CN1948897A - Pipe displace ment sensor of optical fibre grating marmen - Google Patents
Pipe displace ment sensor of optical fibre grating marmen Download PDFInfo
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- CN1948897A CN1948897A CNA2006101342660A CN200610134266A CN1948897A CN 1948897 A CN1948897 A CN 1948897A CN A2006101342660 A CNA2006101342660 A CN A2006101342660A CN 200610134266 A CN200610134266 A CN 200610134266A CN 1948897 A CN1948897 A CN 1948897A
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- pipe
- optical fiber
- marmem
- steel tube
- marmen
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Abstract
The invention relates to contacting type optical fiber raster shape memory alloy pipe displacement transducer. Its features are that it is made up of bearing, protecting steel tube, spring, and optical fiber raster strain gage with double layer steel tube composite structure; it uses epoxy resin to seal the optical fiber taster in to the 0.5mm steel tube which assembles with two 1.2mm steel tubes to form optical fiber raster strain gage of which one end is connected with 1.2mm hollow steel tube; another end is connected with the spring and set in the bearing. The advantages of the invention are that little volume and high measuring precision, setting many sensors at one optical fiber to do multipoint distributivity measuring, connecting with various sensors based on optical fiber raster technique in series.
Description
Technical field
The invention belongs to field of sensing technologies, relate to a kind of displacement transducer based on Fiber Bragg Grating technology and marmem technology.
Background technology
Displacement transducer commonly used mainly is divided into two kinds of contactless and contacts.Laser displacement sensor is a non-contact displacement transducer relatively more commonly used, and it utilizes the displacement of triangle principle of reflection non-cpntact measurement.Its advantage is the measuring accuracy height, does not disturb the testee motion process.But it requires than higher measurement environment, and can not there be vibration at the laser instrument position, otherwise can bring very big measuring error.
Tangent displacement sensor commonly used is the displacement transducer of strain-type.It and secondary instrument such as strainmeter, the supporting use of digital voltmeter, the static displacement that can carry out in the engineering test is measured.Because its core sensing element adopts electric class strainometer, has inevitably brought the shortcoming that is subject to electromagnetic interference, long-time stability difference, can't satisfy the need of work in abominable working environments such as strong electromagnetic radiation.Simultaneously, often volume ratio is bigger for tangent displacement sensor commonly used, and range is less, can't satisfy the displacement measurement in the accurate environment.
Shape memory alloy material is a kind of intellectual material that recently rises, and has SME, superelastic effect, characteristics such as elastic modulus is low, elastic range is big, corrosion resistant advantage, in the sensor design field wide prospect is arranged.
Fiber grating is a kind of strain sensor of function admirable.It has highly sensitive, and volume is little, and is corrosion-resistant, anti-electromagnetic-radiation, and light path is flexible, is convenient to realize advantages such as telemeasurement; Because tool adopts the Wavelength-encoding technology, eliminated the influence of light source power fluctuation and system loss, be applicable to long term monitoring; And the sensor-based system of a plurality of fiber gratings compositions, adopt an optical cable, can realize quasi-distributed measurement.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, lay the contact type optical fiber raster shape memorial alloy pipe displacement transducer convenient, that precision is high, volume is little, long-time stability are good, overcome the shortcoming that traditional electrical class displacement transducer is subject to electromagnetic interference (EMI), long-time stability difference, can satisfy the displacement measurement in the rugged surroundings such as strong electromagnetic radiation; Utilize the big characteristics of elastic range of marmem, increased substantially the range of displacement transducer.
Technical scheme of the present invention is the displacement transducer that is made of marmem bend pipe, fiber grating, trough of belt copper sheet and copper base.At first make the marmem bend pipe and bare optical fibers and bare optical gratings is done pre-service.Be fixed on the steel plate after the marmem pipe bending will 50mm long, that external diameter is 0.4mm, and send into high temperature furnace and carry out the high temperature shape and handle and quench, and make it have SME case of bending.Use the optical-fibre coating machine that the bare optical fibers and bare optical gratings zone is applied, coating thickness is 100 μ m, and reserves naked fine zone, about 7mm left and right sides at two ends; The marmem pipe two ends are placed trough of belt copper sheet groove; Utilize scolding tin that trough of belt copper sheet and marmem pipe are welded on the copper base of two thickness for 0.2mm then, fiber grating after applying is placed in the marmem bend pipe, adjusting its position makes it be in central part, adopt the high-pressure injection plastic method that epoxide-resin glue is injected in the bend pipe, treat that displacement transducer is promptly made behind the glue hot setting to finish.The relative displacement variation of bend pipe two ends copper base can make marmem pipe generation deformation, thereby has changed the reflection wavelength of fiber grating, and the relative displacement that can draw marmem bend pipe two ends by measuring optical fiber optical grating reflection wavelength change changes.
Effect of the present invention and benefit are, this displacement transducer has overcome traditional electrical sensor and has been subject to shortcomings such as electromagnetic interference (EMI), long-time stability difference, volume is little, measuring accuracy is high, and can arrange that on an optical fiber a plurality of sensors carry out quasi-distributed measurement to multiple spot, can also and based on the various sensors series connection of Fiber Bragg Grating technology.This novel fiber grating displacement sensor structure is simple, cheap, also has advantages such as essence is explosion-proof, anti-electromagnetic interference (EMI) simultaneously, can be widely used in the accurate displacement measurement of abominable working environment such as medical treatment, civil engineering work and nuclear industry.
Description of drawings
Fig. 1 is the pipe displace ment sensor of optical fibre grating marmen side schematic view.
Among the figure: 1 copper sheet pedestal, 2 marmem pipes, 3 trough of belt copper sheets.
Fig. 2 is the pipe displace ment sensor of optical fibre grating marmen schematic top plan view.
Among the figure: 1 copper sheet pedestal, 2 marmem pipes, 3 trough of belt copper sheets, 4 optical fiber.
Fig. 3 is the marmem pipe sectional view after the encapsulation.
Among the figure: 2 marmem pipes, 5 epoxy resin, 6 fiber gratings.
Fig. 4 is the sectional view of trough of belt copper sheet.
Among the figure: 3 trough of belt copper sheets.
Embodiment
Be described in detail most preferred embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
The fiber grating displacement sensor side direction diagrammatic cross-section that the present invention proposes as shown in Figure 1, this sensor schematic top plan view as shown in Figure 2, marmem pipe sectional view after the wherein related encapsulation as shown in Figure 3, related trough of belt copper sheet sectional view is as shown in Figure 4.
The specific practice of marmem pipe and copper sheet pedestal welding is, at first utilizes marmem pipe 2 to squeeze out a semi-circular groove on the scale copper of thickness 0.2mm, makes trough of belt copper sheet 3; Then marmem pipe 2 is placed in the groove and simple and easy being fixed on the copper sheet pedestal 1; Use electric soldering iron heating trough of belt copper sheet 3 one ends, simultaneously scolding tin placed the other end, utilize air pressure that the scolding tin of liquefaction is pressed in the groove, treat low-temperature setting after welding job promptly finish.
The specific practice of fiber grating encapsulation is, at first use the fiber coating machine that fiber grating 6 positions are applied, be placed on then in the marmem pipe 2, use accurate fiber adjusting mount to adjust fiber grating 6 positions, make fiber grating 6 be in central part, then adopt the high-pressure injection plastic mode in marmem pipe 2, to pour into epoxide-resin glue 5, treat promptly to finish encapsulation behind the hot setting.
Claims (1)
1. a pipe displace ment sensor of optical fibre grating marmen is characterized in that marmem pipe is carried out processing of high temperature shape and quenching, makes it have case of bending; Coating processing is carried out at position, grid region to fiber grating; Use scolding tin that the marmem pipe two ends are welded on the copper base of two thickness as 0.2mm, and clamp marmem pipe with the copper base of preformed groove; Fiber grating after applying is placed in the marmem bend pipe, adopts the high-pressure injection plastic method that epoxide-resin glue is injected in the bend pipe, and under hot environment curing epoxy resin adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101342660A CN1948897A (en) | 2006-11-10 | 2006-11-10 | Pipe displace ment sensor of optical fibre grating marmen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101342660A CN1948897A (en) | 2006-11-10 | 2006-11-10 | Pipe displace ment sensor of optical fibre grating marmen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1948897A true CN1948897A (en) | 2007-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101342660A Pending CN1948897A (en) | 2006-11-10 | 2006-11-10 | Pipe displace ment sensor of optical fibre grating marmen |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636128A (en) * | 2012-03-30 | 2012-08-15 | 大连理工大学 | Strain hoop sensor used for measuring hoop strain of pipeline |
| CN105606031A (en) * | 2016-01-17 | 2016-05-25 | 北京工业大学 | Micro displacement testing system |
| CN106918295A (en) * | 2017-03-20 | 2017-07-04 | 海南瑞泽新材料研究院有限公司 | A kind of fiber-optic grating sensor and its measuring method for measuring arc component deformation |
| CN109990723A (en) * | 2018-11-30 | 2019-07-09 | 东莞理工学院 | A kind of reusable flush type grating measuring device |
| CN114265143A (en) * | 2022-01-10 | 2022-04-01 | 安徽理工大学 | Packaging structure of fiber grating |
| CN115655091A (en) * | 2022-10-19 | 2023-01-31 | 秦皇岛市政建设集团有限公司 | Assembled beam column node deformation early warning monitoring devices |
-
2006
- 2006-11-10 CN CNA2006101342660A patent/CN1948897A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636128A (en) * | 2012-03-30 | 2012-08-15 | 大连理工大学 | Strain hoop sensor used for measuring hoop strain of pipeline |
| CN105606031A (en) * | 2016-01-17 | 2016-05-25 | 北京工业大学 | Micro displacement testing system |
| CN105606031B (en) * | 2016-01-17 | 2018-04-03 | 北京工业大学 | micro-displacement test system |
| CN106918295A (en) * | 2017-03-20 | 2017-07-04 | 海南瑞泽新材料研究院有限公司 | A kind of fiber-optic grating sensor and its measuring method for measuring arc component deformation |
| CN109990723A (en) * | 2018-11-30 | 2019-07-09 | 东莞理工学院 | A kind of reusable flush type grating measuring device |
| CN109990723B (en) * | 2018-11-30 | 2021-01-12 | 东莞理工学院 | Reusable embedded type grating measuring device |
| CN114265143A (en) * | 2022-01-10 | 2022-04-01 | 安徽理工大学 | Packaging structure of fiber grating |
| CN114265143B (en) * | 2022-01-10 | 2024-01-26 | 安徽理工大学 | Packaging structure of fiber bragg grating |
| CN115655091A (en) * | 2022-10-19 | 2023-01-31 | 秦皇岛市政建设集团有限公司 | Assembled beam column node deformation early warning monitoring devices |
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