Frequency-shifted pulse track circuit, control method and device applied to heavy haul railway

Abstract

The present application relates to the field of rail transit, and provides a frequency-shifted pulse track circuit, a control method and equipment applied to heavy haul railway, the circuit comprising: a first transmitter, a loss redundancy controller, a receiver and a communication module, the first transmitter is used for generating a frequency-shifted pulse mixed signal, and sending the frequency-shifted pulse mixed signal through the steel rail; the loss redundancy controller is used for receiving the frequency-shifted pulse mixed signal, and separating the frequency-shifted pulse mixed signal into a frequency-shifted signal and a pulse signal; the receiver is used for receiving the frequency-shifted signal and the pulse signal, and taking the pulse signal as an occupation check signal of a target section, and is also used for transmitting a driving signal through the communication module based on the occupation check signal to drive the track relay to act. In the process of judging the occupation state, only the pulse signal is taken as the occupation check signal of the target section, which can adapt to the lower ballast resistance condition and the longer track section length of the heavy haul railway, and better meets the application requirement of the heavy haul railway.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, in particular to a frequency-shift pulse track circuit, a control method and equipment applied to heavy haul railway. BACKGROUND

[0002] The frequency-shift pulse track circuit is a circuit composed of a section of railway line steel rail as a conductor, which is used to automatically and continuously detect whether a section of line is occupied by a locomotive vehicle based on pulse and frequency-shift mixed signals, so as to ensure train safety.

[0003] However, the existing frequency-shift pulse track circuit is mainly applied in the station of national passenger dedicated line, and cannot be directly applied to heavy haul railway due to the differences in station structure, length of track section and coding mode between heavy haul railway and passenger dedicated line.

[0004] Therefore, how to construct a frequency-shift pulse circuit that can be applied to heavy haul railway is a technical problem to be solved in the industry. SUMMARY

[0005] The present application provides a frequency-shift pulse track circuit, a control method and equipment applied to heavy haul railway, to solve the defect that the existing mobile pulse track circuit cannot be applied to heavy haul railway.

[0006] In a first aspect, the present application provides a frequency-shift pulse track circuit applied to heavy haul railway, which comprises:

[0007] A first transmitter is connected to one end of the steel rail, and is used to generate a frequency-shift pulse mixed signal and emit the frequency-shift pulse mixed signal through the steel rail;

[0008] A loss redundancy controller is connected to the other end of the steel rail, and is used to receive the frequency-shift pulse mixed signal and separate the frequency-shift pulse mixed signal into a frequency-shift signal and a pulse signal;

[0009] A receiver is connected to the loss redundancy controller, and is used to receive the frequency-shift signal and the pulse signal, and take the pulse signal as an occupation check signal of the target section;

[0010] A communication module is connected to the first transmitter and the receiver at one end, and is connected to a track relay at the other end;

[0011] The receiver is further used to transmit a driving signal through the communication module to drive the track relay to act based on the occupation check signal.

[0012] According to the frequency-shifting pulse track circuit for heavy-haul railways provided by the present invention, the communication module includes a communication interface board and an encoding interface device;

[0013] One end of the communication interface board is connected to the first transmitter and the receiver respectively, and the other end of the communication interface board is connected to the encoding interface device, which is also connected to the track relay.

[0014] The frequency-shifting pulse track circuit for heavy-haul railways provided by the present invention further includes a direction switching circuit, one end of which is connected to the line between the first transmitter and the rail, and the other end of which is connected to the line between the attenuation redundancy controller and the rail.

[0015] The direction switching circuit is used to switch the frequency shift pulse track circuit according to the train's direction of travel.

[0016] The frequency-shifting pulse track circuit for heavy-haul railways provided by the present invention further includes a second transmitter and a switching relay, wherein the second transmitter is connected to the line between the direction switching circuit and the attenuation redundancy controller via the switching relay.

[0017] The frequency-shifting pulse track circuit for heavy-haul railways provided by the present invention further includes a first transformer and a second transformer;

[0018] One end of the first transformer is connected to the first transmitter via a first transmission cable, and the other end of the first transformer is connected to the rail; the first transformer is used to match the impedance relationship between the first transmission cable and the rail.

[0019] One end of the second transformer is connected to the attenuation redundancy controller via a second transmission cable, and the other end of the second transformer is connected to the rail; the second transformer is used to match the impedance of the second transmission cable with the impedance of the rail.

[0020] The frequency-shifting pulse track circuit for heavy-haul railways provided by the present invention further includes a first lightning protection simulation network disk and a second lightning protection simulation network disk;

[0021] The first lightning protection simulation network disk is connected to the line between the first transmitter and the rail, and the second lightning protection simulation network disk is connected to the line between the attenuation redundancy controller and the rail.

[0022] Secondly, the present invention also provides a control method for a frequency-shifting pulse track circuit, the method being based on any of the above-described frequency-shifting pulse track circuits applied to heavy-haul railways, the method comprising:

[0023] acquire the pulse signal;

[0024] if it is determined that the target section is in an occupied state based on the pulse signal, controlling the track relay to drop.

[0025] According to the control method of the frequency-shift pulse track circuit provided by the present application, when the frequency-shift pulse track circuit comprises a second transmitter, the method further comprises:

[0026] acquiring the running direction of the train and the switching state of the frequency-shift pulse track circuit;

[0027] when it is determined that the running direction of the train is changed based on the running direction of the train, and it is determined that the frequency-shift track circuit is not switched based on the switching state of the frequency-shift pulse track circuit, controlling the extinction redundancy controller and the receiver to be disconnected, and controlling the second transmitter to be connected.

[0028] According to the control method of the frequency-shift pulse track circuit provided by the present application, after the extinction redundancy controller and the receiver are controlled to be disconnected, and the second transmitter is controlled to be connected, the method further comprises:

[0029] acquiring the position of the frontmost wheel set of the train;

[0030] when it is determined that the frontmost wheel set of the train leaves the current section based on the position of the frontmost wheel set of the train, controlling the second transmitter to be disconnected, and controlling the extinction redundancy controller and the receiver to be connected.

[0031] In a third aspect, the present application further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the control method of the frequency-shift pulse track circuit according to any one of the above aspects when executing the program.

[0032] The frequency-shift pulse track circuit, control method and device for heavy haul railway provided by the present application can realize the judgment of the occupation state of the target section on the track through the cooperation between the first transmitter, the extinction redundancy controller, the receiver and the communication module. In the process of judging the occupation state, only the pulse signal is used as the occupation checking signal of the target section, which can adapt to the lower ballast resistance condition and longer track section length of the heavy haul railway, and better meet the application requirements of the heavy haul railway. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structural schematic diagram of the frequency-shift pulse track circuit for heavy haul railway provided by the present application;

[0034] Figure 2 is a structural schematic diagram of a frequency-shift pulse track circuit applied to heavy haul railway provided by the present application;

[0035] Figure 3 is a schematic diagram of the receiving and transmitting state of a signal when a train changes driving direction in the prior art in the embodiment of the present application;

[0036] Figure 4 is a schematic diagram of the receiving and transmitting state of a signal when a train changes driving direction after the second transmitter is added in the embodiment of the present application;

[0037] Figure 5 is a flow schematic diagram of a control method of a frequency-shift pulse track circuit provided by the present application;

[0038] Figure 6 is a structural schematic diagram of an electronic device provided by the present application. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some embodiments but not all embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0040] The above and other embodiments of the present application will be described in detail below with reference to the accompanying drawings. Figure 1 to the accompanying drawings Figure 6 The frequency-shift pulse track circuit applied to heavy haul railway, the control method and the device provided by the embodiments of the present application will be described further.

[0041] Figure 1 The frequency-shift pulse track circuit applied to heavy haul railway provided by the embodiments of the present application is shown, which comprises:

[0042] The first transmitter 101 is connected with one end of the steel rail 102, and is used for generating a frequency-shift pulse mixed signal and sending the frequency-shift pulse mixed signal through the steel rail 102.

[0043] The attenuation redundancy controller 103 is connected with the other end of the steel rail 102, and is used for receiving the frequency-shift pulse mixed signal and separating the frequency-shift pulse mixed signal into a frequency-shift signal and a pulse signal.

[0044] The receiver 104 is connected with the attenuation redundancy controller 103, and is used for receiving the frequency-shift signal and the pulse signal and taking the pulse signal as an occupation check signal of a target section.

