CN102636128A - Strain hoop sensor used for measuring hoop strain of pipeline - Google Patents
Strain hoop sensor used for measuring hoop strain of pipeline Download PDFInfo
- Publication number
- CN102636128A CN102636128A CN2012100927615A CN201210092761A CN102636128A CN 102636128 A CN102636128 A CN 102636128A CN 2012100927615 A CN2012100927615 A CN 2012100927615A CN 201210092761 A CN201210092761 A CN 201210092761A CN 102636128 A CN102636128 A CN 102636128A
- Authority
- CN
- China
- Prior art keywords
- strain
- hoop
- pipeline
- sensor
- capillary tubing
- 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 strain hoop sensor used for measuring the hoop strain of a pipeline and belongs to the technical field of sensing. The strain hoop sensor is characterized by being packaged by a double-layer capillary steel pipe, wherein the strain hoop sensor packaged by a double-layer capillary steel pipe is tightly looped to the pipeline by virtue of a metal support and a clamping piece, and the capillary steel pipe is pasted to the outer wall of the pipeline by virtue of epoxy resin. The arc diameter of the contact surface of the metal support and the pipeline is equal to the external diameter of the pipeline, and the metal support is tightly contacted with the pipeline. The measuring sensitivity of the sensor can be adjusted by changing the sizes of elements of the sensor according to the actual requirements. The strain hoop sensor provided by the invention has the effects and advantages that the strain hoop sensor used for measuring the hoop strain of the pipeline can measure the hoop strain of the section of the pipeline, and has high sensitivity; and moreover, the strain hoop sensor can be used for overcoming the defects of small measuring scope, low precision, high possibility of influence caused by electromagnets, poor long-term stability and the like of a resistance strain gauge.
Description
Technical field
The invention belongs to field of sensing technologies, relate to a kind of strain hoop sensor of the measuring channel hoop strain based on Fiber Bragg Grating technology.
Background technology
The method of measuring channel hoop strain at present typically uses strain ga(u)ge.But this method can only be measured the local train of strainometer position; Measurement range is little; Can not reflect whole pipe circumferential deformation situation; And strain ga(u)ge sensitivity low, be subject to that electromagnetic signal is disturbed, long-time stability are poor, the life-span is short, so need to develop a kind of sensor that can overcome the measuring channel hoop strain of above-mentioned shortcoming.
Fiber grating has been widely used in sensory field of optic fibre since coming out.Fiber-optic grating sensor is a kind of novel sensor of processing with fiber grating, writes the optical grating reflection or the transmission bragg wavelength spectrum of inside of optical fibre through detection, realizes by the stress of geodesic structure the absolute measurement of strain and temperature value.Since fiber-optic grating sensor have anti-electromagnetic interference (EMI), anticorrosive, electrical isolation, high sensitivity and low-cost and and the advantages such as favorable compatibility of ordinary optic fibre, so obtained in recent years using widely.
Summary of the invention
The objective of the invention is based on Fiber Bragg Grating technology, a kind of strain hoop sensor of measuring channel hoop strain is provided, this strain hoop sensor can be combined closely with pipeline; Can measure the hoop strain in whole pipe cross section, highly sensitive, strong interference immunity; It is little to have solved existing strain ga(u)ge measurement range, is subject to outside electromagnetic interference, and measurement sensitivity is not high; Problems such as long-time stability are poor, and the life-span is short.
The strain hoop sensor of this measuring channel hoop strain is made up of metal support 1, holder 9, fiber grating 5, capillary tubing 3, capillary tubing 6 and package parts 8.
The technical scheme that the present invention adopted is: at first can know the wavelength change Δ λ and the strain stress of fiber grating according to the principle of work of fiber grating
fRelational expression be formula (1):
Δλ＝K
f·ε
f(1)
K in (1) formula of being somebody's turn to do
fBe the fiber Bragg grating strain sensor sensitivity coefficient.For fibre core is the optical fiber situation of pure quartz, and centre wavelength is near the fiber grating K the 1550nm
fEqual 1.2pm/ μ ε.
