CN103307995B - Two-way long gauge length optical fibre grating strain transducer - Google Patents
Two-way long gauge length optical fibre grating strain transducer Download PDFInfo
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- CN103307995B CN103307995B CN201310260304.7A CN201310260304A CN103307995B CN 103307995 B CN103307995 B CN 103307995B CN 201310260304 A CN201310260304 A CN 201310260304A CN 103307995 B CN103307995 B CN 103307995B
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- fiber
- rustless steel
- stainless steel
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- optical fibre
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Abstract
The invention discloses a kind of two-way long gauge length optical fibre grating strain transducer, it includes two mutually perpendicular measurement apparatus connected as one via elbow；Measurement apparatus includes stress and variant part, fiber-optic grating sensor and the fiber grating adjusting apparatus being connected with fiber-optic grating sensor；Stress and variant part include 2 rustless steel disks and are located at the stainless steel tube between rustless steel disk；Fiber-optic grating sensor is arranged in stainless steel tube, its one end is connected with fiber grating adjusting apparatus, the other end is connected with the fiber-optic grating sensor of another measurement apparatus by the optical fiber that connects being located in elbow, and fiber-optic grating sensor is connected on stainless steel inside pipe wall via two bonding points.The present invention is provided with two measurement apparatus, can disposably read the strain data of both direction, it is to avoid repeatedly bury sensor underground；Be provided with rustless steel sleeve pipe, can more abundant to sensor protection, prevent from ground roller compaction process affect normally working of sensor.
Description
Technical field
The present invention relates to a kind of device in pavement structure, highway monitored in real time, especially a kind of
Two-way long gauge length optical fibre grating sensor, belongs to ess-strain detection device.
Background technology
In engineering practice, traditional resistance strain gage plays important role in the test of civil engineering always,
But in highway structure, tradition foil gauge can not meet present measurement requirement.Owing to measurement apparatus needs embedment
Ground, is easy to damage in ground roller compaction process.Monitoring would generally need to measure the ess-strain of different directions, and one by one
Embedment sensor is wasted time and energy, and causes unnecessary waste.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of two ess-strains can simultaneously measured in vertical direction
Two-way long gauge length optical fibre grating sensor.
For solving above-mentioned technical problem, the technical solution used in the present invention is: a kind of two-way long gauge length optical fibre grating should
Becoming sensor, its key technology is: it includes two mutually perpendicular measurement apparatus connected as one via elbow；
Described measurement apparatus includes stress and variant part, fiber-optic grating sensor and is connected with fiber-optic grating sensor
Fiber grating adjusting apparatus；
Described stress and variant part include 2 the rustless steel disks bearing pressure and are located between 2 rustless steel disks
And the stainless steel tube being integrated with, the diameter of described stainless steel tube is less than the diameter of rustless steel disk；
Described fiber-optic grating sensor is arranged in stainless steel tube, and its one end is connected with fiber grating adjusting apparatus, the other end
It is connected with the fiber-optic grating sensor of another measurement apparatus by the optical fiber that connects being located in elbow, described optical fiber grating sensing
Device is connected on stainless steel inside pipe wall via two bonding points kept at a certain distance away.
Further improve, in order to prevent being rolled during using damaging, also include being located at outside stainless steel tube not
Rust steel thimble, described rustless steel sleeve pipe one end and the rustless steel disk contact of measurement apparatus, the other end and another rustless steel circle
Leaving gap between dish, gap is 1mm.
Further improving, be provided with rustless steel cylinder between above-mentioned rustless steel disk and stainless steel tube, three is integrated knot
Structure.
Preferably, described stress and variant part length are at least 18, a diameter of 25-35 mm of described rustless steel disk,
Thickness 3-7mm, the external diameter of described rustless steel cylinder is 10-18mm, and internal diameter is 1mm, and length is at least 5mm, described stainless steel tube
External diameter be 3-5mm, internal diameter is 1-2mm.
Preferably, the external diameter of above-mentioned rustless steel sleeve pipe be 18mm, internal diameter be 14mm.
Use and have the beneficial effects that produced by technique scheme: the present invention is provided with two measurement apparatus, Ke Yiyi
Secondary property reads the strain data of both direction, it is to avoid repeatedly bury sensor underground.The present invention is provided with rustless steel sleeve pipe, can be to biography
It is more abundant that sensor is protected, and prevents from affecting in ground roller compaction process the normal work of sensor.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Wherein, 101, rustless steel disk, 102, rustless steel cylinder, 103, stainless steel tube, 104, adhesive spots；2, stainless steel sleeve
Pipe；3, gap；4, fiber-optic grating sensor；5, grating is connected；6, fiber grating reconciles instrument；7, elbow.
Detailed description of the invention
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
Seeing accompanying drawing 1, a kind of two-way long gauge length optical fibre grating strain transducer, it includes that two are connected as via elbow 7
The mutually perpendicular measurement apparatus of one.
Described measurement apparatus includes stress and variant part, fiber-optic grating sensor 4 and is connected with fiber-optic grating sensor 4
Fiber grating adjusting apparatus 6.
Described stress and variant part include 2 the rustless steel disks 101 bearing pressure and are located at 2 rustless steel disks
Between 101 and the stainless steel tube 103 that is integrated with, the diameter of described stainless steel tube 103 is straight less than rustless steel disk 101
Footpath；By rustless steel cylinder 102 transition arranged, this rustless steel cylinder between described rustless steel disk 101 and stainless steel tube 103
102 can be that stainless steel sleeve pipe provides support.Rustless steel sleeve pipe 2, described rustless steel sleeve pipe are set outside described stainless steel tube 103
2 one end contact with the rustless steel disk 101 of measurement apparatus, leave gap 3 between the other end and another rustless steel disk, described
Gap 3 is 1mm.The external diameter of described rustless steel sleeve pipe 2 is 18mm, internal diameter is 14mm.
Described stress and variant part entire length are at least 18, a diameter of 25-35 mm of described rustless steel disk, thickness
Degree 3-7mm, the external diameter of described rustless steel cylinder is 10-18mm, and internal diameter is 1mm, and length is at least 5mm, described stainless steel tube
External diameter is 3-5mm, and internal diameter is 1-2mm.
Described fiber-optic grating sensor 4 is arranged in stainless steel tube 103, and its one end is connected with fiber grating adjusting apparatus 6, separately
One end is connected with the fiber-optic grating sensor of another measurement apparatus by the optical fiber 5 that connects being located in elbow 7, described optical fiber light
Gate sensor 4 is connected on stainless steel tube 103 inwall via two bonding points kept at a certain distance away 104, two bonding point distances
Not less than 15cm, because sensor measurement is the mean strain in gauge length, use long gauge length can reduce incidental error.
This rustless steel disk 101, stainless steel tube 103 and rustless steel sleeve pipe 2 may be used without other materials, the most general steel,
Irony or Other Engineering plastics, satisfied use requires.
During use, according to required measurement requirement direction, the present invention is imbedded in highway pavement or ground, connect fiber grating
(FBG) demodulator 6.The rustless steel sleeve pipe 2 of steel can protect fiber-optic grating sensor 4 when roadbed or pavement construction in roller compaction process
Avoid being destroyed.When road surface stress deformation, soil particle can produce pressure to rustless steel disk 101 part both sides, drives stainless
Steel pipe 103 deforms, and by adjusting the cross sectional dimensions of 103 and 101, can obtain different ratios of rigidity so that inventive sensor
Having different sensitivity, fiber-optic grating sensor 4 the most on its interior just can record corresponding data.
Claims (6)
1. a two-way long gauge length optical fibre grating strain transducer, it is characterised in that: it includes that two are connected as via elbow (7)
The mutually perpendicular measurement apparatus of one；
Described measurement apparatus includes stress and variant part, fiber-optic grating sensor (4) and is connected with fiber-optic grating sensor (4)
Fiber grating adjusting apparatus (6)；
Described stress and variant part include 2 the rustless steel disks (101) bearing pressure and are located at 2 rustless steel disks
(101) between and the stainless steel tube (103) that is integrated with, the diameter of described stainless steel tube (103) is less than rustless steel disk
(101) diameter；
Described fiber-optic grating sensor (4) is arranged in stainless steel tube (103), and its one end is connected with fiber grating adjusting apparatus (6),
The other end is connected with the fiber-optic grating sensor of another measurement apparatus by the connection optical fiber (5) being located in elbow (7), described
Fiber-optic grating sensor (4) is connected on stainless steel tube (103) inwall via two bonding points kept at a certain distance away (104).