[0045] The communication module 105 is connected with the first transmitter 101 and the receiver 104 respectively at one end, and connected with the track relay 106 at the other end;

[0046] The receiver 104 is further configured to transmit a driving signal through the communication module 105 to drive the track relay 106 to act based on the occupancy check signal.

[0047] In the embodiment, the first transmitter 101 is the signal source of the entire frequency-shift pulse track circuit, and can generate a mixed signal of pulse and frequency shift, i.e., a frequency-shift pulse mixed signal; the attenuation redundancy controller 103, also known as an attenuation isolator, can adjust the amplitude of the frequency-shift signal and the pulse signal at the receiving end, provide test conditions for signal transmission working indicator lights, power supply voltage, FBJ voltage, and power output voltage, and can provide test conditions for signal receiving working indicator lights and power supply voltage, and realize separation of the frequency-shift signal and the pulse signal in the frequency-shift pulse mixed signal; the receiver 104 can realize feature processing of the frequency-shift signal and the pulse signal, and judge the section idle state and upload track idle or occupancy information; and the communication module can realize interaction between the first transmitter 101 and the receiver 104 and the interlocking system.

[0048] It should be noted that, in the existing frequency-shift pulse track circuit, the frequency-shift signal and the pulse signal are both specified as section occupancy check signals, which can play a double signal guarantee role in occupancy check, but this setting is only suitable for track sections with a minimum ballast resistance of 2Ω·km and a reliable working section length of ≤650m in a passenger special station. After capacity expansion and reconstruction, most of the stations on heavy-haul railways are upgraded to ten-thousand-ton or twenty-thousand-ton stations, and the length of the track section in the station is relatively long. The frequency-shift signal cannot effectively reflect the shunt occupancy of the track circuit after long-distance transmission.

[0049] In order to adapt to the length of the station yard and the length of the track section on heavy-haul railways, in the embodiment, only the pulse signal is used as the section occupancy check signal, i.e., the occupancy check signal of the target section, and the frequency-shift signal is used for broken rail check and transmission of train operation information. In this case, when the target section is in an idle state, the frequency-shift signal and the pulse signal reach the pickup threshold at the same time, and the track relay 106 is controlled to be picked up at this time; when the target section is in an occupied state, the pulse signal reaches the drop threshold, and the track relay 106 is controlled to drop at this time. The above setting scheme of the section occupancy check signal can increase the working length of the frequency-shift pulse track circuit to 1150m.

[0050] In order to verify the effect brought by the improved setting scheme of the section occupancy signal in the embodiment, the following specific data in Table 1 and Table 2 are used for illustration.

[0051] Table 1 The reliable working length of the frequency-shift pulse track circuit provided in the embodiment and applied to heavy-haul lines

[0052]

[0053] Table 2: Existing frequency shift pulse track circuit applied to passenger dedicated line reliable working length

[0054]

[0055] By comparing the data shown in Table 1 and Table 2, it can be seen that, compared with the existing frequency shift pulse track circuit applied to the passenger dedicated line, the frequency shift pulse track circuit applied to the heavy haul railway provided in the embodiment can adapt to the lower ballast resistance condition of the heavy haul railway and can adapt to the longer track section length, because the scheme of using only pulse signals as occupation checking signals is adopted in the frequency shift pulse track circuit applied to the heavy haul railway.

[0056] In the example embodiment, referring to the accompanying drawings, Figure 2 The communication module 105 specifically comprises a communication interface board 201 and a coding interface device 202.

[0057] One end of the communication interface board 201 is connected with the first transmitter 101 and the receiver 104 respectively, and the other end of the communication interface board 201 is connected with the coding interface device 202, and the coding interface device 202 is further connected with the track relay 106.

[0058] Considering that the existing frequency shift pulse track circuit is applicable to the CTCS-2 and CTCS-3 level high-speed railway line station, information interaction with the train control center is carried out through the CAN communication bus, and the communication coding mode is adopted. The heavy haul railway adopts the relay coding mode and does not have a train control system. The existing frequency shift pulse track circuit cannot directly interact with the relay coding condition.

[0059] Therefore, the coding interface device 202 is additionally arranged in the embodiment, so that the conversion between the relay coding and the communication coding can be realized, the state of the track relay 106 can be acquired in real time, the coding of the frequency shift pulse track circuit can be completed, and in the actual application process, the interface information of the interlocking system can be collected by the coding interface device 202 for coding, and the coded information can be transmitted to the first transmitter 101 through the communication interface board 201 for transmission.

