CN108909775A - A kind of railway monitoring device based on weak optical fiber Bragg grating - Google Patents
A kind of railway monitoring device based on weak optical fiber Bragg grating Download PDFInfo
- Publication number
- CN108909775A CN108909775A CN201810644739.4A CN201810644739A CN108909775A CN 108909775 A CN108909775 A CN 108909775A CN 201810644739 A CN201810644739 A CN 201810644739A CN 108909775 A CN108909775 A CN 108909775A
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- optical fiber
- rail
- monitoring device
- stationary fixture
- annular rack
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 45
- 238000012806 monitoring device Methods 0.000 title claims abstract description 16
- 230000035945 sensitivity Effects 0.000 claims abstract description 26
- 230000001953 sensory effect Effects 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 42
- 239000010959 steel Substances 0.000 claims description 42
- 239000003292 glue Substances 0.000 claims description 17
- 238000005538 encapsulation Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 13
- 241001669679 Eleotris Species 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000835 fiber Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to track operational safety monitoring device technical fields, refer specifically to a kind of railway monitoring device based on weak optical fiber Bragg grating；It is equipped with stationary fixture, freedom degree limitation component and sensory package, the stationary fixture including rail, between the two neighboring sleeper of the rail to be fixedly connected with the bottom edge of rail, it includes annular rack and clamp spring that freedom degree, which limits component,；The sensory package is located between rail and annular rack, and the optical fiber inscribed and have dim light grid is equipped in sensory package, and vibration enhanced sensitivity component is equipped in sensory package；Structure of the invention is reasonable, has electromagnetism interference, can work in harsh environment, and measurement sensitivity height and precision are high, makes to monitor more accurate；Strain and vibration signal can be generated by track when train operation, the real-time tracing to train and the monitoring to track occupation are realized by the strain and vibration signal of acquisition trajectory, improves train operation efficiency and safety.
Description
Technical field
The present invention relates to track operational safety monitoring device technical fields, refer specifically to a kind of track based on weak optical fiber Bragg grating
Monitoring device.
Background technique
Track transportation industry development in China's is increasingly powerful, it not only facilitates people's trip also to push the hair of China's economy
Exhibition, especially China's high-speed rail become the symbolistic mark in China in the world.With the speed-raising and train operation of train
High efficiency, the security performance of train more causes the concern of people, especially in the real-time tracing to train and to orbit occupancy knowledge
In terms of other monitoring.
Currently, the monitoring method of track occupation mainly has：Such as Chinese patent (patent No. 201310633649.2) " one
Kind train locating method and system ", monitoring method are determined by track circuit and the electronic map information of itself storage
The traffic direction and specific location of train realize the monitoring to track occupation.But the track circuit that the invention uses belongs to
Electric class sensing technology, vulnerable to electromagnetic field, the influence of external environment, that there are sensitivity is not high, corrosion resistance is poor, can not carry out in real time
The disadvantages of monitoring.
Chinese patent (patent No. 200610169813.9) is " using the realization train positioning of coherence optical fibre raster group and in real time
Monitoring method described in the method for tracking " is to monitor train using coherence optical fibre raster group to produce by respective rail section
The case where raw amplitude of oscillation signal is to monitor orbit occupancy.But lack in the summary of the invention fixation of fiber grating group is in-orbit
Device on road, and only fiber grating group is pasted on the inside of track, there are disadvantages for this method of attaching, as track is regular
Vibration will cause falling off and fixing not close for optical fiber, and protect optical fiber, optical fiber subject to damage, to make without encapsulating structure
The system is unreliable, and about 200~300 meters of fiber grating group setting interval in the summary of the invention, can not be to orbit occupancy feelings
Condition accurately identifies.
The positioning of existing other trains and railway monitoring technology, for example, track circuit for monitoring track occupation and
Copper cable, the frame-type test envelope for measuring train operation state, the hump based on track circuit mode survey long technology, electromagnetism meter shaft skill
Art, radar velocity measurement technology etc..The common feature of these technologies is all based on electronic technology realization, therefore is using these skills
The interference by electromagnetic field, external environment and weather is easy when art or equipment.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide one kind is structurally reasonable, solves tradition
Electric class sensing technology vulnerable to electromagnetic field, external environment and weather interference and caused by security hidden trouble, to improve column
Vehicle operational efficiency guarantees the railway monitoring device based on weak optical fiber Bragg grating of train operating safety.
