CN102267478A - Train-mounted device for train control system and method for demodulating track-circuit signal - Google Patents
Train-mounted device for train control system and method for demodulating track-circuit signal Download PDFInfo
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- CN102267478A CN102267478A CN2011101265311A CN201110126531A CN102267478A CN 102267478 A CN102267478 A CN 102267478A CN 2011101265311 A CN2011101265311 A CN 2011101265311A CN 201110126531 A CN201110126531 A CN 201110126531A CN 102267478 A CN102267478 A CN 102267478A
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Abstract
The invention discloses a train-mounted device for a train control system, and the device comprises a track-circuit signal reading unit, a route information reading unit and a calculating unit, wherein the track-circuit signal reading unit is used for reading a track-circuit signal and demodulating the track-circuit signal by adopting a time frequency domain combined approach on the basis of taking 2 from 2, thereby acquiring train travelling permission information; the route information reading unit is used for reading route information from a ground point type transponder; and the calculating unit is used for calculating a speed protection curve of the train according to the train travelling permission information and the route information. The invention discloses a method for demodulating the track-circuit signal. The invention provides an ATP (Train Hypervelocity Protection) train-mounted device which meets the technical standard of a CTCS-2 (Chinese train control system-2) level train control system and can be used for controlling the running of the train in real time.
Description
Technical field
The present invention relates to a kind of mobile unit, relate in particular to the method for a kind of train control system mobile unit and demodulation track-circuit signalling.
Background technology
Because train speed improves constantly, train not only high speed but also safe operation can't have been protected by ground signal and traditional LKJ mobile unit.Therefore, need exploitation a kind of meet CTCS-2 level train control system specification, can be to train operation ATP (train overspeeding protection) mobile unit of control in real time.
Summary of the invention
In order to solve the problems of the prior art, an embodiment according to the application discloses a kind of train control system mobile unit, comprising:
The track-circuit signalling reading unit reads track-circuit signalling, adopts the mode of time-frequency domain combination to get the described track-circuit signalling of 2 demodulation based on 2, to obtain the train travel License Info;
The line information reading unit reads line information from the dot-mode transponder of ground;
Calculating unit utilizes described driving License Info and described line information to calculate the speed protection curve of described train.
Preferably, the train control system mobile unit also comprises:
Speed sensor units is exported current train speed to calculating unit;
Comparing unit compares the present speed of described train and speed protection curve.
Preferably, the train control system mobile unit also comprises:
The braking output unit when the comparative result of comparing unit is a described present speed when exceeding the speed that allows in the described speed protection curve, sends brake command.
Preferably, described track-circuit signalling reading unit comprises: first computing module, second computing module and RAM, described first computing module and described second computing module carry out data exchange by described RAM.
Preferably, the train control system mobile unit also comprises the man machine interface interface.
Preferably, described man machine interface interface comprises:
Main display unit is the liquid crystal display display unit;
Auxilliary display unit is led display unit;
The master handles CPU, controls the displaying contents of described main display unit;
Assist and handle CPU, control the displaying contents of described auxilliary display unit;
Communication cpu, control correspondence with foreign country and selection inner display unit.
Preferably, the display part of described main display unit and described auxilliary display unit only has one to show at synchronization.
Preferably, the train control system mobile unit is based on the CTCS-2 level train control system mobile unit of track circuit information and point information.
According to another embodiment of the application, a kind of method of demodulation track-circuit signalling is also disclosed, comprising:
The first computing module acquisition trajectory circuit signal of track-circuit signalling reading unit, and utilize fft algorithm to draw the frequency and the power of described track-circuit signalling carrier wave;
Described track-circuit signalling is carried out bandpass filtering, and the sequential element value after the calculation of filtered becomes the time gap of nonnegative value from negative value, preserves each time gap and forms output sequence;
Calculate computing exponent number N, valid data length L and sampling interval M that low frequency demodulation fft algorithm needs;
Element of the every interval M element extraction of described output sequence is reassembled into new ordered series of numbers, from new ordered series of numbers, takes out L point, carry out 2
NThe FFT conversion of counting;
Search prominent spectral line signal frequency value corresponding in the ordered series of numbers after conversion;
The power of verifying described spectral line whether in the cooresponding spectral power scope of current carrier frequency frequency, if not think that current low frequency demodulation result is invalid;
Exchange current demodulation result with second computing module;
The conformability of the low frequency demodulation result of more described first computing module and second computing module, if inconsistent and the tolerance time limit in (smaller or equal to 4 seconds), then will separate the low frequency mediated last time as current results, otherwise will " not have sign indicating number " as current demodulation result.
By the present invention, can provide a kind of CTCS-2 of meeting level train control system specification, can be to the real-time ATP mobile unit of control of train operation.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 illustrates according to the row car controlling of an embodiment of the application and carries equipment;
Fig. 2 illustrates according to the row car controlling of another embodiment of the application and carries equipment;
Fig. 3 illustrates the track-circuit signalling reading unit among Fig. 2;
Fig. 4 illustrates the man machine interface interface among Fig. 2;
Fig. 5 illustrates the method according to the demodulation track-circuit signalling of an embodiment of the application;
Fig. 6 illustrates the track-circuit signalling of sampling through FFT among Fig. 5;
Fig. 7 illustrates the output data sequence among Fig. 5.
The specific embodiment
Describe embodiments of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 illustrates according to the row car controlling of an embodiment of the application and carries equipment.As shown in Figure 1, the row car controlling of this embodiment is carried equipment and is comprised track-circuit signalling reading unit 10, line information reading unit 20 and calculating unit 30.Wherein track-circuit signalling reading unit 10 reads track-circuit signalling, and the mode of employing time-frequency domain combination is got 2 pairs of track-circuit signallings based on 2 and carried out demodulation, to obtain the train travel License Info; Line information reading unit 20 reads line information from the dot-mode transponder of ground; Calculating unit 30 utilizes driving License Info and line information to calculate the speed protection curve of train.
By above-mentioned embodiment, provide a kind of CTCS-2 of meeting level train control system specification, can be to the real-time ATP mobile unit of control of train operation.
Fig. 2 illustrates according to the row car controlling of another embodiment of the application and carries equipment.As shown in Figure 2, the row car controlling of this embodiment is carried equipment and is comprised track-circuit signalling reading unit 10, line information reading unit 20 and calculating unit 30.The row car controlling of this embodiment is carried equipment and is also comprised speed sensor units 80, comparing unit 40 and braking output unit 50.Wherein track-circuit signalling reading unit 10 reads track-circuit signalling, and the mode of employing time-frequency domain combination is got 2 pairs of track-circuit signallings based on 2 and carried out demodulation, to obtain the train travel License Info; Line information reading unit 20 reads line information from the dot-mode transponder of ground; Calculating unit 30 utilizes driving License Info and line information to calculate the speed protection curve of train.Speed sensor units 80 is to the current train speed of calculating unit 30 outputs; Comparing unit 40 speed that train is current compares with the speed protection curve that is obtained, and when the present speed of train had exceeded the speed of permission of speed protection curve, braking output unit 50 sent brake command.
By above-mentioned embodiment, provide a kind of CTCS-2 of meeting level train control system specification, can be to the real-time ATP mobile unit of control of train operation.
Fig. 3 illustrates the track-circuit signalling reading unit (TCR) 10 among Fig. 2.As shown in Figure 3, track-circuit signalling reading unit 10 comprises first computing module (TCR CPU1), 11 and second computing module (TCR CPU2) 12, and the two carries out data exchange by two-port RAM (DPRAM) 13.As shown in Figure 3, what link to each other with second computing module 12 with first computing module 11 of track-circuit signalling reading unit 10 is respectively 61, the second fail-safe computer logical calculated unit (VC CPU2) 62, the first fail-safe computer logical calculated unit (VC CPU1), wherein 1 is parallel data bus line (16 bit wide), and 2 is RS422 universal serial bus (5 line system).
