CN1208653C - Fibre reinforced plastics-optical fibre grating lombined sensor - Google Patents
Fibre reinforced plastics-optical fibre grating lombined sensor Download PDFInfo
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- CN1208653C CN1208653C CN 02132998 CN02132998A CN1208653C CN 1208653 C CN1208653 C CN 1208653C CN 02132998 CN02132998 CN 02132998 CN 02132998 A CN02132998 A CN 02132998A CN 1208653 C CN1208653 C CN 1208653C
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- grating
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- reinforced plastics
- lombined
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 28
- 239000000835 fiber Substances 0.000 title claims description 57
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims abstract description 34
- 239000011151 fibre-reinforced plastic Substances 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 210000003205 muscle Anatomy 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000009776 industrial production Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000008376 long-term health Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The present invention provides a composite sensing rib of fiber reinforced plastic and an optical fiber grating, which comprises a fiber reinforced plastic rib, wherein an optical fiber grating is arranged in the fiber reinforced plastic rib along the length direction. The present invention has the advantages of light weight, high strength, fatigue resistance, corrosion resistance, high sensing precision, electromagnetic interference resistance, quasi-distribution type sensing, absolute measurement, damp resistance, water resistance, high stability, high durability, etc. The present invention can be cut into random length according to actual requirements of engineering, so that the present invention has the advantage of convenient use and is particularly suitable for industrial production.
Description
(1) technical field
What the present invention relates to is a kind of structure intelligent monitoring sensing element.Specifically a kind of have civil engineering structure stressed with the monitoring bifunctional fibre reinforced plastics-optical fibre grating sensing muscle.
(2) background technology
1978, the phenomenon that photon-induced refractive index changes in the Canadian Hill invention germnium doped fiber was come out the in-core grating.1989, the Meltz invention germnium doped fiber grating ultraviolet sidelights on of the U.S. were gone into technology, and people utilize this technology can make the fiber grating of various constants easily, make cost reduce greatly, for its widespread use is laid a good foundation.Because fiber grating has wavelength selectivity, with the fibre system compatibility, insert advantages such as loss is low, simple in structure, volume is little, with low cost, fiber grating all has a wide range of applications in communication and sensory field.The major advantage that fiber grating is used for sensing is embodied in: can avoid the interference of electromagnetic field, electrical insulating property is good; Not influenced by wet environment; Good endurance has opposing and comprises the various rugged surroundings of high temperature (less than 600 ℃) and the ability of chemical erosion, the ability that has the vibration of bearing and impact; Light weight, volume be little, little to structure influence, be easy to arrange; Both point measurement can be realized, also distributed measurement can be realized; Absolute measurement; Save circuit, only just can the transfer structure status signal with single line; But signal, data multipath transmission are convenient to be connected with computing machine, and signal attenuation is little on the unit length; Highly sensitive, the precision height; Bandwidth, signal to noise ratio (S/N ratio) is high.But because bare optical fibers and bare optical gratings is very thin especially, external diameter is about about 125 microns, and its principal ingredient is SiO
2Therefore fragile especially, especially its shear resistance is very poor, directly it has been run into an installation technics difficult problem as sensing element in engineering reality, can not adapt to the xoncrete structure extensive style mode of production and abominable Service Environment at all, seriously restrict the application of fiber grating in civil engineering work.
Fibre reinforced plastics are compound substances of forming with continuous fiber.This continuous fiber at first is immersed in the polymkeric substance that is used for binder fibre, is processed into needed shape then.According to the difference of kinds of fibers, fibre reinforced plastics can be divided into carbon fiber reinforced plastics, glass fiber reinforced plastics and aromatic polyamide fiber reinforced plastics and mix reinforced plastic etc.Fibre reinforced plastics have tensile strength height, in light weight, corrosion-resistant, nonmagnetic, endurance, easy good characteristic such as processing.Wherein, the fibre reinforced plastics bar can be made the shape of regular reinforcement, is considered to a kind of possible equivalent material of reinforcing bar.The tensile strength of carbon fibre precursor machine direction can reach tens times of regular reinforcement, and the elastic modulus of high-elastic modules carbon fibre can reach 2～3 times of steel, and have higher antimagnetic and shielding property, once in war production, be used for latent row aircraft, antimagnetic and radiation proof engineering.But, the shortcoming that also there is the ductility difference in fibre reinforced plastics as a kind of novel building materials that development potentiality is arranged and technology, be not to replace traditional building materials-steel and concrete, but as an important supplement of traditional architecture, be suitable for the demanding important engineering structures in aspect such as Service Environment, permanance, antifatigue, as underground structure, oceanographic engineering, hydraulic engineering etc.Set up fibre reinforced plastics research association in developed countries such as the U.S., Japan, Canada at present, tentatively formulated the standard of structural design, and be successfully used to actual engineering.
(3) summary of the invention
The object of the present invention is to provide a kind of simple in structure, easy to use, both can substitute or part substitutes reinforcing bar as primary structure member, also possess the fibre reinforced plastics-optical fibre grating lombined sensor of intelligent sensing characteristic.The object of the present invention is achieved like this: it comprises fiber reinforced plastic rod, in fiber reinforced plastic rod, be laid with fiber grating along its length, fiber grating is sent into drawing mould with the fibrous material that steeped epoxy resin, process heating, curing, three heat treatment processes of cooling organically constitute one, pitted skin or the winding resin that make for sandblast on the fiber reinforced plastic rod surface.The present invention can also comprise some architectural features like this: 1, the tail end at one section sensing muscle exposes one section optical fiber that is used to connect the compensated optical fiber grating.2, fiber grating is positioned at the centre of fiber reinforced plastic rod.3, the grating on the fiber grating is to have certain-length grating string at interval.The fiber grating of product of the present invention is arranged in the fiber reinforced plastic rod, is to shape in the process by fibre reinforced plastics fiber grating is entered drawing mould together with fibrous bundle, organically constitutes one through Technology for Heating Processing.Because fiber grating and fibre reinforced plastics are fixed good, guaranteed the cooperative transformation of fiber grating and fibre reinforced plastics, thereby the strain of fiber grating induction is exactly the distortion of fibre reinforced plastics.The needs of Temperature Influence and accurate distribution measuring are provided with one section optical fiber that exposes at tail end, so that welding temperature compensated optical fiber grating or cascaded fiber grating sensing element when considering the monitoring of civil engineering structure long-term health.The compensated optical fiber grating places another capillary metal tube, guarantees the influence that it is not subjected to external force.This lombined sensor has the advantage of fibre reinforced plastics and fiber grating concurrently, as high-strength light, antifatigue, corrosion-resistant, advantages such as sensing accuracy is high (can reach 1～2 μ ε), anti-electromagnetic interference (EMI), quasi-distributed sensing, absolute measurement, moisture resistance waterproof, stability and good endurance.Simultaneously, this lombined sensor has remedied fibre reinforced plastics and fiber grating some shortcomings separately, as fiber grating overcome fiber reinforced plastic rod from the perception nonlinear problem; And fibre reinforced plastics are a kind of good packaging protections of fiber grating, have overcome bare optical fibers and bare optical gratings and have been difficult to adapt to the requirement that the reinforced concrete structure extensive style is constructed, and have improved the permanance of fiber grating greatly.Like this, fibre reinforced plastics-optical fibre grating sensing muscle just forms the outstanding sensing characteristics of the good mechanical characteristic of fibre reinforced plastics, antirust durable and anti-emi characteristics and fiber grating and organically combines, and has greatly satisfied the needs of civil engineering structure to mechanical property and structure intelligent health monitoring.In addition, fibre reinforced plastics-optical fibre grating sensing muscle can cut into random length according to actual demands of engineering, and is very easy to use, is particularly suitable for industrialization production.
(4) description of drawings
Fig. 1 and 2 is the structural representation of embodiment of the present invention.
(5) specific embodiments
For example the present invention is done more detailed description below in conjunction with accompanying drawing:
In conjunction with Fig. 1, the structure of fibre reinforced plastics-optical fibre grating lombined sensor is formed and is comprised fiber reinforced plastic rod 1, is laid with fiber grating 2 in fiber reinforced plastic rod along its length.Product of the present invention can adopt such method to make: with fiber grating and the fibrous material that steeped epoxy resin, as carbon fiber, glass fibre, aramid fiber etc., send into drawing mould together, organically constitute one through heating, curing, three heat treatment processes of cooling, when coming out of the stove, marked the particular location of fiber grating simultaneously.Consider the packaging protection of fiber grating, fiber grating is sent into as fasciculus intermedius, and the back fiber grating that is shaped is positioned at the centre of fiber reinforced plastic rod.For better with concrete conglutination, blasting treatment is carried out on the fiber reinforced plastic rod surface, makes the surface of fiber reinforced plastic rod form pitted skin, or twine resin outside fiber reinforced plastic rod.In order to give full play to the quasi-distributed sensing ability of fiber grating, the fiber grating of sending into has been fused in advance has certain-length grating string at interval.Engineering is used or is tested when needing, and the fibre reinforced plastics-optical fibre grating sensing muscle that shapes is cut into required length arbitrarily, and utilize the anisotropic characteristics of fiber in the end optical fiber ablation to be come out, and is welded on the optical patchcord to get final product.
In conjunction with Fig. 2, consider the temperature compensation or the distributed sensing problem of structure long-term health monitoring, the tail end of each section sensing muscle exposes one section optical fiber 3, can connect compensated optical fiber grating or other fiber-optic grating sensors.
Claims (5)
1, a kind of fibre reinforced plastics-optical fibre grating lombined sensor, it is characterized in that: it comprises fiber reinforced plastic rod, in fiber reinforced plastic rod, be laid with fiber grating along its length, fiber grating is sent into drawing mould with the fibrous material that steeped epoxy resin, process heating, curing, three heat treatment processes of cooling organically constitute one, pitted skin or the winding resin that make for sandblast on the fiber reinforced plastic rod surface.