To achieve the goals above, the present invention uses following technical scheme：
A kind of railway monitoring device based on weak optical fiber Bragg grating of the present invention, including rail, the rail it is adjacent
It is equipped with stationary fixture, freedom degree limitation component and sensory package between two sleepers, the bottom edge of the stationary fixture and rail is solid
Fixed connection, freedom degree limitation component include annular rack and clamp spring, clamp spring respectively with annular rack and stationary fixture
Upper end connection, and annular rack and the upper interior angle of rail side are oppositely arranged；The sensory package is located in rail and annular tooth
Between item, it is equipped with the optical fiber inscribed and there are dim light grid in sensory package, and is equipped with vibration enhanced sensitivity component in sensory package.
According to above scheme, the sensory package includes resonant springs and two steel pipes being arranged concentrically, resonant springs
Both ends are connect with one end of two steel pipes respectively, and optical fiber is arranged in steel pipe and resonant springs and optical fiber is fixedly connected with steel pipe；
The two sides of the resonant springs are equipped with one group of stationary fixture, and two steel pipes are located in corresponding stationary fixture and rail respectively
Between.
According to above scheme, a glue groove is offered on the steel pipe, is filled with envelope in optical fiber crossing point glue groove and point glue groove
Glue is filled, puts and is packaged with heat-shrink tube on the steel pipe at glue groove.
According to above scheme, steel pipe side corresponding with rail offers opening, and vibration enhanced sensitivity component includes enhanced sensitivity
Spring, enhanced sensitivity spring are arranged in the opening of steel pipe, and the inner end of enhanced sensitivity spring and optical fiber contradict and is arranged, the outer end of enhanced sensitivity spring with
Rail contradicts to keep compressive state.
According to above scheme, the steel pipe is equipped with card slot, and annular rack is connected on card slot, and the width and ring of card slot
Shape rack gear adaptation.
According to above scheme, the stationary fixture is equipped with drive bolt, the inner end of drive bolt and annular rack outside
Face contradicts setting.
According to above scheme, the stationary fixture includes support intermediate plate and fixing clip, supports intermediate plate lower end and fixing clamp
Piece is located in rail foot two sides respectively, and supports and connected between intermediate plate and fixing clip by fixing bolt, propclip on piece
End is oppositely arranged with the upper interior angle with rail side, and drive bolt and clamp spring are each attached to the upper end for supporting intermediate plate.
The present invention has the beneficial effect that：Structure of the invention is reasonable, has electromagnetism interference, can work in harsh environment, surveys
It measures high sensitivity and precision is high, make to monitor more accurate；Strain and vibration signal can be generated by track when train operation, is passed through
The strain of acquisition trajectory and vibration signal realize the real-time tracing to train and the monitoring to track occupation, improve train
Operational efficiency and safety.
Detailed description of the invention
Fig. 1 is whole side schematic cross-sectional view of the invention；
Fig. 2 is positive structure diagram of the invention；
Fig. 3 is sensory package positive structure diagram of the invention；
Fig. 4 is sensory package side structure schematic view of the invention.
In figure：
1, rail；2, stationary fixture；3, annular rack；4, sensory package；11, sleeper；21, fixing clip；22, propclip
Piece；23, fixing bolt；31, clamp spring；32, drive bolt；41, optical fiber；42, steel pipe；43, resonant springs；44, card slot；
45, glue groove is put；46, enhanced sensitivity spring.
Specific embodiment
Technical solution of the present invention is illustrated with embodiment with reference to the accompanying drawing.
As shown in Figure 1, a kind of railway monitoring device based on weak optical fiber Bragg grating of the present invention, including rail 1, it is described
Stationary fixture 2, freedom degree limitation component and sensory package 4, the stationary fixture are equipped between the two neighboring sleeper 11 of rail 1
2 are fixedly connected with the bottom edge of rail 1, and freedom degree limitation component includes annular rack 3 and clamp spring 31, and clamp spring 31 is distinguished
It is connect with annular rack 3 and 2 upper end of stationary fixture, and annular rack 3 and the upper interior angle of 1 side of rail are oppositely arranged；The biography
Sense component 4 is located between rail 1 and annular rack 3, the optical fiber 41 inscribed and have dim light grid is equipped in sensory package 4, and sense
Vibration enhanced sensitivity component is equipped in component 4；The sensory package 4 detects the vibration signal of rail 1 when train passes through by optical fiber 41
And strain signal, due to optical fiber 1 sensing itself have electromagnetism interference, can work in harsh environment, measurement sensitivity height and
The advantages that precision is high, is convenient for networking, and dim light grid array can be substantially reduced grating space, make to monitor more accurate；The biography
Sense component 4 is fixed on the rail 1 between two neighboring sleeper 11 by stationary fixture 2, the finite element analysis pressurizeed according to track
It learns, the rail head between two sleepers 11 and the deformation of web of the rail junction are maximum, to sensory package 4 is fixed on rail 1 interior
It can get optimal monitoring data at angle, the grating of the optical fiber 41 is weak reflection fiber grating, and grating length is short, reflection bandwidth
It is narrow, reflectivity is low, is easy to be multiplexed, grating space is short, is realized by time division multiplexing mode to the distributed monitoring of track condition.
The sensory package 4 includes resonant springs 43 and two steel pipes 42 being arranged concentrically, the both ends point of resonant springs 43
It is not connect with one end of two steel pipes 42, optical fiber 41 is arranged in steel pipe 42 and resonant springs 43 and optical fiber 41 and steel pipe 42 are fixed
Connection；The two sides of the resonant springs 43 are equipped with one group of stationary fixture 2, and two steel pipes 42 are located in corresponding fixation respectively
Between fixture 2 and rail 1；The resonant springs 43 have certain rigidity to guarantee the concentricity between two light pipes 42,
In order to which built in optical fiber 41, the stroke between two steel pipes 42 can turn the relative displacement between two groups of stationary fixtures 2
Turn to the relative displacement between the fixation steel pipe 42 on optical fiber 41 where two dim light grid.
A glue groove 45 is offered on the steel pipe 42, is filled with packaging plastic in 41 crossing point glue groove 45 of optical fiber and point glue groove 45
Water is put and is packaged with heat-shrink tube on the steel pipe 42 at glue groove 45, and the optical fiber 41 passes through the packaging plastic in point glue groove 45 with steel pipe 42
Hydropexis connection, then the reusable heat draw will put glue groove sealing, and the vibration of rail 1 and strain signal pass through the hard of stationary fixture 2
Property connection pass to sensory package 4, sensory package 4 will be shaken by the dim light grid on optical fiber 41 is converted into wavelength with strain signal
Shifted signal, to realize the vibration to train rail and strain monitoring.
The steel pipe 42 side corresponding with rail 1 offers opening, and vibration enhanced sensitivity component includes enhanced sensitivity spring 46, enhanced sensitivity
Spring 46 is arranged in the opening of steel pipe 42, and the inner end of enhanced sensitivity spring 46 and optical fiber 41 contradict and is arranged, the outer end of enhanced sensitivity spring 46
It contradicting to keep compressive state with rail 1, the enhanced sensitivity spring 46 is perpendicular to optical fiber 41 and one end is welded on steel pipe 42,
Enhanced sensitivity spring 46 contradicts rail 1 under compression, so that the vibration signal of track be enable more to be transmitted to the grating of optical fiber 1
On.
The steel pipe 42 is equipped with card slot 44, and annular rack 3 is connected on card slot 44, and the width and annular tooth of card slot 44
Item 3 is adapted to, and the freedom degree that the card slot 44 constitutes steel pipe 42 with annular rack 4 limits component, and annular rack 4 and rail 1 cooperate
Ring gripping is constituted to steel pipe 42, and annular rack 4 in the longitudinal direction limits steel pipe 1 with card slot 44, avoids steel pipe 42
Displacement sliding.
The stationary fixture 2 is equipped with drive bolt 32, and inner end and the conflict of 3 lateral surface of annular rack of drive bolt 32 are set
Set, the drive bolt 32 use Self-locking screw, screw thread be triangle thread, have high shock resistance, higher pretightning force and
Relaxing serializability can adjust annular rack 3 to the clamping force of steel pipe 42 by drive bolt 32, can steadily be held on rail
On 1.
The stationary fixture 2 includes support intermediate plate 22 and fixing clip 21, and support 22 lower end of intermediate plate is divided with fixing clip 21
It is not located in 1 two sides of the bottom of rail, and supports and is connected between intermediate plate 22 and fixing clip 21 by fixing bolt 23, supports intermediate plate
22 upper ends are oppositely arranged with the upper interior angle with 1 side of rail, and drive bolt 32 and clamp spring 31 are each attached to support intermediate plate 22
Upper end.
The above description is only a preferred embodiment of the present invention, thus it is all according to the configuration described in the scope of the patent application of the present invention,
The equivalent change or modification that feature and principle are done, is included in the scope of the patent application of the present invention.
Claims (7)
1. a kind of railway monitoring device based on weak optical fiber Bragg grating, including rail (1), it is characterised in that：The phase of the rail (1)
Stationary fixture (2), freedom degree limitation component and sensory package (4), the stationary fixture (2) are equipped between adjacent two sleepers (11)
It is fixedly connected with the bottom edge of rail (1), it includes annular rack (3) and clamp spring (31), clamp spring that freedom degree, which limits component,
(31) it is connect respectively with annular rack (3) and stationary fixture (2) upper end, and the upper interior angle of annular rack (3) and rail (1) side
It is oppositely arranged；The sensory package (4) is located between rail (1) and annular rack (3), is equipped with and inscribes in sensory package (4)
There is the optical fiber (41) of dim light grid, and is equipped with vibration enhanced sensitivity component in sensory package (4).
2. the railway monitoring device according to claim 1 based on weak optical fiber Bragg grating, it is characterised in that：The sensory package
(4) include resonant springs (43) and two steel pipes (42) being arranged concentrically, the both ends of resonant springs (43) respectively with two steel pipes
(42) one end connection, optical fiber (41) is arranged in steel pipe (42) and resonant springs (43) and optical fiber (41) and steel pipe (42) are fixed
Connection；The two sides of the resonant springs (43) are equipped with one group of stationary fixture (2), and two steel pipes (42) are located in correspondence respectively
Stationary fixture (2) and rail (1) between.
3. the railway monitoring device according to claim 2 based on weak optical fiber Bragg grating, it is characterised in that：The steel pipe (42)
On offer a glue groove (45), optical fiber (41) crossing point glue groove (45) and point glue groove (45) in filled with encapsulation glue, put glue groove
(45) heat-shrink tube is packaged on the steel pipe (42) at.
4. the railway monitoring device according to claim 2 based on weak optical fiber Bragg grating, it is characterised in that：The steel pipe (42)
Side corresponding with rail (1) offers opening, and vibration enhanced sensitivity component includes enhanced sensitivity spring (46), and enhanced sensitivity spring (46) is arranged in
In the opening of steel pipe (42), the inner end and optical fiber (41) of enhanced sensitivity spring (46), which contradict, to be arranged, the outer end of enhanced sensitivity spring (46) and steel
Rail (1) contradicts to keep compressive state.
5. the railway monitoring device according to claim 2 based on weak optical fiber Bragg grating, it is characterised in that：The steel pipe (42)
It is equipped with card slot (44), annular rack (3) is connected on card slot (44), and the width of card slot (44) is adapted to annular rack (3).
6. the railway monitoring device according to claim 1 based on weak optical fiber Bragg grating, it is characterised in that：The stationary fixture
(2) drive bolt (32) are equipped with, the inner end of drive bolt (32) and annular rack (3) lateral surface contradict and be arranged.
7. the railway monitoring device according to claim 6 based on weak optical fiber Bragg grating, it is characterised in that：The stationary fixture
It (2) include support intermediate plate (22) and fixing clip (21), support intermediate plate (22) lower end and fixing clip (21) are located in steel respectively
Rail (1) two sides of the bottom, and support and connect between intermediate plate (22) and fixing clip (21) by fixing bolt (23), support intermediate plate
(22) upper end is oppositely arranged with the upper interior angle with rail (1) side, and drive bolt (32) and clamp spring (31) are each attached to branch
Support (22) upper end of intermediate plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810644739.4A CN108909775B (en) | 2018-06-21 | 2018-06-21 | A kind of railway monitoring device based on weak optical fiber Bragg grating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810644739.4A CN108909775B (en) | 2018-06-21 | 2018-06-21 | A kind of railway monitoring device based on weak optical fiber Bragg grating |
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| Publication Number | Publication Date |
|---|---|
| CN108909775A true CN108909775A (en) | 2018-11-30 |
| CN108909775B CN108909775B (en) | 2019-10-01 |
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| CN201810644739.4A Active CN108909775B (en) | 2018-06-21 | 2018-06-21 | A kind of railway monitoring device based on weak optical fiber Bragg grating |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959724A (en) * | 2019-03-26 | 2019-07-02 | 武汉理工大学 | It is a kind of be motivated by ultrasound weak optical fiber Bragg grating mechanical structure flaw detection and defect positioning system |
| CN111256811A (en) * | 2020-04-01 | 2020-06-09 | 山东微感光电子有限公司 | Multifunctional distributed optical fiber vibration monitoring signal enhanced clamp and monitoring device |
| CN111751570A (en) * | 2020-06-18 | 2020-10-09 | 武汉理工大学 | Array fiber grating sensing system and method for speed measurement and positioning of magnetic suspension train |
| CN113008580A (en) * | 2021-02-23 | 2021-06-22 | 武汉智慧地铁信息技术有限公司 | Train monitoring system and monitoring method based on fiber bragg grating |
| CN113112766A (en) * | 2021-04-06 | 2021-07-13 | 国网甘肃省电力公司酒泉供电公司 | Optical fiber intelligent early warning system |
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| CN101000253A (en) * | 2006-12-29 | 2007-07-18 | 北京交通大学 | Method for implementing train positioning and real-time tracking using coherence optical fibre raster set |
| CN101377408A (en) * | 2007-08-30 | 2009-03-04 | 北京佳讯飞鸿电气股份有限公司 | Apparatus for indirectly measuring steel rail deformation parameter |
| CN101397021A (en) * | 2007-09-28 | 2009-04-01 | 北京佳讯飞鸿电气股份有限公司 | Vehicle running monitoring system based on optical fibre grating |
| CN101712328A (en) * | 2009-12-01 | 2010-05-26 | 西南交通大学 | Matched fiber grating based axle-counting device of high-speed railway |
| EP3275763A1 (en) * | 2016-07-27 | 2018-01-31 | Frauscher sensortechnik GmbH | Evaluation unit for a sensor arrangement for railway monitoring, sensor arrangement and corresponding method |
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Patent Citations (5)
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| CN101000253A (en) * | 2006-12-29 | 2007-07-18 | 北京交通大学 | Method for implementing train positioning and real-time tracking using coherence optical fibre raster set |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959724A (en) * | 2019-03-26 | 2019-07-02 | 武汉理工大学 | It is a kind of be motivated by ultrasound weak optical fiber Bragg grating mechanical structure flaw detection and defect positioning system |
| CN111256811A (en) * | 2020-04-01 | 2020-06-09 | 山东微感光电子有限公司 | Multifunctional distributed optical fiber vibration monitoring signal enhanced clamp and monitoring device |
| CN111256811B (en) * | 2020-04-01 | 2022-04-01 | 山东微感光电子有限公司 | Multifunctional distributed optical fiber vibration monitoring signal enhanced clamp and monitoring device |
| CN111751570A (en) * | 2020-06-18 | 2020-10-09 | 武汉理工大学 | Array fiber grating sensing system and method for speed measurement and positioning of magnetic suspension train |
| CN113008580A (en) * | 2021-02-23 | 2021-06-22 | 武汉智慧地铁信息技术有限公司 | Train monitoring system and monitoring method based on fiber bragg grating |
| CN113112766A (en) * | 2021-04-06 | 2021-07-13 | 国网甘肃省电力公司酒泉供电公司 | Optical fiber intelligent early warning system |
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