Distributed track circuit system

Abstract

The utility model discloses a distributed track circuit system which comprises an interface unit and a plurality of trackside control units distributed along a railway, each trackside control unit comprises a communication module, a power supply module, at least one sending device and at least one receiving device, the interface unit comprises a communication interface unit, and the communication interface unit is connected with the power supply module. The communication interface unit of the interface unit communicates with the communication module of the trackside control unit, the power supply module of the trackside control unit is used for supplying power to the whole trackside control unit, and the communication module of the trackside control unit is respectively connected with the sending device and the receiving device. According to the system, on the basis of realizing train occupancy inspection and sending running permission information to the train through the steel rail, the number of devices which are centrally arranged indoors can be reduced, and the use of cables is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway signal field, especially a kind of distributed track circuit system. BACKGROUND

[0002] Currently, CTCS mainly uses ZPW-2000 track circuit, and the main function is train occupation check and sending train operation permission information to train through rail.

[0003] ZPW-2000 track circuit sets sending device and receiving device in room, sending device generates frequency shift signal according to coding condition, and transmits to outdoor rail through cable, then transmits to receiver through cable, and receiving device judges whether there is train occupation by receiving signal.When train wheel short-circuit rail, train induction antenna receives frequency shift signal, and obtains train operation permission information.

[0004] Because ZPW-2000 track circuit sets sending device and receiving device in room, and connects with outdoor rail through signal cable, indoor equipment occupies larger house area;Because the number of signal cable used is more, construction difficulty is greater;In addition, the transmission loss of signal cable will limit the maximum control range of track circuit, for the length exceeding the maximum design length of signal cable, signal relay station needs to be set. UTILITY MODEL CONTENT

[0005] The utility model aims at at least solving one of the technical problems existing in prior art, and proposes a kind of distributed track circuit system, which can realize train occupation check and send train operation permission information to train through rail on the basis that equipment can be centrally set in room, and the use of cable is reduced.

[0006] The technical scheme of the utility model is realized as follows: the utility model discloses a kind of distributed track circuit system, including interface unit and multiple trackside control units distributed along railway line, each trackside control unit includes communication module, power module and at least one sending device and at least one receiving device, the interface unit includes communication interface unit, the communication interface unit of the interface unit is communicated with the communication module of trackside control unit, the power module of trackside control unit is used to power supply entire trackside control unit, and the communication module of trackside control unit is connected with sending device and receiving device respectively.

[0007] Further, the communication interface unit of the interface unit is communicated with the communication module of trackside control unit by optical fiber.

[0008] Further, interface unit further includes power unit, the input end of the power unit of interface unit is connected with power supply, and the output end of power unit is connected with the power module of trackside control unit.

[0009] Further, the power supply unit of the interface unit is connected with the power module of the trackside control unit through a power cable.

[0010] Further, the sending device and the receiving device are connected with the rail.

[0011] Further, the sending device and the receiving device are connected with the rail through a branch cable.

[0012] Further, the communication interface unit is connected with the train control system.

[0013] Further, each trackside control unit comprises a plurality of sending devices and a plurality of receiving devices.

[0014] Further, the interface unit is located indoors, and the trackside control unit is located outdoors.

[0015] The utility model has at least the following beneficial effects:

[0016] The utility model provides a track circuit system, it adopts the distributed architecture based on optical fiber communication, including outdoor trackside control unit, indoor interface unit and connecting line, track circuit outdoor trackside control unit is close to set in the railway along, contains a plurality of sending device and receiving device, and the matched communication module, power module, track circuit indoor interface unit sets up in the computer lab, contains communication interface unit and power supply unit, carries out communication based on optical fiber with trackside control unit, controls each track circuit sending device code of trackside control unit, and obtains each receiving device's track circuit occupation state of trackside control unit, while indoor interface unit provides power supply for the equipment of trackside control unit. The system sets up track circuit section and controls in the railway line, realizes train occupation inspection and sends train operation permission information to train through rail. And adopt above-mentioned track circuit system, only set up interface unit in the room, reduces the equipment centralized setting in the room, and the indoor equipment occupies the house area smaller, and indoor interface unit and trackside control unit adopt optical fiber communication, reduced the use to cable, reduced the limitation of cable damage to the maximum control range of track circuit. In addition, a plurality of sending devices and receiving devices are grouped and set in the trackside control unit, share the communication module and the power module, and resources are saved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The distributed track circuit system structure schematic diagram provided for an embodiment of the utility model is shown in the figure;

