CN103171590A - Detecting device for metro track circuit - Google Patents
Detecting device for metro track circuit Download PDFInfo
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- CN103171590A CN103171590A CN2011104397948A CN201110439794A CN103171590A CN 103171590 A CN103171590 A CN 103171590A CN 2011104397948 A CN2011104397948 A CN 2011104397948A CN 201110439794 A CN201110439794 A CN 201110439794A CN 103171590 A CN103171590 A CN 103171590A
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Abstract
The invention relates to a detecting device for a metro track circuit. The metro track circuit comprises a coupling unit, the detecting device comprises a signal analog module for analog station signal sending and a signal analysis module for analog train signal receiving. The signal analog module is connected with a coupling unit of the metro track circuit and sends an FSK signal to the metro track circuit, and the signal analysis module receives and processes the FSK signal of the metro track circuit. Compared with the prior art, the detecting device for the metro track circuit is a special device designed for signals specific to a metro track circuit system, can perform daily maintenance and detection on the metro track circuit system, helps maintenance personnel to adjust and compensate parameter setting of a capacitor in real time, and ensures normal work of a signal system. A maintenance method saves manpower, material resources and time, and maintenance and repair cost of the metro track circuit system is reduced.
Description
Technical field
The present invention relates to a kind of detecting device for the underground railway track circuit, especially relate to a kind of device that the underground railway track circuit is detected by fsk signal.
Background technology
Whether the underground railway track circuit is the circuit that consists of take one section rail as conductor, be used for continuous detecting subway section circuit and taken by rolling stock, also is used for control signal device or switching device, to guarantee traffic safety.The underground railway track Circuits System is subway communication signal dedicated system.In system, the transmission of vehicle position information is by the S-Bond loop wire, coordinates loop wire, and coupling unit and rail realize, track circuit is laid along track circuit, and it is the important component part in ATC (Automatic Train Control) system.Present track circuit can be realized: whether (1) checks and supervises the station track and take, prevent that the ground of mistake from handling route; (2) can check and supervise section with a switch or switches and have or not rolling stock to pass through, locking takies the track switch of section with a switch or switches, prevents from pulling during through turnout passing at rolling stock track switch; (3) check and the supervision track on rail whether intact, when the brittle fractures of rail of a certain track circuit section, the signal that protects this section station track also just can not be opened etc.; (4) the different information of transmission makes signal according to the variation of institute's protected section and the occupied situation of the place ahead adjacent segments and conversion shows.
At present, in Shanghai Underground various types of signal system, track circuit failure accounts for 36%, and switch breakdown accounts for 16%, and signal trouble accounts for 13%, and power fail accounts for 15%.The track circuit failure rate is the highest, impact driving efficient and quality.In addition, as the characteristics of telecommunication media itself, easily be subjected to environmental change, the effect of complicate factors such as railway roadbed change and traction current interference, difficult in maintenance.Add, existing detection technique means are low, and shortage is safeguarded and can't be obtained direct result by special inspecting equipment.Even call train detection, can only qualitative detection, can not quantitative analysis.Along with Shanghai Underground operation mileage and volume of passenger traffic increase, also day by day embody in the deficiency of context of detection, relate to the safe in operation problem of train due to signal system, so the correct transmission of signal is very important.
In the Digital Track Circuit system, the impact that the inductance of fsk signal transmit receive unit, capacitance are changed by ambient temperature and electromagnetic environment can be drifted about, and then have influence on the LC resonance circuit of FSK communication, make central frequency be offset, cause communication quality to descend, affect data transmission, thereby cause the train operation problem.Because row Car antnna received signal quality is not only relevant with the LC oscillation frequency, also with rail, the factors such as train status are relevant, therefore, the capacitance compensation value can not be simply adjusted by calculating, but will decide according to the aerial signal that train receives parameter how to adjust building-out capacitor.At present, there is no this type of isolated plant both at home and abroad.Metro operation company does not have special-purpose detecting instrument and actv. maintenance service, makes the maintenance of track circuit very difficult.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of device that the underground railway track circuit is detected by fsk signal for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of detecting device for the underground railway track circuit, described underground railway track circuit comprises coupling unit, described detecting device comprises the signal imitation module that sends for the simulation signaling at stations and is used for the signal analyse block that the simulation train signal receives, described signal imitation module is connected with the coupling unit of underground railway track circuit, send fsk signal to the underground railway track circuit, described signal analyse block receives the fsk signal of underground railway track circuit and processes.
Described signal imitation module comprises:
The first signal processing unit is used for train data information is carried out pretreatment, simulates the signal that send the subway station;
The first memory cell is connected with the first signal processing unit, is used for the signal information that storage signal the first processing unit generates;
The first display unit is connected with the first signal processing unit, is used for the signal information that shows that the first signal processing unit generates;
The FSK modulating unit is connected with the first signal processing unit, is used for the signal that the first signal processing unit produces is carried out the FSK modulation, produces fsk signal;
Amplifying unit is connected with FSK modulating unit and coupling unit, be used for amplifying fsk signal, and the signal after amplifying is sent to coupling unit.
The pretreatment of the first signal processing unit of described signal imitation module is that train data information is added start bit, check bit sum stop bit, and the encapsulation framing.
Described signal analyse block comprises:
Car antnna is used for receiving fsk signal from the underground railway track circuit;
Filter unit is connected with Car antnna, is used for the fsk signal that receives is carried out filtering;
The FSK demodulating unit is connected with filter unit, is used for filtered fsk signal is carried out demodulation;
The secondary signal processing unit is connected with the FSK demodulating unit, is used for the signal after the FSK demodulating unit receiving demodulation and processes;
The second memory cell is connected with the secondary signal processing unit, is used for storing the signal information after shape information, demodulating information and the secondary signal processing unit processes of the fsk signal that vehicle-mounted antenna reception arrives;
The second display unit is connected with the secondary signal processing unit, for the signal information after the shape information, demodulating information and the secondary signal processing unit processes that show the fsk signal that Car antnna receives.
Being treated to of the signal of the secondary signal processing unit of described signal analyse block after to demodulation: the at first start bit of search signal and stop bit, determine signal length, then by check bit, signal is carried out verification, obtain the bit error ratio, amplitude and the frequency of signal.
Compared with prior art, the present invention is directed to the signal special inspecting equipment of underground railway track design of circuit system, can carry out daily maintenance to the underground railway track system detects, the help on-line service personnel is adjusted the parameter setting of building-out capacitor, guarantee the normal operation of signal system, and maintenance service saves human and material resources and time, reduced the cost of underground railway track Circuits System maintenance.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the hardware configuration schematic diagram of embodiments of the invention;
Fig. 3 is the transport stream signal journey figure of embodiments of the invention.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
As shown in Figure 1, a kind of detecting device for the underground railway track circuit comprises the signal imitation module 1 that sends for the simulation signaling at stations and is used for the signal analyse block 2 that the simulation train signal receives.
Signal imitation module 1 comprises first signal processing unit 11, the first display unit 12, the first memory cell 13, FSK modulating unit 14 and amplifying unit 15.Wherein, the first display unit 12 be connected memory cell 13 and all be connected with first signal processing unit 11, be respectively used to store and show the signal information that storage first signal processing unit 11 generates.First signal processing unit 11, FSK modulating unit 14 are connected with amplifying unit successively and are connected, and after signal is produced by first signal processing unit 11, then process by FSK modulating unit 14 and amplifying unit 15.Amplifying unit 15 directly is connected with the coupling unit 3 of underground railway track circuit, and the fsk signal that processing is obtained transfers in the underground railway track circuit.
Signal analyse block 2 comprises secondary signal processing unit 21, the second display unit 22, the second memory cell 23, FSK demodulating unit 24, filter unit 25 and Car antnna 26.Wherein, the second display unit 22 and the second memory cell 23 are connected with secondary signal processing unit 21 respectively, are used for the information of storage and display.Car antnna 26, filter unit 25, FSK demodulating unit 24 and secondary signal processing unit are connected successively and are connected, after fsk signal in the underground railway track circuit is received by Car antnna 26, filtering and demodulation process by filter unit 25, FSK demodulating unit 24, be further processed by 21 pairs of signal informations of secondary signal processing unit again, thus the performance of analysis underground railway track circuit.
During detection, the concrete treatment scheme of signal as shown in Figure 3.At first, first signal processing unit in the signal imitation module carries out pretreatment to train data information, add start bit, check bit sum stop bit in train data information, and encapsulation framing, the signal that sends to simulate the subway station, then carry out the amplification of FSK modulation and signal, be sent to subsequently in the coupling unit of underground railway track circuit.At this moment, signal analyse block receives fsk signal in the underground railway track circuit by Car antnna, after gathering this signal, through filtering and FSK demodulation process, then further processed by the secondary signal processing unit, specifically be treated to: the start bit of search signal and stop bit, determine signal length, by check bit, signal is carried out verification again, obtain the bit error ratio, amplitude and the frequency of signal.The signal waveform that Car antnna receives, the demodulating information of FSK demodulating unit and signal processing module are processed the information that obtains and all can be shown by the second display module, and are stored in the second memory cell.
Above-mentioned detecting device can be realized by hardware as shown in Figure 2 in actual use, signal imitation module and signal analyse block have included telltale, PXI-8106 controller, PXI-6251 data collecting card and SCB-68 connection box, and signal analyse block has also comprised the Car antnna that is used for receiving signal in addition.The PXI-8106 controller can be realized the function of signal processing unit, memory cell, filter unit, amplifying unit, FSK modulating unit and FSK demodulating unit, the PXI-6251 data collecting card is used for the timing acquiring signal, the SCB-68 connection box plays the effect that circuit connects, the SCB-68 connection box of signal imitation module directly with the underground railway track circuit in be provided with coupling unit coupling plate be connected, to underground railway track circuit transmission fsk signal.The all hardware of signal analyse block all is arranged in the go-cart of a track-movable, the signal of traverse measurement each position by go-cart.
After hardware connects, service personnel can begin the underground railway track circuit is safeguarded, at first observe the waveform situation that shows on the telltale of signal analyse block in go-cart, if waveform is than more complete sinusoidal waveform, substantially there is no distortion, the proof reception good, if waveform is mixed and disorderly unordered or distortion is more serious, to check that hardware connects whether to go wrong, check simultaneously whether the waveform that vehicle-mounted antenna reception arrives is normal, after guaranteeing that hardware connects, begin the analysis to central frequency and the bit error ratio.In the shown central frequency of equipment on observing go-cart, to regulate the building-out capacitor on coupling plate, note simultaneously observing the bit error ratio, building-out capacitor value when finding the bit error ratio minimum, the building-out capacitor value of this moment is and receives the signal optimum value, with the value record of building-out capacitor and after adjusting, namely complete once normal the maintenance and the adjustment of building-out capacitor.
Claims (5)
1. detecting device that is used for the underground railway track circuit, described underground railway track circuit comprises coupling unit, it is characterized in that, described detecting device comprises the signal imitation module that sends for the simulation signaling at stations and is used for the signal analyse block that the simulation train signal receives, described signal imitation module is connected with the coupling unit of underground railway track circuit, send fsk signal to the underground railway track circuit, described signal analyse block receives the fsk signal of underground railway track circuit and processes.
