CN106985879A - A kind of train occupation detecting system and method - Google Patents
A kind of train occupation detecting system and method Download PDFInfo
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- CN106985879A CN106985879A CN201710253396.4A CN201710253396A CN106985879A CN 106985879 A CN106985879 A CN 106985879A CN 201710253396 A CN201710253396 A CN 201710253396A CN 106985879 A CN106985879 A CN 106985879A
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- 238000000034 method Methods 0.000 title abstract description 7
- 239000000835 fiber Substances 0.000 claims abstract description 62
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000005674 electromagnetic induction Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000023077 detection of light stimulus Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The present invention relates to a kind of train occupation detecting system and method, the system includes：Fiber grating detection unit, stress variation and processing detection signal for detecting track；Safe computing unit, is connected with fiber grating detection unit, for being verified to the detection signal after handled by fiber grating detection unit, and carries out all calculating relevant with train occupation detection.Fiber grating detection unit includes fiber grating unit and the Grating Modulation demodulating unit being connected with fiber grating unit.Safe computing unit is connected by security input unit with Grating Modulation demodulating unit.Compared with prior art, the present invention can adapt to the complex situations on urban track traffic working line, the automatic security protection for realizing train, greatly improves the safety of urban track traffic operation, has the advantages that simple installation, anti-electromagnetic interference capability are strong, sensitivity is high, stability is high.
Description
Technical field
The present invention relates to a kind of rail transit train operation control and the technology of safety protection field, more particularly, to one kind
Train occupation detecting system and method.
Background technology
The safety of urban track traffic operation is heavily dependent on train occupation detection.Under normal circumstances, in city
In Rail Transit System between train and train (comprising head-on, side blow and the three kinds of situations that knock into the back), train and track switch or other rails
The security protection of other equipment is realized in signal automatic control system (Automatic Train Control), but is being degraded
The security protection of pattern Train is largely dependent upon the detection of orbit occupancy.Main rail in city rail signal system
Road takes detection means and is mainly traditional track circuit and the meter shaft based on electromagnetic induction technology, wherein based on electromagnetic induction skill
The meter shaft of art is due to being adapted to poor railway roadbed condition, excessively low adverse circumstances of railway roadbed leak resistance and sensitive for the detection of light car
Property and gain great popularity, occupy orbit occupancy detection absolute leadership status.
Along with the meter shaft based on electromagnetic induction technology in the extensive promotion and application of field of track traffic, its shortcoming also day
Gradually it is exposed.Such as, the installation of outdoor head portion needs to punch on rail, causes mounting process complicated；Orbit occupancy
Detection depend on electromagnetic induction of the wheel rim by magnetic head, therefore it is preferably disturbed by other electromagnetic induction；Each magnetic head is that have
Source device is, it is necessary to substantial amounts of cable, causes Project Cost too high, while also easily influenceed by indoor power supply voltage pulsation, this
Also the meter shaft based on electromagnetic induction technology is caused to be not suitable for long section of suburban line etc..
Corresponding, fiber-optic grating sensor is passive device, lightweight, small volume, it is not necessary to beaten on rail
Hole, detection uses optical signal modulation mode, it is adaptable to transmit over long distances and distributed measurement, possesses excellent anti-electromagnetism and does
The characteristics of ability and high sensitivity disturbed, high stability.The technology is applied into train occupation detection will greatly improve train
Take detection method and industry application.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of electromagnetism interference energy
Power is strong, sensitivity is high, stability is high train occupation detecting system and method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of train occupation detecting system, including：
Fiber grating detection unit, stress variation and processing detection signal for detecting track；
Safe computing unit, is connected with fiber grating detection unit, for after handled by fiber grating detection unit
Detection signal is verified, and carries out all calculating relevant with train occupation detection.
The fiber grating detection unit includes：
Fiber grating unit, the stress variation for detecting track；
Grating Modulation demodulating unit, is connected with the fiber grating unit, for providing the incident light needed for fiber grating
With collect transmitted light after fiber grating reflects and handle the collection signal of fiber grating unit.
The safe computing unit is connected by security input unit with the Grating Modulation demodulating unit, and the safety is defeated
Enter signal acquisition and read-write logic control that unit starts respective channel according to the output result of Grating Modulation demodulating unit.
