent by the auxiliary control module and the amplified frequency shift signal fed back by the digital power amplifier module are the same, and when the amplitude and phase of the amplified frequency shift signal meet the preset amplitude and phase range. The auxiliary control module is also used to receive the track circuit transmission signal sent by the signal receiving module; and when the track circuit transmission signal sent by the main control module is the same as the track circuit transmission signal sent by the signal receiving module, the track circuit transmission signal is output through the isolation output module.

7. The trackside circuit control system according to claim 1, characterized in that, The first switching module includes a first security AND gate; the second switching module includes a second security AND gate.

8. The trackside track circuit control system according to claim 3, characterized in that, The main control module is further configured to adjust the track circuit transmission signal according to the amplified frequency shift signal when the track circuit transmission signal received by the signal receiving module does not meet the preset transmission signal, including: The amplified frequency-shifted signal is subjected to a power safety lockout adjustment method to output the adjusted digital encoded information; wherein, the power safety lockout adjustment method includes: a threshold power adjustment method and a power signal compensation adjustment method.

9. The trackside circuit control system according to claim 8, characterized in that, The threshold power adjustment method is specifically as follows: A current threshold level is set for the amplified frequency-shifted signal; the corresponding power mode is adjusted according to the frequency-shifted signal after the current threshold level is set.

10. The trackside track circuit control system according to claim 8, characterized in that, The power signal compensation and adjustment method is specifically as follows: The power signal is determined based on the amplified frequency-shifted signal; signal distortion feature parameters are extracted from the power signal; and a power compensation factor is determined based on the signal distortion feature parameters to output the adjusted digital encoding information.

Images