As shown in Figure 2, the row car controlling of this embodiment is carried equipment except comprising above-mentioned track-circuit signalling reading unit 10, line information reading unit 20, calculating unit 30, speed sensor units 80, outside comparing unit 40 and the braking output unit 50, can also comprise man machine interface interface 70.Wherein track-circuit signalling reading unit 10 reads track-circuit signalling, and the mode of employing time-frequency domain combination is got 2 pairs of track-circuit signallings based on 2 and carried out demodulation, to obtain the train travel License Info; Line information reading unit 20 reads line information from the dot-mode transponder of ground; Calculating unit 30 utilizes driving License Info and line information to calculate the speed protection curve of train.Speed sensor units 80, to the current train speed of calculating unit 30 outputs, comparing unit 40 speed that train is current compares with the speed protection curve that is obtained, when the present speed of train has exceeded the speed of permission of speed protection curve, braking output unit 50 sends brake command, and warning information is sent at man machine interface interface 70.Fig. 4 illustrates the man machine interface interface 70 among Fig. 2.As shown in Figure 4, man machine interface interface 70 comprises main display unit 71, auxilliary display unit 72, the main CPU73 of processing, the auxilliary CPU74 of processing and communication cpu 75.Wherein, main display unit 71 is liquid crystal display display units; Auxilliary display unit 72 refers to led display unit; Main processing CPU73 is used for controlling the displaying contents of main display unit; The auxilliary CPU74 of processing is used for controlling the demonstration of assisting display unit; Communication cpu 75 control correspondence with foreign countries and inner display unit are selected.
As shown in Figure 4, man machine interface interface 70 also comprises button 76, shows change-over switch 77 and loud speaker 78 except that comprising main display unit 71, auxilliary display unit 72, the main CPU73 of processing, the auxilliary CPU74 of processing and communication cpu 75.The wherein main CPU73 of processing also carries out button to be handled, when having sound to play, by loud speaker 78 pronunciations.Comparing unit 40 speed that train is current compares with the speed protection curve that is obtained, when the present speed of train has exceeded the speed of permission of speed protection curve, warning information is sent at man machine interface interface 70, and warning information can be sound, light warning information.The main CPU73 of processing adopts serial communication interface and communication cpu 75 to communicate, and reception is from the various information of communication cpu 75 on the one hand, on the other hand the driver is sent to communication cpu 75 to the various operations of button 76.The auxilliary CPU74 of processing also carries out button to be handled.The auxilliary CPU74 of processing adopts serial communication interface and communication cpu 75 to communicate, and reception is from the various information of communication cpu 75 on the one hand, on the other hand the driver is sent to communication cpu 75 to the various operations of button 76.Communication cpu 75 adopts serial communication interface and main CPU73 of processing or the auxilliary CPU74 of processing to communicate.Button 76 is meant the button that is arranged on the man machine interface interface 70, according to current show state, by main CPU73 of processing or the auxilliary CPU74 that handles the key-press status that collects is sent to communication cpu 75.
The display system at man machine interface interface 70 is divided into main and auxiliary two display units 71,72.For avoiding the phase mutual interference, do not work simultaneously in the display part of the main and auxiliary display unit 71,72 at two demonstration man machine interfaces interface 70, and promptly when a certain unit showed, the display part of another unit should not show.Main display unit 71 (liquid crystal display) is as show media under the normal circumstances, and auxilliary display unit 72 is as cold spare.Has handoff functionality between the display part of main and auxiliary display unit 71,72.As shown in Figure 4, man machine interface interface 70 also comprises demonstration change-over switch 77, shows to switch to be divided into manual switchover and automatic switchover dual mode.The driver shows change-over switch 77 by manual operations, and the demonstration of carrying out between the main and auxiliary apparent unit 71,72 is switched.Show change-over switch 77 normal conditions for upspringing, communication cpu 75 is sent to the main CPU73 of processing with the data of VC, and main display unit 71 carries out data display.When showing that change-over switch 77 is pressed, communication cpu 75 switches to the auxilliary CPU74 of processing with communication port, and man machine interface interface 70 adopts auxilliary display unit 72 to show.Man machine interface interface 70 selects the data of main CPU73 of processing or the auxilliary CPU74 of processing to be sent to VC's according to the state that switches.For availability and the reliability that improves total system, after the communication disruption on a certain road among the main and auxiliary processing CPU73,74, the data on another road are brought into use at man machine interface interface 70, and when switches communication channels, the display part correspondingly switches to respective display unit.This switching is carried out as the case may be automatically by man machine interface interface 70 softwares, need not artificial intervention.It is identical when the processing mode of main and auxiliary display unit is with manual switchover after switching.
Fig. 5 illustrates the method according to the demodulation track-circuit signalling of an embodiment of the application, and Fig. 6 illustrates the track-circuit signalling of sampling through FFT among Fig. 5, and Fig. 7 illustrates the output data sequence among Fig. 5.As Fig. 5-shown in Figure 7, in step S110, a computing module of track-circuit signalling reading unit (for example first computing module) acquisition trajectory circuit signal, and utilize fft algorithm to draw the frequency and the power of described track-circuit signalling carrier wave, as shown in Figure 6.