The system also includes Safety output interface unit, and the Safety output interface unit connects with the safe computing unit
Connect, the Safety output interface unit is received and handled after the output from safe computing unit, driving interface equipment, and in fact
When detection output with driving uniformity and correctness.
The Safety output interface unit is designed using double break, and each pair output sets a positive electricity output and a negative electricity defeated
Go out, while setting an indicator lamp in output port, the indicator lamp of respective channels can be lighted when only two outputs are simultaneously effective.
The safe computing unit takes two double CPU for redundant to configure using two.
The fiber grating unit include can selective printing opacity optical element.
A kind of train occupation detection method of use said detecting system, including：
101st, the pressure above fiber grating unit acquisition trajectory, and transmit a signal to Grating Modulation demodulating unit；
102nd, the pulse signal that Grating Modulation demodulating unit is sent to fiber grating unit is handled, if collection
To pressure change, start security input unit and carry out further data acquisition；
103rd, security input unit starts the signal acquisition and read-write logic of respective channel according to the output result of step 102
Control, safe computing unit is sent to by obtained information；
104th, safe computing unit carries out analysis calculating by the rail pressure passed back to security input unit, further really
Whether the deformation of orbit determination road is caused by train occupation, and Topology connection and the state of the track section of storage according to fiber grating
Information determines the occupancy of track section and goes out clear state；
105th, Safety output interface unit is exported according to safe computing unit orbit occupancy and go out clear state data it is true
Determine the type of output driving, export corresponding orbit occupancy and go out clear state.
The pulse signal that Grating Modulation demodulating unit is sent to fiber grating unit in the step 101 is handled
Specially：By the filtering and coupling to wavelength, environment where judging in fiber grating net which fiber grating change and
The offset size of change, filtering changes except the track pitch that is under pressure caused by outer other influences factor, and then provides certain
The pressure size that individual fiber grating is subject to.
The signal acquisition of security input unit includes collection port status, receives safe computing unit in the step 103
Issue test word；The read-write logic control of security input unit includes the decoding, read-write logic control and the choosing of data of address
Select output.
Compared with prior art, the present invention can adapt to the complex situations on urban track traffic working line, according to line
Road actual conditions, realize the security protection of train automatically, greatly improve the safety of urban track traffic operation；Optical fiber grating sensing
Device is passive device, lightweight, small volume, it is not necessary to punched on rail, be easily connected with optical fiber, low-loss, spectral characteristic are good,
Reliability is high, is adapted to work in adverse circumstances；Detection uses optical signal modulation mode, it is adaptable to transmits and divides over long distances
Cloth is measured, the characteristics of possessing ability and high sensitivity, the high stability of excellent electromagnetism interference；The technology is applied to row
Car, which takes detection, will greatly improve train occupation detection method and industry application.
Brief description of the drawings
Fig. 1 is detecting system basic block diagram of the present invention；
It is labeled as in figure：1- fiber grating units, 2- Grating Modulation demodulating units, 3- security input units, 4- is counted safely
Calculate unit, 5- Safety output interface units, 6- fiber grating detection units；
Fig. 2 is detection method flow chart；
Fig. 3 is the pulse signal detection and processing schematic diagram of the embodiment of the present invention.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
A kind of train occupation detecting system, as shown in figure 1, including：
Fiber grating detection unit 6, stress variation and processing detection signal for detecting track；
Safe computing unit 4, is connected with fiber grating detection unit 6, for fiber grating detection unit 6 it is handled after
Detection signal verified, and carry out all calculating relevant with train occupation detection.
Wherein, fiber grating detection unit 6 includes fiber grating unit 1 and Grating Modulation demodulating unit 2.
Fiber grating unit 1 is the grid being burnt at using instrument on optical fiber, and it is that the optics with selective printing opacity is quick
Sensing unit, the unit will be fixed on track, the stress variation for detecting track.When train orbits, train
Gravity cause track to produce deformation, the pitch between grid and grid will change, it will cause reflection wavelength to change,
Then transmitted light is fed back in Grating Modulation demodulating unit 2 by optical fiber.
