CN2720406Y - Optical-fiber grating or optical strain transducing head and strain measuring system - Google Patents
Optical-fiber grating or optical strain transducing head and strain measuring system Download PDFInfo
- Publication number
- CN2720406Y CN2720406Y CN 200420009255 CN200420009255U CN2720406Y CN 2720406 Y CN2720406 Y CN 2720406Y CN 200420009255 CN200420009255 CN 200420009255 CN 200420009255 U CN200420009255 U CN 200420009255U CN 2720406 Y CN2720406 Y CN 2720406Y
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- China
- Prior art keywords
- fiber
- sensing head
- fiber grating
- strain
- folding part
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 33
- 230000002463 transducing effect Effects 0.000 title abstract 3
- 230000003287 optical effect Effects 0.000 title abstract 2
- 238000009434 installation Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 69
- 238000005259 measurement Methods 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012938 design process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 239000007767 bonding agent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/08—Testing mechanical properties
- G01M11/083—Testing mechanical properties by using an optical fiber in contact with the device under test [DUT]
- G01M11/085—Testing mechanical properties by using an optical fiber in contact with the device under test [DUT] the optical fiber being on or near the surface of the DUT
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
- G01D5/35309—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
- G01D5/35316—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a Bragg gratings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
The utility model relates to an optical fiber grating or optical strain transducing head which has the advantages of reasonable structure and convenient installation and is suitable for various complex constructional engineering strain monitoring. The utility model comprises a bracket, and optical fibre or optical fibre grating. The utility model is characterized in that the bracket has a bend-shaped structure with a transverse folding part and a vertical folding part. The optical fiber grating or the optical fiber is bonded on the external surface or the internal surface of the vertical folding part. The utility model also provides a strain measuring system which comprises the optical fiber strain transducing head.
Description
Technical field
The utility model relates to field of sensing technologies, particularly a kind of fiber grating or fiber strain sensing head, and a kind of strain measurement system that comprises this fiber grating or fiber strain sensing head.
Background technology
Traditional strainmeter mainly is based on piezoelectricity or resistance-type, and principles such as vibration are subjected to electromagnetic interference (EMI) easily, and has more serious drift, is difficult for realizing distributed measurement.In recent years, optical fiber sensor in other words fibre optic strain sensor obtained bigger development.Optical fiber sensor has the following advantages: avoid electromagnetic interference (EMI) 1.; 2. structure is little, easily imbeds in the testee; 3. good stability.Therefore in the application of Structural Engineering, it is the trend of technical development that optical fiber sensor replaces traditional resistance strain type sensor.But, optical fiber sensor of the prior art is strain measurement system in other words, because the restriction of the project organization of its fiber strain sensing head, for example SMD fiber strain sensing is first-class, exists the technological deficiency that inconvenience is installed in the actual use of some complicated occasion.Comprise upper and lower strut rail as fiber strain sensing of the prior art is first, the centre is the support of reflection stress deformation, and the sensitive part of support is pasted with optical fiber.
The utility model content
The utility model provides a kind of project organization reasonable at the above-mentioned defective that exists in the prior art, is convenient to install, and can be applicable to the fiber grating or the fiber strain sensing head of multiple labyrinth engineering strain monitoring.The utility model also provides a kind of strain measurement system that comprises this fiber grating or fiber strain sensing head.
The technical solution of the utility model is as follows:
Fiber grating or fiber strain sensing head, comprise support, and optical fiber or fiber grating, it is characterized in that: described support is the bending shape structure that has cross break portion and perpendicular folding part, described fiber grating or optical fiber stick on the outside surface of described perpendicular folding part or on the inside surface.
The end of described support is provided with strut rail.
Described strut rail is provided with the installation screw.
Described bending shape structure is convex, and promptly have one and go up the following cross break of cross break portion and portion, and the perpendicular folding part along these two cross break portions of company.
Describedly go up cross break portion and following cross break portion all is basically parallel to described strut rail, described perpendicular folding part is basically perpendicular to described cross break portion.
Set up housing on the described support.
A kind of strain measurement system comprises sensing head, it is characterized in that: described sensing head is above-mentioned fiber grating or fiber strain sensing head.
