CN1632469A - Soft packaging optical fiber grating sensor with vernier wavelength - Google Patents
Soft packaging optical fiber grating sensor with vernier wavelength Download PDFInfo
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- CN1632469A CN1632469A CN 200410093318 CN200410093318A CN1632469A CN 1632469 A CN1632469 A CN 1632469A CN 200410093318 CN200410093318 CN 200410093318 CN 200410093318 A CN200410093318 A CN 200410093318A CN 1632469 A CN1632469 A CN 1632469A
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- anchor clamps
- fiber
- fixed block
- grating sensor
- optical fiber
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Abstract
This invention relates to an optical fiber and grating sensor with adjustable wavelength and one optical section with light fiber and grating, which are characterized by that the optical fiber goes through the protection cover tube, first clamper middle hole and second clamper middle hole. The said protective cover tube both ends are separately stuck to first and second clampers with soft glue and adhesive agent and stretches the optical section with optical fiber and grating and ensures the optical fiber and grating at the right middle of the protection cover tube. This invention fills the two holes with fix glue stuck to first and second clampers to form one body to make the optical fiber and grating sensor. The said first and second clampers outside screw are located with micro-adjust screw cap.
Description
Technical field
The present invention relates to sensor, particularly a kind of have a wavelength soft packaging optical fiber grating sensor with vernier.Be mainly used in the strain of construction work and other structural member and the sensing detection of temperature.
Background technology
Fiber grating is a kind of optical filter with narrowband reflection characteristic that is produced on the optical fiber.Because elastic deformation, thermal expansion character and hot light thereof, the elasto-optical effect of silica fibre, it has the sensitivity characteristic to temperature and stress.This sensitivity characteristic is linear in certain scope, meets following relation:
Δλ
ε/λ＝ε(1+γ) (1)
Δλ
T/λ＝(α+e)ΔT (2)
In the formula: ε is the strain of optical fiber, and γ is the elasto-optical coefficient of fiber optic materials, and α is the coefficient of thermal expansion of fiber optic materials, and Δ T is a temperature variation,
Be thermo-optical coeffecient.Just can determine the temperature and the stress of institute's perception according to above-mentioned relation by measuring wavelength change.Utilize this characteristic fiber grating can be made into strain transducer and temperature sensor, and derive the sensor of other physical quantitys such as gaging pressure, acceleration, flow, displacement.
The major advantage that fiber grating is used for sensory field is: anti-electromagnetic interference capability is strong, corrosion-resistant, sensing head is not charged, is suitable for forceful electric power and anti-electric field closes; Can directly be connected with fibre system, and can be multiplexed, be convenient to constitute various forms of optical fiber sensing networks, the distributed fiber grating sensor array that especially adopts wavelength-division multiplex technique to constitute can carry out large-area multimetering; Stability and good reliability, volume is little, precision is high; Be convenient to imbed composite element and heavy construction building interior etc., states such as the integrality of structure, security, load fatigue, degree of injury are carried out continuous real-time monitoring.
The principal ingredient of optical fiber is SiO
2, the bare fibre that is used to make fiber grating is very thin especially again, and its external diameter has only about 125 microns, fragility very, therefore, if it directly is applied in the engineering as sensing element, the installation technics difficulty is very big.People generally are pasted on it on kapillary or the thin slice and are made into sensing element, though this measure can address the above problem to a certain extent, its layout difficulty does not obtain change fundamentally.And this sensing element is subjected to the common restriction of glue, kapillary or thin slice, is subjected to the influence of packaging technology very big, must demarcate one by one, and linearity variation, the range of sensing measurement reduces; Wavelength tuning is also relatively more difficult, is unfavorable for the application of wavelength-division multiplex technique, also just is unfavorable for carrying out large-area multimetering, has brought no small restriction to practical application.
Summary of the invention
In order to overcome above-mentioned shortcoming, the invention provides the fine-tuning fiber-optic grating sensor of a kind of wavelength.
Technical scheme of the present invention is as follows:
The fiber-optic grating sensor that a kind of wavelength is fine-tuning; one contains the fiber segment of fiber grating; it is characterized in that this fiber segment passes protective casing; aperture in the middle of first anchor clamps and the aperture in the middle of second anchor clamps; the two ends of described protective casing are respectively with flexible glue and the tackifier and first anchor clamps; second anchor clamps are bonding; the fiber segment that will contain fiber grating is stretched the middle that Bing Bao Certificate fiber grating is in this protective casing; in two apertures, fill up fixing glue respectively with first anchor clamps and second anchor clamps formation one that is adhesively fixed; form fiber-optic grating sensor, the external thread in the outside of described first anchor clamps and second anchor clamps is provided with the fine setting nut.
Described first anchor clamps and second anchor clamps respectively are installed in the pickup groove of a fixed block that is made of last fixed block and following fixed block, and the last fixed block of this fixed block and following fixed block and first anchor clamps and second anchor clamps are fastening by fastening screw.
Adopt the weldering knot fixing between described second anchor clamps and the protective casing, or spiral marking connection is fixed.
The fixedly employing welding on described fixed block down and object under test surface is fixing, or screw is fastening.
Advantage of the present invention and characteristics are as follows:
1. solved the installation technics difficult problem of fiber-optic grating sensor;
2. because after the installation of this fiber-optic grating sensor, its emergent property and temperature characterisitic still are equal to fiber grating, help the temperature compensation of fiber-optic grating sensor, linear response is good, precision is high, measure the big characteristics of range so have;
3. this fiber-optic grating sensor has the function of wavelength fine setting, help multiplexed, be convenient to constitute various forms of optical fiber sensing networks, the distributed fiber grating sensor array that especially adopts wavelength-division multiplex technique to constitute can carry out large-area multimetering;
4. simple in structure, volume is little, uses reliable and stablely, has good cost performance, and expection has good market outlook.
5. be applicable to the strain and the temperature monitoring of heavy construction building and other structural member.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is a scheme of installation of the present invention
Fig. 3 is the left and right synoptic diagram of looking after the present invention installs
Among the figure: 1-first anchor clamps, 2-protective casing, 3-second anchor clamps, 4-fiber grating, 5-first aperture; 6-second aperture, 7-fixing glue, 8-flexible glue, 9-tackifier, fixed block under the 10-; the last fixed block of 11-, 12-pickup groove, the fastening screw of 13-, 14-fine setting Luo cap, 15-fine setting Luo line
Embodiment
See also Fig. 1 earlier; Fig. 2 and shown in Figure 3; Fig. 1; Fig. 2 and Fig. 3 are the embodiment of wavelength soft packaging optical fiber grating sensor with vernier of the present invention; as seen from the figure; the fiber-optic grating sensor that wavelength of the present invention is fine-tuning; the fiber segment that contains fiber grating 4; this fiber segment is passed protective casing 2; second aperture 6 in the middle of first aperture 5 in the middle of first anchor clamps 1 and second anchor clamps 3; the two ends of described protective casing 2 are respectively with flexible glue 8 and the tackifier 9 and first anchor clamps 1; second anchor clamps 3 are bonding; the fiber segment that will contain fiber grating 4 is stretched the middle that Bing Bao Certificate fiber grating 4 is in this protective casing 2; in first aperture 5 and second aperture 6, fill up fixing glue 7 respectively with first anchor clamps 1 and the second anchor clamps 3 formation one that is adhesively fixed; form fiber-optic grating sensor, the external thread 15 in the outside of described first anchor clamps 1 and second anchor clamps 3 is provided with fine setting nut 14.
Described first anchor clamps 1 and second anchor clamps 3 respectively are installed in the pickup groove 12 of a fixed block that is made of last fixed block 11 and following fixed block 10, and the last fixed block 11 of this fixed block and following fixed block 10 and first anchor clamps 1 and second anchor clamps 3 are fastening by fastening screw 13.
Adopt the weldering knot fixing between described second anchor clamps 3 and the protective casing 2, or spiral marking connection is fixed.
Fixed block 10 and object under test surface fixedly is that welding is fixing under described, or screw is fastening.
The diameter of described first aperture 5, second aperture 6 and protective casing 2 is greater than 250 microns, and the point of fixity at first anchor clamps 1 and second anchor clamps 3 and place thereof is two point of fixity of fiber-optic grating sensor.Like this, the stress that testee produces under external force, temperature action, strain promptly can be delivered on the fiber grating, and the wavelength of fiber-optic grating sensor changes thereupon, thereby measure the strain and the temperature variation of testee.
Claims (4)
1; the fiber-optic grating sensor that a kind of wavelength is fine-tuning; one contains the fiber segment of fiber grating (4); it is characterized in that this fiber segment passes protective casing (2); first aperture (5) in the middle of first anchor clamps (1) and second aperture (6) in the middle of second anchor clamps (3); the two ends of described protective casing (2) are respectively with flexible glue (8) and tackifier (9) and first anchor clamps (1); second anchor clamps (3) are bonding; the fiber segment that will contain fiber grating (4) is stretched the middle that Bing Bao Certificate fiber grating (4) is in this protective casing (2); in first aperture (5) and second aperture (6), fill up fixing glue (7) respectively with first anchor clamps (1) and second anchor clamps (3) the formation one that is adhesively fixed; form fiber-optic grating sensor, the external thread (15) in the outside of described first anchor clamps (1) and second anchor clamps (3) is provided with fine setting nut (14).
