CN107490360A - Fiber grating settlement monitor is miniaturized - Google Patents
Fiber grating settlement monitor is miniaturized Download PDFInfo
- Publication number
- CN107490360A CN107490360A CN201610418701.6A CN201610418701A CN107490360A CN 107490360 A CN107490360 A CN 107490360A CN 201610418701 A CN201610418701 A CN 201610418701A CN 107490360 A CN107490360 A CN 107490360A
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- Prior art keywords
- optical fiber
- fiber grating
- grating
- fiber
- settlement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
Abstract
The present invention relates to one kind to be miniaturized fiber grating settlement monitor, it includes the multiple fiber Bragg grating strain sensors being linked in sequence by connecting optical fiber, fiber Bragg grating strain sensor includes deformation tube, two optical fiber grating sensing parts, optical fiber grating sensing part is installed on inside deformation tube by support member, and two optical fiber grating sensing parts are connected by optical fiber coupling component.The miniaturization fiber grating settlement monitor installation of the present invention and convenient disassembly, repeat and recycle, can auto-real-time monitoring solum settlement value in construction tunnel.
Description
Technical field
The present invention relates to one kind to be miniaturized fiber grating settlement monitor, belongs to automatic sedimentation monitoring, fiber grating field,
Particularly for tunnel vault settlement monitoring.
Background technology
It when bored tunnel excavates, can not realize that the sedimentation to tunnel soil layer is monitored in real time, obtain settling data.It is existing
Automatic sedimentation monitor mainly use Fiber Bragg Grating technology and hydrostatic level technology, but this two classes settlement monitor has not
The characteristics of monitoring can continuously be extended forward, the shortcomings of layout difficulty is higher, and cost is higher.
Vault settlement is the important content of subterranean tunnel deformation monitoring, and Vault settlement existing method has contact measurement and non-connect
Measurement is touched, contact measurement has：Spirit level coordinates invar to hang chi method, spirit level suspension steel ruler method, the spirit level measurement of falling chi；It is non-contact
Measurement has：Total powerstation combination reflecting piece Bar Method.Also there are some all automatic measurement systems：The dynamic of Ba Saite systems and total powerstation
Monitoring system.
Hydrostatic level is a kind of high-accuracy liquid level measuring system, and the system is applied to the relative settlement of measurement multiple spot.
In use, the container of multiple hydrostatic levels is coupled with fluid-through tube, the liquid level of each container is measured by magnetostriction type sensor,
The float position of sensor synchronously changes with the change of liquid level, thus can measure the liquid level variable quantity of each measuring point.In static(al) water
In the system of quasi- instrument, the vertical displacement of all measuring points is changed relative to (being called datum mark) more therein, the point
Vertical displacement is relative constancy or otherwise can accurately determined, to accurately calculate static level instrument system
The sedimentation variable quantity of each measuring point, the sensor that telescopic hydrostatic level uses is new one developed using magnetostriction principle
Product is measured for high-precision liquid level, is a kind of contact-free level measurement sensor.The sensor has high-resolution, high-precision
Degree, high stability, high reliability, response time are fast, the advantages that long working life.
The shortcomings that existing hydrostatic level：
1st, can be only installed at outside construction environment, it is impossible in construction area；
2nd, it is larger by construction infection, it is more inaccurate to survey data；
3rd, cost is higher, and maintenance cost is larger.
Fiber grating automatic sedimentation monitor is using the principle of fiber grating earth pressure sensor, sinking measured by it
Soil pressure of the drop data essentially from soil layer top.Fiber grating earth pressure sensor is by dynamometry grating and temperature-compensating grating
A disc type shell structure is constituted, both ends are connected by grating port with input-output optical fiber, pass through fiber grating modulatedemodulate
Adjust instrument to measure the wavelength change of dynamometry grating and temperature-compensating grating, obtain the corresponding relation of soil pressure and wavelength change, so as to
Obtain real soil pressure force value.