Aspect strain measurement, adopt the packaged type that fiber grating is carried out the two ends clamping, this packaged type can through adjustment two ends fixed pivot apart from length of fiber d between d and the two ends package parts
fBetween ratio relation change the sensitivity coefficient of sensor.In sensor construction, adopt the steel pipe encapsulation, the strain of package parts can be ignored, so the deflection between fixed pivot almost all is carried on the optical fiber.At pipe ring in strain measurement, pipeline perimeter change amount
For strain hoop sensor, the variable quantity of pipeline girth all is carried in the long d that is
fOptical fiber on, therefore have
Substitution (1) formula obtains
Be in the fiber grating of 1550nm left and right sides wave band for centre wavelength, the center wavelength variation of sensor and the relation of extraneous strain are as shown in the formula
ε in the formula
pBe pipeline hoop strain, ε
fBe fibre strain, Δ l is a pipeline girth change amount.Can find out from following formula, through adjustment d
fSize, can change the strain measurement sensitivity of fiber grating strain hoop sensor.
Utilize capillary tubing can produce very big diastrophic characteristic, fiber grating is encapsulated with capillary tubing, just can sensor be made the circular boop shape.Through increasing the length of capillary tubing, promptly reduce d
f, can improve strain transducer and measure sensitivity.With after the capillary tubing encapsulation, lock ring is fixed sensor with metal support and holder on pipeline, uses epoxy resin to be bonded at pipeline outer wall to sensor then, makes the distortion of pipeline consistent with the distortion of sensor with fiber grating.
Wherein metal support is a special facture, and the surface of contact arc dia of it and pipeline equals outer diameter tube, cuts out half slot at the bearing middle part; Capillary tubing is embedded in the half slot through package parts; And fix package parts through holder, the half slot bottom is tangent with pipeline, with this metal support sensor is closely contacted with pipeline; And avoided capillary tubing that bigger bending takes place, damage sensor.
Effect of the present invention and benefit have provided a kind of strain hoop sensor that is used for the measuring channel hoop strain; It can measure the hoop strain in whole pipe cross section; Has higher sensitivity; It is little to have solved the strain ga(u)ge measurement range, and precision is low, is subject to shortcomings such as electromagnetic interference (EMI), long-time stability difference.
Description of drawings
Fig. 1 is the longitudinal profile structural drawing of fiber grating strain hoop sensor.
Fig. 2 (a) is the metal support oblique view of fiber grating strain hoop sensor.
Fig. 2 (b) is the metal support side view of fiber grating strain hoop sensor.
Fig. 3 is the holder synoptic diagram of fiber grating strain hoop sensor.
Among Fig. 1: 1 metal support; 2704 glue; 3 diameter 1.0mm steel pipes; 4 epoxide-resin glues; 5 fiber gratings; 6 straight 0.8mm steel pipes; 7 optical fiber; 8 package parts; 9 holders.
Embodiment
Be described in detail embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
The synoptic diagram of a kind of strain hoop sensor package structure that is used for the measuring channel hoop strain of the present invention is as shown in Figure 1.This strain hoop sensor is made up of metal support 1, holder 9, fiber grating 5, capillary tubing 3, capillary tubing 6 and package parts 8.The sensor lock ring that will tentatively encapsulate through metal support 1 and holder 9 is made strain hoop sensor at pipeline outer wall, and wherein metal support 1 equals outer diameter tube with the surface of contact arc dia of pipeline, can closely contact with pipeline.
Described fiber grating strain hoop sensor production method for packing is following: at first peel off the overlay on optical fiber 7 surfaces at fiber grating 5 two ends, use the fiber coating machine that bare optical fibers and bare optical gratings 5 positions are applied one deck 704 glue, after waiting to solidify fiber grating is placed steel pipe 6; Use its position of accurate fiber adjusting mount adjustment; Make it be in central part, then pour into the epoxide-resin glue 4 that configures by a certain percentage, treat after the adhesive curing that the capillary tubing 6 that the end evenly is coated with full 704 glue 2 places in the capillary tubing 3; 6 stretch out 3 outer parts; Treat adhesive curing, then 6 liang of ends of capillary tubing are inserted in the package parts 8, pour into bonding capillary tubing 6 of epoxide-resin glue and package parts 8; After treating the epoxy resin adhesive curing, promptly accomplish preliminary encapsulation.During use, the sensor hoop at pipeline outer wall, with the fixing package parts 8 of metal support 1 and holder 9, is sticked together sensor and pipeline with epoxide-resin glue then.
Claims (2)
1. strain hoop sensor that is used for the measuring channel hoop strain; Be made up of metal support (1), holder (9), fiber grating (5), capillary tubing (3), capillary tubing (6) and package parts (8), it is characterized in that adopting double-deck capillary tubing encapsulation, internal layer uses capillary tubing (6); The outer capillary tubing (3) that uses; Use bonding optical fiber of epoxide-resin glue and steel pipe (6), be enclosed within steel pipe (6) skin, use 704 gluing connecing with steel pipe (3); Use then metal support (1) and holder (9) with the sensor lock ring of capillary tubing encapsulation on pipeline, use epoxide-resin glue that capillary tubing (3) is bonded at pipeline outer wall.
2. a kind of strain hoop sensor that is used for the measuring channel hoop strain according to claim 1; It is characterized in that: metal support (1) is identical with tube contacts face arc diameter and outer diameter tube; Half slot is arranged at metal support (1) bottom; Half slot axis and pipeline outer wall are tangent, and capillary tubing (3) is embedded in the half slot through package parts (8), and fix through holder (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100927615A CN102636128A (en) | 2012-03-30 | 2012-03-30 | Strain hoop sensor used for measuring hoop strain of pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100927615A CN102636128A (en) | 2012-03-30 | 2012-03-30 | Strain hoop sensor used for measuring hoop strain of pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102636128A true CN102636128A (en) | 2012-08-15 |
Family
ID=46620618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100927615A Pending CN102636128A (en) | 2012-03-30 | 2012-03-30 | Strain hoop sensor used for measuring hoop strain of pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102636128A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148797A (en) * | 2013-03-14 | 2013-06-12 | 山东大学 | Fiber grating vertical strain sensor |
| CN103792149A (en) * | 2014-03-04 | 2014-05-14 | 大连理工大学 | Bituminous pavement material side stability sensor based on fiber bragg gratings |
| CN103867793A (en) * | 2014-03-20 | 2014-06-18 | 大连理工大学 | Controllable-pretension FBG (Fiber Bragg Grating) strain hoop gripper system |
| CN104457604A (en) * | 2014-10-24 | 2015-03-25 | 大连理工大学 | Asphalt pavement site radial strain test sensor based on optical fiber sensing technology |
| CN104534282A (en) * | 2014-11-20 | 2015-04-22 | 大连理工大学 | Method for monitoring leakage and positioning pipeline through straining loop sensor array |
| CN104613318A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Online monitoring method for tunnel internal pipeline |