Two-way long gauge length optical fibre grating strain transducer the most according to claim 1, it is characterised in that: also include being located at not
The rustless steel sleeve pipe (2) in rust steel pipe (103) outside, described rustless steel sleeve pipe (2) one end and the rustless steel disk of measurement apparatus
(101) contact, leaves gap (3) between the other end and another rustless steel disk.
Two-way long gauge length optical fibre grating strain transducer the most according to claim 2, it is characterised in that: described rustless steel circle
Being provided with rustless steel cylinder (102) between dish (101) and stainless steel tube (103), three is structure as a whole.
4. according to the two-way long gauge length optical fibre grating strain transducer described in any one of claim 1-3, it is characterised in that: described
Stress and variant part length are at least 18, a diameter of 25-35 mm, the thickness 3-7mm of described rustless steel disk (101), described
The external diameter of rustless steel cylinder (102) is 10-18mm, and internal diameter is 1mm, and length is at least 5mm, outside described stainless steel tube (103)
Footpath is 3-5mm, and internal diameter is 1-2mm.
Two-way long gauge length optical fibre grating strain transducer the most according to claim 3, it is characterised in that: described stainless steel sleeve
The external diameter of pipe (2) is 14-20 mm, internal diameter is 10-18 mm.
Two-way long gauge length optical fibre grating strain transducer the most according to claim 2, it is characterised in that: described gap (3)
For 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310260304.7A CN103307995B (en) | 2013-06-27 | 2013-06-27 | Two-way long gauge length optical fibre grating strain transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310260304.7A CN103307995B (en) | 2013-06-27 | 2013-06-27 | Two-way long gauge length optical fibre grating strain transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103307995A CN103307995A (en) | 2013-09-18 |
| CN103307995B true CN103307995B (en) | 2016-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310260304.7A Expired - Fee Related CN103307995B (en) | 2013-06-27 | 2013-06-27 | Two-way long gauge length optical fibre grating strain transducer |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197284B (en) * | 2016-06-27 | 2018-08-14 | 郑州市交通规划勘察设计研究院 | Wide range optical fibre displacement sensor |
| CN111006606B (en) * | 2019-12-31 | 2021-01-05 | 山东科技大学 | On-line monitoring system and monitoring method for deformation of filling body based on fiber bragg grating sensing |
| CN111006605B (en) * | 2019-12-31 | 2021-02-05 | 山东科技大学 | Pre-buried type filling body transverse deformation measuring device based on fiber grating sensing |
| CN111044005B (en) * | 2019-12-31 | 2021-02-05 | 山东科技大学 | Pre-buried formula obturator lateral deformation measuring device |
| CN111006607B (en) * | 2019-12-31 | 2021-01-08 | 山东科技大学 | Filling body transverse deformation on-line monitoring system based on fiber bragg grating sensing |
| CN111707208A (en) * | 2020-06-24 | 2020-09-25 | 东南大学 | Cylindrical shell structure cross section deformation monitoring method based on distributed macro strain sensing |
| CN113432639A (en) * | 2021-05-25 | 2021-09-24 | 上海大学 | Bidirectional fiber grating bivariate sensor based on optical fiber sensing |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6420696B1 (en) * | 1999-12-27 | 2002-07-16 | Thomas E. Bennett | Embedded sensor having an identifiable orientation |
| JP3797880B2 (en) * | 2001-02-26 | 2006-07-19 | 沖電気工業株式会社 | FBG strain sensor |
| CN201662391U (en) * | 2010-03-05 | 2010-12-01 | 昆明理工大学 | Large-strain optical fiber Bragg grating sensor |
| CN101793573A (en) * | 2010-03-26 | 2010-08-04 | 昆明理工大学 | FBG on-line monitoring method of pressure pipeline |
| CN201724688U (en) * | 2010-06-24 | 2011-01-26 | 上海启鹏工程材料科技有限公司 | Fiber bragg grating sensor for building and structure healthy detection |
| CN202614196U (en) * | 2012-05-09 | 2012-12-19 | 中国电子科技集团公司第八研究所 | Optical fiber strain sensor |
| CN202709999U (en) * | 2012-06-28 | 2013-01-30 | 韦春龙 | Optical fiber grating strain sensor having integrated strain unit |
| CN102865827A (en) * | 2012-06-29 | 2013-01-09 | 杭州珏光物联网科技有限公司 | Fiber Bragg grating strain sensor |
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| CN103307995A (en) | 2013-09-18 |
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