CN202329571U - Fiber bragg grating curvature sensor for monitoring stress deformation of flexible protective screening - Google Patents
Fiber bragg grating curvature sensor for monitoring stress deformation of flexible protective screening Download PDFInfo
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- CN202329571U CN202329571U CN2011204947801U CN201120494780U CN202329571U CN 202329571 U CN202329571 U CN 202329571U CN 2011204947801 U CN2011204947801 U CN 2011204947801U CN 201120494780 U CN201120494780 U CN 201120494780U CN 202329571 U CN202329571 U CN 202329571U
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Abstract
The utility model relates to a fiber bragg grating curvature sensor for monitoring stress deformation of a flexible protective screening, which includes a plastic bar (10) and a first group of fiber bragg gratings (21) and a second group of fiber bragg gratings (22) that are longitudinally distributed on the plastic bar (10) at intervals, wherein three longitudinal grooves (11) are formed on the outer surface of the plastic bar (10) at an identical interval in the annular direction; the first group of fiber bragg gratings (21) and the second group of fiber bragg gratings (22) are formed by three fiber bragg gratings (20) that are fixed in the three longitudinal grooves (11) respectively; every two fiber bragg gratings (20) in each longitudinal groove (11) are connected in series, and are connected in series with a leading-out tail optical fiber (23) extended out of the longitudinal end of the plastic bar (10). The fiber bragg grating bending sensor has the characteristics of high sensitivity and high electromagnetic interference resistance, is corrosion resistance, and can be used outdoors to measure in a multi-point distributing way; has reliable measuring signal and remote transmission distance, and facilitates establishing remote safety monitoring system; and removes the influence of the temperature on the curvature measurement.
Description
Technical field
The utility model relates to sensor, particularly a kind of fiber grating bend sensor that is used for the monitoring of flexible anti protecting wire net stress deformation.
Background technology
The fiber grating bend sensor is compared with traditional electrical sensor and is had many good qualities, like passive nothing electricity, and light weight, volume is little; Install and use anti-strong electromagnetic, long distance of signal transmission out of doors; Can realize the multiple spot distributed measurement, therefore, receive much attention at sensory field.
Because China is a mountain region big country, disasteies such as avalanche, Rolling Stone have been brought tremendous loss and security threat to transportation by railroad for a long time.Along with expanding economy, train is in continuous speed-raising, when train during at high-speed cruising, in case there is foreign matter such as Rolling Stone to invade railway clearance, if the train operator can not in time find dangerous situation, causes serious derail accident easily, even causes huge disaster.Be installed in railway passive flexible anti protecting wire net along both side; Owing to have enough intensity and flexibility; Be commonly used to tackle foreign body intrusion railway clearances such as Rolling Stone, the fiber grating bend sensor be installed through supporting rope on passive flexible anti protecting wire net, can monitoring protection net Rolling Stone to impact distortion down big or small; Thereby judge the size of the impact energy of invading Rolling Stone and the state that impacts the back protection network, the safety monitoring system along the line for railway provides master data.
26 the 7th phases of volume of " optics journal " July in 2006 disclose a kind of bend sensor based on four-core optical fiber; This optical fibre bending sensor adopts one section four-core optical fiber as sensing unit; Four fibre cores form the interference grid of period profile as one four beam-interferometer in optical fiber exit end far field, utilize moving of grid light field to measure the bending curvature radius; The identification difficulty of this sensor signal; Be not suitable for the real-time monitoring of instrument, and light source and detection be arranged in the optical fiber two ends, measure inconvenient.
" photon journal " 2011 40 the 2nd phases of volume disclose a kind of optical fibre bending sensor of interfering based on Michelson; This optical fibre bending sensor is the fibre ribbon that two optical fiber are formed to be fixed in produce the Michelson interference signal on the elastic bending structure, fills microlaser cavity with the optical fiber index-matching fluid, adopts the phase generated carrier technology that the phase interference signal is carried out modulation and demodulation; Realization is to the measurement of curvature; This sensor bulk is little, light weight, and resolution is high; But measuring system is complicated, is not suitable for the multiple spot distributed measurement.
The application for a patent for invention prospectus of number of patent application 200510024426.1, publication number CN1664495 discloses a kind of bend sensor of measuring bending curvature and bending direction simultaneously; This bend sensor employing method is respectively with three mutual cascades of LPFG with single-mode fiber; Wherein two LPFGs intersect 45 degree angles each other to the sensitive direction of bending; It is little to have volume, and cost is low, is prone to imbed characteristics such as tested engineering structure; But there are complex structure and the deficiency of making difficulty, and are not suitable for abominable outdoor environment.