Grating Modulation demodulating unit 2 be connected with fiber grating unit 1 there is provided the incident light needed for the fiber grating of networking and
Collect the transmitted light after fiber grating reflects and carry out wavelength detecting, be the core component of fiber-optic grating sensor.Grating
Modem module 2 judges which fiber grating surrounding environment is changed in fiber grating net by the filtering and coupling of wavelength
And the offset size of change, filtering changes except the rail pitch that is under pressure caused by outer other influences factor, and then gives
Go out the pressure size that some fiber grating is subject to, and security input unit 3 is given by this information by safe interface.
Safe computing unit 4 is connected by security input unit 3 with Grating Modulation demodulating unit 2, and security input unit 3 is
Start signal acquisition and the read-write logic control of respective channel according to the output result of Grating Modulation demodulating unit 2.Signal acquisition
Main to realize that collection port status, the safe computing unit 4 of reception issue test word, translating for address is mainly realized in read-write logic control
Code, read-write logic control and the selection of data output.By obtained information it is encoded after give safe computing unit 4.
Safe computing unit 4 is the core of train occupation detecting system of the present invention, for performing data check and owning
The calculating relevant with train occupation detection, including input/output addressing, the safety inspection of input/output, train occupation detection system
System and other subsystem communications.For the sake of safety, safe computing unit 4 takes 2 double CPU for redundant to configure using 2, and two independent
CPU is by the independent acquisition gathered data of security input unit 3, then by than exporting after more consistent.It is defeated by the data of calculating
Go out to give the Safety output interface unit 5 that safe computing unit 4 is connected.
Safety output interface unit 5 is received and handled after the output from safe computing unit 4, driving interface equipment, and
And the uniformity and correctness of detection output in real time and driving.Safety output interface unit 5 is designed using double break, and each pair output is set
A positive electricity output and a negative electricity output are put, while setting an indicator lamp in output port, only two outputs have simultaneously
The indicator lamp of respective channels can be lighted during effect.
Connection in Fig. 1 between unit can be wired form or wireless form.Unit
Power supply is directly supplied by trackside UPS, this ensure that the continuation of protection, improves the reliability of traffic safety.
A kind of train occupation detection method of use said detecting system, its flow chart as shown in Fig. 2 including：
101st, the pressure above the acquisition trajectory of fiber grating unit 1, and transmit a signal to Grating Modulation demodulating unit 2；
102nd, the pulse signal that Grating Modulation demodulating unit 2 is sent to fiber grating unit 1 is handled, by right
The filtering and coupling of wavelength, judge that the offset that environment where which fiber grating is changed and changed in fiber grating net is big
Small, filtering changes except the track pitch that is under pressure caused by outer other influences factor, so provide some fiber grating by
Pressure size, if collecting pressure change, start security input unit 3 carry out further data acquisition；
103rd, security input unit 3 starts the signal acquisition of respective channel according to the output result of step 102 and read-write is patrolled
Control is collected, obtained information is sent to safe computing unit 4；
104th, safe computing unit 4 carries out analysis calculating by the rail pressure passed back to security input unit 3, further
Determine whether track deformation is caused by train occupation, and Topology connection and the shape of the track section of storage according to fiber grating
State information determines the occupancy of track section and goes out clear state；
105th, Safety output interface unit 5 is exported according to safe computing unit 4 orbit occupancy and the data for going out clear state
The type of output driving is determined, corresponding orbit occupancy is exported and goes out clear state.
Fig. 3 is the pulse signal detection and processing schematic diagram, figure that the present embodiment carries out experiment collection in the northern marshalling yard in Wuhan
Middle curve is the pulse signal that fiber grating unit 1 is collected, and broken line is the pulse after the processing of Grating Modulation demodulating unit 2
Signal.Transverse axis is frequency acquisition in figure, and frequency acquisition is 190 hertz in schematic diagram, and the longitudinal axis is line pressure shift amount.Can be with from figure
Find out, be engineering truck by the train of the fiber grating unit 1, and have single shaft and three axles, collection result is consistent with reality.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, various equivalent modifications can be readily occurred in or replaced
Change, these modifications or substitutions should be all included within the scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection domain be defined.
Claims (10)
1. a kind of train occupation detecting system, it is characterised in that including：
Fiber grating detection unit, stress variation and processing detection signal for detecting track；
Safe computing unit, is connected with fiber grating detection unit, for the detection after handled by fiber grating detection unit
Signal is verified, and carries out all calculating relevant with train occupation detection.
