CN102645176A - High-temperature resistant FBG (fiber bragg grating) sheet type strain sensor and manufacturing method thereof - Google Patents
High-temperature resistant FBG (fiber bragg grating) sheet type strain sensor and manufacturing method thereof Download PDFInfo
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- CN102645176A CN102645176A CN2012101548828A CN201210154882A CN102645176A CN 102645176 A CN102645176 A CN 102645176A CN 2012101548828 A CN2012101548828 A CN 2012101548828A CN 201210154882 A CN201210154882 A CN 201210154882A CN 102645176 A CN102645176 A CN 102645176A
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Abstract
The invention discloses a high-temperature resistant FBG (fiber bragg grating) sheet type strain sensor and a manufacturing method thereof. The strain sensor consists of an FBG, a polyimide film, an armored cable and an optical fiber connector, wherein the FBG is connected with the polyimide film; the armored cable is connected with the FBG; the optical fiber connector is connected with the armored cable; and when the strain of a structural component is monitored, the surface of the monitored object needs to be milled by abrasive paper, and the polyimide and FBG composite sheet is stuck on the monitored object with adhesives. The method adopts a polyimide curing technology and comprises the following steps of: sealing the FBG and polyimide into a mould, and organically combining through heating, curing and cooling to form a polyimide and FBG composite sheet; leading out the armored cable from the end part of the polyimide and FBG composite sheet; and sticking the polyimide and FBG composite sheet on the surface of the structural component to be monitored by use of high-temperature resistant adhesives. The strain sensor disclosed by the invention resists high temperature, has good durability and high measurement accuracy, and is in quasi-distributed arrangement, free from electromagnetic interference and convenient to construct.
Description
Technical field
The present invention relates to the strain monitoring sensing element, is exactly a kind of high temperature resistant type fiber grating chip strain transducer and preparation method thereof specifically.
Background technology
1978, the phenomenon that photon-induced refractive index changes in the Canadian Hill invention germnium doped fiber made the in-core grating be able to come out.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.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 and absolute measurement can be realized; 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, precision is high; 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
2, therefore fragile especially, can not directly apply to engineering.
Polyimide is meant a base polymer that contains imide ring on the main chain, and is wherein important with the polymkeric substance that contains the phthalimide structure.Polyimide has been widely used in fields such as Aeronautics and Astronautics, microelectronics, nanometer, liquid crystal, diffusion barrier, laser as a kind of special engineered material.Recently, each state is all listing research, exploitation and the utilization of polyimide in 21 century one of engineering plastics the most likely.Polyimide, because of its performance and synthetic aspect outstanding feature, no matter be as structured material or as functional material, its great application prospect is familiar with fully, " expert who deals with problems " is known as.
Under hot conditions, during the strain of monitoring of structures member, traditional sensor has the place of a lot of deficiencies: (1) electromagnetism class linear sensor degree is poor; Interference free performance to electromagnetism is poor; Instrument is comparatively heavy, and stability and poor reliability can't steady in a long-termly also provide monitoring information accurately in time; (2) traditional resistance strain gage is affected by environment bigger, because temperature is floated the influence warm with zero, the result of secular strain test understands serious distortion, has the problem of laying difficulty simultaneously.
Strain to structural elements is monitored; Can make us estimate the safety case of structure more accurately; Infer the security developments trend of structure; Reliable basic data is provided also for simultaneously the improvement construction design method, therefore, develops high temperature resistant formula strain transducer and be of practical significance very much for long-term or the structure of short-term job under hot environment.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, precision is high, resistance to elevated temperatures good, good endurance, easy to use, applicable to the high temperature resistant type fiber grating chip strain transducer of structural elements strain monitoring.
The objective of the invention is to realize like this: it is made up of fiber grating, Kapton, armouring optical cable, fibre-optical splice; Fiber grating connects Kapton; The armouring optical cable connects fiber grating; Fibre-optical splice connects the armouring optical cable, need measured object surface sand paper is levigate when strain is monitored to structural elements, be pasted on measured object to polyimide, fiber grating composite sheet with adhesive.
