CN2783269Y - Soft package fiber grating sensor with fine-adjustable wavelength - Google Patents
Soft package fiber grating sensor with fine-adjustable wavelength Download PDFInfo
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- CN2783269Y CN2783269Y CN 200420114528 CN200420114528U CN2783269Y CN 2783269 Y CN2783269 Y CN 2783269Y CN 200420114528 CN200420114528 CN 200420114528 CN 200420114528 U CN200420114528 U CN 200420114528U CN 2783269 Y CN2783269 Y CN 2783269Y
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- anchor clamps
- fiber grating
- grating sensor
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- 239000000835 fiber Substances 0.000 title claims abstract description 42
- 230000001681 protective effect Effects 0.000 claims abstract description 16
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- 239000013307 optical fiber Substances 0.000 claims description 14
- 238000004806 packaging method and process Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
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- 238000012544 monitoring process Methods 0.000 description 2
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- 238000005260 corrosion Methods 0.000 description 1
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- 230000010259 detection of temperature stimulus Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 230000005489 elastic deformation Effects 0.000 description 1
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- 230000001953 sensory effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
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Abstract
The utility model provides a wavelength can finely tune soft package fiber grating sensor, a fiber segment that contains fiber grating, characterized by this fiber segment passes the aperture in the middle of protective case, first anchor clamps and the aperture in the middle of the second anchor clamps, the both ends of protective case bond with flexible glue and adhesive and first anchor clamps, second anchor clamps respectively mutually, straighten the fiber segment that will contain fiber grating and guarantee that fiber grating is in the centre of this protective case, fill in the fixed glue in two apertures and bond fixedly with first anchor clamps and second anchor clamps respectively and constitute integratively, form the fiber grating sensor, the external screw thread in the outside of first anchor clamps and second anchor clamps on be equipped with the fine setting nut. The utility model provides a fiber grating sensor lay technological problem, simple structure moreover, it is small, use reliable and stable, have good price/performance ratio, expect to have fine market prospect.
Description
Technical field
The utility model relates to sensor, and 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 purpose of this utility model provides a kind of wavelength soft packaging optical fiber grating sensor with vernier.
The technical solution of the utility model is as follows:
A kind of wavelength soft packaging optical fiber grating sensor with vernier; comprise that 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 and is guaranteed that fiber grating is in the middle of 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 utility model 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 utility model
Fig. 2 is a scheme of installation of the present utility model
Fig. 3 is the left and right synoptic diagram of looking after the utility model is installed
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 utility model; as seen from the figure; the fiber-optic grating sensor that the utility model wavelength 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; a kind of wavelength soft packaging optical fiber grating sensor with vernier; comprise that 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 and is guaranteed that fiber grating (4) is in the middle of 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, wavelength soft packaging optical fiber grating sensor with vernier 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, wavelength soft packaging optical fiber grating sensor with vernier 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, wavelength soft packaging optical fiber grating sensor with vernier according to claim 2, 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 |
|---|---|---|---|
| CN 200420114528 CN2783269Y (en) | 2004-12-21 | 2004-12-21 | Soft package fiber grating sensor with fine-adjustable wavelength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420114528 CN2783269Y (en) | 2004-12-21 | 2004-12-21 | Soft package fiber grating sensor with fine-adjustable wavelength |
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| Publication Number | Publication Date |
|---|---|
| CN2783269Y true CN2783269Y (en) | 2006-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420114528 Expired - Lifetime CN2783269Y (en) | 2004-12-21 | 2004-12-21 | Soft package fiber grating sensor with fine-adjustable wavelength |
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| CN (1) | CN2783269Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295531C (en) * | 2004-12-21 | 2007-01-17 | 中国科学院上海光学精密机械研究所 | Soft package fiber grating sensor with fine-adjustable wavelength |
| CN105974154A (en) * | 2016-06-14 | 2016-09-28 | 昆明理工大学 | High-frequency FBG acceleration sensor with stainless steel capillary and polymer sensitized structure and use method thereof |
| CN107632389A (en) * | 2017-09-20 | 2018-01-26 | 濮阳光电产业技术研究院 | A kind of multi-wavelength fine setting meter based on fiber grating |
| CN107643130A (en) * | 2017-09-20 | 2018-01-30 | 濮阳光电产业技术研究院 | A kind of temperature sensitized optical fiber grating sensor |
| CN114136349A (en) * | 2021-11-16 | 2022-03-04 | 西安交通大学 | High-temperature-resistant Bragg fiber grating sensor with variable sensing quantity and preparation method thereof |
-
2004
- 2004-12-21 CN CN 200420114528 patent/CN2783269Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295531C (en) * | 2004-12-21 | 2007-01-17 | 中国科学院上海光学精密机械研究所 | Soft package fiber grating sensor with fine-adjustable wavelength |
| CN105974154A (en) * | 2016-06-14 | 2016-09-28 | 昆明理工大学 | High-frequency FBG acceleration sensor with stainless steel capillary and polymer sensitized structure and use method thereof |
| CN107632389A (en) * | 2017-09-20 | 2018-01-26 | 濮阳光电产业技术研究院 | A kind of multi-wavelength fine setting meter based on fiber grating |
| CN107643130A (en) * | 2017-09-20 | 2018-01-30 | 濮阳光电产业技术研究院 | A kind of temperature sensitized optical fiber grating sensor |
| CN107632389B (en) * | 2017-09-20 | 2024-01-19 | 濮阳光电产业技术研究院 | Multi-wavelength fine tuning meter based on fiber grating |
| CN114136349A (en) * | 2021-11-16 | 2022-03-04 | 西安交通大学 | High-temperature-resistant Bragg fiber grating sensor with variable sensing quantity and preparation method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20041221 |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20041221 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |