CN115402374A - Track circuit system for detecting use state of track section - Google Patents
Track circuit system for detecting use state of track section Download PDFInfo
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- CN115402374A CN115402374A CN202211231599.0A CN202211231599A CN115402374A CN 115402374 A CN115402374 A CN 115402374A CN 202211231599 A CN202211231599 A CN 202211231599A CN 115402374 A CN115402374 A CN 115402374A
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- 238000002955 isolation Methods 0.000 claims abstract description 275
- 230000003137 locomotive effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 101000879675 Streptomyces lavendulae Subtilisin inhibitor-like protein 4 Proteins 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
- B61L1/18—Railway track circuits
- B61L1/181—Details
- B61L1/187—Use of alternating current
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
- B61L1/16—Devices for counting axles; Devices for counting vehicles
- B61L1/163—Detection devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
- B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
Abstract
The application provides a track circuit system for detecting the use state of a track section, which comprises: the system comprises an indoor transformer, a track relay, an axle counting indoor host, two isolation units, two axle counting outdoor devices and a remote power supply for supplying power to the axle counting outdoor devices. The axle counting indoor host machine obtains the axle counting numbers of the two axle counting outdoor devices through the two isolation units, and compares the axle counting numbers of the two axle counting outdoor devices to obtain a comparison result. The indoor transformer transmits a track circuit signal to the track relay through the two isolation units and the target track section to be detected. And indicating the use state of the target track section by the working state of the track relay and the comparison result. The system comprehensively utilizes the number of the axle counting provided by the axle counting outdoor device and the original track circuit signal to detect the use state of the target track section, solves the problem that the detection result is inaccurate due to the interference of the track circuit signal by the environment where the target track section is located, and improves the accuracy of detecting the use state of the target track section.
Description
Technical Field
The invention relates to the technical field of track circuits, in particular to a track circuit system for detecting the use state of a track section.
Background
In order to implement train scheduling, it is necessary to detect the use status of each track segment, that is, detect whether a train is running on a specific track segment (i.e., a specific section of track) at the current time, if so, the use status of the track segment is occupied, and if not, the use status of the track segment is idle.
In a conventional detection method, signal transceiving devices are respectively disposed at two ends of a track section, a device at one end outputs a track circuit signal (generally, the frequency is 25 Hz) on a track, and a device at the other end collects the track circuit signal from the track, and determines the use state of the track according to the collected track circuit signal.
The method has the problems that the detection result is easily influenced by the environment of the track section, for example, when more coal dust is accumulated on the track section, the track circuit signal transmitted by the track has the problems of poor shunting and track bed leakage, and the use state detected according to the track circuit signal is inaccurate.
Disclosure of Invention
In view of the above drawbacks of the prior art, the present invention provides a track circuit system for detecting a usage status of a track section, so as to provide a solution for detecting the usage status of the track section with higher accuracy.
The application provides a track circuit system for detecting the use state of a track section, which comprises: the system comprises an indoor transformer, a track relay, an axle counting indoor host, two isolation units, two axle counting outdoor devices and a remote power supply for supplying power to the two axle counting outdoor devices, wherein each isolation unit comprises an indoor isolation box and an outdoor isolation box which are connected with each other;
in the two isolation units, an indoor isolation box of a first isolation unit is connected with the indoor transformer, the remote power supply and the axle counting indoor host, and an outdoor isolation box of the first isolation unit is connected with a first axle counting outdoor device in the two axle counting outdoor devices and one end of a target track section to be detected;
in the two isolation units, an indoor isolation box of a second isolation unit is connected with the track relay, the remote power supply and the axle counting indoor host, and an outdoor isolation box of the second isolation unit is connected with a second axle counting outdoor device in the two axle counting outdoor devices and the other end of the target track section;
the indoor transformer outputs a track circuit signal on the target track section through the first isolation unit, and the track relay obtains the track circuit signal from the target track section through the second isolation unit;
the first axle counting outdoor device and the second axle counting outdoor device are respectively arranged at two ends of the target track section;
the axle counting indoor host is used for comparing the axle counting number of the first axle counting outdoor device with the axle counting number of the second axle counting outdoor device to obtain a comparison result;
and the working state of the track relay and the comparison result are both used for indicating the use state of the target track section.
Optionally, when the working state of the track relay is a release state, or the comparison result is unequal, the use state of the target track section is occupied;
and the working state of the track relay is a suction state, or when the comparison result is equal, the use state of the target track section is idle.