The preparation method of a kind of high temperature resistant type fiber grating of the present invention chip strain transducer: step is following:
Step 1: adopt polyimide curing technology, fiber grating and polyimide are enclosed mould, organically constitute one, the polyimide that shapes, fiber grating composite sheet through heating, curing, three processes of cooling;
Step 2: the armouring optical cable is drawn from polyimide, fiber grating composite sheet end;
The present invention is a kind of can be at the sensor of monitoring of structures member strain under the hot conditions; Fiber grating is encapsulated with Kapton; It is high temperature resistant, corrosion-resistant that Kapton has; The characteristics of rub resistance, thus process that good endurance, high temperature resistant, the laying that can certainly distribute, precision are high, the strain transducer of convenient construction operation, commensurate structure member.That the present invention has is high temperature resistant, corrosion-resistant, sensing accuracy is high, anti-electromagnetic interference (EMI), absolute measurement, certainly distribute, advantages such as anti-damp waterproof, stability and good endurance.The present invention is that fiber grating is mutually compound with polyimide material, and the advantage of two kinds of materials of performance is processed high temperature resistant; Good endurance; Measuring accuracy is high, quasi-distributed laying, exempts from electromagnetic interference (EMI), is convenient to construct, adapt to the sensor that structural elements is carried out strain monitoring.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the polyimide curing process schematic representation.
Embodiment
For example the present invention is described further below in conjunction with accompanying drawing.
Embodiment 1: combine Fig. 1; High temperature resistant type fiber grating chip strain transducer of the present invention; It is made up of a plurality of fiber gratings (1), a plurality of Kapton (2), armouring optical cable (3) and fibre-optical splice (4), and fiber grating (1) connects Kapton (2), and armouring optical cable (3) connects fiber grating (1); Fibre-optical splice (4) connects armouring optical cable (3), and the quantity of fiber grating (1) and Kapton (2) can be decided according to counting of required monitoring.
Its preparation method, step is following:
Step 1: adopt polyimide curing technology, fiber grating and polyimide are enclosed mould, organically constitute one, the polyimide that shapes, fiber grating composite sheet through heating, curing, three processes of cooling;
Step 2: the armouring optical cable is drawn from polyimide, fiber grating composite sheet end;
Step 3: utilize high temperature resistant gluing agent to stick in structural elements surface to be measured to polyimide, fiber grating composite sheet.
Embodiment 2: combine Fig. 2, the present invention includes following architectural feature: 1, fiber grating is directly encapsulated by polyimide material; 2, fiber grating is drawn through the armouring optical cable in polyimide, fiber grating composite sheet end.In the present invention, fiber grating is encapsulated in the Kapton between two parties, can be good at guaranteeing the bonding between grating and the encapsulating material.The present invention has following characteristics: adopt polyimide curing technology, fiber grating and polyimide are enclosed mould, organically constitute one through heating, curing, three processes of cooling, the polyimide, the fiber grating that shape are compound; Concrete steps are following: step 1: mould: quartz glass (1) is a base plate; Quartz glass (2) is pasted on quartz glass (1); Fiber clamp (3) is fixed on the quartz glass (2), and quartz glass (4) is pasted on quartz glass (1), and quartz glass (5) is pasted on quartz glass (4); Quartz glass (6) bottom surface is pasted on quartz glass (1), and side is pasted on quartz glass (4) and quartz glass (5).
Fiber grating (8) is fixed on the mould.
Step 2: pick the polyimide for preparing with glass bar, drop in the liquid bath (7) of mould.
Step 3: put into Constant Temp. Oven to the sample of making, the intensification solidification process is: 60 ℃, and 5h---80 ℃, 1h---100 ℃; 1h---120 ℃, 1h---140 ℃, 1h---160 ℃, 1h---180 ℃; 1h---200 ℃, 1h---220 ℃, 1h---240 ℃, 1h---260 ℃; 1h---280 ℃, 1h---300 ℃, 2h, whole process programming rate is 5 ℃/min.
Step 4: during cooling, cooling rate is 5 ℃/min.The armouring optical cable is drawn from polyimide, fiber grating composite sheet end; Utilize high temperature resistant gluing agent to stick in structural elements surface to be measured to polyimide, fiber grating composite sheet.Performance index of the present invention are as shown in table 1.
Table 1 performance index of the present invention
| Performance | Index |
| Range | -4000～8000με |
| The strain sensing precision | 1.2pm/με |
| Error | ±2με |
| Heat-resisting quantity | ≤300℃ |
| The apodization grating wavelength coverage | 1510nm～1590nm (customizable) |
| Reflectivity | ≥90％ |
| The laying mode | Directly paste |
| Tail optical fiber | The armouring optical cable |
| The wire jumper head | FC/APC or FC/PC |
| Permanance | Greater than 25 years |
Claims (2)
1. high temperature resistant type fiber grating chip strain transducer; It is made up of fiber grating, Kapton, armouring optical cable, fibre-optical splice; It is characterized in that: fiber grating connects Kapton, and the armouring optical cable connects fiber grating, and fibre-optical splice connects the armouring optical cable.
2. the preparation method of a high temperature resistant type fiber grating chip strain transducer as claimed in claim 1, it is characterized in that: step is following:
Step 1: adopt polyimide curing technology, fiber grating and polyimide are enclosed mould, organically constitute one, the polyimide that shapes, fiber grating composite sheet through heating, curing, three processes of cooling;
Step 2: the armouring optical cable is drawn from polyimide, fiber grating composite sheet end;
Step 3: utilize high temperature resistant gluing agent to stick in structural elements surface to be measured to polyimide, fiber grating composite sheet.
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| CN2012101548828A CN102645176A (en) | 2012-05-18 | 2012-05-18 | High-temperature resistant FBG (fiber bragg grating) sheet type strain sensor and manufacturing method thereof |
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| CN2012101548828A CN102645176A (en) | 2012-05-18 | 2012-05-18 | High-temperature resistant FBG (fiber bragg grating) sheet type strain sensor and manufacturing method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033457A (en) * | 2013-03-06 | 2014-09-10 | 中国飞机强度研究所 | Mounting method of fiber Bragg grating sensor |
| CN106546356A (en) * | 2017-01-12 | 2017-03-29 | 吉林大学 | A kind of resistant to elevated temperatures fiber-optical grating temperature sensor |
| CN106546182A (en) * | 2016-11-03 | 2017-03-29 | 北京信息科技大学 | A kind of high-temperature resistant optical fiber grating strain transducer of incline structure |
| CN107490360A (en) * | 2016-06-13 | 2017-12-19 | 中铁隆工程集团有限公司 | Fiber grating settlement monitor is miniaturized |
| CN108151665A (en) * | 2017-12-26 | 2018-06-12 | 北京信息科技大学 | A kind of superhigh temperature resistant strain transducer based on FBG |
| CN109612407A (en) * | 2018-12-29 | 2019-04-12 | 北京信息科技大学 | A kind of Kapton fiber grating mild curvatures sensor and preparation method thereof |
| CN112776237A (en) * | 2020-12-28 | 2021-05-11 | 哈尔滨工业大学 | Pouring type resin-based distributed optical fiber sensor packaging device |
| CN113759459A (en) * | 2021-09-13 | 2021-12-07 | 北京知觉科技有限公司 | Preparation method of high-temperature-resistant fiber Bragg grating array |
| CN114509193A (en) * | 2022-02-10 | 2022-05-17 | 深圳太辰光通信股份有限公司 | Gate area film forming type fiber Bragg grating sensor and manufacturing method thereof |