Technique effect of the present utility model is as follows:
Because the utility model fiber grating or fiber strain sensing head, by on the perpendicular folding part outside surface that optical fiber or fiber grating is sticked on this support or on the inside surface of perpendicular folding part, help truly reflecting the force-bearing situation or the corresponding strain displacement amount of engineering structure or testee, thereby realize accurately measuring or precisely monitoring.
Because bending shape structure is convex, promptly have one and go up the following cross break of cross break portion and portion, and perpendicular folding part along these two cross break portions of company, like this, optical fiber or fiber grating are sticked on the inside surface or the outside surface of this perpendicular folding part, simple and convenient, and this convex shape is convenient to the design of strain model.
Because last cross break portion and following cross break portion all are basically parallel to strut rail, perpendicular folding part is basically perpendicular to cross break portion, help design and batch process like this, thereby it is reliable and stable to ensure the quality of products.
Because strut rail is provided with the installation screw, so both the two ends strut rail can be welded on the surface of steel construction, also can be installed in steel construction or concrete surface with screw by the mounting hole on the horizontal end.
Because a kind of strain measurement system of the utility model has adopted above-mentioned fiber grating or fiber strain sensing head, this just makes this strain measurement system can obtain corresponding above-mentioned beneficial technical effects too.
Description of drawings
Fig. 1 is the structural representation of the utility model fiber grating or fiber strain sensing head;
Fig. 2 is the structural representation of fiber grating or second kind of embodiment of fiber strain sensing head;
Fig. 3 is the structural representation of fiber grating or the third embodiment of fiber strain sensing head;
Fig. 4 is the structural representation of fiber grating or the 4th kind of embodiment of fiber strain sensing head;
Fig. 5 is the structural representation of fiber grating or the 5th kind of embodiment of fiber strain sensing head.
Mark lists as follows among the figure:
The 1-support; 2-optical fiber; The last strut rail of 3-; Strut rail under the 4-; 5-installs screw; 6-bending shape structure; The last cross break of 7-portion; Cross break portion under the 8-; 9-erects the folding part; The 10-housing; The perpendicular folding part of 11-outside surface; The perpendicular folding part of 12-inside surface; 13-optical fiber or fiber grating.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Technical conceive of the present utility model is to provide a kind of sensing head that utilizes optical fiber or fiber grating to carry out strain sensing, and it is as follows that this sensing head has characteristics basically: 1. a convex support is arranged, and the one side of support is pasted optical fiber or fiber grating.2. the two ends of support can be installed or be welded on the testee with variations such as monitor stress, displacements.3. a shell is in order to protection and guide the slide bar at two ends.
In general, the working method of this sensing head is as follows:
Optical fiber or fiber grating stick at the position of the center projections of convex support, two ends are fixed on the testee, the purpose of the strut rail at the two ends of sensing head is when sensing head is imbedded in the buildings of concrete or other form, after object has certain distortion for a certain reason, the pulling strut rail, thereby make sensing head cause variant, also the two ends strut rail can be welded on the surface of steel construction, or be installed in steel construction or concrete surface with screw by the mounting hole on the horizontal end.After optical fiber or fiber grating were pulled to, the wavelength of its reflection also along with doing corresponding the variation, can be known the corresponding dependent variable or the displacement of testee by inference by the variation of monitoring reflection wavelength.
As shown in Figure 1, the utility model fiber strain sensing head, comprise strut rail 3, following strut rail 4 and the support 1 between these two strut rails, and optical fiber 13, support 1 is bending shape structure 6, optical fiber 13 sticks on the perpendicular folding part inside surface 12 of this bending shape structure 6, obviously also can stick on the perpendicular folding part outside surface 11.Because the utility model fiber strain sensing head, the situation of having got rid of its stressed unstability because of bending shape structure occurs, by on the perpendicular folding part outside surface that fiber grating or optical fiber is sticked on this bending shape structure or on the inside surface of perpendicular folding part, help truly reflecting the force-bearing situation or the corresponding strain displacement amount of engineering structure or testee, thereby realize accurately measuring or precisely monitoring.In addition, be equipped with housing 10 in the outer periphery of support 1, this housing 10 shields.
