CN1632488A - Anchor cable stress sensor for optical fiber grating dynamometer - Google Patents
Anchor cable stress sensor for optical fiber grating dynamometer Download PDFInfo
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- CN1632488A CN1632488A CN 200410061482 CN200410061482A CN1632488A CN 1632488 A CN1632488 A CN 1632488A CN 200410061482 CN200410061482 CN 200410061482 CN 200410061482 A CN200410061482 A CN 200410061482A CN 1632488 A CN1632488 A CN 1632488A
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Abstract
This invention is a fiber grating ergometer anchor strain sensor, which comprises ring elastic body, several fiber and grating sensor used in strain measurement and temperature measurement, wherein, the fiber and grating sensor adopts glue-free seal process; the fiber and grating sensor and ring elastic adopts laser points welding; the fiber and grating sensor used in strain measurement evenly stuck to the inner and outer sides of the ring elastic body; the fiber and grating sensor used to measure temperature has a welding direction vertical to the strain of the ring elastic body.
Description
Technical field
The present invention relates to the stress measurement of science of bridge building field anchor cable, particularly based on the dynamometer anchor cable stress measurement of fiber grating.
Background technology
Stress loop is applied in the anchor cable stress measurement in civil engineering work and science of bridge building field widely, and prior art generally makes electricity consumption class strain gauge.Electricity class strain gauge is subjected to humidity, Temperature Influence to reduce insulating property easily, and lightning-arrest property is poor, is subjected to the influence of electromagnetic field to be easy to generate noise etc., and is environment resistant poor.And electric class strain gauge is not suitable for distributed multiplexing structure, and carry out multimetering on average will increase to the cost of each measurement point.In addition, the signal to noise ratio (S/N ratio) of system is not high, the detecting signal of the faint stress of intractable.
Open among the 2004-125587 the disclosed spy in the Jap.P. Room and to mention, the building that adopts fiber diffraction gratings is with central pass force cell.Fibre Optical Sensor is introduced the shortcoming of having avoided electrical sensor in the stress loop, but the mode that the combination of the cylindrical portion of FBG sensor wherein and hollow form is to use bonding agent to paste, and bonding agent can absorb stress, produces redundant phenomenon.
Summary of the invention
The present invention aims to provide a kind of fiber grating dynamometer anchor cable strain gauge, the monitoring when being applied to the measurement of bridge anchor cable stress and anchor cable and installing.Can distinguish every wirerope of stay rope when anchor cable is installed, if do not have the monitoring of stress tension uniform can't be applied on the every wirerope when operation, stressed so bigger wirerope can be than being easier to fracture.If on the pressure rings stressed evenly and size appropriateness then the state health of anchor cable is described.Facts have proved that in addition temperature also is the key factor that influences the anchor cable health status, the drag-line of bridge can shrink when temperature reduces, pulling force strengthens the possibility that has increased the wirerope fracture, also is the problem to be solved in the present invention so effectively carry out the measurement and the compensation of temperature.
A kind of fiber grating dynamometer anchor cable strain gauge, mainly comprise: annular elastomeric, six optical fiber optical grating stress sensors, two fiber-optical grating temperature sensors, wherein optical fiber optical grating stress sensor and fiber-optical grating temperature sensor adopt no gel encapsulation technology preparation; Optical fiber optical grating stress sensor and fiber-optical grating temperature sensor and annular elastomeric adopt the mode of laser spot welding to adhere to, the stress direction that the direction of fiber-optical grating temperature sensor welding is born perpendicular to annular elastomeric.
Foregoing a kind of fiber grating dynamometer anchor cable strain gauge, wherein the no gel encapsulating structure of optical fiber optical grating stress sensor and fiber-optical grating temperature sensor comprises: fiber grating, sheet metal, there is the coat of metal on the fiber grating surface, and has name a person for a particular job fiber grating and sheet metal of metal welding to weld together.
Foregoing a kind of fiber grating dynamometer anchor cable strain gauge, wherein six optical fiber optical grating stress sensors are evenly distributed in the outside surface and the inside surface of annular elastomeric, by the welding of laser electric welding machine, direction of welding is parallel to the stress direction that annular elastomeric is born.
Foregoing a kind of fiber grating dynamometer anchor cable strain gauge, wherein two fiber-optical grating temperature sensors lay respectively at the outside surface and the inside surface of annular elastomeric, and this anchor cable stress measurement system is carried out temperature compensation.
The method that the present invention adopts no gel encapsulation technology to prepare fiber-optic grating sensor and adhere to laser spot welding and annular elastomeric has been avoided the problem of bonding agent in conjunction with redundant phenomenon that produces and the decomposition of organism fatiguability.The sensing capabilities and the serviceable life of this anchor cable stress measurement system have been improved.The surfaces externally and internally of annular elastomeric all is distributed with optical fiber optical grating stress sensor, and whether can react the suffered stress of anchor cable from the stress value of diverse location sensor even.In addition, the direction of welding of fiber-optical grating temperature sensor is vertical with the stress direction that annular elastomeric is born, and avoids the stress influence variation of temperature of reaction accurately, also can make temperature compensation to optical fiber optical grating stress sensor simultaneously.
Description of drawings
Fig. 1. fiber grating dynamometer anchor cable strain gauge structural drawing
Fig. 2. fiber grating does not have the gel encapsulation technology and prepares the sensing head structural drawing
Fig. 3. the anchor dynamometer scheme of installation
Fig. 4. anchor cable stress measurement system structural drawing
Embodiment
Fiber grating dynamometer anchor cable strain gauge structure is as Fig. 1. shown in, comprise that 1-annular elastomeric, 2-optical fiber optical grating stress sensor, 3-fiber-optical grating temperature sensor, 8-optical cable draw several sections such as seat, 9-optical cable.Wherein optical fiber optical grating stress sensor and fiber-optical grating temperature sensor adopt no gel encapsulation technology preparation; Optical fiber optical grating stress sensor and fiber-optical grating temperature sensor and annular elastomeric adopt the mode of laser spot welding 14 to adhere to, the stress direction that the direction of fiber-optical grating temperature sensor welding is born perpendicular to annular elastomeric.Foregoing fiber grating dynamometer anchor cable strain gauge structure, wherein six optical fiber optical grating stress sensors 2 are evenly distributed in the outside surface and the inside surface of annular elastomeric, by the welding of laser electric welding machine, direction of welding is parallel to the stress direction that annular elastomeric is born.Foregoing fiber grating dynamometer anchor cable strain gauge structure, wherein two fiber-optical grating temperature sensors 3 lay respectively at the outside surface and the inside surface of annular elastomeric, and this anchor cable stress measurement system is carried out temperature survey and temperature compensation.
Foregoing fiber grating dynamometer anchor cable strain gauge, wherein the no gel encapsulating structure of optical fiber optical grating stress sensor and fiber-optical grating temperature sensor as shown in Figure 2, comprise: fiber grating 10, sheet metal 11, there is the coat of metal 13 on the fiber grating surface, and has metal solder joint 14 that fiber grating and sheet metal are welded together.
As Fig. 4. shown in be that the present invention is applied in the anchor cable stress loop measuring system on the bridge, erection stress ring on each anchor cable, the optical cable of drawing series connection is laggard goes into optical modem, and last measured value input anacom carries out data analysis, to the real-time monitoring of the health status of bridge.
Claims (4)
1, a kind of fiber grating dynamometer anchor cable strain gauge, mainly comprise: annular elastomeric, six optical fiber optical grating stress sensors, two fiber-optical grating temperature sensors is characterized in that optical fiber optical grating stress sensor and fiber-optical grating temperature sensor adopt no gel encapsulation technology preparation; Optical fiber optical grating stress sensor and fiber-optical grating temperature sensor and annular elastomeric adopt the mode of laser spot welding to adhere to, the stress direction that the direction of fiber-optical grating temperature sensor welding is born perpendicular to annular elastomeric.
2, a kind of fiber grating dynamometer anchor cable strain gauge as claimed in claim 1, the no gel encapsulating structure that it is characterized in that optical fiber optical grating stress sensor and fiber-optical grating temperature sensor comprises: fiber grating, sheet metal, there is the coat of metal on the fiber grating surface, and has name a person for a particular job fiber grating and sheet metal of metal welding to weld together.
3, a kind of fiber grating dynamometer anchor cable strain gauge as claimed in claim 1, it is characterized in that six optical fiber optical grating stress sensors are evenly distributed in the outside surface and the inside surface of annular elastomeric, by the welding of laser electric welding machine, direction of welding is parallel to the stress direction that annular elastomeric is born.
4, a kind of fiber grating dynamometer anchor cable strain gauge as claimed in claim 1 is characterized in that two fiber-optical grating temperature sensors lay respectively at the outside surface and the inside surface of annular elastomeric, carry out temperature compensation to this anchor cable stress measurement system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410061482 CN1632488A (en) | 2004-12-31 | 2004-12-31 | Anchor cable stress sensor for optical fiber grating dynamometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410061482 CN1632488A (en) | 2004-12-31 | 2004-12-31 | Anchor cable stress sensor for optical fiber grating dynamometer |
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| CN1632488A true CN1632488A (en) | 2005-06-29 |
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| CN 200410061482 Pending CN1632488A (en) | 2004-12-31 | 2004-12-31 | Anchor cable stress sensor for optical fiber grating dynamometer |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381845C (en) * | 2006-07-20 | 2008-04-16 | 上海交通大学 | Optical fiber grating door opening and closing state sensor probe |
| CN101571380B (en) * | 2009-06-09 | 2011-04-06 | 中国人民解放军海军工程大学 | Wide range fiber grating strain transducer |
| CN101738170B (en) * | 2009-12-18 | 2011-05-04 | 北京科技大学 | Distributed fiber sensor for large deformation measurement |
| CN102162760A (en) * | 2010-12-29 | 2011-08-24 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Cable force monitoring device for attached-type stay cable |
| EP2484834A1 (en) * | 2009-09-30 | 2012-08-08 | Fasten Group Company Ltd | Bridge intelligent cable system with built-in fiber grating sensor |
| CN101526409B (en) * | 2009-04-20 | 2012-12-05 | 重庆大学 | Super large cable force self-sensing intelligent cable and measuring method based on fiber strain sensing |
| CN103353367A (en) * | 2013-07-04 | 2013-10-16 | 中山大学 | Rock and soil reinforcement bar outer end force sensor based on fiber bragg grating |
| CN103822738A (en) * | 2014-01-03 | 2014-05-28 | 重庆大学 | Stress sensor based on fiber gratings |
| CN104280169A (en) * | 2014-10-17 | 2015-01-14 | 武汉理工大学 | Ring type fiber bragg grating force measurement device and application thereof |
| CN104697682A (en) * | 2014-04-04 | 2015-06-10 | 南京大学（苏州）高新技术研究院 | Fiber Bragg grating strain-measuring method and fiber Bragg grating strain sensor |
| CN104897321A (en) * | 2015-06-24 | 2015-09-09 | 潍坊学院 | Prefabricated opening concrete tubular pile body inner wall shearing strength testing device and method |
| CN105421501A (en) * | 2015-12-15 | 2016-03-23 | 中国一冶集团有限公司 | Method for monitoring working state of anchor rod and deformation condition of surrounding soil at sludge environment |
| CN106436570A (en) * | 2016-08-31 | 2017-02-22 | 杭州浙锚预应力有限公司 | Intelligent stay cable anchor device |
| CN106906824A (en) * | 2015-12-22 | 2017-06-30 | 中国水利水电科学研究院 | Distribution type fiber-optic prestressing force intellectual monitoring anchor cable |
| CN107367239A (en) * | 2016-05-12 | 2017-11-21 | 中国计量大学 | A kind of loop configuration high-temperature pipe outer wall strain detecting fiber-optic grating sensor part |
| CN107957306A (en) * | 2018-01-11 | 2018-04-24 | 盐城工学院 | A kind of Character of Cable Force of Cable stayed Bridge stress torsion detection sensor based on fiber grating |
| CN108627289A (en) * | 2018-06-07 | 2018-10-09 | 广西大学 | A kind of high sensitivity dynamometry ring sensor |
| CN110082023A (en) * | 2019-05-09 | 2019-08-02 | 湖北工业大学 | A kind of real-time monitoring for cable force device and monitoring method |
| CN110864840A (en) * | 2019-11-29 | 2020-03-06 | 北京瑞格星科技有限公司 | Cable force measuring sensor |
| CN111337170A (en) * | 2020-03-20 | 2020-06-26 | 南京智慧基础设施技术研究院有限公司 | Optical fiber sensing method for detecting tension of stay cable |
-
2004
- 2004-12-31 CN CN 200410061482 patent/CN1632488A/en active Pending
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381845C (en) * | 2006-07-20 | 2008-04-16 | 上海交通大学 | Optical fiber grating door opening and closing state sensor probe |
| CN101526409B (en) * | 2009-04-20 | 2012-12-05 | 重庆大学 | Super large cable force self-sensing intelligent cable and measuring method based on fiber strain sensing |
| CN101571380B (en) * | 2009-06-09 | 2011-04-06 | 中国人民解放军海军工程大学 | Wide range fiber grating strain transducer |
| EP2484834A4 (en) * | 2009-09-30 | 2014-07-16 | Fasten Group Company Ltd | Bridge intelligent cable system with built-in fiber grating sensor |
| EP2484834A1 (en) * | 2009-09-30 | 2012-08-08 | Fasten Group Company Ltd | Bridge intelligent cable system with built-in fiber grating sensor |
| CN101738170B (en) * | 2009-12-18 | 2011-05-04 | 北京科技大学 | Distributed fiber sensor for large deformation measurement |
| CN102162760B (en) * | 2010-12-29 | 2012-10-10 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Cable force monitoring device for attached-type stay cable |
| CN102162760A (en) * | 2010-12-29 | 2011-08-24 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Cable force monitoring device for attached-type stay cable |
| CN103353367A (en) * | 2013-07-04 | 2013-10-16 | 中山大学 | Rock and soil reinforcement bar outer end force sensor based on fiber bragg grating |
| CN103353367B (en) * | 2013-07-04 | 2016-10-26 | 中山大学 | A kind of rock-reinforcing rod member outer end based on fiber grating force cell |
| CN103822738A (en) * | 2014-01-03 | 2014-05-28 | 重庆大学 | Stress sensor based on fiber gratings |
| CN104697682A (en) * | 2014-04-04 | 2015-06-10 | 南京大学（苏州）高新技术研究院 | Fiber Bragg grating strain-measuring method and fiber Bragg grating strain sensor |
| CN104280169A (en) * | 2014-10-17 | 2015-01-14 | 武汉理工大学 | Ring type fiber bragg grating force measurement device and application thereof |
| CN104897321A (en) * | 2015-06-24 | 2015-09-09 | 潍坊学院 | Prefabricated opening concrete tubular pile body inner wall shearing strength testing device and method |
| CN104897321B (en) * | 2015-06-24 | 2016-08-24 | 潍坊学院 | Wall shearing stress method of testing in a kind of pre-formed members concrete tubular pile pile body |
| CN105421501A (en) * | 2015-12-15 | 2016-03-23 | 中国一冶集团有限公司 | Method for monitoring working state of anchor rod and deformation condition of surrounding soil at sludge environment |
| CN106906824A (en) * | 2015-12-22 | 2017-06-30 | 中国水利水电科学研究院 | Distribution type fiber-optic prestressing force intellectual monitoring anchor cable |
| CN107367239A (en) * | 2016-05-12 | 2017-11-21 | 中国计量大学 | A kind of loop configuration high-temperature pipe outer wall strain detecting fiber-optic grating sensor part |
| CN106436570A (en) * | 2016-08-31 | 2017-02-22 | 杭州浙锚预应力有限公司 | Intelligent stay cable anchor device |
| CN107957306A (en) * | 2018-01-11 | 2018-04-24 | 盐城工学院 | A kind of Character of Cable Force of Cable stayed Bridge stress torsion detection sensor based on fiber grating |
| CN108627289A (en) * | 2018-06-07 | 2018-10-09 | 广西大学 | A kind of high sensitivity dynamometry ring sensor |
| CN110082023A (en) * | 2019-05-09 | 2019-08-02 | 湖北工业大学 | A kind of real-time monitoring for cable force device and monitoring method |
| CN110082023B (en) * | 2019-05-09 | 2021-03-16 | 湖北工业大学 | Cable force real-time monitoring device and monitoring method |
| CN110864840A (en) * | 2019-11-29 | 2020-03-06 | 北京瑞格星科技有限公司 | Cable force measuring sensor |
| CN111337170A (en) * | 2020-03-20 | 2020-06-26 | 南京智慧基础设施技术研究院有限公司 | Optical fiber sensing method for detecting tension of stay cable |
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