The shortcomings that prior art：
1st, what is measured is limited in scope, it is impossible to continuously extension measurement forward；
2nd, fiber grating does not carry out armouring, big by external environment influence, particularly in tunnel construction environment；
3rd, shift larger during use, measurement data is had a great influence, data are inaccurate；
4th, it is soil pressure force data to measure the data obtained, it is impossible to reflects solum settlement data.
The content of the invention
To solve the above problems, it is an object of the invention to design a kind of miniaturization fiber grating settlement monitor.
The technical solution adopted in the present invention is：
A kind of miniaturization fiber grating settlement monitor 6 is provided, including armouring shell 8 and by connect optical fiber be linked in sequence it is more
Individual fiber Bragg grating strain sensor 9, it is characterised in that：Each fiber Bragg grating strain sensor includes 2, two optical fiber light of deformation tube
Grid sensing element 1,7, optical fiber grating sensing part is installed on inside deformation tube 2 by support member 3, two optical fiber grating sensings
Connected between part by optical fiber coupling component 10.
A kind of miniaturization fiber grating settlement monitor 6 as described above, it is characterised in that：Deformation tube 2 uses software coupling
Trap pipe, connection optical fiber use single mode single armoured cable.
A kind of miniaturization fiber grating settlement monitor 6 as described above, it is characterised in that：Deformation tube 2 can use ABS
Plastic outer tube, optical fiber grating sensing part can use armored fiber optic grating, and support member 3 includes pulley, ABS plastic outer tube wall
Provided with groove, the pulley of support member can be embedded in groove.
Beneficial effects of the present invention are as follows：
1st, cost is relatively low, installation and convenient disassembly, repeats and recycles, using simple；
2nd, it can be arranged in construction tunnel, realize auto-real-time monitoring solum settlement value；
3rd, the position of monitoring can not manually be realized by solving, and be truly realized automatic monitoring；
4th, the sedimentation value energy real-time instruction tunnel excavation construction of soil layer, reduces construction risk, really realizes information-aided construction.
A kind of miniaturization fiber grating settlement monitor of the present invention, do not applied by the section size in tunnel and inside during monitoring
Work influences, and efficiency high is easy to operate, and securely and reliably, precision is high, saves manpower and cost, can monitor the sedimentation of vault at any time, real
When observe Vault settlement change, it is ensured that the progress of construction safety.
Brief description of the drawings
Fig. 1：Optical fiber grating sensing section figure；
Fig. 2：Optical fiber grating sensing part scheme of installation；
Fig. 3：Optical fiber grating sensing block diagram；
Fig. 4：Optical fiber grating sensing part deformation schematic diagram；
Fig. 5：Fiber grating settlement monitor schematic diagram.
Embodiment
As Figure 1-5, figure includes：Armouring shell 8, optical fiber grating sensing part 1,7, deformation tube 2, support member 3,
Fiber Bragg grating strain sensor 9, miniaturization fiber grating settlement monitor 6, optical fiber coupling component 10.
The embodiment of the present invention such as the following specifically describes：
The present invention provides a kind of miniaturization fiber grating settlement monitor 6, including armouring shell 8 and is connected by connecting optical fiber order
The multiple fiber Bragg grating strain sensors 9 connect, wherein, each fiber Bragg grating strain sensor includes 2, two optical fiber light of deformation tube
Grid sensing element 1,7, optical fiber grating sensing part is installed on inside deformation tube 2 by support member 3, two optical fiber grating sensings
Connected between part by optical fiber coupling component 10.
A kind of miniaturization fiber grating settlement monitor 6 of the present invention, deformation tube can use software coupling sleeve pipe, connection
Optical fiber uses single mode single armoured cable.
A kind of miniaturization fiber grating settlement monitor 6 of the present invention, deformation tube 2 can specifically use ABS plastic outer tube,
Optical fiber grating sensing part can use armored fiber optic grating, support member 3) include pulley, ABS plastic outer tube wall can be provided with
Groove, the pulley of support member can be embedded in groove.