Optionally, the indoor isolation box of the second isolation unit is connected to the track relay through a protection box.
Optionally, a lightning protection module is connected between the indoor isolation box and the outdoor isolation box of each isolation unit;
and a lightning protection module is arranged between the outdoor isolation box of each isolation unit and the target track section.
Optionally, each of the isolation units further includes a track transformer, the track transformer is connected to an outdoor isolation box of the isolation unit, and the track transformer is configured to transform a track circuit signal passing through the outdoor isolation box.
Optionally, the axle counting indoor host is further configured to zero the axle counting number of the first axle counting outdoor device and the axle counting number of the second axle counting outdoor device.
Optionally, the system further includes a frequency shift sending box, where the frequency shift sending box is connected to the indoor isolation boxes of the two isolation units respectively;
and the frequency shift sending box is used for sending a frequency shift locomotive signal to the train running on the target track section through the first isolation unit or the second isolation unit.
Optionally, in each isolation unit, each of the outdoor isolation box and the indoor isolation box includes a comprehensive signal interface, an axle counting interface, a track interface, and a frequency shift interface, an axle counting isolation circuit is disposed between the comprehensive signal interface and the axle counting interface, a track isolation circuit is disposed between the comprehensive signal interface and the track interface, and a frequency shift isolation circuit is disposed between the comprehensive signal interface and the frequency shift interface;
in the first isolation unit, a comprehensive signal interface of the outdoor isolation box is connected with a comprehensive signal interface of the indoor isolation box;
the axle counting interface of the outdoor isolation box is connected with the first axle counting outdoor device, and the track interface and the frequency shift interface are connected to the target track section;
the axle counting interface of the indoor isolation box is connected with the axle counting indoor host and the remote power supply, the track interface is connected with the indoor transformer, and the frequency shift interface is connected with the frequency shift sending box;
in the second isolation unit, a comprehensive signal interface of the outdoor isolation box is connected with a comprehensive signal interface of the indoor isolation box;
the axle counting interface of the outdoor isolation box is connected with the second axle counting outdoor device, and the track interface and the frequency shift interface are connected to the target track section;
the axle counting interface of the indoor isolation box is connected with the axle counting indoor host and the remote power supply, the track interface is connected with the track relay, and the frequency shift interface is connected with the frequency shift sending box.
Optionally, the axle counting interface includes an axle counting signal interface for transmitting an axle counting signal, and an axle counting driving interface for transmitting an axle counting driving current;
the axle counting signals comprise signals sent by the axle counting outdoor device to the axle counting indoor host machine and signals sent by the axle counting indoor host machine to the axle counting outdoor device.
The application provides a track circuit system for detecting the use state of a track section, which comprises: the system comprises an indoor transformer, a track relay, an axle counting indoor host, two isolation units, two axle counting outdoor devices and a remote power supply for supplying power to the two axle counting outdoor devices, wherein each isolation unit comprises an indoor isolation box and an outdoor isolation box which are connected with each other; in the two isolation units, an indoor isolation box of the first isolation unit is connected with an indoor transformer, a remote power supply and an axle counting indoor host, and an outdoor isolation box of the first isolation unit is connected with a first axle counting outdoor device in the two axle counting outdoor devices and one end of a target track section to be detected. In the two isolation units, an indoor isolation box of the second isolation unit is connected with the track relay, the remote power supply and the axle counting indoor host, and an outdoor isolation box of the second isolation unit is connected with a second axle counting outdoor device in the two axle counting outdoor devices and the other end of the target track section. The indoor transformer outputs a track circuit signal on the target track section through the first isolation unit, and the track relay obtains the track circuit signal from the target track section through the second isolation unit. The first axle counting outdoor device and the second axle counting outdoor device are respectively arranged at two ends of the target track section. The axle counting indoor host is used for comparing the axle counting number of the first axle counting outdoor device with the axle counting number of the second axle counting outdoor device to obtain a comparison result. And the working state and the comparison result of the track relay are both used for indicating the use state of the target track section. The system comprehensively utilizes the number of the axle counting provided by the axle counting outdoor device and the original track circuit signal to detect the use state of the target track section, solves the problem that the detection result is inaccurate due to the interference of the track circuit signal by the environment where the target track section is located, and improves the accuracy of detecting the use state of the target track section.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a conventional track circuit system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a track circuit system for detecting a use status of a track segment according to an embodiment of the present application;
fig. 3 is a schematic circuit structure diagram of an isolation unit according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some of the terms that may be referred to in this application are briefly described below.