[0060] In the example embodiment, the frequency shift pulse track circuit applied to the heavy haul railway provided by the application further comprises a direction switching circuit 203, one end of the direction switching circuit 203 is connected to the line between the first transmitter 101 and the rail 102, and the other end of the direction switching circuit 203 is connected to the line between the attenuation redundancy controller 103 and the rail 102.

[0061] The direction switching circuit 203 is used for switching the frequency shift pulse track circuit according to the driving direction of the train.

[0062] The direction switching circuit 203 in the embodiment can switch the frequency-shift pulse track circuit when the running direction of the train changes, so as to ensure normal data transmission and reception after the running direction of the train changes.

[0063] Further, the frequency-shift pulse track circuit applied to the heavy haul railway provided by the present application can further comprise a second transmitter 204 and a switching relay 211, and the second transmitter 204 is connected to the line between the direction switching circuit 203 and the loss redundancy controller 103 through the switching relay 211.

[0064] Referring to FIG. 1, Figure 3 When the train runs to the right, the right end of the frequency-shift pulse track circuit is the signal sending end, and the left end is the signal receiving end. When the train changes the running direction, and the direction switching circuit 203 in the frequency-shift pulse track circuit has not been switched in time, the receiving coil in front of the train will receive the interference signal coupled from the adjacent section to the current section, which affects the safety of train operation.

[0065] In order to avoid the above problems, the second transmitter 204 is additionally provided at the signal receiving end in the embodiment, referring to FIG. 1, Figure 4 When the train enters the current section, the encoding interface device 202 is used for encoding control, the loss redundancy controller 103 and the receiver 104 are disconnected, and the second transmitter 204 is connected, and the signal is sent through the second transmitter 204.

[0066] When the train signal machine is opened, and the front wheel pair of the locomotive enters the next section from the current section, the encoding interface device 202 is used for encoding control again, the loss redundancy controller 103 and the receiver 104 are connected back to the current section, and the second transmitter 204 is disconnected.

[0067] The second transmitter 204 is additionally provided in the embodiment, and the track circuit double-end encoding mode is adopted, so that the train signal of the current section is greater than the interference signal of the adjacent line, and the train can receive the train signal of the corresponding section directly. When the train changes the running direction and the direction switching circuit has not been switched, the train can still receive the signal of the current section, the problem of adjacent line interference is avoided, and the safety of train operation is improved.

[0068] In the exemplary embodiment, the frequency-shift pulse track circuit applied to the heavy haul railway provided by the present application can further comprise a first transformer 205 and a second transformer 206;

[0069] One end of the first transformer 205 is connected with the first transmitter 101 through the first transmission cable 207, and the other end of the first transformer 205 is connected with the steel rail 102; the first transformer 205 is used for matching the impedance of the first transmission cable 207 and the impedance of the steel rail 102;

[0070] One end of the second transformer 206 is connected with the loss redundancy controller 103 through the second transmission cable 208, and the other end of the second transformer 206 is connected with the steel rail 102; the second transformer 206 is used for matching the relationship between the impedance of the second transmission cable 208 and the impedance of the steel rail 102.

[0071] In the embodiment, the first transformer 205 and the second transformer 206 can both adopt a choke transformer, which is mainly used for realizing the impedance matching connection of the cable and the steel rail line and can provide a return channel of the traction current.

[0072] In the exemplary embodiment, the frequency-shift pulse track circuit applied to the heavy haul railway provided by the application can further comprise a first lightning protection analog network disk 209 and a second lightning protection analog network disk 210.

[0073] The first lightning protection analog network disk 209 is connected on the line between the first transmitter 102 and the steel rail 102, and the second lightning protection analog network disk 210 is connected on the line between the loss redundancy controller 103 and the steel rail 102.

[0074] The first lightning protection analog network disk 209 and the second lightning protection analog network disk 210 are mainly used for compensating the cable and realizing the lightning protection in the horizontal and vertical directions, so as to improve the operation safety of the frequency-shift pulse track circuit.

[0075] In the actual application process, the first transmitter 101 is connected with the steel rail 102 through the first lightning protection analog network disk 209, the first transmission cable 207 and the first transformer 205 in sequence, and the loss redundancy controller 103 is connected with the steel rail 102 through the second lightning protection analog network disk 210, the second transmission cable 208 and the second transformer 206 in sequence.