| CN105318842A (en) * | 2015-11-17 | 2016-02-10 | 大连大学 | Pressure pipeline welding seam breakage monitoring sensor system |
| CN105403141A (en) * | 2015-11-27 | 2016-03-16 | 中国科学院武汉岩土力学研究所 | Circumferential strain gauge for inner wall of circular hole |
| CN105698696A (en) * | 2016-04-07 | 2016-06-22 | 哈尔滨工业大学 | Distributed optical fiber sensibility enhancing device |
| CN109520666A (en) * | 2019-01-03 | 2019-03-26 | 大连理工大学 | A kind of non-destructive monitoring method of pipeline internal pressure |
| CN110095181A (en) * | 2019-05-24 | 2019-08-06 | 辽宁科技大学 | Embedded hydraulic air pipeline multi-parameters test acquisition and analysis device |
| CN114963024A (en) * | 2022-04-11 | 2022-08-30 | 国家石油天然气管网集团有限公司 | Monitoring device and detection system for oil and gas pipeline and installation method of detection system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595081A (en) * | 2004-06-24 | 2005-03-16 | 大连理工大学 | Temperature transducer for optical fiber grating steel tube packaging |
| CN1948897A (en) * | 2006-11-10 | 2007-04-18 | 大连理工大学 | Pipe displace ment sensor of optical fibre grating marmen |
| GB2456830A (en) * | 2008-01-28 | 2009-07-29 | Schlumberger Holdings | Monitoring loads on pipes using collars and connecting elements with strain sensors |
| CN101769442A (en) * | 2010-01-18 | 2010-07-07 | 大连理工大学 | Method for monitoring pipeline corrosion |
| CN201535705U (en) * | 2009-04-23 | 2010-07-28 | 大连理工大学 | Fiber bragg grating pipeline stress hoop |
| CN102230834A (en) * | 2011-06-03 | 2011-11-02 | 大连理工大学 | Fiber grating cable tension transducer with temperature self-compensation function |
-
2012
- 2012-03-30 CN CN2012100927615A patent/CN102636128A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1595081A (en) * | 2004-06-24 | 2005-03-16 | 大连理工大学 | Temperature transducer for optical fiber grating steel tube packaging |
| CN1948897A (en) * | 2006-11-10 | 2007-04-18 | 大连理工大学 | Pipe displace ment sensor of optical fibre grating marmen |
| GB2456830A (en) * | 2008-01-28 | 2009-07-29 | Schlumberger Holdings | Monitoring loads on pipes using collars and connecting elements with strain sensors |
| CN201535705U (en) * | 2009-04-23 | 2010-07-28 | 大连理工大学 | Fiber bragg grating pipeline stress hoop |
| CN101769442A (en) * | 2010-01-18 | 2010-07-07 | 大连理工大学 | Method for monitoring pipeline corrosion |
| CN102230834A (en) * | 2011-06-03 | 2011-11-02 | 大连理工大学 | Fiber grating cable tension transducer with temperature self-compensation function |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103148797B (en) * | 2013-03-14 | 2016-05-11 | 山东大学 | The vertical strain transducer of fiber grating |
| CN103148797A (en) * | 2013-03-14 | 2013-06-12 | 山东大学 | Fiber grating vertical strain sensor |
| CN104613318A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Online monitoring method for tunnel internal pipeline |
| CN103792149A (en) * | 2014-03-04 | 2014-05-14 | 大连理工大学 | Bituminous pavement material side stability sensor based on fiber bragg gratings |
| CN103792149B (en) * | 2014-03-04 | 2015-11-18 | 大连理工大学 | Based on the asphalt pavement material lateral stability sensor of fiber grating |
| CN103867793A (en) * | 2014-03-20 | 2014-06-18 | 大连理工大学 | Controllable-pretension FBG (Fiber Bragg Grating) strain hoop gripper system |
| CN103867793B (en) * | 2014-03-20 | 2015-10-28 | 大连理工大学 | A kind of controlled pretensioned fiber grating strain hoop clamp device system |
| CN104457604A (en) * | 2014-10-24 | 2015-03-25 | 大连理工大学 | Asphalt pavement site radial strain test sensor based on optical fiber sensing technology |
| CN104457604B (en) * | 2014-10-24 | 2017-02-22 | 大连理工大学 | Asphalt pavement site radial strain test sensor based on optical fiber sensing technology |
| CN104534282A (en) * | 2014-11-20 | 2015-04-22 | 大连理工大学 | Method for monitoring leakage and positioning pipeline through straining loop sensor array |
| CN105318842A (en) * | 2015-11-17 | 2016-02-10 | 大连大学 | Pressure pipeline welding seam breakage monitoring sensor system |
| CN105318842B (en) * | 2015-11-17 | 2018-05-25 | 大连大学 | Pressure pipeline weld seam breakage monitoring sensing system |
| CN105403141A (en) * | 2015-11-27 | 2016-03-16 | 中国科学院武汉岩土力学研究所 | Circumferential strain gauge for inner wall of circular hole |
| CN105698696A (en) * | 2016-04-07 | 2016-06-22 | 哈尔滨工业大学 | Distributed optical fiber sensibility enhancing device |
| CN105698696B (en) * | 2016-04-07 | 2018-10-02 | 哈尔滨工业大学 | Distribution type fiber-optic enhanced sensitivity device |
| CN109520666A (en) * | 2019-01-03 | 2019-03-26 | 大连理工大学 | A kind of non-destructive monitoring method of pipeline internal pressure |
| CN109520666B (en) * | 2019-01-03 | 2020-07-14 | 大连理工大学 | Nondestructive monitoring method for pressure inside pipeline |
| CN110095181A (en) * | 2019-05-24 | 2019-08-06 | 辽宁科技大学 | Embedded hydraulic air pipeline multi-parameters test acquisition and analysis device |
| CN114963024A (en) * | 2022-04-11 | 2022-08-30 | 国家石油天然气管网集团有限公司 | Monitoring device and detection system for oil and gas pipeline and installation method of detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102636128A (en) | Strain hoop sensor used for measuring hoop strain of pipeline | |
| CN100533056C (en) | Encapsulation method for optical fibre grating add-and-subtract quick strain sensor | |
| CN205300521U (en) | Surface formula temperature is from compensated fiber strain sensor | |
| CN101539403B (en) | Fiber grating strain and temperature simultaneously measuring sensor | |
| CN101701860B (en) | Optical fiber grating ice-pressure sensor | |
| CN201382778Y (en) | Measuring transducer used for simultaneously measuring strain and temperature of fiber grating | |
| CN107941306B (en) | Improved double-fiber grating packaged liquid level sensor and liquid level measurement method | |
| CN101793542A (en) | High-sensitivity optical fiber grating liquid level/fluid pressure sensor | |
| CN106370121B (en) | The matrix strain correction method of clipping fiber grating | |
| CN102620858A (en) | Double long period fiber grating (LPFG) temperature and humidity sensor | |
| CN102587893A (en) | Optic fiber temperature pressure sensor and probe thereof | |
| CN202709997U (en) | Strain hoop sensor used for measuring hoop strain of pipe | |
| CN104697682A (en) | Fiber Bragg grating strain-measuring method and fiber Bragg grating strain sensor | |
| WO2014186908A1 (en) | Multi-parameter optical sensor and method for optical sensor manufacturing | |
| CN103822591A (en) | Small substrate type fiber Bragg grating strain transducer | |
| CN101532891B (en) | Fiber grating pressure sensor free from temperature influence | |
| CN112833809A (en) | Fiber grating high-temperature strain gauge and calibration method thereof | |
| CA2925011C (en) | Strain isolated fiber bragg grating sensors | |
| CN105043282A (en) | Fiber grating shear strain sensor | |
| KR101529610B1 (en) | Apparatus and Sensing System for Fiber Bragg Grating Probes Having Controlled Sensitivity and Method for Sensing and Manufacturing thereof | |
| CN103512593B (en) | A kind of Rules for Embedded FBG Sensors and method for making | |
| CN205958155U (en) | Insensitive pressure sensor of temperature | |
| CN201449306U (en) | Fiber bragg grating pressure sensor | |
| CN103867793A (en) | Controllable-pretension FBG (Fiber Bragg Grating) strain hoop gripper system | |
| CN203758464U (en) | Miniaturized substrate type optical fiber Bragg optical grating strain sensor |
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 |
Application publication date: 20120815 |