Railway signal equipment: the railway signal equipment mainly comprises a track circuit, computer linkage, a shaft meter, an LEU, vehicle-mounted equipment, a transponder, microcomputer monitoring and the like.
The axle counting device comprises: the safety device for checking the occupation of the track section is used for judging the state of the section according to the number of wheels checked by a sensor arranged at the entrance and the exit of the section, so that the function is independent of the track bed environment. Generally, the axle counting device can be divided into an axle counting outdoor unit and an axle counting indoor host, wherein the axle counting outdoor unit is used for detecting the number of wheels passing through a specific position on a track in real time to obtain a corresponding axle counting number, and the axle counting indoor host is used for collecting and analyzing the axle counting number detected by the axle counting outdoor unit and controlling the axle counting outdoor unit.
Coding: the general term of the technology for transmitting or superposing locomotive signal information by a track circuit.
Superposition coding: coding is carried out after the train enters the section.
In order to facilitate understanding of the solution provided by the present application, first, the structure of the existing track circuit system and the principle of detecting the use status of a specific section of track (referred to as a target track section in the present application) are described with reference to fig. 1.
Fig. 1 is a schematic structural diagram of a conventional track circuit system according to an embodiment of the present disclosure.
The existing track circuit system comprises an indoor transformer 101, a track relay 102, a frequency shift transmission box 103 and two isolation units. For convenience of explanation, the two isolation units are respectively referred to as a first isolation unit 104 and a second isolation unit 105.
The first isolation unit 104 and the second isolation unit 105 are respectively connected to both ends of the target track section 100 whose use state needs to be detected.
In addition to the above-mentioned main components, the track circuit system may further comprise a lightning protection module 106 arranged between the isolation unit and the target track section, and a lightning protection module 107 arranged inside the isolation unit, in particular between the indoor isolation box and the outdoor isolation box of the isolation unit.
The indoor isolation box inside the isolation unit is used for isolating the frequency shift voltage signal and the track circuit signal and enabling the mutual interference of the frequency shift voltage signal and the track circuit signal to reach an allowable value; and the outdoor isolation box is used for providing different paths for the frequency shift voltage signal and the track circuit information and separating the frequency shift voltage signal from the track circuit signal. Specifically, when the track circuit system works, a track circuit signal can be generated by an indoor transformer at one end of a target track section and then transmitted to a track relay through the first isolation unit, the rail and the second isolation unit, and a frequency shift voltage signal can be generated by the frequency shift sending box and sent to the track through the first isolation unit and the second isolation unit and then transmitted to a train running on the track through the track.
It can be seen that there are two lightning protection modules 106 and 107, where the model of the lightning protection module 106 may be WFL and the model of the lightning protection module 107 may be NFL. Of course, in other alternative embodiments, the lightning protection modules 106 and 107 may also be of other types, without limitation.
Optionally, an adjustable resistor 131 may be disposed between the frequency shift transmitter box and the two isolation units.
Optionally, the indoor transformer 101 may be a BMT-25 type transformer, or may also be a transformer of another type, which is not limited in this embodiment.
The input to the frequency shift transmitter box is the frequency shift code 132 that needs to be transmitted to the train operating on the target track segment.
Between the second isolation unit 105 and the rail relay 102, a guard box 108 may be provided. The type of the protective cassette 108 may be selected based on the actual situation, and the protective cassette 108 may be, for example, an HF3-25 type protective cassette. In some alternative embodiments, the protective case 108 may not be provided. The provision of the guard box 108 serves to improve the reliability of the system.
The track relay can be a binary two-position track relay.
In this embodiment, the first isolation unit and the second isolation unit have the same circuit structure, and the specific circuit structure of the isolation unit is not limited in this embodiment.
The operation of the conventional track circuit system will be described with reference to fig. 1.
The input of the frequency shift sending box is a frequency shift code 132, and after the frequency shift sending box obtains the frequency shift code, a high-frequency stable frequency shift voltage signal is generated according to the frequency shift code. The frequency-shifted voltage signal may be understood as a voltage signal whose frequency changes with time, and in this embodiment, the frequency-shifted transmitter may perform frequency modulation processing on one or more of the 8 carrier frequency signals sequentially by using at most 18 low-frequency signals according to the frequency-shifted code, so as to obtain the frequency-shifted voltage signal carrying the frequency-shifted code.
The frequency-shifting voltage signal generated by the frequency-shifting transmission box can be transmitted to the track through the first isolation unit or the second isolation unit. The train running on the railway is provided with a receiving device for receiving the frequency shift voltage signal, so that the train can obtain the frequency shift voltage signal from the track and then obtain the frequency shift code carried by the frequency shift voltage signal by demodulating the frequency shift voltage signal.
By the mode, the track circuit system can send the frequency shift code for controlling the train to run like a train running on the track, and the train running is controlled and scheduled.
The input of the indoor transformer is 25Hz and 220V alternating current power supply, 220V alternating current is reduced by the indoor transformer to form 25Hz track circuit signals, and the track circuit signals are superposed with the frequency shift voltage signals and output to the track after passing through the first isolation unit.
Unlike the frequency shifted voltage signal, the track circuit signal is transmitted through the track to the second isolation unit, and then through the second isolation unit to the track relay, and specifically to the track coil of the track relay (which refers to a coil electrically connected to the track through the second isolation unit).
The track relay is a binary two-position track relay comprising a track coil and a local coil, and when a track circuit system works, the local coil is connected with external alternating current, particularly a 25Hz,110V alternating current power supply.
When no train runs on the target track section, the track circuit signal transmitted to the track coil through the target track section meets a specific phase and frequency, so that the track relay is in an attraction state, which indicates that the target track section has no train, i.e. the use state is idle.
When a train is running on the target track section, the track circuit signal transmitted to the track coil through the target track section does not satisfy a specific phase and frequency, and therefore the track relay is in a release state, indicating that the target track section has a train, i.e., the use state is occupied.
It can be seen that in the system shown in fig. 1, whether there is a vehicle or no vehicle in the target track section is determined only according to the track circuit signal transmitted on the target track section, and the track circuit signal directly transmitted through the target track section is easily interfered by the environment (especially when the environment is too dusty), so that the accuracy of the scheme for detecting the use state of the track is low.
On the basis of the existing track circuit system shown in fig. 1, an axle counting device is additionally introduced in the embodiment of the present application, and is used for real-timely counting the number of axles at two ends of a target track section, and detecting the use state of the target track section according to the number of axles, so that the accuracy of a detection result is improved.
Fig. 2 is a schematic structural diagram of an improved track circuit system for detecting a use status of a track segment according to an embodiment of the present application.
It can be seen that, in the track circuit system provided in the embodiment of the present application, in addition to the existing components in the system shown in fig. 1, the track circuit system further includes two axle counting outdoor units, which are respectively denoted as a first axle counting outdoor unit 201 and a second axle counting outdoor unit 202, a remote power supply 203 for supplying power to the two axle counting outdoor units, and an axle counting indoor main unit 204 connected to the axle counting outdoor unit through an isolation unit.
In the embodiment shown in fig. 2, two remote power supplies 203 are provided to supply power to the two axle counting outdoor units. In some alternative embodiments, only one remote power supply may be provided in the system to simultaneously supply power to both of the outside axle counting devices.
In fig. 2, except for the first and second axle counting outdoor devices 201 and 202, the remote power supply 203, and the axle counting indoor main unit 204, functions of other components and operating principles in the track circuit system are as described in the embodiment corresponding to fig. 1, and are not repeated.
In the system shown in fig. 2, the indoor isolation box of the first isolation unit is connected with the indoor transformer, the remote power supply and the axle counting indoor host, and the outdoor isolation box of the first isolation unit is connected with the first axle counting outdoor device of the two axle counting outdoor devices and one end of the target track section to be detected.
The indoor isolation box of the second isolation unit is connected with the track relay, the remote power supply and the axle counting indoor host, and the outdoor isolation box of the second isolation unit is connected with the second axle counting outdoor device in the two axle counting outdoor devices and the other end of the target track section.
Each axle counting outdoor device comprises at least one axle counting sensor, and the axle counting sensors are arranged on the track and used for detecting the number of train wheels passing through the axle counting sensors in real time. Through the axle counting sensor, the axle counting outdoor unit can obtain the number of the wheels passing through the position of the axle counting sensor from the last zero clearing, namely, the axle counting number.
In the system provided in this embodiment, the first axle counting outdoor unit and the second axle counting outdoor unit are respectively disposed at two ends of the target track section, so that the number of axles obtained by the first axle counting outdoor unit represents the number of wheels accumulated to pass through one end of the target track section, and the number of axles obtained by the second axle counting outdoor unit represents the number of wheels accumulated to pass through the other end of the target track section.
The first axle counting outdoor device and the second axle counting outdoor device can send axle counting signals carrying the counted axle counting number to the axle counting indoor host in real time according to a certain period, or send the axle counting signals carrying the counted axle counting number to the axle counting indoor host every time the axle counting number changes, so that the axle counting indoor host can obtain the axle counting numbers at two ends of a target track section.
The axle counting indoor host is used for comparing the axle counting number of the first axle counting outdoor device with the axle counting number of the second axle counting outdoor device to obtain a comparison result.
For a specific section of track, if the number of the wheels accumulated to enter the section of track is equal to the number of the wheels accumulated to leave the section of track by a certain time, the section of track at the current time can be considered to have no train, and if the number of the wheels accumulated to enter the section of track is not equal to the number of the wheels accumulated to leave the section of track, the section of track at the current time can be considered to have a train running.
Therefore, in this embodiment, the track circuit system may combine the operating status of the track relay in the embodiment corresponding to fig. 1 and the comparison result of the axle counting indoor host to indicate the usage status of the target track segment.
Specifically, the correspondence between the working state of the track relay, the comparison result of the axle counting indoor host, and the use state of the target track section may be:
and when the working state of the track relay is a release state or the comparison result is unequal, the use state of the target track section is occupied, namely the target track section has a train running at the moment.
The working state of the track relay is in a suction state, or when the comparison result is equal, the use state of the target track section is idle, namely no train runs in the target track section at the moment.
Optionally, the axle counting indoor host may be further configured to zero the axle counting number of the first axle counting outdoor device and the axle counting number of the second axle counting outdoor device.
The axle counting indoor host machine can control the first axle counting outdoor device and the second axle counting outdoor device to be reset every time a preset cleaning period passes.
Or, the axle counting indoor host can control the two axle counting outdoor devices to zero when the axle counting numbers counted by the two axle counting outdoor devices are both greater than or equal to the set axle counting number threshold.
The method for controlling the zero clearing of the axle counting outdoor device by the axle counting indoor host machine can be that the axle counting indoor host machine sends an axle counting signal carrying a zero clearing instruction to the axle counting outdoor device, and the axle counting outdoor device clears the currently counted axle counting number after receiving the axle counting signal and restarts accumulating the axle counting number.
As an example, please refer to fig. 3, which is a schematic circuit structure diagram of an isolation unit according to an embodiment of the present application, and each of the first isolation unit and the second isolation unit shown in fig. 1 and fig. 2 may have a circuit structure shown in fig. 3.
The isolation unit comprises an indoor isolation box 301, an outdoor isolation box 302, a track transformer 303, and the lightning protection module 107 shown in fig. 1, which is arranged between the indoor isolation box and the outdoor isolation box.
The lightning protection module 107 is an optional module, the track circuit system may not be provided with the lightning protection module 107 in some optional embodiments, and the lightning protection module 107 is provided to improve the reliability of the system and prevent the system from being frequently damaged due to weather interference.
The track transformer is connected with the outdoor isolation box of the isolation unit and is used for transforming track circuit signals passing through the outdoor isolation box.
Optionally, the track transformer may be a BG2-130/25 type transformer, or may be another type transformer, which is not limited in this embodiment.
The indoor isolation box comprises a comprehensive signal interface, a shaft counting interface, a frequency shift interface and a track interface.
The track interface of the indoor isolation box consists of contacts A1 and A2, the frequency shift interface consists of contacts B1 and B2, the comprehensive signal interface consists of contacts D1 and D2, and the axle counting interface consists of contacts E1 to E3.
The outdoor isolation box also comprises a comprehensive signal interface, a shaft counting interface, a frequency shift interface and a track interface.
The track interface of the outdoor isolation box consists of contacts A1 'and A2', the frequency shift interface consists of contacts B1 'and B2', the comprehensive signal interface consists of contacts D1 'and D2', and the axis counting interface consists of contacts E1 'to E3'.
Particularly, E1 and E2 of the indoor isolation box form an axle counting driving interface used for transmitting axle counting driving current from a remote power supply to an axle counting outdoor device, and E1 and E3 form an axle counting signal interface used for transmitting axle counting signals. That is, E1 and E2 of the indoor isolation box are connected with a remote power supply; e1 and E3 of the indoor isolation box are connected with the axle counting indoor host.
Meanwhile, E1 'to E3' of the outdoor isolation box are connected with corresponding axle counting outdoor devices.
Further, the indoor isolation box 301 includes an axis-counting isolation circuit 311 disposed between the integrated signal interface and the axis-counting interface, a track isolation circuit 312 disposed between the integrated signal interface and the track interface, and a frequency-shift isolation circuit 313 disposed between the integrated signal interface and the frequency-shift interface.
The outdoor isolation box 302 also includes an axle counting isolation circuit 321 disposed between the integrated signal interface and the axle counting interface, a track isolation circuit 322 disposed between the integrated signal interface and the track interface, and a frequency shift isolation circuit 323 disposed between the integrated signal interface and the frequency shift interface.
The connection relationship of the interfaces of the first isolation unit is as follows:
in the first isolation unit, a comprehensive signal interface of the outdoor isolation box is connected with a comprehensive signal interface of the indoor isolation box;
the axle counting interface of the outdoor isolation box is connected with a first axle counting outdoor device, and the track interface and the frequency shift interface are both connected to a target track section;
the axle counting interface of the indoor isolation box is connected with the axle counting indoor host and the remote power supply, the track interface is connected with the indoor transformer, and the frequency shift interface is connected with the frequency shift sending box.
The connection relationship of the interfaces of the second isolation unit is as follows:
in the second isolation unit, the comprehensive signal interface of the outdoor isolation box is connected with the comprehensive signal interface of the indoor isolation box;
the axle counting interface of the outdoor isolation box is connected with a second axle counting outdoor device, and the track interface and the frequency shift interface are both connected to a target track section;
the axle counting interface of the indoor isolation box is connected with the axle counting indoor host and the remote power supply, the track interface is connected with the track relay, and the frequency shift interface is connected with the frequency shift sending box.
In some optional embodiments, when the isolation unit comprises a track transformer, the track interfaces of the first isolation unit and the second isolation unit are connected to the track transformer first, and then connected to the rail through the track transformer.
In the outdoor isolation box and the indoor isolation box, the isolation circuits with the same name have the same specific structure and function.
Referring to fig. 3, the following takes an indoor isolation box as an example to specifically describe the structures and functions of the isolation circuits.
In the axle counting isolation circuit, C4 (C represents capacitance, the same below) and L3 (L represents inductance, the same below) can form a parallel resonance circuit to generate pole impedance, and 25Hz track circuit signals are prevented from being transmitted to an axle counting system, namely to an axle counting outdoor device or an axle counting indoor host. The L4 and the C5 form a parallel resonance circuit to generate pole impedance, so that the frequency shift voltage signal is prevented from being transmitted to the axle counting system.
In the track isolation circuit, C2 is used to protect a 25Hz track circuit system and prevent the axle counting driving current outputted by the remote power supply from entering the original track circuit system (i.e. the system shown in fig. 1). L1 and C2 are used primarily to protect the 25Hz track circuitry from the entry of the axle count signals.
In the frequency shift isolation circuit, C3 mainly has the function of protecting a 25Hz track circuit system from the entering of a counting shaft driving current. L2 is mainly used for protecting 25Hz track circuit system from entering a counting shaft signal.
The transmission paths of various signals in the system of the present embodiment are described below with reference to fig. 3.
And (4) frequency shift signals. After the frequency shift signal is generated in the frequency shift sending box, the frequency shift signal enters the indoor isolation box of the first isolation unit through a frequency shift interface formed by the contacts B1 and B2 in the figure 3, then reaches the outdoor isolation box through a frequency shift isolation circuit and a comprehensive signal interface of the indoor isolation box, and finally reaches the frequency shift interface of the outdoor isolation box, namely the contacts B1 'and B2', through the frequency shift isolation circuit of the outdoor isolation box, and is transmitted to a track. The transmission paths of the frequency shift signals in the second isolation unit are the same, and are not described again.
Track circuit signals. After the indoor transformer generates a track circuit signal, the track circuit signal enters an indoor isolation box of the first isolation unit from a track interface formed by the A1 and the A2; the signal is transmitted to an outdoor isolation box of the first isolation unit through a comprehensive signal interface of the track isolation circuit and the first isolation unit; then, the signal of the track circuit is transmitted to the track through the track isolation circuit of the outdoor isolation box and the track transformer of the first isolation unit.
At the second isolation unit, the track circuit signal enters the outdoor isolation box of the second isolation unit from the track through the frequency shift interface of the outdoor isolation box of the second isolation unit (namely, the contacts B1 'and B2' of the outdoor isolation box); then the signals pass through a track transformer of the second isolation unit, a track isolation circuit of an outdoor isolation box of the second isolation unit, a comprehensive signal interface of the outdoor isolation box of the second isolation unit, a track isolation circuit of an indoor isolation box of the second isolation unit one by one and reach a track interface of the indoor isolation box of the second isolation unit, namely reach contacts A1 and A2 of the second isolation unit; finally, the A1 and A2 contacts of the second isolation unit enter the protective box 108, pass through the protective box 108, and then reach the track coil of the track relay 102.
In an axle counting system, there is an axle counting signal and an axle counting drive current.
The axle counting driving current is output from a remote power supply, enters the indoor isolation box through E1 and E2 contacts in an axle counting interface of the indoor isolation box, then sequentially passes through a frequency shift isolation circuit of the indoor isolation box, a comprehensive signal interface of the indoor isolation box, a frequency shift isolation circuit of the outdoor isolation box and E1 'and E2' contacts of the outdoor isolation box to reach the corresponding axle counting outdoor device, and therefore the axle counting outdoor device is driven to work.
The axle counting signal can be sent to the axle counting indoor host by the axle counting outdoor device (such as the axle counting signal with the axle counting number), or sent to the axle counting outdoor device by the axle counting indoor host (such as the axle counting signal with the control command), wherein the transmission path of the axle counting signal generated by the axle counting outdoor device enters the outdoor isolation box through E1 'and E3' contacts of the outdoor isolation box and then sequentially passes through the frequency shift isolation circuit of the outdoor isolation box, the comprehensive signal interface of the outdoor isolation box, the frequency shift isolation circuit of the indoor isolation box and the E1 and E3 contacts of the indoor isolation box to reach the axle counting indoor host. The transmission path of the latter, that is, the transmission path of the axle counting signal sent by the axle counting indoor host to the axle counting outdoor device, is the opposite path of the former transmission path, and is not described again.
The transmission paths of the axle counting driving current and the axle counting signal are the same in the first isolation unit and the second isolation unit.
The advantage of this embodiment is.
The application provides a track circuit system for detecting the use state of a track section, which comprises: the system comprises an indoor transformer, a track relay, an axle counting indoor host, two isolation units, two axle counting outdoor devices and a remote power supply for supplying power to the two axle counting outdoor devices, wherein each isolation unit comprises an indoor isolation box and an outdoor isolation box which are connected with each other; in the two isolation units, an indoor isolation box of the first isolation unit is connected with an indoor transformer, a remote power supply and an axle counting indoor host, and an outdoor isolation box of the first isolation unit is connected with a first axle counting outdoor device in the two axle counting outdoor devices and one end of a target track section to be detected. In the two isolation units, an indoor isolation box of the second isolation unit is connected with the track relay, the remote power supply and the axle counting indoor host, and an outdoor isolation box of the second isolation unit is connected with a second axle counting outdoor device in the two axle counting outdoor devices and the other end of the target track section. The indoor transformer outputs a track circuit signal on the target track section through the first isolation unit, and the track relay obtains the track circuit signal from the target track section through the second isolation unit. The first axle counting outdoor device and the second axle counting outdoor device are respectively arranged at two ends of the target track section. The axle counting indoor host is used for comparing the axle counting number of the first axle counting outdoor device with the axle counting number of the second axle counting outdoor device to obtain a comparison result. And the working state and the comparison result of the track relay are both used for indicating the use state of the target track section. The system comprehensively utilizes the number of the axle counting provided by the axle counting outdoor device and the original track circuit signal to detect the use state of the target track section, solves the problem that the detection result is inaccurate due to the interference of the track circuit signal by the environment where the target track section is located, and improves the accuracy of detecting the use state of the target track section.
Further, the design of the scheme provided by the embodiment meets the fourth level of safety integrity level, namely the requirement of SIL4, and the practicability is strong; in the embodiment, the isolation circuit is designed, so that various signals are superposed and output, the laying of cables is avoided, the construction difficulty is reduced, the field problem is overcome, and great economic benefits are achieved; the isolation circuit in the embodiment has the advantages of simple and reliable design, strong practicability and strong portability.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.