[0076] The frequency-shift pulse track circuit provided by the embodiment can make the frequency-shift pulse track circuit originally applied to the passenger dedicated railway applicable to the heavy haul railway by taking only the pulse signal as the occupation inspection signal of the target section and by additionally adding the coding interface device and the second transmitter, so as to solve the problem of poor branching of the heavy haul railway.

[0077] The control method of the frequency-shift pulse track circuit provided by the application will be described below. Since the control method of the frequency-shift pulse track circuit provided by the embodiment is based on the frequency-shift pulse track circuit applied to the heavy haul railway, the content about the circuit device in the control method of the frequency-shift pulse track circuit described below can be correspondingly referred to the frequency-shift pulse track circuit applied to the heavy haul railway described above.

[0078] Figure 5The control method of the frequency-shift pulse track circuit is shown, and the method is based on the frequency-shift pulse track circuit applied to the heavy haul railway, and specifically includes the following steps.

[0079] Step 501: obtaining the pulse signal.

[0080] Step 502: if it is determined that the target section is in an occupied state based on the pulse signal, controlling the track relay to drop down.

[0081] The execution subject of the control method of the frequency-shift pulse track circuit provided by the embodiment can be a controller added for realizing the control process, or can be a receiver in the frequency-shift pulse track circuit, and the control process only takes the pulse signal as an occupied checking signal of the target section, and further meets the section length and the minimum ballast resistance condition of the heavy haul railway.

[0082] In the example embodiment, when the frequency-shift pulse track circuit includes the second transmitter, the method can further include the following steps.

[0083] obtaining the running direction of the train and the switching state of the frequency-shift pulse track circuit;

[0084] when it is determined that the running direction of the train is changed based on the running direction of the train, and it is determined that the frequency-shift track circuit is not switched based on the switching state of the frequency-shift pulse track circuit, controlling the attenuation redundancy controller and the receiver to be disconnected, and controlling the second transmitter to be connected.

[0085] The control method provided by the embodiment can further connect the second transmitter when the running direction of the train is changed after the train enters the current section and the direction switching circuit is not switched, so as to ensure the normal transmission and reception of the signal in the current section, avoid the adjacent line interference problem, and improve the reliability of the control process.

[0086] Further, after the attenuation redundancy controller and the receiver are disconnected, and the second transmitter is connected, the method can further include the following steps.

[0087] obtaining the position of the front wheel set of the train;

[0088] when it is determined that the front wheel set of the train leaves the current section based on the position of the front wheel set of the train, controlling the second transmitter to be disconnected, and controlling the attenuation redundancy controller and the receiver to be connected.

[0089] The control method provided by the embodiment can further control the second transmitter to be disconnected, and restore the connection state of the attenuation redundancy controller and the receiver after the front wheel set of the train enters the next section from the current section, so as to ensure the normal transmission and reception of the signal under normal circumstances.

[0090] In summary, the control method for the frequency-shifting pulse track circuit provided by the embodiments of the present invention can make the frequency-shifting pulse track circuit better meet the application requirements of heavy-haul railways, while improving the safety and reliability of train operation.

[0091] Figure 6 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 6 As shown, the electronic device may include a processor 601, a communication interface 602, a memory 603, and a communication bus 604. The processor 601, communication interface 602, and memory 603 communicate with each other via the communication bus 604. The processor 601 can call logic instructions in the memory 603 to execute a control method for the frequency-shifting pulse track circuit. This method includes: acquiring a pulse signal; and if it is determined based on the pulse signal that the target section is occupied, controlling the track relay to drop.

[0092] Furthermore, the logical instructions in the aforementioned memory 603 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0093] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the frequency shift pulse track circuit provided in the above embodiments. The method includes: acquiring a pulse signal; and if it is determined based on the pulse signal that the target section is in an occupied state, controlling the track relay to drop.

[0094] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the control method of the frequency shift pulse track circuit provided in the above embodiments, the method comprising: acquiring a pulse signal; and if it is determined based on the pulse signal that the target section is in an occupied state, controlling the track relay to drop.

[0095] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0096] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0098] The various embodiments in this disclosure are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0099] The scope of protection of this disclosure is not limited to the embodiments described above. Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its scope and spirit. If such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, then the intent of this disclosure also includes such modifications and variations.