In step S120, described track-circuit signalling is carried out bandpass filtering, the sequential element value after the calculation of filtered becomes the time gap of nonnegative value from negative value, preserves each time gap and forms output sequence, as shown in Figure 7.
In step S130, calculate computing exponent number N, valid data length L and sampling interval M that low frequency demodulation fft algorithm needs.For example, calculate computing exponent number N, valid data length L, the sampling interval M of low frequency demodulation fft algorithm needs according to the frequency characteristics of fsk modulated signal.
In step S140, element of the every interval M element extraction of described output sequence is reassembled into new ordered series of numbers, from new ordered series of numbers, take out L point, carry out 2
NThe FFT conversion of counting.
In step S150, search prominent spectral line signal frequency value corresponding in the ordered series of numbers after conversion.
In step S160, whether the power of verifying described spectral line is in the cooresponding spectral power scope of current carrier frequency frequency.If the power of spectral line in the cooresponding spectral power scope of current carrier frequency frequency, does not think that then current demodulation result is invalid.
Another computing module of track-circuit signalling reading unit 10 (for example second computing module) also carries out said process, thereby obtains current demodulation result.
In step S170, two current demodulation result of computing module exchange of track-circuit signalling reading unit 10.
In step S180, whether the low frequency demodulation result of more described first computing module and second computing module conformability, if inconsistent and the tolerance time limit (for example, smaller or equal to 4 seconds) in, then will separate the low frequency mediated last time as current results, otherwise will " not have sign indicating number " as current demodulation result.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of programmed instruction, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. train control system mobile unit comprises:
The track-circuit signalling reading unit reads track-circuit signalling, adopts the mode of time-frequency domain combination to get the described track-circuit signalling of 2 demodulation based on 2, to obtain the train travel License Info;
The line information reading unit reads line information from the dot-mode transponder of ground;
Calculating unit utilizes described driving License Info and described line information to calculate the speed protection curve of described train.
2. equipment according to claim 1 also comprises:
Speed sensor units is exported current train speed to described calculating unit;
Comparing unit compares the present speed of described train and speed protection curve.
3. equipment according to claim 2 also comprises:
The braking output unit when the comparative result of comparing unit is a described present speed when exceeding the speed that allows in the described speed protection curve, sends brake command.
4. equipment according to claim 1, wherein, described track-circuit signalling reading unit comprises: first computing module, second computing module and RAM, described first computing module and described second computing module carry out data exchange by described RAM.
5. equipment according to claim 1 also comprises the man machine interface interface.
6. equipment according to claim 5, wherein, described man machine interface interface comprises:
Main display unit is the liquid crystal display display unit;
Auxilliary display unit is led display unit;
The master handles CPU, controls the displaying contents of described main display unit;
Assist and handle CPU, control the displaying contents of described auxilliary display unit;
Communication cpu, control correspondence with foreign country and selection inner display unit.
7. equipment according to claim 6, wherein, the display part of described main display unit and described auxilliary display unit only has one to show at synchronization.
8. equipment according to claim 1, wherein, described equipment is the CTCS-2 level train control system mobile unit based on track circuit information and point information.