A kind of miniaturization fiber grating settlement monitor 6 of the present invention, specifically using Fiber Bragg Grating technology, utilizes miniature light
Fine grating settlement monitor carries out automatic monitoring, automatic data collection to solum settlement.
The mini optical fibre grating settlement monitor researched and developed using Fiber Bragg Grating technology, each fiber grating deformation tube contain two
Individual fiber grating, caused angle when can be used to calculate deformation tube by external force, this angle variable quantity are one relative to initial value
Variable quantity.It is on the occasion of conversely, being negative value to define deformation tube rotated counterclockwise by angle first.Fig. 4 is caused by before and after by external force
Angle change schematic diagram.
Mini optical fibre grating settlement monitor has high-res, high stability, not by Electromagnetic Interference and can multiple spot string
The advantages of being connected on a transmission lines, its operation principle are to calculate the displacement of end points by the anglec of rotation between two rigid bodies is measured
Amount, and nationality is solved because of the installation question in the limitation of space by miniaturized design.
The specification of mini optical fibre grating settlement monitor is as follows：
Fibre-optical splice form：FC/APC, SC/APC；
Connection line of optic fibre pattern：3mm optical fiber house lines；
Fiber lengths：0.5m、1m、1.5m、2.0m、2.5m、3.0m；
Operation temperature：-20~80℃.
A kind of miniaturization fiber grating settlement monitor as described above, specifically used method include：
1. mini optical fibre grating settlement monitor sensor is fixed in vault soil layer to be onstructed, with construction direction soil layer most in
End sensor is as datum mark；
2. along direction is excavated, one group of sensor arranges 8 optical fiber grating sensing test points altogether.
3. maiden trial, using 2 groups of optical fiber settlement sensors, 2 groups of sensors alternately push away forward when being excavated forward with construction
Enter installation monitoring, detection length is 6 meters in soil layer to be onstructed.
Grating pipe combination matching track pipe is inserted into interior soil layer, and when settling generation, the sedimentation close to outside soil layer becomes
Change be more than inside, internally the part shown in inframe does not shift substantially, therefore be based on this Settlement Model, other sensors and
The relative change of native inner side basic point sensor, the displacement of each monitoring point can be calculated.
My company under undertaking the construction of No. 14 lines 10 of Beijing Metro and marking when wearing No. 5 line cattail pollen elms stations, Yin Anpu sections and cattail pollen elm
Most thin part only has 34.8cm between standing, under wear construction in there is great risk, raft foundation stress 3mm, so being arranged
For superfine risk source.In wearing construction under, we employ settles automatic prison by the way that Fiber Bragg Grating technology research and development are successfully advanced
Robot is surveyed, the core component of advanced settlement automatic monitoring robot is miniaturization fiber grating settlement monitor, and it overcomes
The shortcomings that Fiber Bragg Grating technology and static level technology, in boring construction tunnel, realize auto-real-time monitoring soil layer and sink
Depreciation, Monitoring Data is provided to pass through superfine risk source, is truly realized information-aided construction, it is finally logical with " zero sedimentation "
This superfine risk source is crossed.
Described above is only the preferred embodiment of the present invention, it should be understood that the present invention is not limited to described herein
Form, it is not to be taken as the exclusion to other embodiment.And the change and change that those skilled in the art are carried out do not depart from the present invention
Spirit and scope, then all should be in the protection domain of appended claims of the present invention.
Claims (3)
1. one kind miniaturization fiber grating settlement monitor（6）, including armouring shell（8）And be linked in sequence by connecting optical fiber
Multiple fiber Bragg grating strain sensors（9）, it is characterised in that：Each fiber Bragg grating strain sensor include deformation tube (2), two
Optical fiber grating sensing part (1,7), optical fiber grating sensing part are installed on inside deformation tube (2) by support member (3), two
Pass through optical fiber coupling component between optical fiber grating sensing part（10）Connection.
A kind of 2. miniaturization fiber grating settlement monitor according to claim 1（6）, it is characterised in that：Deformation tube (2)
Sleeve pipe is coupled using software, connection optical fiber uses single mode single armoured cable.
A kind of 3. miniaturization fiber grating settlement monitor according to claim 1（6）, it is characterised in that：Deformation tube (2)
ABS plastic outer tube can be used, optical fiber grating sensing part can use armored fiber optic grating, and support member (3) includes pulley, ABS
Plastic outer tube inwall is provided with groove, and the pulley of support member can be embedded in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610418701.6A CN107490360A (en) | 2016-06-13 | 2016-06-13 | Fiber grating settlement monitor is miniaturized |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610418701.6A CN107490360A (en) | 2016-06-13 | 2016-06-13 | Fiber grating settlement monitor is miniaturized |
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| CN107490360A true CN107490360A (en) | 2017-12-19 |
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| CN201610418701.6A Pending CN107490360A (en) | 2016-06-13 | 2016-06-13 | Fiber grating settlement monitor is miniaturized |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686612A (en) * | 2019-10-31 | 2020-01-14 | 大连理工大学 | Inclination measuring device and inclination measuring method based on shape sensor |
| CN111174757A (en) * | 2020-01-11 | 2020-05-19 | 上海应用技术大学 | Tunnel bottom plate settlement monitoring device and method |
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| CN101093187A (en) * | 2007-07-04 | 2007-12-26 | 哈尔滨工业大学 | Optical fiber, optical grating FRP intelligent anchor head, and fabricating technique |
| CN201724656U (en) * | 2010-06-24 | 2011-01-26 | 上海启鹏工程材料科技有限公司 | Device for measuring ground differential settlement |
| CN102445160A (en) * | 2011-11-09 | 2012-05-09 | 东南大学 | Long-gauge fiber grating scour sensor, manufacturing method thereof, and installation and laying method thereof, and scour monitoring system formed by long-gauge fiber grating scour sensors |
| CN102645176A (en) * | 2012-05-18 | 2012-08-22 | 哈尔滨工业大学 | High-temperature resistant FBG (fiber bragg grating) sheet type strain sensor and manufacturing method thereof |
| CN104457690A (en) * | 2013-09-12 | 2015-03-25 | 天津智树电子科技有限公司 | Sensing rod for monitoring building settlement and monitoring method using the same |
-
2016
- 2016-06-13 CN CN201610418701.6A patent/CN107490360A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101093187A (en) * | 2007-07-04 | 2007-12-26 | 哈尔滨工业大学 | Optical fiber, optical grating FRP intelligent anchor head, and fabricating technique |
| CN201724656U (en) * | 2010-06-24 | 2011-01-26 | 上海启鹏工程材料科技有限公司 | Device for measuring ground differential settlement |
| CN102445160A (en) * | 2011-11-09 | 2012-05-09 | 东南大学 | Long-gauge fiber grating scour sensor, manufacturing method thereof, and installation and laying method thereof, and scour monitoring system formed by long-gauge fiber grating scour sensors |
| CN102645176A (en) * | 2012-05-18 | 2012-08-22 | 哈尔滨工业大学 | High-temperature resistant FBG (fiber bragg grating) sheet type strain sensor and manufacturing method thereof |
| CN104457690A (en) * | 2013-09-12 | 2015-03-25 | 天津智树电子科技有限公司 | Sensing rod for monitoring building settlement and monitoring method using the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686612A (en) * | 2019-10-31 | 2020-01-14 | 大连理工大学 | Inclination measuring device and inclination measuring method based on shape sensor |
| CN110686612B (en) * | 2019-10-31 | 2020-08-25 | 大连理工大学 | Inclination measuring device and inclination measuring method based on shape sensor |
| CN111174757A (en) * | 2020-01-11 | 2020-05-19 | 上海应用技术大学 | Tunnel bottom plate settlement monitoring device and method |
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Application publication date: 20171219 |