[0018] Figure 2 The arrangement schematic diagram of the distributed track circuit system provided for an embodiment of the utility model is shown in the figure. DETAILED DESCRIPTION

[0019] For those skilled in the art to better understand the technical scheme of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0020] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the usual meaning understood by a person skilled in the art to which the present application belongs. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" or "several" is two or more. Similarly, "one", "an" or "the" and similar words do not represent a quantity limit, but represent the existence of at least one. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] In the various drawings, the same elements are represented by similar reference numerals. For the sake of clarity, not all parts of the drawings are drawn to scale. In addition, some known parts may not be shown in the drawings.

[0022] Many specific details of the present application are described below, such as the structure, material, size, processing and technology of the components, in order to make the present application more clearly understood. But as those skilled in the art can understand, the present application can be implemented without these specific details.

[0023] Referring to Figure 1 and Figure 2 The embodiment of the present application discloses a kind of distributed track circuit system, including interface unit and multiple (two and two or more) trackside control unit distributed along railway line, each trackside control unit includes communication module, power module and at least one sending device and at least one receiving device, the interface unit includes communication interface unit, the communication interface unit of the interface unit and the communication module of trackside control unit communicate, the power module of the trackside control unit is used to power supply entire trackside control unit, the communication module of the trackside control unit is connected with sending device and receiving device respectively, sending device, receiving device are connected with rail.Coupled with sending device and receiving device, communication module, power module.

[0024] Further, each trackside control unit comprises a plurality of transmitting devices and a plurality of receiving devices.

[0025] Further, the communication interface unit of the interface unit communicates with the communication module of the trackside control unit through an optical fiber. The distributed track circuit system of the utility model connects the indoor communication interface unit and the communication module of the outdoor trackside control unit by communication optical cable, and realizes the communication between the indoor communication interface unit and the trackside control unit. The communication is based on optical fiber communication, adopts a redundant communication network, and any communication network failure does not affect the normal work of another communication network. The communication adopts a secure transmission protocol, and guarantees the safety of the transmission of key information such as track circuit coding conditions and track section occupation.

[0026] Further, the interface unit further comprises a power supply unit, the input end of the power supply unit of the interface unit is connected with a power source, and the output end of the power supply unit is connected with the power module of the trackside control unit. The power supply unit obtains power from the power source and provides power to the outdoor trackside control unit.

[0027] Further, the power supply unit of the interface unit is connected with the power module of the trackside control unit through a power cable. The distributed track circuit system of the utility model connects the indoor power supply unit and the outdoor trackside control unit by power cable, and provides power to the outdoor trackside control unit. The power supply unit of the indoor interface unit is adjusted and boosted, so that reliable power can be provided for the outdoor trackside control unit which is far away, and the power supply can be provided in bundles according to the distribution of the outdoor trackside control unit, and an independent power supply is adopted to reduce the influence of single power failure on system work.

[0028] Further, the transmitting devices and the receiving devices are connected with the steel rail through branch cables.

[0029] In some embodiments, the communication interface unit is connected with a train control system. The communication interface unit is used to obtain the coding conditions of each track section from the train control system and send them to the trackside control unit, and receive the track section occupation information sent by the trackside control unit and report the track section occupation information to the train control system.

[0030] In other embodiments, the communication interface unit is connected with a host computer, and the host computer is connected with a train control system.

[0031] Further, the trackside control unit is a trackside control cabinet.

[0032] Each transmitting device obtains the coding conditions from the communication module, including low-frequency code information (such as 18 kinds of low-frequency code information) specified by the train operation permission, generates corresponding frequency shift signals (such as 8 kinds of carrier frequencies), adjusts the frequency shift signals, and sends them to the steel rail. The transmitting devices can adopt a redundant configuration mode such as “1+1”.