Claims

1. A frequency-shifting pulse track circuit for heavy-haul railways, characterized in that, include: A first transmitter is connected to one end of the rail. The first transmitter is used to generate a frequency-shifted pulse mixed signal and transmit the frequency-shifted pulse mixed signal through the rail. A redundancy attenuation controller is connected to the other end of the rail. The redundancy attenuation controller is used to receive the frequency-shifted pulse mixed signal and separate the frequency-shifted pulse mixed signal into a frequency-shifted signal and a pulse signal. A receiver, connected to the attenuation redundancy controller, is used to receive the frequency shift signal and the pulse signal, and to use the pulse signal as an occupancy check signal for the target segment; A communication module, one end of which is connected to the first transmitter and the receiver respectively, and the other end of which is connected to the track relay; The receiver is also used to transmit a drive signal through the communication module based on the occupancy check signal to drive the track relay to operate. The communication module includes a communication interface board and an encoding interface device; one end of the communication interface board is connected to the first transmitter and the receiver respectively, and the other end of the communication interface board is connected to the encoding interface device, which is also connected to the track relay; The frequency-shifting pulse track circuit applied to heavy-haul railways further includes a direction switching circuit, a second transmitter, and a switching relay; one end of the direction switching circuit is connected to the line between the first transmitter and the rail, and the other end is connected to the line between the attenuation redundancy controller and the rail, for switching the frequency-shifting pulse track circuit according to the train's direction of travel; The second transmitter is connected to the line between the direction switching circuit and the attenuation redundancy controller via the switching relay. When the train changes direction but the direction switching circuit has not switched in time, when the train enters the current section, the encoding interface device performs encoding control to disconnect the attenuation redundancy controller and the receiver via the switching relay, and connect the second transmitter to send a signal. When the train signal opens and the leading wheelset of the train leaves the current section and enters the next section, the encoding interface device performs encoding control again to connect the attenuation redundancy controller and the receiver back to the current section via the switching relay, and disconnect the second transmitter.

2. The frequency-shifting pulse track circuit for heavy-haul railways according to claim 1, characterized in that, It also includes the first transformer and the second transformer; One end of the first transformer is connected to the first transmitter via a first transmission cable, and the other end of the first transformer is connected to the rail; the first transformer is used to match the impedance relationship between the first transmission cable and the rail. One end of the second transformer is connected to the attenuation redundancy controller via a second transmission cable, and the other end of the second transformer is connected to the rail. The second transformer is used to match the impedance of the second transmission cable with the impedance of the rail.

3. The frequency-shifting pulse track circuit for heavy-haul railways according to claim 1, characterized in that, It also includes a first lightning protection simulated network disk and a second lightning protection simulated network disk; The first lightning protection simulation network disk is connected to the line between the first transmitter and the rail, and the second lightning protection simulation network disk is connected to the line between the attenuation redundancy controller and the rail.

4. A control method for a frequency-shifting pulse track circuit, characterized in that, The method is based on the frequency-shift pulse track circuit applied to heavy-haul railways as described in any one of claims 1 to 3, and the method includes: Acquire the pulse signal; If the target section is determined to be occupied based on the pulse signal, the track relay is controlled to drop.

5. The control method for the frequency-shifting pulse track circuit according to claim 4, characterized in that, When the frequency-shift pulse track circuit includes a second transmitter, the method further includes: Obtain the train's direction of travel and the switching status of the frequency-shifting pulse track circuit; When it is determined that the train's direction of travel has changed based on the train's direction of travel, and it is determined that the frequency-shift pulse track circuit has not switched based on the switching status of the frequency-shift pulse track circuit, the attenuation redundancy controller and the receiver are disconnected, and the second transmitter is turned on.

6. The control method for the frequency-shifting pulse track circuit according to claim 5, characterized in that, After disconnecting the attenuation redundancy controller and the receiver, and turning on the second transmitter, the method further includes: Obtain the position of the frontmost wheelset of the train; When it is determined, based on the position of the frontmost wheelset of the train, that the frontmost wheelset of the train has left the current section, the second transmitter is disconnected, and the attenuation redundancy controller and the receiver are connected.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the control method for the frequency shift pulse track circuit as described in any one of claims 4 to 6.

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