CN206813028U - A kind of train occupation detecting system - Google Patents
A kind of train occupation detecting system Download PDFInfo
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- CN206813028U CN206813028U CN201720405784.5U CN201720405784U CN206813028U CN 206813028 U CN206813028 U CN 206813028U CN 201720405784 U CN201720405784 U CN 201720405784U CN 206813028 U CN206813028 U CN 206813028U
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Abstract
A kind of train occupation detecting system is the utility model is related to, the system includes：For detecting the stress variation of track and the fiber grating detection unit of processing detection signal；Safe computing unit, it is connected with fiber grating detection unit.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 utility model can adapt to the complex situations on urban track traffic working line, the automatic security protection for realizing train, the safety of urban track traffic operation is greatly improved, have the advantages that strong simple installation, anti-electromagnetic interference capability, high sensitivity, stability are high.
Description
Technical field
The technology of a kind of rail transit train operation control and safety protection field is the utility model is related to, more particularly, to
A kind of train occupation detecting system.
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
It is mainly traditional track circuit and the meter shaft based on electromagnetic induction technology that road, which takes detection means, wherein based on electromagnetic induction skill
Railway roadbed condition is poor, the excessively low adverse circumstances of railway roadbed leak resistance and detection for light car are sensitive due to being adapted to for the meter shaft of art
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.For example the installation of outdoor head portion needs to punch on rail, cause 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 causes Project Cost too high, it is necessary to substantial amounts of cable, while is 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, in light weight, small volume, it is not necessary to beaten on rail
Hole, detect using optical signal modulation mode, suitable for long range transmission and distributed measurement, possess excellent anti-electromagnetism and do
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.
Utility model content
The purpose of this utility model is exactly to provide a kind of anti-electromagnetism the defects of overcoming above-mentioned prior art to exist and do
Disturb the high train occupation detecting system of strong ability, high sensitivity, stability.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of train occupation detecting system, it is characterised in that including：
For detecting the stress variation of track and the fiber grating detection unit of processing detection signal；
Safe computing unit, it is connected with fiber grating detection unit.
The fiber grating detection unit includes：
For the fiber grating unit for the stress variation for detecting track；
Grating Modulation demodulating unit, it 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.
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 double break structure, and each pair output sets a positive electricity output and a negative electricity defeated
Go out, while one indicator lamp is set in output port, the indicator lamp of respective channels can be lighted when only two outputs are simultaneously effective.
The safe computing unit is the two double CPU for redundant structures for taking two.
The fiber grating unit includes the optical element of alternative printing opacity.
Compared with prior art, the utility model can adapt to the complex situations on urban track traffic working line, root
According to circuit actual conditions, the security protection of train is realized automatically, greatly improves the safety of urban track traffic operation；Fiber grating
Sensor is passive device, in light weight, small volume, it is not necessary to punched on rail, be easily connected with optical fiber, low-loss, Spectral Properties
Property is good, reliability is high, is adapted to work in adverse circumstances；Detection passes using optical signal modulation mode suitable for long range
Defeated and distributed measurement, possesses the characteristics of ability and high sensitivity, high stability of excellent electromagnetism interference；Should by the technology
It will greatly improve train occupation detection method and industry application for train occupation detection.
Brief description of the drawings
Fig. 1 is the utility model detecting system basic block diagram；
It is labeled as in figure：1- fiber grating units, 2- Grating Modulation demodulating units, 3- security input units, 4- are counted safely
Calculate unit, 5- Safety output interface units, 6- fiber grating detection units；
Fig. 2 is the pulse signal detection and processing schematic diagram of the utility model embodiment.
Embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with the utility model
Implemented premised on technical scheme, give detailed embodiment and specific operating process, but guarantor of the present utility model
Shield scope is not limited to following embodiments.
A kind of train occupation detecting system, as shown in figure 1, including：
Fiber grating detection unit 6, for detecting the stress variation and processing detection signal of 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, for detecting the stress variation of 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 is connected with fiber grating unit 1, there is provided 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 changes in fiber grating net by the filtering and coupling of wavelength
And the offset size of change, filter except the rail pitch that is under pressure caused by outer other influences factor changes, and then give
Go out the pressure size that some fiber grating is subject to, and this information is given to security input unit 3 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 the utility model train occupation detecting system, for perform data check and
All calculating relevant with train occupation detection, including input/output addressing, the safety inspection of input/output, train occupation inspection
Examining 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 solely
Vertical CPU is by the independent acquisition gathered data of security input unit 3, then by than exporting after more consistent.By the number of calculating
According to output gives the Safety output interface unit 5 that safe computing unit 4 connects.
After Safety output interface unit 5 receives and handles 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 one indicator lamp is set 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.
Fig. 2 is the pulse signal detection and processing schematic diagram, figure that the present embodiment carries out testing collection in Wuhan north marshalling yard
Middle curve is the pulse signal that fiber grating unit 1 collects, and broken line is the arteries and veins after the processing of Grating Modulation demodulating unit 2
Rush 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 from figure
It is engineering truck by the train of the fiber grating unit 1 to find out, and has single shaft and three axles, collection result is consistent with reality.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in various in the technical scope that the utility model discloses
Equivalent modifications or substitutions, these modifications or substitutions should all cover within the scope of protection of the utility model.Therefore, this practicality
New protection domain should be defined by scope of the claims.
Claims (7)
- A kind of 1. train occupation detecting system, it is characterised in that including：For detecting the stress variation of track and the fiber grating detection unit of processing detection signal；Safe computing unit, it is connected with fiber grating detection unit.
- A kind of 2. train occupation detecting system according to claim 1, it is characterised in that the fiber grating detection unit Including：For the fiber grating unit for the stress variation for detecting track；Grating Modulation demodulating unit, it 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.
- 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 are connected with the safe computing unit.
- A kind of 5. train occupation detecting system according to claim 4, it is characterised in that the Safety output interface unit For double break structure, each pair output sets a positive electricity output and a negative electricity output, while sets an instruction in output port 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 two Take two double CPU for redundant structure.
- 7. a kind of train occupation detecting system according to claim 2, it is characterised in that the fiber grating unit includes The optical element of alternative printing opacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720405784.5U CN206813028U (en) | 2017-04-18 | 2017-04-18 | A kind of train occupation detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720405784.5U CN206813028U (en) | 2017-04-18 | 2017-04-18 | A kind of train occupation detecting system |
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| CN206813028U true CN206813028U (en) | 2017-12-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095057A (en) * | 2018-01-31 | 2019-08-06 | 株洲中车时代电气股份有限公司 | A kind of train pantograph method for detecting position, device, excessive phase method and system |
-
2017
- 2017-04-18 CN CN201720405784.5U patent/CN206813028U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110095057A (en) * | 2018-01-31 | 2019-08-06 | 株洲中车时代电气股份有限公司 | A kind of train pantograph method for detecting position, device, excessive phase method and system |
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