CN102466492A - Fiber grating sensor packaged by low-temperature glass powder - Google Patents
Fiber grating sensor packaged by low-temperature glass powder Download PDFInfo
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- CN102466492A CN102466492A CN2010105340834A CN201010534083A CN102466492A CN 102466492 A CN102466492 A CN 102466492A CN 2010105340834 A CN2010105340834 A CN 2010105340834A CN 201010534083 A CN201010534083 A CN 201010534083A CN 102466492 A CN102466492 A CN 102466492A
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- sensitive element
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- grating sensor
- fiber
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- 239000011521 glass Substances 0.000 title claims abstract description 34
- 239000000843 powder Substances 0.000 title claims abstract description 33
- 239000000835 fiber Substances 0.000 title claims abstract description 16
- 239000013307 optical fiber Substances 0.000 claims abstract description 19
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 36
- 238000005538 encapsulation Methods 0.000 claims description 20
- 238000005245 sintering Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 239000003292 glue Substances 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000012467 final product Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000382 optic material Substances 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to a fiber grating sensor packaged by low-temperature glass powder, which comprises: the material is the base of titanium alloy, the upper surface of the base is provided with a sensitive element groove used for placing a sensitive element of a fiber grating sensor in the middle, the left side and the right side of the sensitive element groove are symmetrically provided with a rectangular or cylindrical filling groove, the two filling grooves are used for filling low-temperature glass powder, the distance between the bottom of each filling groove and the bottom surface of the base is 1.8-2.5 mm, a strip-shaped thin groove used for placing optical fibers connected to the two ends of the sensitive element is arranged in the middle of the upper surface of the base, the two filling grooves are communicated with the sensitive element groove, and the left end and the right end of the strip-shaped thin groove penetrate through. The fiber grating sensor packaged by the low-temperature glass powder adopts the base and the low-temperature glass powder to package the fiber grating sensor, can be stably used in a severe environment for a long time, and can have more flexible mounting modes, thereby reducing the measurement error caused by packaging.
Description
Technical field
The present invention relates to the encapsulation of fiber-optic grating sensor, is a kind of fiber-optic grating sensor that adopts the cryogenic glass powder encapsulation specifically.
Background technology
Growing along with the fiber grating communication technology, the fiber-optic grating sensor technology is also increasingly mature.Fiber grating is a photosensitivity of utilizing fiber optic materials; In fiber core, form the space phase grating; When multi-wavelength signals went into to inject grating, certain wavelength signals (Bragg wavelength) that satisfies the grating radiation condition can be coupled into backward wave and along original Optical Fiber Transmission route reverse transfer.Fiber-optic grating sensor is compared with the ordinary optic fibre sensor; The fiber-optic grating sensor signal directly is modulated to optical wavelength; Have and not influenced by light intensity intensity fluctuation, junction loss and bending loss of optical fiber etc.; Stability is good, the measuring accuracy advantages of higher, so the fiber-optic grating sensor technology has wide application prospect.
In practical application; In order to protect fragile fiber-optic grating sensor (fiber Bragg grating strain sensor); When installing and using at the scene; Generally adopt bonding mode that fiber-optic grating sensor is directly encapsulated with special resin glue and be fixed on stress body surface to be measured, this packaged type has two very outstanding defectives:
At first, resin glue belongs to organism, is prone to aging the decomposition, so adopt under rugged surroundings, using that the fiber-optic grating sensor of resin glue encapsulation can not be for a long time stable;
Secondly, resin glue can produce redundant in the process of measuring, thereby influences the linearity and the repeatability that fiber-optic grating sensor is measured.
Summary of the invention
To the defective that exists in the prior art; The object of the present invention is to provide a kind of fiber-optic grating sensor that adopts the cryogenic glass powder encapsulation, solve fiber-optic grating sensor because the technical matters that long-time stability difference that the encapsulation of employing resin glue is brought and measuring accuracy are influenced by potting resin glue.
For reaching above purpose, the technical scheme that the present invention takes is:
A kind of fiber-optic grating sensor that adopts the cryogenic glass powder encapsulation is characterized in that, comprising:
Be used to place and encapsulate the sensitive element of fixed fiber grating sensor and the pedestal 4 of optical fiber, pedestal 4 materials are titanium alloy,
Pedestal 4 upper surfaces be provided with between two parties one be used to place the sensitive element of fiber-optic grating sensor sensitive element groove 2,
The thin groove 3 of bar shaped that is used to place the optical fiber that is connected the sensitive element two ends is arranged on pedestal 4 upper surfaces between two parties, and two filling slots 1 and sensitive element groove 2 are communicated with, and thin groove 3 right ends of bar shaped connect the left and right side of pedestal 4.
On the basis of technique scheme, greater than sensitive element size 1mm, the sensitive element groove is deep to few 5mm to the sensitive element groove size at least.
On the basis of technique scheme, when adopting the rectangle filling slot, filling slot is of a size of 7mm * 7mm * 6mm, when adopting cylindrical filling slot, and the groove depth 6mm of filling slot, cylindrical groove horizontal section diameter is 7mm.
On the basis of technique scheme, the thin groove of bar shaped from the axis of symmetry of pedestal run through pedestal about, filling slot is connected with the sensitive element groove.
On the basis of technique scheme, thin groove 3 degree of depth of bar shaped are 5mm, and width is 3mm.
On the basis of technique scheme, the softening temperature of said cryogenic glass powder is 320～340 ℃, and sintering temperature is 360～380 ℃.
The fiber-optic grating sensor of employing cryogenic glass powder encapsulation of the present invention; Adopt pedestal to add cryogenic glass powder packaged fiber grating sensor; Can be steady in a long-term in rugged environment, use can have more mounting means flexibly, thereby reduces because encapsulation institute errors caused.
Description of drawings
The present invention has following accompanying drawing:
Fig. 1 adopts the structural representation of the fiber-optic grating sensor of cryogenic glass powder encapsulation,
Fig. 2 packaging area schematic top plan view.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
Like Fig. 1, shown in 2, the fiber-optic grating sensor of employing cryogenic glass powder encapsulation of the present invention comprises:
Pedestal 4, pedestal 4 materials are titanium alloy, its size can be 60mm * 15mm * 8mm; Said pedestal is used to place and encapsulate the sensitive element and the optical fiber of fixed fiber grating sensor; Sensitive element and optical fiber to fiber-optic grating sensor play the mechanical protection effect, avoid the sensitive element of fiber-optic grating sensor and optical fiber to receive outside destroy, and this outer frame is passed to sensitive element from stress body surface to be measured with strain and measures; The sensitive element of said fiber-optic grating sensor is a Bragg grating
Pedestal 4 upper surfaces are provided with a sensitive element groove 2 between two parties, and sensitive element groove 2 is used to place the sensitive element of fiber-optic grating sensor, and the size of sensitive element groove depends on the size of sensitive element; The size of sensitive element groove is more bigger than sensitive element size, smooth being placed in the sensitive element groove of sensitive element ability is got final product, usually; The sensitive element groove size gets final product greater than sensitive element size 1mm at least; Need not excessively, the sensitive element groove is deep to few 5mm
Sensitive element groove 2 a medianly zygomorphic rectangle or the columniform filling slots 1 of being provided with, the shape of filling slot 1 will make things convenient for the processing of pedestal and to the filling of cryogenic glass powder, can select other shape according to the actual requirements; Filling slot and sensitive element groove should can be eliminated the deviation owing to the measurement value sensor that does not produce point-blank point-blank like this, and two filling slots 1 all are used to fill cryogenic glass powder; Said cryogenic glass powder is used for sensitive element and optical fiber are fixed encapsulation; As selecting embodiment, when adopting the rectangle filling slot, filling slot is of a size of 7mm * 7mm * 6mm; When adopting cylindrical filling slot; The groove depth 6mm of filling slot, cylindrical groove horizontal section diameter is 7mm
The distance from bottom pedestal 4 bottom surfaces 1.8～2.5mm of filling slot 1; If groove is crossed the transmission effect on pedestal that far will influence stress from base bottom; If but groove too closely can increase the difficulty of processing of pedestal again from base bottom; Just select 1.8～2.5mm so take all factors into consideration, be preferably 2mm.