As shown in Figure 2, Fig. 2 shows the relation of optical fiber 13 and strainometer sensing head main body, and fiber grating or optical fiber can stick on perpendicular folding part inside surface 12, also can stick on perpendicular folding part outside surface 11.Fiber grating or optical fiber are bonded at the surface of sensing head by bonding agent.When the two ends of sensing head are subjected to pulling force when distortion, can cause the optical fiber or the fiber grating distortion of being pasted, the wavelength change of detection optical fiber or fiber grating just can be known the size of deflection.
As shown in Figure 3, Fig. 3 shows the shape structure of sensing head main body, comprise strut rail 3, following strut rail 4 and the support 1 between these two strut rails, support 1 is bending shape structure 6, is convex, promptly have one and go up the following cross break of cross break portion 7 and portion 8, and one along the perpendicular folding part 9 that connects these two cross break portions, like this, fiber grating or optical fiber is sticked on the surface of this perpendicular folding part 9, simple and convenient, and this convex shape is convenient to the design of strain model.Last cross break portion and following cross break portion all are basically parallel to strut rail, and perpendicular folding part is basically perpendicular to cross break portion, help design and batch process like this, thereby it is reliable and stable to ensure the quality of products.
As shown in Figure 4, the purpose of sensing head two ends strut rail is when sensing head is imbedded in the buildings of concrete or other form, after object has certain distortion for a certain reason, the pulling strut rail, thereby make sensing head cause variant, also the two ends strut rail can be welded on the surface of steel construction, or be installed in steel construction or concrete surface with screw by the mounting hole on the strut rail.Fig. 4 shows a mutation of sensing head, only has a cross break portion and a perpendicular folding part.
Fig. 5 shows a mutation of sensing head, at eel-like figure of two ends bar place design, becomes a deformed region.Regulate the size of H, L, m, a, can change the ratio of induction grating with the testee distortion.Certainly,, regulate the size of H, L, m, a, can change the ratio of induction grating too, help accurate measurement with the testee distortion for other illustrated fiber gratings or fiber strain sensing head.
For a kind of strain measurement system of the utility model, adopted above-mentioned fiber grating or fiber strain sensing head, this just makes this strain measurement system can obtain corresponding above-mentioned beneficial technical effects too.From embodiment, other aspects do not have the variation on the generation technique.
The above only is a preferred implementation of the present utility model.Should be pointed out that for a person skilled in the art, according to the same principle of invention of the utility model, can also make many modification and improvement, but these all fall into protection domain of the present utility model.
Claims (7)
1. fiber grating or fiber strain sensing head, comprise support, and optical fiber or fiber grating, it is characterized in that: described support is the bending shape structure that has cross break portion and perpendicular folding part, described fiber grating or optical fiber stick on the outside surface of described perpendicular folding part or on the inside surface.
2. fiber grating according to claim 1 or fiber strain sensing head is characterized in that: the end of described support is provided with strut rail.
3. fiber grating according to claim 2 or fiber strain sensing head is characterized in that: described strut rail is provided with the installation screw.
4. fiber grating according to claim 3 or fiber strain sensing head is characterized in that: described bending shape structure is convex, and promptly have one and go up the following cross break of cross break portion and portion, and the perpendicular folding part along these two cross break portions of company.
5. fiber grating according to claim 4 or fiber strain sensing head is characterized in that: describedly go up cross break portion and following cross break portion all is basically parallel to described strut rail, described perpendicular folding part is basically perpendicular to described cross break portion.
6. fiber grating according to claim 5 or fiber strain sensing head is characterized in that: set up housing on the described support.
7. a strain measurement system comprises sensing head, it is characterized in that: described sensing head is described fiber grating of one of claim 1-6 or fiber strain sensing head.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420009255 CN2720406Y (en) | 2004-08-16 | 2004-08-16 | Optical-fiber grating or optical strain transducing head and strain measuring system |
| PCT/CN2005/001106 WO2006017974A1 (en) | 2004-08-16 | 2005-07-22 | Fiber greating or fiber strain sensor head and strain measurement system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420009255 CN2720406Y (en) | 2004-08-16 | 2004-08-16 | Optical-fiber grating or optical strain transducing head and strain measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2720406Y true CN2720406Y (en) | 2005-08-24 |
Family
ID=35009365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420009255 Expired - Lifetime CN2720406Y (en) | 2004-08-16 | 2004-08-16 | Optical-fiber grating or optical strain transducing head and strain measuring system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN2720406Y (en) |
| WO (1) | WO2006017974A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314936A (en) * | 2014-09-02 | 2015-01-28 | 广州大学 | Fiber bragg grating sensor rapid sticking machine for detecting strain of horizontal axis or beam |
| CN104677302A (en) * | 2015-03-24 | 2015-06-03 | 北京航空航天大学 | Three-dimensional sensor based on fiber bragg grating and sensor main body of three-dimensional sensor |
| CN106017541A (en) * | 2016-07-29 | 2016-10-12 | 中铁第四勘察设计院集团有限公司 | Online monitoring device and method of subway contact net support looseness |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449369A (en) * | 2017-09-15 | 2017-12-08 | 浙江智远光电科技有限公司 | Easy fiber grating energy storage welded type foil gauge is installed |
| CN110057309B (en) * | 2019-05-21 | 2024-02-09 | 衢州学院 | Method for installing and detaching fiber bragg grating strain sensor applicable to various working conditions |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5729335A (en) * | 1996-08-23 | 1998-03-17 | Mcdonnell Douglas Corporation | Optical fiber monitoring apparatus and an associated method for monitoring bending or strain on an optical fiber during installation |
| JP2002286563A (en) * | 2001-03-28 | 2002-10-03 | Kyowa Electron Instr Co Ltd | Optical fiber type strain gage |
| CN2513078Y (en) * | 2001-12-07 | 2002-09-25 | 陈伟民 | Amber strain measurer by optic fibre method |
| CN2570733Y (en) * | 2002-10-10 | 2003-09-03 | 张继昌 | Optical fibre strain transducer |
| CN2646668Y (en) * | 2003-09-05 | 2004-10-06 | 刘育梁 | Repeatedly-usable optical fiber grating strain transducer |
| CN2651704Y (en) * | 2003-11-04 | 2004-10-27 | 刘育梁 | Fibre-optic raster strain sensor |
-
2004
- 2004-08-16 CN CN 200420009255 patent/CN2720406Y/en not_active Expired - Lifetime
-
2005
- 2005-07-22 WO PCT/CN2005/001106 patent/WO2006017974A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314936A (en) * | 2014-09-02 | 2015-01-28 | 广州大学 | Fiber bragg grating sensor rapid sticking machine for detecting strain of horizontal axis or beam |
| CN104677302A (en) * | 2015-03-24 | 2015-06-03 | 北京航空航天大学 | Three-dimensional sensor based on fiber bragg grating and sensor main body of three-dimensional sensor |
| CN104677302B (en) * | 2015-03-24 | 2017-11-24 | 北京航空航天大学 | A kind of three-dimension sensor and its sensor main body based on fiber grating |
| CN106017541A (en) * | 2016-07-29 | 2016-10-12 | 中铁第四勘察设计院集团有限公司 | Online monitoring device and method of subway contact net support looseness |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006017974A1 (en) | 2006-02-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GEOKON EQUIPMENT (BEIJING) CO., LTD. Free format text: FORMER OWNER: JIARUNSENSHENG OPTICAL-FIBER SENSING SCIENCE-TECHNOLOGY CO., LTD., BEIJING Effective date: 20070413 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070413 Address after: 102488, 3, Binhe West Street, Triumph Street, Beijing, Fangshan District, Liangxiang Patentee after: Geokon Instruments (Beijing) Co., Ltd. Address before: 100085, room 2, Building 29, Pioneer Park, No. 505, East Road, Beijing, Haidian District Patentee before: Jiarun Sensheng Optical Fiber Sensing Science and Technology Co., Ltd., Beijing |
|
| C56 | Change in the name or address of the patentee |
Owner name: JIKANG INSTRUMENT CO., LTD. Free format text: FORMER NAME: JIKANG INSTRUMENT(BEIJING) CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 102488 Beijing city Fangshan District Liangxiang Kaixuan Street Binhe Street No. 3 Patentee after: CHINA GEOKON INSTRUMENTS CO., LTD. Address before: 102488 Beijing city Fangshan District Liangxiang Kaixuan Street Binhe Street No. 3 Patentee before: Jikang Instrument(Beijing) Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140816 Granted publication date: 20050824 |