2. a kind of detecting device for the underground railway track circuit according to claim 1, is characterized in that, described signal imitation module comprises:
The first signal processing unit is used for train data information is carried out pretreatment, simulates the signal that send the subway station;
The first memory cell is connected with the first signal processing unit, is used for the signal information that storage signal the first processing unit generates;
The first display unit is connected with the first signal processing unit, is used for the signal information that shows that the first signal processing unit generates;
The FSK modulating unit is connected with the first signal processing unit, is used for the signal that the first signal processing unit produces is carried out the FSK modulation, produces fsk signal;
Amplifying unit is connected with FSK modulating unit and coupling unit, be used for amplifying fsk signal, and the signal after amplifying is sent to coupling unit.
3. a kind of detecting device for the underground railway track circuit according to claim 2, it is characterized in that, the pretreatment of the first signal processing unit of described signal imitation module is that train data information is added start bit, check bit sum stop bit, and the encapsulation framing.
4. a kind of detecting device for the underground railway track circuit according to claim 1, is characterized in that, described signal analyse block comprises:
Car antnna is used for receiving fsk signal from the underground railway track circuit;
Filter unit is connected with Car antnna, is used for the fsk signal that receives is carried out filtering;
The FSK demodulating unit is connected with filter unit, is used for filtered fsk signal is carried out demodulation;
The secondary signal processing unit is connected with the FSK demodulating unit, is used for the signal after the FSK demodulating unit receiving demodulation and processes;
The second memory cell is connected with the secondary signal processing unit, is used for storing the signal information after shape information, demodulating information and the secondary signal processing unit processes of the fsk signal that vehicle-mounted antenna reception arrives;
The second display unit is connected with the secondary signal processing unit, for the signal information after the shape information, demodulating information and the secondary signal processing unit processes that show the fsk signal that Car antnna receives.
5. a kind of detecting device for the underground railway track circuit according to claim 4, it is characterized in that, being treated to of the signal of the secondary signal processing unit of described signal analyse block after to demodulation: the at first start bit of search signal and stop bit, determine signal length, by check bit, signal is carried out verification again, obtain the bit error ratio, amplitude and the frequency of signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104397948A CN103171590A (en) | 2011-12-23 | 2011-12-23 | Detecting device for metro track circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104397948A CN103171590A (en) | 2011-12-23 | 2011-12-23 | Detecting device for metro track circuit |
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| CN103171590A true CN103171590A (en) | 2013-06-26 |
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| CN2011104397948A Pending CN103171590A (en) | 2011-12-23 | 2011-12-23 | Detecting device for metro track circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777119A (en) * | 2014-02-20 | 2014-05-07 | 中国铁道科学研究院 | Method and system for detecting vehicle-mounted compensation capacitor |
| CN109387738A (en) * | 2018-12-14 | 2019-02-26 | 大连科技学院 | A kind of subway train debugging apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101100192A (en) * | 2007-08-02 | 2008-01-09 | 中铁七局集团有限公司 | Track circuit point front integral adjustment instrument |
| CN202413853U (en) * | 2011-12-23 | 2012-09-05 | 上海工程技术大学 | Metro rail circuit detecting device |
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2011
- 2011-12-23 CN CN2011104397948A patent/CN103171590A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101100192A (en) * | 2007-08-02 | 2008-01-09 | 中铁七局集团有限公司 | Track circuit point front integral adjustment instrument |
| CN202413853U (en) * | 2011-12-23 | 2012-09-05 | 上海工程技术大学 | Metro rail circuit detecting device |
Non-Patent Citations (2)
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| 张焕增 等: ""基于LabVIEW轨道交通车地通信系统FSK信号检测装置"", 《上海工程技术大学学报》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777119A (en) * | 2014-02-20 | 2014-05-07 | 中国铁道科学研究院 | Method and system for detecting vehicle-mounted compensation capacitor |
| CN103777119B (en) * | 2014-02-20 | 2016-07-06 | 中国铁道科学研究院 | A kind of vehicle-mounted compensation capacitance determining method and system |
| CN109387738A (en) * | 2018-12-14 | 2019-02-26 | 大连科技学院 | A kind of subway train debugging apparatus |
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Application publication date: 20130626 |