CN101915552A - Method for measuring geogrid deformation and stress by utilizing fiber bragg grating - Google Patents
Method for measuring geogrid deformation and stress by utilizing fiber bragg grating Download PDFInfo
- Publication number
- CN101915552A CN101915552A CN 201010237688 CN201010237688A CN101915552A CN 101915552 A CN101915552 A CN 101915552A CN 201010237688 CN201010237688 CN 201010237688 CN 201010237688 A CN201010237688 A CN 201010237688A CN 101915552 A CN101915552 A CN 101915552A
- Authority
- CN
- China
- Prior art keywords
- gsz
- sensor fibre
- geogrid
- deformation
- tested
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a method for measuring geogrid deformation and stress by utilizing a fiber bragg grating, comprising the following steps: connecting a strain fiber and a sensing fiber with longitude gate or latitude gate of the measured geogrid by adopting a structural adhesive and a banding manner; laying a temperature compensation sensing fiber on the adjacent longitude gates or latitude gates of the measured geogrid; manufacturing a sensing fiber armoring structure; packing geogrid longitude gate or latitude gate laid with sensing fibers by adopting adhesive tapes after the laying of sensing fibers on the measured geogrid is finished; laying and installing the geogrid which is laid with sensing fibers and finishes protection structure in place; one end of sensing fiber bragg grating leads out and is connected with a fiber optic jumper joint to enter into a distributed fiber measuring system. The method of the invention is simple and easily operated, has low cost and can accurately measure the deformation and stress of the geogrid, and the measuring precision can satisfy project actual measuring demands.
Description
Technical field
The present invention relates to a kind of building, water conservancy of being used for, to the distortion and the stressed monitoring of GSZ, especially relate to a kind of fiber grating that utilizes and measure geogrid deformation and stressed method in the soil body reinforcement work of engineerings such as electric power, traffic.
Background technology
GSZ is widely used in building at present, water conservancy, electric power, in the soil body reinforcement work of engineerings such as traffic, but for the function performance situation of GSZ in soil body reinforcement, owing to lack effective measurement means, can not accurately assess it quantitatively, make the design of GSZ in soil body reinforcement to adopt empirical method to design according to relevant rules standard, adopt measuring method such as strainometer to attempt distortion and stressed the monitoring in the past to reinforcement GSZ in the soil body, but because the rigidity of monitoring instrument structure such as traditional strainometer own are much larger than the rigidity of reinforcement GSZ, make measurement result and actual conditions form very big error, cause in the last suchlike engineering distortion of soil body reinforced grating and the trial of stressed measurement being ended in failure, being currently available for distortion of soil body reinforced grating and stressed measuring method is blank substantially.
Summary of the invention
Goal of the invention
In order to overcome the deficiencies in the prior art, the present invention proposes a kind of fiber grating that utilizes and measures geogrid deformation and stressed method.
Technical scheme
In order to realize the foregoing invention purpose, the present invention adopts following technical scheme:
A kind of fiber grating that utilizes is measured geogrid deformation and stressed method, may further comprise the steps:
1) the tested GSZ of cleaning surface, adopt structure glue and the mode of tying up links together the Ascension or Declination Bar of strain sensing optical fiber and tested GSZ, make the Ascension or Declination Bar of strain sensing optical fiber and tested survey GSZ become the consistent integral body of compatibility of deformation; On the adjacent Ascension or Declination Bar of the Ascension or Declination Bar of tested GSZ, lay the temperature compensation sensor fibre, so that strain sensor fibre measured value is carried out the temperature correction, the measuring method structural representation as shown in Figure 1, the connected mode of sensing grating and GSZ is as shown in Figure 2;
2) make the sensor fibre sheathed structure according to the deformation characteristic different mining of tested GSZ with different grating filler and jacket structure, the rigidity of the sensor fibre that armouring forms must be much smaller than the rigidity of tested GSZ, assurance is tied up with the later GSZ rigidity of glued sensor fibre and is not mainly born by grid itself with its structure stress because of big change takes place additional sensor fibre, and its structure of sensor fibre as shown in Figure 3;
3) on the tested GSZ sensor fibre lay finish the back adopt the adhesive tape parcel lay sensor fibre GSZ through grid or dimension grid, to protect the sensor fibre of laying on it;
4) GSZ that will lay sensor fibre and finish the protection structure is laid and to be in place, and sensor fibre grating one end is drawn and connected the optical patchcord joint in order to entering the distribution type fiber-optic measuring system;
5) the sensor fibre grating be connected optical cable butt joint and insert detecting instrument, adopt the emergent property of present state-of-the-art distributing optical fiber sensing commercial measurement GSZ, the distributing optical fiber sensing technology can realize automatic measurement, can pointwise calculate the deformation characteristic of GSZ by tested geogrid strain characteristic, calculate its stressing conditions in conjunction with the deformation modulus of GSZ.