2, fibre reinforced plastics-optical fibre grating lombined sensor according to claim 1 is characterized in that: the tail end at one section sensing muscle exposes one section optical fiber that is used to connect the compensated optical fiber grating.
3, fibre reinforced plastics-optical fibre grating lombined sensor according to claim 1 and 2 is characterized in that: fiber grating is positioned at the centre of fiber reinforced plastic rod.
4, fibre reinforced plastics-optical fibre grating lombined sensor according to claim 1 and 2 is characterized in that: fiber grating is the optical fiber string with certain-length interval of welding.
5, fibre reinforced plastics-optical fibre grating lombined sensor according to claim 3 is characterized in that: the grating on the fiber grating is to have certain-length grating string at interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02132998 CN1208653C (en) | 2002-09-19 | 2002-09-19 | Fibre reinforced plastics-optical fibre grating lombined sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02132998 CN1208653C (en) | 2002-09-19 | 2002-09-19 | Fibre reinforced plastics-optical fibre grating lombined sensor |
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| Publication Number | Publication Date |
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| CN1484056A CN1484056A (en) | 2004-03-24 |
| CN1208653C true CN1208653C (en) | 2005-06-29 |
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| CN 02132998 Expired - Fee Related CN1208653C (en) | 2002-09-19 | 2002-09-19 | Fibre reinforced plastics-optical fibre grating lombined sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210983B (en) * | 2006-12-29 | 2010-12-22 | 柳州欧维姆机械股份有限公司 | Optical fiber grating intelligent steel strand and its manufacture method |
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| CN100335714C (en) * | 2004-11-17 | 2007-09-05 | 欧进萍 | Intelligent rope with grating and fibre-optical fibre and enhanced resin rib |
| CN101093187B (en) * | 2007-07-04 | 2010-10-13 | 哈尔滨工业大学 | Optical fiber, optical grating FRP intelligent anchor head, and fabricating technique |
| CN102323024A (en) * | 2011-05-31 | 2012-01-18 | 上海交通大学 | Vortex-induced vibration test, measurement and analysis system for deep-sea flexible riser model |
| CN102323023B (en) * | 2011-05-31 | 2013-11-06 | 上海交通大学 | Flexible riser model for actual Reynolds number vortex-induced vibration test |
| CN102819079A (en) * | 2012-08-17 | 2012-12-12 | 苏州南智传感科技有限公司 | Tight tube optical fiber grating serial sensing optical cable |
| CN104215191A (en) * | 2013-05-30 | 2014-12-17 | 成都阜特科技股份有限公司 | Optical fiber grating sensor packaging method |
| CN103628697B (en) * | 2013-11-22 | 2016-06-29 | 广西科技大学 | The continuously shaped intelligent plate of fiber grating fibre reinforced composites pultrusion |
| CN108317965A (en) * | 2018-01-31 | 2018-07-24 | 北京航天控制仪器研究所 | A kind of measurement deformation structure and method with fiber grating |
| CN109269533A (en) * | 2018-09-05 | 2019-01-25 | 北京百世通管道科技有限公司 | A kind of Intelligent optical fiber sensor skin and its preparation and application |
| CN109901272B (en) * | 2019-04-15 | 2024-07-02 | 武汉地震工程研究院有限公司 | Multi-core optical fiber intelligent composite rib, preparation method and safety monitoring method |
| CN110173078A (en) * | 2019-06-18 | 2019-08-27 | 中复碳芯电缆科技有限公司 | A kind of building field intelligent composite reinforcing rib |
| CN113251297A (en) * | 2020-02-11 | 2021-08-13 | 叶晓明 | Information metal section bar |
| 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 |
| CN114754683A (en) * | 2022-05-07 | 2022-07-15 | 广西欣港交通投资有限公司 | Intelligent measuring system and testing method for deformation of cast-in-place pile and length of reinforcement cage |
-
2002
- 2002-09-19 CN CN 02132998 patent/CN1208653C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210983B (en) * | 2006-12-29 | 2010-12-22 | 柳州欧维姆机械股份有限公司 | Optical fiber grating intelligent steel strand and its manufacture method |
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| CN1484056A (en) | 2004-03-24 |
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Owner name: NINGBO SEQUOIA WORKS STRUCTURE MONITOR AND CONTROL Free format text: FORMER NAME OR ADDRESS: OU JINPING; ZHOU ZHI |
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Address after: 315177 Zhejiang city of Ningbo Province town Yinzhou District Shanshan Science & Technology Park Ningbo Shangong structure monitoring and Control Engineering Center Co. Ltd. Patentee after: NingBo ShanGong Center of Structural Monitoring & Control Engineering Co.,Ltd. Address before: Box 2546, two campus, Harbin Institute of Technology, 202 Haihe Road, Nangang, Heilongjiang, Harbin Co-patentee before: Zhou Zhi Patentee before: Ou Jinping |
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