A kind of bend sensor is also disclosed in the application for a patent for invention prospectus of number of patent application 200810171597.0, publication number CN101424509; This bend sensor is realized the measurement to bending through diverse location place on the Width on the side that a plurality of strain sensors is arranged in base component and the plural diverse location that is disposed on the thickness direction of base component; Because what the strain sensor of this sensor adopted is resistance strain gage; Therefore this structure does not possess anti-electromagnetic interference (EMI), corrosion-resistant, the ability of multiple spot distributed measurement.
The utility model content
The utility model technical matters to be solved provides a kind of fiber grating bend sensor that is used for the monitoring of flexible anti protecting wire net stress deformation; Have characteristics highly sensitive, anti-strong electromagnetic; And corrosion-resistant, use in the environment out of doors, and realize the multiple spot distributed measurement easily.
It is following that the utility model solves the technical scheme that its technical matters adopted:
The utility model is used for the fiber grating bend sensor of flexible anti protecting wire net stress deformation monitoring; It is characterized in that: it comprises that hoop equi-spaced apart on its outside surface offers the sticking plaster of three longitudinal flutings; And first group of fiber grating, second group of fiber grating of laying along sticking plaster longitudinal separation; First group of fiber grating, second group of fiber grating respectively are made up of three fiber gratings that are individually fixed in three longitudinal flutings; Two fiber grating serial connections in each bar longitudinal fluting, and be serially connected with the tail optical fiber of drawing that extends the vertical end of sticking plaster.
The beneficial effect of the utility model is, and is highly sensitive, and anti-strong electromagnetic is corrosion-resistant, uses in the environment out of doors, realizes the multiple spot distributed measurement; Measuring-signal is reliable, and long transmission distance is convenient to make up the telesecurity monitoring system; Adopt differential mode to carry out temperature compensation, eliminate the influence of temperature, improved measurement sensitivity simultaneously the measurement of bending.
Description of drawings
This instructions comprises following two width of cloth accompanying drawings:
Fig. 1 is the cross-sectional configuration synoptic diagram that the utility model is used for the fiber grating bend sensor of flexible anti protecting wire net stress deformation monitoring;
Fig. 2 is the cut-open view along A-A line among Fig. 1.
Parts shown in the figure, toponym and pairing mark: sticking plaster 10, longitudinal fluting 11, encapsulated layer 12, fiber grating 20, first group of fiber grating 21, second group of fiber grating 22, draw tail optical fiber 23, pipe adapter 30.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
See figures.1.and.2; The utility model is used for the fiber grating bend sensor of flexible anti protecting wire net stress deformation monitoring; It comprises that hoop equi-spaced apart on its outside surface offers the sticking plaster 10 of three longitudinal flutings 11; And first group of fiber grating laying along sticking plaster 10 longitudinal separations 21, second group of 22, the first groups of fiber grating of fiber grating 21, second group of fiber grating 22 are respectively near vertical end of sticking plaster 10.Each is made up of first group of fiber grating 21, second group of fiber grating 22 three fiber gratings 20 that are individually fixed in three longitudinal flutings 11; Two fiber gratings, 20 serial connections in each bar longitudinal fluting 11, and be serially connected with extend sticking plaster 10 vertical ends draw tail optical fiber 23.For tail optical fiber 23 is drawn in protection, to fill adhesive in the said longitudinal fluting 11 and form encapsulated layer 12, said sticking plaster 10 is provided with pipe adapter 30 at the elongated end of drawing tail optical fiber 23,
Usually, at first be separated by 120 ° longitudinal fluting 11 of three of processing on sticking plaster 10 will be connected in series two good fiber gratings 21 again and put into longitudinal fluting 11, and the glutinous agent of blended rubber is filled longitudinal fluting 11, seal and completely form encapsulated layer 12.Treat after adhesive solidifies pipe adapter 30 to be contained in an end of sticking plaster 10.Ready-made fiber grating bend sensor is installed on the last supporting rope of flexible anti protecting wire net; First group of fiber grating arranging on the sticking plaster 10 21, second group of fiber grating 22 can record the bending curvature of sticking plaster 10; Thereby obtain the curved shape of sticking plaster 10, the flexural deformation size according to sticking plaster 10 obtains the distortion size of protection network under the Rolling Stone percussive action again.