Beneficial effect of the present invention is:
1) adopt existing distributed fiber grating measuring technique to be applied to the distortion and the stressed measurement of GSZ, the present invention is simple and easy to do, cost is low, can accurately measure the distortion of GSZ and stressed, and measuring accuracy satisfies the actual measurement of engineering needs;
2) sensor fibre grating volume is little, the present invention adopts the sensor fibre grating of supporting special processing, lay to install behind the sensor fibre grid the distortion of tested GSZ and stressedly do not exert an influence substantially, the practical distortion and the stress of measurement result accurate response GSZ, and can adopt many group optical fiber or grating to carry out the data comparative analysis, improve measuring accuracy;
3) expanded the application that the distributed fiber grating sensing technology is measured.
Distributed optical fiber sensing monitoring technology based on Brillouin scattering is different with conventional monitoring technology principle, it has distributed, long distance, real-time, characteristics such as precision height and permanance are long, can accomplish each position of job facilities is monitored and monitored, compare the distributed optical fiber sensing technology of traditional monitoring technology and have following characteristics: (1) fiber grating collection sensor and transmission medium are the whole body, easy for installation, be easy to constitute automatic monitoring system, the cost performance height, (2) can carry out the space continuous coverage of optical fiber arbitrfary point along the line, measuring distance is long, scope is big, contain much information, reduce the loss that the conventional port method detects greatly, (3) fiber-optic grating sensor is simple in structure, volume is little, the sensor fibre grating can be made into according to the needs of measured object various diameters (the distributed fiber grating sensor of diameter 1mm～20mm) and different-stiffness, the physical property influence of installation being buried underground the position is very little, measures highly sensitive, anti-electromagnetic interference (EMI), anti-thunderbolt, the reliability height.
Description of drawings
Fig. 1, be geogrid deformation of the present invention and stressed measuring method structural representation;
Fig. 2, be optical fiber grid of the present invention and GSZ connection diagram;
Fig. 3, be sensor fibre structural representation of the present invention.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to following example.
Technical matters to be solved by this invention, be at current reinforcement geogrid deformation and the blank present situation that is subjected to force measuring method, make full use of distributed fiber grating sensing measurement technical characterstic, provide a kind of distributed fiber grating sensing technology of current advanced person that utilizes to measure geogrid deformation and stressed method, the distributed sensing fiber optical grating construction pattern that comprises geogrid deformation and stressed measurement, the distributed sensing fiber grating is at the mounting arrangements structural shape on GSZ surface, strain sensing fiber optic temperature compensation modification method, the sensor fibre grating is connected and gluing method with GSZ.This method is simple, and cost is very low, is adapted to the distortion of any structure pattern GSZ and is subjected to force measurement, and can realize automatic measurement, and test result shows that its measuring accuracy and accuracy are higher.
Sensor fibre diameter 4～6mm of the present invention, ultimate tensile strength (UTS) is not less than 1000N, and the ultimate deformation ability is not less than 1%, and deformation modulus is less than 10% of tested GSZ; The binder structure of described sensor fibre and GSZ is a plastic strapping tape; Described structure glue is epoxide-resin glue or similar characteristics structure glue.
The present invention utilizes fiber grating to measure geogrid deformation and stressed method, utilize the measuring accuracy height (measuring accuracy reaches as high as 1 μ ε) of current advanced person's distribution type fiber-optic measuring technique, distributed measurement (the distributed spacing 0.05m of minimum measuring point), the measurement antijamming capability is strong, measuring distance long (the longest 30km that reaches), be fit to very much the geogrid deformation of long distance on the reinforcement Geotechnical Engineering and be subjected to force measurement, measuring speed is fast, characteristics such as the sensor cost is low, realization can be filled up geogrid deformation and the blank that is subjected to force measuring method to the distortion of soil body reinforcement GSZ and stressed accurately measuring rapidly.With the present invention in indoor geogrid deformation and the stressed experiment with measuring of carrying out, full-automatic pressing machine is adopted in the stressed loading of GSZ, this full-automatic pressing machine writes down geogrid deformation and stressed automatically, adopt distribution type fiber-optic measuring system of the present invention that this group GSZ is carried out synchro measure simultaneously, totally 16 groups of contrast tests, adopt two-way stretch plastics GSZ respectively, earth grille, steel is moulded compound geogrid and polyester warp-knitting polyester GSZ, every kind of GSZ is finished 2 groups of contrast tests, wherein one group is single lattice GSZ, another group is 3 lattice GSZs, and the GSZ specimen length is respectively two kinds of 50cm and 70cm.The Total Test achievement shows that the present invention records the geogrid strain value and the full-automatic pressing machine measured value contrasts both absolute errors less than 15 μ ε, relative error is all less than 2%, illustrate that the present invention measures geogrid deformation and stressedly has a higher measuring accuracy, can satisfy the actual measurement of engineering needs fully.
Embodiment 1:
As Fig. 1, Fig. 2 and shown in Figure 3, utilize fiber grating to measure geogrid deformation and stressed method, it comprises following steps:
1) after the engineering site GSZ is laid and is finished, tested grid position grid surface is cleaned, on tested grid, lay strain and temperature compensation sensor fibre, with plastic strapping tape sensor fibre is banded in grid surface, making two these tight gluings at optical fiber and GSZ fundamental plane brush configuration glue again after strain sensing optical fiber is tied up and finished is an integral body, to guarantee both compatibility of deformation unanimities, as Fig. 1 and Fig. 2;
2) the optical patchcord joint is drawn and connected to sensor fibre in order to entering the distribution type fiber-optic measuring system from an end;
3) with the jumper terminal of strain and temperature compensation sensor fibre be connected optical cable and link to each other, optical cable links to each other with the distribution type fiber-optic surveying instrument, adopt current advanced person's distributed fiber grating measuring technique to measure geogrid strain and distortion, stressed by recording grid strain calculating GSZ.
Embodiment 2:
Substantially the same manner as Example 1, difference is sensor fibre and GSZ are tied up and gluedly to be transported to the laying that GSZ is carried out at the scene again after together indoor.
Embodiment 3:
Substantially the same manner as Example 1, difference is at first sensor fibre to be implanted and is transported to the laying that GSZ is carried out at the scene in the earth grille again.
Embodiment 4:
Substantially the same manner as Example 1, difference is that measured GSZ is transformed into steel by two-way stretch plastics GSZ and moulds GSZ.
Embodiment 5:
Substantially the same manner as Example 1, difference is that measured GSZ is transformed into polyester warp-knitting polyester GSZ by two-way stretch plastics GSZ.
Claims (2)
1. utilize fiber grating to measure geogrid deformation and stressed method, it is characterized in that, may further comprise the steps:
1) the tested GSZ of cleaning surface, adopt structure glue and the mode of tying up links together the Ascension or Declination Bar of strain sensing optical fiber and tested GSZ, make the Ascension or Declination Bar of strain sensing optical fiber and tested survey GSZ become the consistent integral body of compatibility of deformation; On the adjacent Ascension or Declination Bar of the Ascension or Declination Bar of tested GSZ, lay the temperature compensation sensor fibre, so that strain sensor fibre measured value is carried out the temperature correction;
2) make the sensor fibre sheathed structure, according to the deformation characteristic different mining of tested GSZ with different grating filler and jacket structure, the rigidity of the sensor fibre that armouring forms must guarantee to tie up with the later GSZ rigidity of glued sensor fibre and mainly do not born by grid itself with its structure stress because of big change takes place additional sensor fibre much smaller than the rigidity of tested GSZ;
3) on the tested GSZ sensor fibre lay finish the back adopt the adhesive tape parcel lay sensor fibre GSZ through grid or dimension grid, to protect the sensor fibre of laying on it;
4) GSZ that will lay sensor fibre and finish the protection structure is laid and to be in place, and sensor fibre grating one end is drawn and connected the optical patchcord joint in order to entering the distribution type fiber-optic measuring system;
5) the sensor fibre grating be connected optical cable butt joint and insert detecting instrument, adopt the emergent property of distributing optical fiber sensing commercial measurement GSZ, the distributing optical fiber sensing technology can realize automatic measurement, can pointwise calculate the deformation characteristic of GSZ by tested geogrid strain characteristic, calculate its stressing conditions in conjunction with the deformation modulus of GSZ.
2. utilize fiber grating to measure geogrid deformation and stressed method, it is characterized in that described sensor fibre diameter 4～6mm; Ultimate tensile strength (UTS) is not less than 1000N; The ultimate deformation ability is not less than 1%; Deformation modulus is less than 10% of tested GSZ; The binder structure of described sensor fibre and GSZ is a plastic strapping tape; Described structure glue is epoxide-resin glue or similar characteristics structure glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010237688 CN101915552A (en) | 2010-07-23 | 2010-07-23 | Method for measuring geogrid deformation and stress by utilizing fiber bragg grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010237688 CN101915552A (en) | 2010-07-23 | 2010-07-23 | Method for measuring geogrid deformation and stress by utilizing fiber bragg grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101915552A true CN101915552A (en) | 2010-12-15 |
Family
ID=43323118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010237688 Pending CN101915552A (en) | 2010-07-23 | 2010-07-23 | Method for measuring geogrid deformation and stress by utilizing fiber bragg grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101915552A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995619A (en) * | 2012-12-28 | 2013-03-27 | 泰安路德工程材料有限公司 | Highly smart LDTG composite geotechnical material and engineering monitoring system thereof |
| CN103292719A (en) * | 2012-03-20 | 2013-09-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Method using distributed type optical fibers to measure stress structure deformation and stress of geotechnical cloth |
| CN103469782A (en) * | 2013-09-23 | 2013-12-25 | 山东浩珂矿业工程有限公司 | Fiber bragg grating compound dacron geogrid and preparation method thereof |
| CN104139541A (en) * | 2014-06-25 | 2014-11-12 | 山东大学 | Method for preparing sensing type plastic geogrids |
| CN104406536A (en) * | 2014-12-05 | 2015-03-11 | 浙江大学 | Device and method for testing deflection distribution of pile-net structured geogrid |
| CN106500868A (en) * | 2016-10-26 | 2017-03-15 | 上海市政工程设计研究总院（集团）有限公司 | Dykes and dams and the dykes and dams monitoring internal temperature system based on distribution type fiber-optic |
| CN106500867A (en) * | 2016-10-26 | 2017-03-15 | 上海市政工程设计研究总院（集团）有限公司 | The installation method of dykes and dams monitoring internal temperature system |
| CN106931896A (en) * | 2017-03-31 | 2017-07-07 | 四川大学 | The optical fiber sensing technology and system of geomembrane anti-seepage earth and rockfill dam deformation monitoring |
| CN107843203A (en) * | 2017-10-13 | 2018-03-27 | 同济大学 | The implementation method of base pit engineering three-dimensional monitoring network based on distributed fiberoptic sensor |
| CN108072330A (en) * | 2018-01-15 | 2018-05-25 | 河海大学 | Deformation of pile foundation distributed test system and test method under dynamic loading |
| CN108547203A (en) * | 2018-04-23 | 2018-09-18 | 河海大学 | Bituminous paving DEFORMATION MONITORING SYSTEM based on OFDR and application method |
| CN108612132A (en) * | 2018-05-11 | 2018-10-02 | 河海大学 | Based on the bridge anti-scouring system and installation method from sensing FRP grids |
| CN110685289A (en) * | 2019-10-21 | 2020-01-14 | 山东大学 | Geogrid capable of monitoring slope deformation |
| CN111366093A (en) * | 2020-03-02 | 2020-07-03 | 哈尔滨工业大学 | Multifunctional distributed optical fiber sensor for road strain test and heat conduction snow melting |
| CN113503826A (en) * | 2021-06-02 | 2021-10-15 | 韦丽珍 | Geogrid deformation stress measurement sensing optical fiber bundling auxiliary device |
| CN117346679A (en) * | 2023-11-21 | 2024-01-05 | 中国水利水电科学研究院 | Device and method for calibrating covariant condition of optical fiber and soil body |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527959Y (en) * | 2002-02-15 | 2002-12-25 | 燕山大学 | Fibre-optical strain sensor for embedded concrete structure |
| JP2003232631A (en) * | 2002-02-08 | 2003-08-22 | Tobishima Corp | Ground deformation measuring system with optical fiber sensor |
| CN2636238Y (en) * | 2003-07-03 | 2004-08-25 | 香港理工大学 | Cement structure strain measuring sensor with temp. compensation |
| JP2006133087A (en) * | 2004-11-05 | 2006-05-25 | Mitsubishi Heavy Ind Ltd | Deformation monitoring device and deformation monitoring method |
| CN101660899A (en) * | 2009-09-15 | 2010-03-03 | 中国第一冶金建设有限责任公司 | Method for detecting deformation and internal force of H-shaped steel under the ground by utilizing optical fiber |
-
2010
- 2010-07-23 CN CN 201010237688 patent/CN101915552A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003232631A (en) * | 2002-02-08 | 2003-08-22 | Tobishima Corp | Ground deformation measuring system with optical fiber sensor |
| CN2527959Y (en) * | 2002-02-15 | 2002-12-25 | 燕山大学 | Fibre-optical strain sensor for embedded concrete structure |
| CN2636238Y (en) * | 2003-07-03 | 2004-08-25 | 香港理工大学 | Cement structure strain measuring sensor with temp. compensation |
| JP2006133087A (en) * | 2004-11-05 | 2006-05-25 | Mitsubishi Heavy Ind Ltd | Deformation monitoring device and deformation monitoring method |
| CN101660899A (en) * | 2009-09-15 | 2010-03-03 | 中国第一冶金建设有限责任公司 | Method for detecting deformation and internal force of H-shaped steel under the ground by utilizing optical fiber |
Non-Patent Citations (1)
| Title |
|---|
| 《工程地质学报》 20100630 王宝军，李科，施斌，魏广庆 边坡变形的分布式光纤监测模拟试验研究 , 第3期 2 * |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103292719B (en) * | 2012-03-20 | 2016-02-17 | 水利部交通运输部国家能源局南京水利科学研究院 | Distribution type fiber-optic is utilized to measure the distortion of geotextile force structure and stressed method |
| CN103292719A (en) * | 2012-03-20 | 2013-09-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Method using distributed type optical fibers to measure stress structure deformation and stress of geotechnical cloth |
| CN102995619A (en) * | 2012-12-28 | 2013-03-27 | 泰安路德工程材料有限公司 | Highly smart LDTG composite geotechnical material and engineering monitoring system thereof |
| CN103469782A (en) * | 2013-09-23 | 2013-12-25 | 山东浩珂矿业工程有限公司 | Fiber bragg grating compound dacron geogrid and preparation method thereof |
| CN103469782B (en) * | 2013-09-23 | 2015-11-18 | 浩珂科技有限公司 | The preparation method of fiber grating compound dacron geogrid |
| CN104139541A (en) * | 2014-06-25 | 2014-11-12 | 山东大学 | Method for preparing sensing type plastic geogrids |
| CN104139541B (en) * | 2014-06-25 | 2016-02-10 | 山东大学 | A kind of preparation method of sensing type Plastics Geogrids |
| CN104406536B (en) * | 2014-12-05 | 2017-04-05 | 浙江大学 | The test device and method of pile net structure GSZ amount of deflection distribution |
| CN104406536A (en) * | 2014-12-05 | 2015-03-11 | 浙江大学 | Device and method for testing deflection distribution of pile-net structured geogrid |
| CN106500867A (en) * | 2016-10-26 | 2017-03-15 | 上海市政工程设计研究总院（集团）有限公司 | The installation method of dykes and dams monitoring internal temperature system |
| CN106500868A (en) * | 2016-10-26 | 2017-03-15 | 上海市政工程设计研究总院（集团）有限公司 | Dykes and dams and the dykes and dams monitoring internal temperature system based on distribution type fiber-optic |
| CN106931896A (en) * | 2017-03-31 | 2017-07-07 | 四川大学 | The optical fiber sensing technology and system of geomembrane anti-seepage earth and rockfill dam deformation monitoring |
| CN107843203B (en) * | 2017-10-13 | 2019-12-27 | 同济大学 | Method for realizing foundation pit engineering three-dimensional monitoring network based on distributed optical fiber sensor |
| CN107843203A (en) * | 2017-10-13 | 2018-03-27 | 同济大学 | The implementation method of base pit engineering three-dimensional monitoring network based on distributed fiberoptic sensor |
| CN108072330A (en) * | 2018-01-15 | 2018-05-25 | 河海大学 | Deformation of pile foundation distributed test system and test method under dynamic loading |
| CN108547203A (en) * | 2018-04-23 | 2018-09-18 | 河海大学 | Bituminous paving DEFORMATION MONITORING SYSTEM based on OFDR and application method |
| CN108612132A (en) * | 2018-05-11 | 2018-10-02 | 河海大学 | Based on the bridge anti-scouring system and installation method from sensing FRP grids |
| CN110685289A (en) * | 2019-10-21 | 2020-01-14 | 山东大学 | Geogrid capable of monitoring slope deformation |
| CN111366093A (en) * | 2020-03-02 | 2020-07-03 | 哈尔滨工业大学 | Multifunctional distributed optical fiber sensor for road strain test and heat conduction snow melting |
| CN111366093B (en) * | 2020-03-02 | 2021-10-19 | 哈尔滨工业大学 | Multifunctional distributed optical fiber sensor for road strain test and heat conduction snow melting |
| CN113503826A (en) * | 2021-06-02 | 2021-10-15 | 韦丽珍 | Geogrid deformation stress measurement sensing optical fiber bundling auxiliary device |
| CN117346679A (en) * | 2023-11-21 | 2024-01-05 | 中国水利水电科学研究院 | Device and method for calibrating covariant condition of optical fiber and soil body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101915552A (en) | Method for measuring geogrid deformation and stress by utilizing fiber bragg grating | |
| CN102140796B (en) | Intelligent fiber reinforced plastic (FRP) anchor rod | |
| CN103821507B (en) | Shaft wall distortion distribution type fiber-optic detection method | |
| CN1888330B (en) | Bored concrete pile foundation distributing optical fiber sensing detecting method | |
| CN103292719B (en) | Distribution type fiber-optic is utilized to measure the distortion of geotextile force structure and stressed method | |
| Mohamad et al. | Behaviour of an old masonry tunnel due to tunnelling-induced ground settlement | |
| CN102384725B (en) | Tunnel convergence deformation distribution fiber monitoring method and system thereof | |
| CN101245990B (en) | Full-dimension distributed and partial high-precision co-linear optical fiber sensing method | |
| CN106595918B (en) | A kind of long term monitoring device and method of the outer soil pressure of duct pieces of shield tunnel | |
| CN204854648U (en) | Distributed optical fiber is used for monitoring devices that panel dam comes to nothing | |
| CN101788352B (en) | Composite fiber detection module and device | |
| Moser et al. | Long-term monitoring of reinforced earth structures using distributed fiber optic sensing | |
| CN101900533A (en) | Optical fiber grating measurement method for monitoring embankment section settlement | |
| Ma et al. | A review of previous studies on the applications of fiber optic sensing technologies in geotechnical monitoring | |
| CN108072330A (en) | Deformation of pile foundation distributed test system and test method under dynamic loading | |
| CN105971647A (en) | Multifunctional fiber reinforced plastic (FRP) intelligent anchor rod having single-point temperature compensation function and manufacturing method thereof | |
| CN213208933U (en) | Integrally prefabricated and rapidly assembled distributed optical fiber soil deformation sensor | |
| CN104406536B (en) | The test device and method of pile net structure GSZ amount of deflection distribution | |
| CN201051164Y (en) | Enhanced compound intelligent bar for optical fiber grating fiber | |
| CN114322819B (en) | Fiber grating sensor, strain monitoring method and strain monitoring system for deep roadway surrounding rock | |
| CN104501732B (en) | A kind of hydro-structure distortion distributed optical fiber sensing device and method | |
| CN109958056A (en) | Smart stay cable, smart stay cable preparation method and smart stay cable safe condition detection method | |
| CN206546156U (en) | Tunnel arch top settlement monitoring device based on distribution type fiber-optic | |
| CN203732033U (en) | Distributed optical fiber measurement system for monitoring whole-section horizontal displacement of dam body | |
| CN204286374U (en) | A kind of hydro-structure distortion distributed optical fiber sensing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20101215 |