| CN114963973A (en) * | 2022-04-13 | 2022-08-30 | 盐城市质量技术监督综合检验检测中心(盐城市产品质量监督检验所) | Bolt crack detection device and method based on fiber bragg grating array sensing film |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2550719Y (en) * | 2002-05-30 | 2003-05-14 | 欧进萍 | Optical fiber and grating sheet type package strainometer |
| US20070116402A1 (en) * | 2005-06-30 | 2007-05-24 | Infoscitex Corporation | Humidity sensor and method for monitoring moisture in concrete |
| CN101118176A (en) * | 2007-07-09 | 2008-02-06 | 李智忠 | Passive optical fiber grating submarine sound signal sensor and making method thereof |
| US20110048136A1 (en) * | 2007-10-31 | 2011-03-03 | William Birch | Pressure sensor assembly and method of using the assembly |
| CN102435551A (en) * | 2011-12-02 | 2012-05-02 | 哈尔滨工业大学 | Building wall humidity fiber grating monitoring system |
-
2012
- 2012-05-18 CN CN2012101548828A patent/CN102645176A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2550719Y (en) * | 2002-05-30 | 2003-05-14 | 欧进萍 | Optical fiber and grating sheet type package strainometer |
| US20070116402A1 (en) * | 2005-06-30 | 2007-05-24 | Infoscitex Corporation | Humidity sensor and method for monitoring moisture in concrete |
| CN101118176A (en) * | 2007-07-09 | 2008-02-06 | 李智忠 | Passive optical fiber grating submarine sound signal sensor and making method thereof |
| US20110048136A1 (en) * | 2007-10-31 | 2011-03-03 | William Birch | Pressure sensor assembly and method of using the assembly |
| CN102435551A (en) * | 2011-12-02 | 2012-05-02 | 哈尔滨工业大学 | Building wall humidity fiber grating monitoring system |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033457B (en) * | 2013-03-06 | 2016-06-22 | 中国飞机强度研究所 | A kind of fiber Bragg grating sensor method of attaching |
| CN104033457A (en) * | 2013-03-06 | 2014-09-10 | 中国飞机强度研究所 | Mounting method of fiber Bragg grating sensor |
| CN107490360A (en) * | 2016-06-13 | 2017-12-19 | 中铁隆工程集团有限公司 | Fiber grating settlement monitor is miniaturized |
| CN106546182B (en) * | 2016-11-03 | 2019-01-18 | 北京信息科技大学 | A kind of high-temperature resistant optical fiber grating strain transducer of incline structure |
| CN106546182A (en) * | 2016-11-03 | 2017-03-29 | 北京信息科技大学 | A kind of high-temperature resistant optical fiber grating strain transducer of incline structure |
| CN106546356A (en) * | 2017-01-12 | 2017-03-29 | 吉林大学 | A kind of resistant to elevated temperatures fiber-optical grating temperature sensor |
| CN108151665A (en) * | 2017-12-26 | 2018-06-12 | 北京信息科技大学 | A kind of superhigh temperature resistant strain transducer based on FBG |
| CN109612407A (en) * | 2018-12-29 | 2019-04-12 | 北京信息科技大学 | A kind of Kapton fiber grating mild curvatures sensor and preparation method thereof |
| CN112776237A (en) * | 2020-12-28 | 2021-05-11 | 哈尔滨工业大学 | Pouring type resin-based distributed optical fiber sensor packaging device |
| CN112776237B (en) * | 2020-12-28 | 2023-04-21 | 哈尔滨工业大学 | Pouring type resin-based distributed optical fiber sensor packaging device |
| CN113759459A (en) * | 2021-09-13 | 2021-12-07 | 北京知觉科技有限公司 | Preparation method of high-temperature-resistant fiber Bragg grating array |
| CN113759459B (en) * | 2021-09-13 | 2024-04-12 | 北京知觉科技有限公司 | Preparation method of high-temperature-resistant fiber Bragg grating array |
| CN114509193A (en) * | 2022-02-10 | 2022-05-17 | 深圳太辰光通信股份有限公司 | Gate area film forming type fiber Bragg grating sensor and manufacturing method thereof |
| CN114963973A (en) * | 2022-04-13 | 2022-08-30 | 盐城市质量技术监督综合检验检测中心(盐城市产品质量监督检验所) | Bolt crack detection device and method based on fiber bragg grating array sensing film |
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Application publication date: 20120822 |