9. the method for a demodulation track-circuit signalling comprises:
The first computing module acquisition trajectory circuit signal of track-circuit signalling reading unit, and utilize fft algorithm to draw the frequency and the power of described track-circuit signalling carrier wave;
Described track-circuit signalling is carried out bandpass filtering, and the sequential element value after the calculation of filtered becomes the time gap of nonnegative value from negative value, preserves each time gap and forms output sequence;
Calculate computing exponent number N, valid data length L and sampling interval M that low frequency demodulation fft algorithm needs;
Element of the every interval M element extraction of described output sequence is reassembled into new ordered series of numbers, from new ordered series of numbers, takes out L point, carry out 2
NThe FFT conversion of counting;
Search prominent spectral line signal frequency value corresponding in the ordered series of numbers after conversion;
The power of verifying described spectral line whether in the cooresponding spectral power scope of current carrier frequency frequency, if not think that current demodulation result is invalid;
Exchange current demodulation result with second computing module;
If the conformability of the low frequency demodulation result of more described first computing module and second computing module inconsistent and in the tolerance time limit, then will be separated the low frequency mediated last time as current results, otherwise will " not have sign indicating number " as current demodulation result.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310009531.2A CN103144656B (en) | 2011-05-16 | 2011-05-16 | Train control system on-board equipment and method for demodulating track circuit signal |
| CN2011101265311A CN102267478A (en) | 2011-05-16 | 2011-05-16 | Train-mounted device for train control system and method for demodulating track-circuit signal |
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| CN2011101265311A CN102267478A (en) | 2011-05-16 | 2011-05-16 | Train-mounted device for train control system and method for demodulating track-circuit signal |
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| CN201310009531.2A Division CN103144656B (en) | 2011-05-16 | 2011-05-16 | Train control system on-board equipment and method for demodulating track circuit signal |
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| CN201310009531.2A Active CN103144656B (en) | 2011-05-16 | 2011-05-16 | Train control system on-board equipment and method for demodulating track circuit signal |
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| CN102778872A (en) * | 2012-07-05 | 2012-11-14 | 北京交通大学 | Real-time correction method for dynamic displacement of track circuit reader signal carrier frequency |
| CN103569161A (en) * | 2012-07-30 | 2014-02-12 | 北京西南交大盛阳科技有限公司 | Railway signal equipment operation alarming method based on data comparison and logical analysis |
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| CN106274987A (en) * | 2016-08-31 | 2017-01-04 | 上海自仪泰雷兹交通自动化系统有限公司 | A kind of point type ATP means of defence under degraded signal system |
| CN106394610A (en) * | 2016-10-18 | 2017-02-15 | 上海自仪泰雷兹交通自动化系统有限公司 | Dot mode ATO protection method under degradation signal system |
| CN109902599A (en) * | 2019-02-01 | 2019-06-18 | 初速度（苏州）科技有限公司 | A kind of high-precision car data quality detecting method and system |
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| CN102632908B (en) * | 2012-04-28 | 2015-07-29 | 北京交大思诺科技有限公司 | Track circuit reader |
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| CN102778872A (en) * | 2012-07-05 | 2012-11-14 | 北京交通大学 | Real-time correction method for dynamic displacement of track circuit reader signal carrier frequency |
| CN102778872B (en) * | 2012-07-05 | 2014-07-23 | 北京交通大学 | Real-time correction method for dynamic displacement of track circuit reader signal carrier frequency |
| CN103569161B (en) * | 2012-07-30 | 2015-11-04 | 北京西南交大盛阳科技有限公司 | Railway signals equipment based on comparing and logic analysis runs alarm method |
| CN103569161A (en) * | 2012-07-30 | 2014-02-12 | 北京西南交大盛阳科技有限公司 | Railway signal equipment operation alarming method based on data comparison and logical analysis |
| CN104129406A (en) * | 2014-08-25 | 2014-11-05 | 北京交大思诺科技有限公司 | Device and method for transmitting track circuit information |
| CN104129406B (en) * | 2014-08-25 | 2015-12-30 | 北京交大思诺科技股份有限公司 | A kind of apparatus and method for of transporting rail circuit information |
| CN106274987A (en) * | 2016-08-31 | 2017-01-04 | 上海自仪泰雷兹交通自动化系统有限公司 | A kind of point type ATP means of defence under degraded signal system |
| CN106274987B (en) * | 2016-08-31 | 2017-12-19 | 上海自仪泰雷兹交通自动化系统有限公司 | A kind of point type ATP means of defences under degraded signal system |
| CN106394610A (en) * | 2016-10-18 | 2017-02-15 | 上海自仪泰雷兹交通自动化系统有限公司 | Dot mode ATO protection method under degradation signal system |
| CN109902599A (en) * | 2019-02-01 | 2019-06-18 | 初速度（苏州）科技有限公司 | A kind of high-precision car data quality detecting method and system |
| CN109902599B (en) * | 2019-02-01 | 2021-08-10 | 初速度（苏州）科技有限公司 | High-precision vehicle data quality inspection method and system |
| CN110850773A (en) * | 2019-11-14 | 2020-02-28 | 北京和利时系统工程有限公司 | Signal acquisition method and device, computer storage medium and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103144656A (en) | 2013-06-12 |
| CN103144656B (en) | 2015-07-01 |
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Application publication date: 20111207 |