The thin groove 3 of bar shaped is arranged on pedestal 4 upper surfaces between two parties; Two filling slots 1 and sensitive element groove 2 are communicated with; Thin groove 3 right ends of bar shaped connect the left and right side of pedestal 4, and the thin groove 3 of bar shaped is used to place the optical fiber that is connected the sensitive element two ends, and said optical fiber is used for transmitting optical signal.Thin groove requires the following optical fiber that can place, and stock size requires to the degree of depth is 5mm, and width is that 3mm gets final product, and the thin groove of bar shaped from the axis of symmetry of pedestal run through pedestal about, filling slot is connected with the sensitive element groove.
The fiber-optic grating sensor encapsulation process of employing cryogenic glass powder encapsulation of the present invention is following: with the sensitive element of fiber-optic grating sensor (is Bragg grating; For example: can be the high temperature resistant type Bragg grating, can anti-450 ℃ of left and right sides high temperature) and the optical fiber that links to each other with sensitive element put into pedestal 4, wherein sensitive element is put into sensitive element groove 2; Optical fiber then tiles in the thin groove 3 of bar shaped; Then, in filling slot 1, fill cryogenic glass powder, cryogenic glass powder is heated through heat gun or electric soldering iron; Make its fusion; The optical fiber that cryogenic glass powder after the fusion will link to each other with sensitive element is fixed in the thin groove 3 of bar shaped, so just makes sensitive element be fixed in the sensitive element groove 2, has accomplished that promptly the overall optical fiber grating sensor is fixed in the pedestal.
The present invention adopts cryogenic glass powder to replace resin glue and encapsulates; Not only on the stability of sensor integral body, raising has been arranged; And raising is also arranged on the order of accuarcy of sensor, this is owing to the stability of being passed through the glass products that obtains after fusing is solidified by cryogenic glass powder will be far longer than resin glue, and this product is because the principal ingredient of principal ingredient and optical fiber is consistent; So can not play interference effect, and then can ensure the transmission of light signal to the transmission of light.The softening temperature of said cryogenic glass powder is 320～340 ℃, and sintering temperature is 360～380 ℃.
Improve on the measuring accuracy of the fiber-optic grating sensor that adopts packaged type according to the invention with respect to the sensor that adopted resin glue water seal dress in the past; Improve and be apparent that the working time most; Adopt the fiber Bragg grating strain sensor of this packaged type can steady operation more than 3 years; Very simple installed and used also at the scene, only needs with electric welding machine the pedestal of sensor to be welded on tested steel structure surface and gets final product.
Claims (6)
1. a fiber-optic grating sensor that adopts the cryogenic glass powder encapsulation is characterized in that, comprising:
Be used to place and encapsulate the sensitive element of fixed fiber grating sensor and the pedestal of optical fiber (4), pedestal (4) material is a titanium alloy,
Pedestal (4) upper surface be provided with between two parties one be used to place the sensitive element of fiber-optic grating sensor sensitive element groove (2),
A medianly zygomorphic rectangle or the columniform filling slot (1) of being provided with of sensitive element groove (2), two filling slots (1) all are used to fill cryogenic glass powder, distance from bottom pedestal (4) bottom surface 1.8～2.5mm of filling slot (1),
The thin groove of bar shaped (3) that is used to place the optical fiber that is connected the sensitive element two ends is arranged on pedestal (4) upper surface between two parties, and two filling slots (1) and sensitive element groove (2) are communicated with, and the thin groove of bar shaped (3) right ends connects the left and right side of pedestal (4).
2. the fiber-optic grating sensor of employing cryogenic glass powder encapsulation as claimed in claim 1, it is characterized in that: greater than sensitive element size 1mm, the sensitive element groove is deep to few 5mm to the sensitive element groove size at least.
3. the fiber-optic grating sensor of employing cryogenic glass powder encapsulation as claimed in claim 1; It is characterized in that: when adopting the rectangle filling slot, filling slot is of a size of 7mm * 7mm * 6mm, when adopting cylindrical filling slot; The groove depth 6mm of filling slot, cylindrical groove horizontal section diameter is 7mm.
4. the fiber-optic grating sensor of employing cryogenic glass powder as claimed in claim 1 encapsulation is characterized in that: the thin groove of bar shaped from the axis of symmetry of pedestal run through pedestal about, filling slot is connected with the sensitive element groove.
5. the fiber-optic grating sensor of employing cryogenic glass powder encapsulation as claimed in claim 1, it is characterized in that: the thin groove of bar shaped (3) degree of depth is 5mm, and width is 3mm.
6. the fiber-optic grating sensor of employing cryogenic glass powder encapsulation as claimed in claim 1, it is characterized in that: the softening temperature of said cryogenic glass powder is 320～340 ℃, sintering temperature is 360～380 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105340834A CN102466492A (en) | 2010-11-08 | 2010-11-08 | Fiber grating sensor packaged by low-temperature glass powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105340834A CN102466492A (en) | 2010-11-08 | 2010-11-08 | Fiber grating sensor packaged by low-temperature glass powder |
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| Publication Number | Publication Date |
|---|---|
| CN102466492A true CN102466492A (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105340834A Pending CN102466492A (en) | 2010-11-08 | 2010-11-08 | Fiber grating sensor packaged by low-temperature glass powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235359A (en) * | 2012-07-26 | 2013-08-07 | 上海拜安实业有限公司 | Single-mode fiber connector wire on basis of adhesive-free vitrification technology, related nanometer-sized silicon dioxide and manufacturing method |
| CN104129041A (en) * | 2014-08-07 | 2014-11-05 | 中国工程物理研究院总体工程研究所 | Packaging mould for photonic crystal fiber sensing unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196491A (en) * | 1996-06-13 | 1998-10-21 | 康宁股份有限公司 | Optical device and fusion seal |
| US6122430A (en) * | 1996-06-13 | 2000-09-19 | Corning Incorporated | Optical device and fusion seal |
| CN1334929A (en) * | 1998-12-04 | 2002-02-06 | 塞德拉公司 | Tube-encased fibre grating |
| US6477299B1 (en) * | 1999-04-23 | 2002-11-05 | Corning Incorporated | Environmentally stable athermalizes optical fiber grating device and method of making a stabilized device |
| CN1409140A (en) * | 2001-09-25 | 2003-04-09 | 住友电气工业株式会社 | Method and device for heating welding parts of thermal optical fiber and optical fiber array |
-
2010
- 2010-11-08 CN CN2010105340834A patent/CN102466492A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1196491A (en) * | 1996-06-13 | 1998-10-21 | 康宁股份有限公司 | Optical device and fusion seal |
| US6122430A (en) * | 1996-06-13 | 2000-09-19 | Corning Incorporated | Optical device and fusion seal |
| CN1334929A (en) * | 1998-12-04 | 2002-02-06 | 塞德拉公司 | Tube-encased fibre grating |
| US6477299B1 (en) * | 1999-04-23 | 2002-11-05 | Corning Incorporated | Environmentally stable athermalizes optical fiber grating device and method of making a stabilized device |
| CN1409140A (en) * | 2001-09-25 | 2003-04-09 | 住友电气工业株式会社 | Method and device for heating welding parts of thermal optical fiber and optical fiber array |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235359A (en) * | 2012-07-26 | 2013-08-07 | 上海拜安实业有限公司 | Single-mode fiber connector wire on basis of adhesive-free vitrification technology, related nanometer-sized silicon dioxide and manufacturing method |
| CN104129041A (en) * | 2014-08-07 | 2014-11-05 | 中国工程物理研究院总体工程研究所 | Packaging mould for photonic crystal fiber sensing unit |
| CN104129041B (en) * | 2014-08-07 | 2017-01-18 | 中国工程物理研究院总体工程研究所 | Packaging mould for photonic crystal fiber sensing unit |
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Application publication date: 20120523 |