CN201945413U - Fiber bragg grating arch bridge pressure sensor - Google Patents
Fiber bragg grating arch bridge pressure sensor Download PDFInfo
- Publication number
- CN201945413U CN201945413U CN2011200492703U CN201120049270U CN201945413U CN 201945413 U CN201945413 U CN 201945413U CN 2011200492703 U CN2011200492703 U CN 2011200492703U CN 201120049270 U CN201120049270 U CN 201120049270U CN 201945413 U CN201945413 U CN 201945413U
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- arch
- arch bridge
- fiber grating
- bragg grating
- fiber bragg
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Abstract
The utility model discloses a fiber bragg grating arch bridge pressure sensor which comprises a combined metal case, an arch bridge elastic device, a metal wire and a fiber bragg grating. The two ends of the metal wire are connected with the central part of the arch bridge elastic device. The fiber bragg grating is attached to the metal wire. The combined metal case comprises an upper portion and a lower portion. The upper portion and the lower portion can move vertically and relatively. When the upper portion of the combined metal case bears pressure, the pressure impacts completely on the upper portion of the arch bridge elastic device. One end of the arch bridge elastic device is fixed at the bottom of the metal case. The other end of the arch bridge elastic device is a movable end. The pressure sensor based on an optical fiber sense is formed by the fiber bragg grating sensing technology and realizes the high accuracy test of the vertical stress.
Description
Technical field
The utility model relates to sensor technical field, the arch-shaped pressure transducer of especially a kind of fiber grating.
Background technology
Sensor technology is a gordian technique of modern science and technology, and many electricity consumptions of existing sensors formula sensor carries out the measurement of stress, be prone to precision not high, be subject to external interference and lost efficacy problems such as (the particularly influences of water).
Fiber grating has been the emerging in the world passive sensitive element of reflection filter a kind of extensive application prospect, function admirable since the nineties in 20th century, responds to extraneous small strain by moving of Bragg optical grating reflection wavelength and changes and realize the structure on-line measurement.Its ultimate principle is: when the light wave in the optical fiber passes through grating, the light that satisfies the grating wavelength condition is reflected and returns to form to be reflected light, remaining light becomes transmitted light, the variation of extraneous parameter will cause the drift of reflected light wavelength, and by can obtain the variable quantity of extraneous parameter to the detection of wavelength shift.Temperature and strain are the extraneous parameters that can directly change reflection wavelength.Optical fiber grating structure as shown in Figure 1, wherein 01 is fibre core, 02 for being wrapped in the covering of fibre core outside, Λ is the grating cycle; Energy distribution figure when Fig. 2 passes through grating for light, wherein 2-1 is an incident light spectrum, and 2-2 is a reflectance spectrum, and 2-3 is transmission (conduction) spectrum, and horizontal ordinate is represented wavelength, ordinate is represented energy, λ
bBe catoptrical centre wavelength.
Fiber grating has high measuring accuracy, and be not subjected to external interference such as electromagnetic radiation, also have multiple advantages such as the laying of being easy to, quasi-distributed measurement in addition, Given this, this technology has in a plurality of fields such as Aero-Space, compound substance, concrete structure engineering, power engineering and medical science and is used widely.
The utility model content
Technical problem to be solved in the utility model is at the deficiencies in the prior art, provides a kind of fiber grating arch-shaped pressure transducer.
The utility model adopts following technical scheme:
The arch-shaped pressure transducer of a kind of fiber grating comprises combined can, arch-shaped elastic force apparatus, tinsel and fiber grating; The tinsel two ends are connected with the middle part of described arch-shaped elastic force apparatus, paste fiber grating on the tinsel; Described combined can comprises the upper and lower, upper and lower relative motion up and down, when pressure was arranged at combined can top, this pressure all acted on arch-shaped elastic force apparatus top, arch-shaped elastic force apparatus one end is fixed on the can bottom, and an other end is movable end.
The arch-shaped pressure transducer of described fiber grating, described arch-shaped elastic force apparatus is a steel disc.
The arch-shaped pressure transducer of described fiber grating, described tinsel are steel wire.
The arch-shaped pressure transducer of described fiber grating, described combined can is a rectangular parallelepiped.
The arch-shaped pressure transducer of described fiber grating, described movable end contacts with the bottom of combined can, and there is a groove contact position, makes described movable end that abundant activity space be arranged.
By the pressure transducer of fiber grating sensing technology formation, realize the high precision measurement of pressure at right angle based on Fibre Optical Sensor.
Description of drawings
Fig. 1 optical fiber grating structure synoptic diagram;
Energy distribution figure when Fig. 2 passes through grating for light;
Fig. 3 the utility model sensor construction synoptic diagram
Fig. 4 is the partial enlarged drawing of Fig. 3;
Fig. 5 the utility model test process circuit theory synoptic diagram.
Embodiment
Below in conjunction with specific embodiment, the utility model is elaborated.
1, sensor construction
The utility model sensor concrete structure is shown in Fig. 3,4.Comprise rectangular parallelepiped combined (be divided into two parts up and down, two parts flexibly connect up and down) can 20, high strength steel disc 10, steel wire 50 and fiber grating 30.High strength steel disc 10 is converted into arch bridge, and steel wire 50 is pulled in the arch bridge middle part, pastes fiber grating 30 simultaneously on steel wire 50.Arch bridge one end 101 is fixed on the can bottom, and an other end is movable end 102.Movable end 102 contacted with 20 ends of can, and there is a light grade groove 40 contact position, made it that abundant activity space be arranged.Can is two parts relative motion up and down about in the of 20, and when can 20 tops had pressure to exist, metal top did not play a supportive role, and makes this pressure all act on the arch bridge top that high strength steel disc 10 forms.
2, working sensor principle
Arch bridge is subjected to upper pressure effect two ends to produce outwards movable trend, make the steel wire at middle part produce comparatively significantly tension, and then make the fiber grating of pasting on it produce stretching strain, catoptrical wave length shift takes place, by test to reflection wavelength, data processing can draw the size of top stress.
3, test process
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of the utility model claims.
Claims (5)
1. the arch-shaped pressure transducer of fiber grating is characterized in that, comprises combined can, arch-shaped elastic force apparatus, tinsel and fiber grating; The tinsel two ends are connected with the middle part of described arch-shaped elastic force apparatus, paste fiber grating on the tinsel; Described combined can comprises the upper and lower, upper and lower relative motion up and down, when pressure was arranged at combined can top, this pressure all acted on arch-shaped elastic force apparatus top, arch-shaped elastic force apparatus one end is fixed on the can bottom, and an other end is movable end.
2. the arch-shaped pressure transducer of fiber grating according to claim 1 is characterized in that described arch-shaped elastic force apparatus is a steel disc.
3. the arch-shaped pressure transducer of fiber grating according to claim 1 is characterized in that described tinsel is a steel wire.
4. the arch-shaped pressure transducer of fiber grating according to claim 1 is characterized in that described combined can is a rectangular parallelepiped.
5. the arch-shaped pressure transducer of fiber grating according to claim 1 is characterized in that described movable end contacts with the bottom of combined can, and there is a groove contact position, makes described movable end that abundant activity space be arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200492703U CN201945413U (en) | 2011-02-28 | 2011-02-28 | Fiber bragg grating arch bridge pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200492703U CN201945413U (en) | 2011-02-28 | 2011-02-28 | Fiber bragg grating arch bridge pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201945413U true CN201945413U (en) | 2011-08-24 |
Family
ID=44472752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200492703U Expired - Lifetime CN201945413U (en) | 2011-02-28 | 2011-02-28 | Fiber bragg grating arch bridge pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201945413U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175365A (en) * | 2011-02-28 | 2011-09-07 | 河南理工大学 | Fiber grating arch bridge-shaped pressure sensor |
| CN108871638A (en) * | 2018-04-25 | 2018-11-23 | 中国工程物理研究院化工材料研究所 | A kind of fiber optic measuring device and monitoring method of material residual stress |
-
2011
- 2011-02-28 CN CN2011200492703U patent/CN201945413U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175365A (en) * | 2011-02-28 | 2011-09-07 | 河南理工大学 | Fiber grating arch bridge-shaped pressure sensor |
| CN102175365B (en) * | 2011-02-28 | 2012-07-25 | 河南理工大学 | Fiber grating arch bridge-shaped pressure sensor |
| CN108871638A (en) * | 2018-04-25 | 2018-11-23 | 中国工程物理研究院化工材料研究所 | A kind of fiber optic measuring device and monitoring method of material residual stress |
| CN108871638B (en) * | 2018-04-25 | 2020-04-28 | 中国工程物理研究院化工材料研究所 | Optical fiber measuring device and monitoring method for residual stress of material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110824 Effective date of abandoning: 20120725 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110824 Effective date of abandoning: 20120725 |