The above the utility model that just explains through diagrams is used for some principles of the fiber grating bend sensor of flexible anti protecting wire net stress deformation monitoring; Be not be to the utility model be confined to shown in described concrete structure and the scope of application in; So every the modify and equivalent that might be utilized all belongs to the claim that the utility model is applied for.
Claims (3)
1. the fiber grating bend sensor that is used for the monitoring of flexible anti protecting wire net stress deformation; It is characterized in that: it comprises that hoop equi-spaced apart on its outside surface offers the sticking plaster (10) of three longitudinal flutings (11); And first group of fiber grating (21), the second group of fiber grating (22) laid along sticking plaster (10) longitudinal separation; First group of fiber grating (21), second group of fiber grating (22) respectively are made up of three fiber gratings (20) that are individually fixed in three longitudinal flutings (11); Two fiber gratings (20) serial connection in each bar longitudinal fluting (11), and be serially connected with extend the vertical end of sticking plaster (10) draw tail optical fiber (23).
2. the fiber grating bend sensor that is used for the monitoring of flexible anti protecting wire net stress deformation as claimed in claim 1, it is characterized in that: said sticking plaster (10) is provided with pipe adapter (30) at the elongated end of drawing tail optical fiber (23).
3. according to claim 1 or claim 2 the fiber grating bend sensor that is used for flexible anti protecting wire net stress deformation monitoring is characterized in that: fill adhesive in the said longitudinal fluting (11) and form encapsulated layer (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204947801U CN202329571U (en) | 2011-12-02 | 2011-12-02 | Fiber bragg grating curvature sensor for monitoring stress deformation of flexible protective screening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204947801U CN202329571U (en) | 2011-12-02 | 2011-12-02 | Fiber bragg grating curvature sensor for monitoring stress deformation of flexible protective screening |
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| Publication Number | Publication Date |
|---|---|
| CN202329571U true CN202329571U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204947801U Expired - Lifetime CN202329571U (en) | 2011-12-02 | 2011-12-02 | Fiber bragg grating curvature sensor for monitoring stress deformation of flexible protective screening |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975746A (en) * | 2012-12-31 | 2013-03-20 | 北京佳讯飞鸿电气股份有限公司 | Tunnel foreign body monitoring system for railway disaster prevention |
| CN103852089A (en) * | 2014-03-29 | 2014-06-11 | 吉林大学 | Plastic optical fiber sensor with multi-tapered hole bent structure |
| CN103985225A (en) * | 2013-02-08 | 2014-08-13 | 同方威视技术股份有限公司 | Intelligent monitoring system for flexible passive protective net |
| CN106226882A (en) * | 2016-09-06 | 2016-12-14 | 国网山东省电力公司淄博供电公司 | Tail optical fiber special utility protecting pipe |
| WO2019127808A1 (en) * | 2017-12-27 | 2019-07-04 | 武汉华星光电半导体显示技术有限公司 | Flexible display device and method for obtaining bending state information of flexible display panel |
| CN111504218A (en) * | 2020-04-28 | 2020-08-07 | 兰州大学 | Method for monitoring large deformation of submarine pipeline structure by quasi-distributed fiber grating sensor |
-
2011
- 2011-12-02 CN CN2011204947801U patent/CN202329571U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975746A (en) * | 2012-12-31 | 2013-03-20 | 北京佳讯飞鸿电气股份有限公司 | Tunnel foreign body monitoring system for railway disaster prevention |
| CN103985225A (en) * | 2013-02-08 | 2014-08-13 | 同方威视技术股份有限公司 | Intelligent monitoring system for flexible passive protective net |
| CN103985225B (en) * | 2013-02-08 | 2016-12-28 | 同方威视技术股份有限公司 | Flexible passive protection net intelligent monitor system |
| CN103852089A (en) * | 2014-03-29 | 2014-06-11 | 吉林大学 | Plastic optical fiber sensor with multi-tapered hole bent structure |
| CN106226882A (en) * | 2016-09-06 | 2016-12-14 | 国网山东省电力公司淄博供电公司 | Tail optical fiber special utility protecting pipe |
| WO2019127808A1 (en) * | 2017-12-27 | 2019-07-04 | 武汉华星光电半导体显示技术有限公司 | Flexible display device and method for obtaining bending state information of flexible display panel |
| CN111504218A (en) * | 2020-04-28 | 2020-08-07 | 兰州大学 | Method for monitoring large deformation of submarine pipeline structure by quasi-distributed fiber grating sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |