CN102288534B - Fiber grating reinforced concrete rusting sensor with temperature compensation - Google Patents
Fiber grating reinforced concrete rusting sensor with temperature compensation Download PDFInfo
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- CN102288534B CN102288534B CN2011101206277A CN201110120627A CN102288534B CN 102288534 B CN102288534 B CN 102288534B CN 2011101206277 A CN2011101206277 A CN 2011101206277A CN 201110120627 A CN201110120627 A CN 201110120627A CN 102288534 B CN102288534 B CN 102288534B
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- sensing probe
- stainless steel
- temperature compensation
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- 239000000835 fiber Substances 0.000 title claims abstract description 35
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 42
- 239000000523 sample Substances 0.000 claims abstract description 42
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 17
- 239000010935 stainless steel Substances 0.000 claims abstract description 17
- 239000004567 concrete Substances 0.000 claims abstract description 15
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- 230000003287 optical effect Effects 0.000 claims abstract description 6
- 230000007797 corrosion Effects 0.000 claims description 33
- 238000005260 corrosion Methods 0.000 claims description 33
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- 230000000694 effects Effects 0.000 abstract description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 230000002787 reinforcement Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 3
- 241000370738 Chlorion Species 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a fiber grating reinforced concrete rusting sensor with temperature compensation, which belongs to the technical field of structural engineering and fiber sensing. The sensor is characterized in that a sensing probe is made by utilizing a reinforcing steel bar applied in engineering; an encapsulating component is provided with a hole matched with the sensing probe; the sensing probe passes through the hole, and then one end of the sensing probe is in contact with concrete to form an interface of a reinforcing steel bar material and the concrete, and the other end of the sensing probe is connected with a stainless steel cushion block in the sensor; the stainless steel cushion block is in contact with a metal sheet adhered with a stain monitoring fiber grating; a spring is mounted between the stainless steel cushion block and the encapsulating component; simultaneously, a metal sheet adhered with a temperature-compensating fiber grating is placed in the sensor, so as to correct the influence of an ambient temperature on strain monitoring; and finally, a fiber is protected by an armored optical cable, and then is led out from the inside of the sensor. The sensor has the effects and advantages that the measurement precision is high; the real-time quantitative monitoring can be carried out; the interface of the reinforced concrete is not damaged; and furthermore, the temperature monitoring in a structure can be achieved synchronously.
Description
Technical field
The invention belongs to Structural Engineering and technical field of optical fiber sensing, relate to a kind of fiber grating reinforced concrete corrosion sensor that has temperature compensation.
Background technology
Fiber grating is the desirable sensing element that is used for long term monitoring; It has that high resolving power, high precision, volume are little, good endurance, anti-electromagnetic interference (EMI), can grow apart from advantages such as quasi-distributed real-time monitoring; Thereby in the monitoring structural health conditions sensing technology, have broad application prospects, especially, have the incomparable advantage of some other sensor in the occasion of measuring stress and strain; Be considered to be hopeful to be integrated in material internal in the intelligence structure most, survey the sensor of its damage.At present, more existing fiber grating is used to detect the Sensor Design scheme of the monitoring of reinforcement corrosion.
Liang Dakai, Wang Yan etc. have designed a kind of monitoring methods for reinforcement corrosion and sensor (CN200710021728) thereof of LPFG; Utilization is being pasted reinforcing bar position and is being placed a LPFG straightly; Regularly observing LPG transmitted spectrum by spectrometer changes; Judge with this whether grating bending has taken place, and infer the degree and the speed of reinforcement corrosion.This invention can be monitored the reinforcement corrosion situation in the reinforced concrete member through the LPG transmitted spectrum monitoring to imbedding.But this sensor can not be authentic and valid reaction reinforcing bar and the interface between the concrete, monitoring accuracy is not high in addition, also there is certain problem in the encapsulation of sensor, difficultly in engineering practice, uses.
Dong Sa English, Wang Hongren etc. have invented sensitive membrane Fibre Optical Sensor of a kind of real-time monitoring metal erosion and preparation method thereof (CN200410035475).It comprises metal shell and is arranged in the metal shell and is connected the measure portion of metal shell; Measure portion is made up of the FRP beam of uniform strength and two fiber gratings that are attached to FRP beam of uniform strength upper and lower surfaces; The extension line of fiber grating passes metal shell and draws; The inwall of metal shell is provided with metal baffle, is provided with calcium carbide above, and the metal shell below is provided with transmission rod; Be provided with the little rigid spring of precompressed between transmission rod one end and the metal shell inwall, the other end of transmission rod is provided with the FRP disk.But this corrosion sensor configuration is complicated, costs an arm and a leg, and reaction reinforcing bar that can not be authentic and valid and the interface between the concrete, is difficult to be applied on the reinforced concrete interface.
Therefore, though aspect the application Fiber Bragg Grating FBG monitoring corrosion correlative study is being arranged at present, the quantitatively corrosion of the inner reinforcing bar of precise monitoring xoncrete structure effectively.
Summary of the invention
The technical matters that the present invention will solve provides a kind of sensor of monitoring the reinforced concrete structure corrosion degree; Be used for monitoring because the situation of concrete carbonization or chloride permeability steel bar corrosion in the reinforced concrete structure that rebar surface caused, especially to the quantitatively monitoring in real time of extent of steel corrosion.
Technical scheme of the present invention is:
A kind of fiber grating reinforced concrete corrosion sensor that has temperature compensation comprises sensing probe, stainless steel cushion block, the sheet metal that is stained with the strain monitoring fiber grating, strain monitoring fiber grating, the sheet metal that is stained with temperature compensation optical fiber grating, temperature compensation optical fiber grating, spring, package parts and armouring optical cable.
This sensor utilizes the reinforcing bar material of practical application in the engineering to become sensing probe, utilizes corrosion-resistant, good endurance, material package parts that rigidity is high; There is a hole that is complementary with sensing probe the package parts side; Make sensing probe pass this Kong Houyi end face and can contact formation reinforcing bar material and concrete interface, and the other end of sensing probe is connected with the stainless steel cushion block that is positioned at sensor internal with concrete; The stainless steel cushion block contacts with the sheet metal that is stained with the strain monitoring fiber grating through its two fulcrums again; Mounting spring between stainless steel cushion block and package parts again; Place the sheet metal that is stained with temperature compensation optical fiber grating that not disturbed by stress at sensor internal simultaneously, revising environment temperature influences strain monitoring; Draw from sensor internal behind the last optical fiber process armouring cable protection.
In actual application, this sensor can be installed near the rebar surface, also can directly be arranged in the reinforced concrete structure protective seam.When concrete carbonization depth or chlorion arrival sensing probe position; The end generation corrosion that sensing probe contacts with concrete; Volume expanding after the sensing probe corrosion promotes sensing probe and moves to sensor internal, and then makes the sheet metal that is stained with the strain monitoring fiber grating produce distortion.The distortion situation that monitors through the strain monitoring fiber grating; Can realize Quantitative Monitoring to the sensing probe corrosion degree; Because the reinforcing bar of using in the material of sensing probe and the engineering reality is identical; Thereby can reflect accurately near the sensing probe or be in the corrosion situation of the reinforcing bar in the equivalent environment with sensing probe; Revise the influence of environment temperature through the temperature compensation optical fiber grating of sensor internal again, make monitoring steel bar corrosion simultaneously accurate more, realized the measurement of reinforced concrete structure internal temperature monitoring steel bar corrosion.This sensor medi-spring is used for resisting the impulsive force of concreting process to sensing probe, avoids in the concreting process because the excessive sensing probe that causes of impulsive force to the big displacement of sensor internal generation, causes the strain monitoring fiber grating to destroy.
Effect of the present invention and benefit are that measuring accuracy is high, can carry out near real-time quantitative monitoring to steel bar corrosion, do not destroy reinforced concrete interface and can realize the monitoring of reinforced concrete structure temperature inside synchronously.
Description of drawings
Fig. 1 is the cross sectional representation that has the fiber grating reinforced concrete corrosion sensor of temperature compensation.
Fig. 2 is the longitudinal section synoptic diagram that has the fiber grating reinforced concrete corrosion sensor of temperature compensation.
Among the figure: 1 sensing probe; 2 stainless steel cushion blocks; 3 are stained with the sheet metal of strain monitoring fiber grating; 4 strain monitoring fiber gratings; 5 are stained with the sheet metal of temperature compensation optical fiber grating; 6 temperature compensation optical fiber gratings; 7 springs; 8 package parts; 9 armouring optical cables.
Embodiment
Be described in detail embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
A kind of fiber grating reinforced concrete corrosion sensor that has temperature compensation comprises sensing probe, stainless steel cushion block, the sheet metal that is stained with the strain monitoring fiber grating, strain monitoring fiber grating, the sheet metal that is stained with temperature compensation optical fiber grating, temperature compensation optical fiber grating, spring, package parts and armouring optical cable.This sensor can be used for monitoring bridge pier, cushion cap, beam, the corrosion situation of reinforcing bar in the important structure component of thing such as post.
Existing is that example specifies with the corrosion of using reinforcing bar in the cylindrical bridge pier of this sensor monitors.At first utilize with bridge pier in the identical reinforcing bar material of steel bar stress become sensing probe, utilize stainless steel material making package parts; Open a hole that is complementary with sensing probe simultaneously in the package parts side; Make sensing probe pass this Kong Houyi end face and can contact formation reinforcing bar material and concrete interface, and the other end of sensing probe is connected with the stainless steel cushion block that is positioned at sensor internal with concrete; The stainless steel cushion block contacts with the sheet metal that is stained with the strain monitoring fiber grating through its two fulcrums again; Mounting spring between stainless steel cushion block and package parts again; Place the sheet metal that is stained with temperature compensation optical fiber grating that not disturbed by stress at sensor internal simultaneously and revise the influence of environment temperature strain monitoring; Last optical fiber is drawn from sensor internal after with the armouring cable protection.
Sensor production is fixed on rebar surface with it with thin wire after accomplishing, and fixing seasonal its sensing probe is towards the outside of cylindrical bridge pier.When concrete carbonization depth or chlorion arrival sensing probe position; The end generation corrosion that sensing probe contacts with concrete; Produce volumetric expansion after the sensing probe corrosion, promote sensing probe and move, and then make the sheet metal that is stained with the strain monitoring fiber grating produce distortion to sensor internal.The distortion situation that monitors through the strain monitoring fiber grating; Can realize Quantitative Monitoring to the sensing probe corrosion degree; Because the reinforcing bar of using in the material of sensing probe and the bridge pier is identical; Thereby can reflect accurately near the sensing probe and be in the corrosion situation of the reinforcing bar in the equivalent environment with sensing probe; Revise the influence of environment temperature through the temperature compensation optical fiber grating of sensor internal again, make monitoring steel bar corrosion simultaneously accurate more, realized the measurement of bridge pier internal temperature monitoring steel bar corrosion.This sensor medi-spring is used for resisting the impulsive force of concreting process to sensing probe, avoids in the concreting process because the excessive sensing probe that causes of impulsive force to the big displacement of sensor internal generation, causes the strain monitoring fiber grating to destroy.
Claims (1)
1. fiber grating reinforced concrete corrosion sensor that has temperature compensation; Comprise sensing probe, stainless steel cushion block, the sheet metal that is stained with the strain monitoring fiber grating, strain monitoring fiber grating, the sheet metal that is stained with temperature compensation optical fiber grating, temperature compensation optical fiber grating, spring, package parts and armouring optical cable; It is characterized in that this sensor utilizes the reinforcing bar material of practical application in the engineering to become sensing probe; There is a hole that is complementary with the sensing probe diameter package parts side; Make sensing probe pass this Kong Houyi end face and contact formation reinforcing bar material and concrete interface with concrete, and the other end of sensing probe is connected with the stainless steel cushion block that is positioned at sensor internal; The stainless steel cushion block contacts with the sheet metal that is stained with the strain monitoring fiber grating through its two fulcrums again; Mounting spring between stainless steel cushion block and package parts again; Place the sheet metal that is stained with temperature compensation optical fiber grating that not disturbed by stress at sensor internal simultaneously, revising environment temperature influences strain monitoring; Draw from sensor internal behind the last optical fiber process armouring cable protection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101206277A CN102288534B (en) | 2011-05-10 | 2011-05-10 | Fiber grating reinforced concrete rusting sensor with temperature compensation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101206277A CN102288534B (en) | 2011-05-10 | 2011-05-10 | Fiber grating reinforced concrete rusting sensor with temperature compensation |
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| Publication Number | Publication Date |
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| CN102288534A CN102288534A (en) | 2011-12-21 |
| CN102288534B true CN102288534B (en) | 2012-11-21 |
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| CN2011101206277A Expired - Fee Related CN102288534B (en) | 2011-05-10 | 2011-05-10 | Fiber grating reinforced concrete rusting sensor with temperature compensation |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928580B (en) * | 2012-11-20 | 2014-11-05 | 郑州大学 | Corrosion monitoring device and method for reinforcement bar in concrete structure |
| CN103616325B (en) * | 2013-11-27 | 2015-10-28 | 中交天津港湾工程研究院有限公司 | Light fiber sensor combination is used in a kind of steel reinforced concrete erosion monitoring |
| CN104101307B (en) * | 2014-07-24 | 2016-08-17 | 河海大学 | A kind of measurement reinforcing bar temperature, fiber grating strain meter of strain simultaneously |
| CN104483258B (en) * | 2014-12-02 | 2017-02-22 | 浙江大学 | Corrosion-fatigue testing method for reinforced concrete on basis of optical-fiber sensing and device thereof |
| CN104849200B (en) * | 2015-05-22 | 2017-10-27 | 宋世德 | A kind of FBG metal erosion sensors with temperature compensation function and preparation method thereof |
| CN105300944B (en) * | 2015-11-11 | 2018-09-28 | 中国船舶重工集团公司第七二五研究所 | A kind of concrete chloride ion corrosion fibre optical sensor and its detection method based on fluorescent quenching |
| CN105334221B (en) * | 2015-11-23 | 2017-12-26 | 天津城建大学 | New reinforcing steel bar corrosion fiber parametric amplification device |
| CN112284270B (en) * | 2020-11-09 | 2021-08-20 | 燕山大学 | Metal surface corrosion monitoring device based on fiber bragg grating self-temperature compensation |
| CN113008146A (en) * | 2021-02-26 | 2021-06-22 | 深圳大学 | Optical fiber sensing device, pipeline corrosion monitoring system and method |
| CN113089413B (en) * | 2021-04-21 | 2022-04-15 | 哈尔滨工业大学 | Intelligent dowel bar with embedded distributed optical fibers and manufacturing method thereof |
| CN113959935B (en) * | 2021-11-02 | 2023-05-19 | 燕山大学 | Reinforcing steel bar corrosion monitoring device in reinforced concrete member |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008620B (en) * | 2007-01-30 | 2010-05-19 | 南京航空航天大学 | Method for testing steel corrosion of reinforced concrete members |
| JP5182929B2 (en) * | 2008-05-21 | 2013-04-17 | 大成建設株式会社 | Reinforcing method for existing concrete structures |
| CN201331395Y (en) * | 2009-01-19 | 2009-10-21 | 北京交通大学 | Fibre grating temperature compensation transducer |
| CN101923057B (en) * | 2010-04-29 | 2012-07-04 | 大连理工大学 | BOTDR (Brillouin Optical Time-Domain Reflectometer) fiber optical corrosive sensor |
| CN202166600U (en) * | 2011-05-10 | 2012-03-14 | 大连理工大学 | Fiber grating reinforced concrete corrosion sensor with temperature compensation |
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Inventor after: Zhao Xuefeng Inventor after: Gong Peng Inventor after: Ba Qin Inventor after: Ou Jinping Inventor before: Gong Peng Inventor before: Zhao Xuefeng Inventor before: Ba Qin Inventor before: Ou Jinping |
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