2. a kind of train occupation detecting system according to claim 1, it is characterised in that the fiber grating detection unit
Including：
Fiber grating unit, the stress variation for detecting track；
Grating Modulation demodulating unit, is connected with the fiber grating unit, for providing incident light and receipts needed for fiber grating
Collect the transmitted light after fiber grating reflects and handle the collection signal of fiber grating unit.
3. a kind of train occupation detecting system according to claim 2, it is characterised in that the safe computing unit passes through
Security input unit is connected with the Grating Modulation demodulating unit, and the security input unit is according to Grating Modulation demodulating unit
Output result starts signal acquisition and the read-write logic control of respective channel.
4. a kind of train occupation detecting system according to claim 1, it is characterised in that it is defeated that the system also includes safety
Outgoing interface unit, the Safety output interface unit is connected with the safe computing unit, and the Safety output interface unit is received
And handle the output from safe computing unit after, driving interface equipment, and in real time detection output with driving uniformity and
Correctness.
5. a kind of train occupation detecting system according to claim 4, it is characterised in that the Safety output interface unit
Designed using double break, each pair output sets a positive electricity output and a negative electricity output, while setting a finger in output port
Show lamp, the indicator lamp of respective channels can be lighted when only two outputs are simultaneously effective.
6. a kind of train occupation detecting system according to claim 1, it is characterised in that the safe computing unit is used
Two take two double CPU for redundant to configure.
7. a kind of train occupation detecting system according to claim 2, it is characterised in that the fiber grating unit includes
Can selective printing opacity optical element.
8. the train occupation detection method of any described detecting system in a kind of use claim 1~7, it is characterised in that
Including：
101st, the pressure above fiber grating unit acquisition trajectory, and transmit a signal to Grating Modulation demodulating unit；
102nd, the pulse signal that Grating Modulation demodulating unit is sent to fiber grating unit is handled, if collecting pressure
Power changes, and starts security input unit and carries out further data acquisition；
103rd, security input unit starts signal acquisition and the read-write logic control of respective channel according to the output result of step 102
System, safe computing unit is sent to by obtained information；
104th, safe computing unit carries out analysis calculating by the rail pressure passed back to security input unit, further determines that rail
Whether road deformation is caused by train occupation, and Topology connection and the status information of the track section of storage according to fiber grating
Determine the occupancy of track section and go out clear state；
105th, Safety output interface unit is exported according to safe computing unit orbit occupancy and go out clear state data determine it is defeated
Go out the type of driving, export corresponding orbit occupancy and go out clear state.
9. a kind of train occupation detection method according to claim 8, it is characterised in that grating is adjusted in the step 101
The pulse signal that demodulating unit processed is sent to fiber grating unit is handled specially：Pass through the filtering to wavelength and coupling
Close, judge the offset size that environment where which fiber grating is changed and changed in fiber grating net, filter except rail
The road pitch that is under pressure caused by outer other influences factor changes, and then provides the pressure size that some fiber grating is subject to.
10. a kind of train occupation detection method according to claim 8, it is characterised in that safety is defeated in the step 103
The signal acquisition for entering unit issues test word including collection port status, the safe computing unit of reception；The reading of security input unit
Write decoding of the logic control including address, read-write logic control and the selection of data output.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710253396.4A CN106985879A (en) | 2017-04-18 | 2017-04-18 | A kind of train occupation detecting system and method |
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| CN201710253396.4A CN106985879A (en) | 2017-04-18 | 2017-04-18 | A kind of train occupation detecting system and method |
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Cited By (3)
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| CN110450824A (en) * | 2019-07-26 | 2019-11-15 | 深圳市科安达轨道交通技术有限公司 | A kind of railway signal monitoring system based on multi-channel optical fibre communication |
| CN110823264A (en) * | 2019-11-26 | 2020-02-21 | 北京全路通信信号研究设计院集团有限公司 | Continuous track occupation inspection system based on fiber grating sensing technology |
| CN112491685A (en) * | 2020-12-31 | 2021-03-12 | 郑州铁路职业技术学院 | High-reliability subway signal transmission protection method |
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