2, the fine-tuning fiber-optic grating sensor of wavelength according to claim 1, it is characterized in that described first anchor clamps (1) and second anchor clamps (3) respectively are installed in the pickup groove (12) of a fixed block that is made of last fixed block (11) and following fixed block (10), the last fixed block (11) of this fixed block and following fixed block (10) and first anchor clamps (1) and second anchor clamps (3) are fastening by fastening screw (13).
3, the fine-tuning fiber-optic grating sensor of wavelength according to claim 1 it is characterized in that adopting between described second anchor clamps (3) and the protective casing (2) the weldering knot fixing, or spiral marking connection is fixed.
4, the fine-tuning fiber-optic grating sensor of wavelength according to claim 1, what it is characterized in that described fixed block (10) down and object under test surface fixedly is that welding is fixing, or screw is fastening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100933185A CN1295531C (en) | 2004-12-21 | 2004-12-21 | Soft packaging optical fiber grating sensor with vernier wavelength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100933185A CN1295531C (en) | 2004-12-21 | 2004-12-21 | Soft packaging optical fiber grating sensor with vernier wavelength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632469A true CN1632469A (en) | 2005-06-29 |
| CN1295531C CN1295531C (en) | 2007-01-17 |
Family
ID=34847717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100933185A Expired - Fee Related CN1295531C (en) | 2004-12-21 | 2004-12-21 | Soft packaging optical fiber grating sensor with vernier wavelength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1295531C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397903B (en) * | 2008-11-05 | 2012-08-29 | 大庆油田有限责任公司 | Method for monitoring sleeve circumferential strain by using optical fibre grating sensor |
| CN104215366A (en) * | 2013-05-30 | 2014-12-17 | 成都阜特科技股份有限公司 | Optical fiber grating sensor packaging system |
| CN104655320A (en) * | 2014-11-25 | 2015-05-27 | 中国人民解放军第二炮兵工程大学 | Tunable OFGB (optical fiber Bragg grating) low temperature sensor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636838B (en) * | 2012-05-16 | 2013-09-11 | 杭州联光电子有限公司 | Package method and device for fiber bragg grating with adjustable central wavelength and adjustable temperature coefficient |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3337408B2 (en) * | 1997-11-27 | 2002-10-21 | 日本電信電話株式会社 | Chirped variable reflection type optical fiber grating filter |
| US5991483A (en) * | 1998-02-10 | 1999-11-23 | Lucent Technologies Inc. | Optical fiber grating packages |
| US6278811B1 (en) * | 1998-12-04 | 2001-08-21 | Arthur D. Hay | Fiber optic bragg grating pressure sensor |
| JP2001108845A (en) * | 1999-10-01 | 2001-04-20 | Sumitomo Electric Ind Ltd | Method of mounting optical fiber diffraction grating |
| US6278819B1 (en) * | 1999-10-12 | 2001-08-21 | Corning Incorporated | Method and apparatus for manufacturing optical fiber components |
| US6396982B1 (en) * | 2000-08-01 | 2002-05-28 | Rich Key Technologies Limited | Bimetal-based temperature stabilized multi-FBG package with tunable mechanism |
| CN1216278C (en) * | 2003-07-14 | 2005-08-24 | 徐志宏 | Packaging structure of fibre-optical grating |
| CN2783269Y (en) * | 2004-12-21 | 2006-05-24 | 中国科学院上海光学精密机械研究所 | Wavelength fine adjustable soft packaged optical fibre raster sensor |
-
2004
- 2004-12-21 CN CNB2004100933185A patent/CN1295531C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397903B (en) * | 2008-11-05 | 2012-08-29 | 大庆油田有限责任公司 | Method for monitoring sleeve circumferential strain by using optical fibre grating sensor |
| CN104215366A (en) * | 2013-05-30 | 2014-12-17 | 成都阜特科技股份有限公司 | Optical fiber grating sensor packaging system |
| CN104655320A (en) * | 2014-11-25 | 2015-05-27 | 中国人民解放军第二炮兵工程大学 | Tunable OFGB (optical fiber Bragg grating) low temperature sensor |
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| Publication number | Publication date |
|---|---|
| CN1295531C (en) | 2007-01-17 |
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