[0033] Each receiving device receives the frequency shift signal from the rail through a branch cable, and judges whether the track section is occupied according to the amplitude, frequency and other information of the frequency shift signal, such as using threshold and FFT algorithm to judge whether the track section is occupied according to the amplitude, frequency and other information of the frequency shift signal. The receiving device sends the track section occupation information to the communication module. The receiving device can adopt a redundant configuration mode such as '1+1'.

[0034] The communication module receives the encoding condition from the indoor communication unit, and sends the encoding condition to each sending device. At the same time, the track section occupation information provided by each receiving device is sent to the indoor communication interface unit.

[0035] The power module converts the power supply to provide power for each sending device, each receiving device and the communication module.

[0036] Further, the power module is used for receiving the power supply provided by the interface unit, and converting the power supply to provide power for the sending device, the receiving device and the communication module.

[0037] Further, the interface unit is located indoors, i.e. in the machine room. The trackside control unit is located outdoors and is arranged near the railway line.

[0038] The distributed track circuit system of the patent comprises the following two steps in the specific implementation scheme:

[0039] 1. The outdoor track section is divided into several subareas according to the nearest, and each area is provided with a track circuit outdoor trackside control cabinet, which is arranged near the railway line.

[0040] 2. The track circuit indoor interface unit is arranged in the machine room, communicates with the trackside control cabinet based on optical fiber, controls the encoding of each track circuit sending device of the trackside control cabinet, and obtains the track circuit occupation state of each receiving device of the trackside control cabinet; at the same time, the indoor interface unit provides power supply for the devices of the trackside control cabinet.

[0041] The track circuit system is adopted in the utility model, the track circuit section is arranged on the railway line and controlled, and the train occupation inspection and the sending of the train driving permission information through the rail are realized. The track circuit system is adopted, the interface unit is arranged in the machine room, the device occupies a smaller house area, the indoor interface unit and the trackside control cabinet adopt optical fiber communication, the device house area is saved, the use of the cable is reduced, the limitation of the maximum control range of the track circuit caused by the cable damage is reduced, and even the signal relay station arranged due to the signal cable transmission distance limitation can be cancelled. In addition, the multiple sending devices and receiving devices are grouped and arranged in the trackside control cabinet, the communication module and the power module are shared, and the resources are saved.

[0042] It can be understood that the above implementation is only an exemplary embodiment for illustrating the principle of the present application, but the present application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present application, and these modifications and improvements are also considered as the protection scope of the present application.

Claims

1. A distributed track circuit system, characterized by: The interface unit comprises a communication interface unit, and a plurality of trackside control units distributed along the railway line, each trackside control unit comprising a communication module, a power module, and at least one transmitting device and at least one receiving device, the communication interface unit of the interface unit being in communication with the communication modules of the trackside control units, the power modules of the trackside control units being used to supply power to the entire trackside control units, and the communication modules of the trackside control units being connected with the transmitting devices and the receiving devices respectively.

2. Distributed track circuit system according to claim 1, characterized in that: The communication interface unit of the interface unit is in communication with the communication modules of the trackside control units through optical fibers.

3. Distributed track circuit system according to claim 1, characterized in that: The interface unit further comprises a power supply unit, an input end of the power supply unit of the interface unit being connected with a power source, and an output end of the power supply unit being connected with the power modules of the trackside control units.

4. Distributed track circuit system according to claim 3, characterized in that: The power supply unit of the interface unit is connected with the power modules of the trackside control units through power cables.

5. Distributed rail circuit system according to claim 1, characterized in that: The transmitting devices and the receiving devices are connected with the steel rails.

6. Distributed track circuit system according to claim 5, characterized in that: The transmitting devices and the receiving devices are connected with the steel rails through branch cables.

7. Distributed rail circuit system according to claim 1, characterized in that: The communication interface unit is connected with a train control system.

8. Distributed rail circuit system according to claim 1, characterized in that: Each trackside control unit comprises a plurality of transmitting devices and a plurality of receiving devices.

9. Distributed rail circuit system according to claim 1, characterized in that: The interface unit is located indoors, and the trackside control units are located outdoors.

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