Those skilled in the art can make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. Track circuit system for detecting the use status of a track section, comprising: the system comprises an indoor transformer, a track relay, an axle counting indoor host, two isolation units, two axle counting outdoor devices and a remote power supply for supplying power to the two axle counting outdoor devices, wherein each isolation unit comprises an indoor isolation box and an outdoor isolation box which are connected with each other;
in the two isolation units, an indoor isolation box of a first isolation unit is connected with the indoor transformer, the remote power supply and the axle counting indoor host, and an outdoor isolation box of the first isolation unit is connected with a first axle counting outdoor device in the two axle counting outdoor devices and one end of a target track section to be detected;
in the two isolation units, an indoor isolation box of a second isolation unit is connected with the track relay, the remote power supply and the axle counting indoor host, and an outdoor isolation box of the second isolation unit is connected with a second axle counting outdoor device in the two axle counting outdoor devices and the other end of the target track section;
the indoor transformer outputs a track circuit signal on the target track section through the first isolation unit, and the track relay obtains the track circuit signal from the target track section through the second isolation unit;
the first axle counting outdoor device and the second axle counting outdoor device are respectively arranged at two ends of the target track section;
the axle counting indoor host is used for comparing the axle counting number of the first axle counting outdoor device with the axle counting number of the second axle counting outdoor device to obtain a comparison result;
and the working state of the track relay and the comparison result are both used for indicating the use state of the target track section.
2. The system according to claim 1, wherein the working state of the track relay is a release state, or when the comparison result is unequal, the usage state of the target track section is occupied;
and the working state of the track relay is a suction state, or when the comparison result is equal, the use state of the target track section is idle.
3. The system of claim 1, wherein the indoor isolation box of the second isolation unit is connected to the track relay by a guard box.
4. The system of claim 1, wherein a lightning protection module is connected between the indoor isolation box and the outdoor isolation box of each isolation unit;
and a lightning protection module is arranged between the outdoor isolation box of each isolation unit and the target track section.
5. The system of claim 1, wherein each of the isolation units further comprises a track transformer, the track transformer being connected to an outdoor isolation box of the isolation unit, the track transformer being configured to transform a track circuit signal passing through the outdoor isolation box.
6. The system of claim 1, wherein the axle counting indoor host is further configured to zero the number of axles of the first axle counting outdoor unit and the number of axles of the second axle counting outdoor unit.
7. The system of claim 1, further comprising a frequency-shifting transmitter box, wherein the frequency-shifting transmitter box is respectively connected with the indoor isolation boxes of the two isolation units;
the frequency shift transmitting box is used for transmitting a frequency shift locomotive signal to the train running on the target track section through the first isolation unit or the second isolation unit.
8. The system according to claim 7, wherein in each of the isolation units, the outdoor isolation box and the indoor isolation box each comprise a comprehensive signal interface, a shaft counting interface, a track interface and a frequency shift interface, a shaft counting isolation circuit is arranged between the comprehensive signal interface and the shaft counting interface, a track isolation circuit is arranged between the comprehensive signal interface and the track interface, and a frequency shift isolation circuit is arranged between the comprehensive signal interface and the frequency shift interface;
in the first isolation unit, a comprehensive signal interface of the outdoor isolation box is connected with a comprehensive signal interface of the indoor isolation box;
the axle counting interface of the outdoor isolation box is connected with the first axle counting outdoor device, and the track interface and the frequency shift interface are connected to the target track section;
the axle counting interface of the indoor isolation box is connected with the axle counting indoor host and the remote power supply, the track interface is connected with the indoor transformer, and the frequency shift interface is connected with the frequency shift sending box;
in the second isolation unit, a comprehensive signal interface of the outdoor isolation box is connected with a comprehensive signal interface of the indoor isolation box;
the axle counting interface of the outdoor isolation box is connected with the second axle counting outdoor device, and the track interface and the frequency shift interface are connected to the target track section;
the axle counting interface of the indoor isolation box is connected with the axle counting indoor host and the remote power supply, the track interface is connected with the track relay, and the frequency shift interface is connected with the frequency shift sending box.
9. The system of claim 8, wherein the axle counting interface comprises an axle counting signal interface for transmitting an axle counting signal and an axle counting drive interface for transmitting an axle counting drive current;
the axle counting signals comprise signals sent by the axle counting outdoor device to the axle counting indoor host machine and signals sent by the axle counting indoor host machine to the axle counting outdoor device.
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| CN115402374B (en) | 2024-03-01 |
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