CN2550719Y - Optical fiber and grating sheet type package strainometer - Google Patents
Optical fiber and grating sheet type package strainometer Download PDFInfo
- Publication number
- CN2550719Y CN2550719Y CN 02273563 CN02273563U CN2550719Y CN 2550719 Y CN2550719 Y CN 2550719Y CN 02273563 CN02273563 CN 02273563 CN 02273563 U CN02273563 U CN 02273563U CN 2550719 Y CN2550719 Y CN 2550719Y
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- fiber grating
- optical fiber
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- strainometer
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Abstract
The utility model provides an optical fiber grating sheet-type packaged strain gauge, comprising a rectangle metal coupon. The utility model is characterized in that a narrow groove is cut on a longitudinal axis on the rectangle metal coupon, a wide groove is bored at each end, an optical fiber grating is arranged in the narrow groove, adhesive layer for combining the optical fiber grating with the rectangle metal coupon is applied on the surface of the optical fiber grating and the rectangle metal coupon. The utility model has the advantages of simple structure, low cost, ability to produce sheet-type optical fiber grating strain sensor of the same specification, high precision of strain monitoring, easy realization of semi-distribution measurement and temperature compensation due to series connection, and resistance to electromagnetic interference, moisture and corrosion.
Description
(1) technical field
The utility model relates to a kind of intellectual monitoring sensing element.Specifically a kind of optical fiber grating sensing element that is used for the civil engineering work strain monitoring.
(2) background technology
1978, the phenomenon that photon-induced refractive index changes in the Canadian Hill invention germnium doped fiber was come out the in-core grating.1989, the Meltz invention germnium doped fiber grating ultraviolet sidelights on of the U.S. were gone into technology, and people utilize this technology can make the fiber grating of various constants easily, make cost reduce greatly, for its widespread use is laid a good foundation.Because fiber grating has wavelength selectivity, with the fibre system compatibility, insert advantages such as loss is low, simple in structure, volume is little, with low cost, fiber grating all has a wide range of applications in communication and sensory field.The major advantage that fiber grating is used for sensing is embodied in: can avoid the interference of electromagnetic field, electrical insulating property is good; Not influenced by wet environment; Good endurance has opposing and comprises the various rugged surroundings of high temperature (less than 600 ℃) and the ability of chemical erosion, the ability that has the vibration of bearing and impact; Light weight, volume be little, little to structure influence, be easy to arrange; Both point measurement can be realized, also distributed measurement can be realized; Absolute measurement; Save circuit, only just can the transfer structure status signal with single line; But signal, data multipath transmission are convenient to be connected with computing machine, and signal attenuation is little on the unit length; Highly sensitive, the precision height; Bandwidth, signal to noise ratio (S/N ratio) is high.But because bare optical fibers and bare optical gratings is very thin especially, external diameter is about about 125 microns, and its principal ingredient is SiO
2Therefore fragile especially, very poor by other shear resistance, directly it has been run into an installation technics difficult problem as sensing element in engineering reality, can not adapt to the xoncrete structure extensive style mode of production and abominable Service Environment at all, seriously restrict the application of fiber grating in civil engineering work.
(3) summary of the invention
The purpose of this utility model is to provide a kind of fiber grating chip simple in structure, that measure civil engineering structure (as steel construction and reinforced concrete structure) strain precision height, the construction of adaptation civil engineering structure extensive style, good endurance to encapsulate strainometer.The purpose of this utility model is achieved in that it comprises rectangular metal sheet, on the longitudinal axis on the rectangular metal sheet, be carved with stria, the two ends boring has thick groove, be furnished with fiber grating in stria, the surface of fiber grating and rectangular metal sheet scribbles the tackifier with fiber grating and rectangular metal sheet formation one.The utility model can also comprise some architectural features like this: 1, at tail end one section optical fiber that exposes is arranged; 2, the Transmission Fibers that is connected with optical patchcord in the head end setting.The utility model is at the characteristics of civil engineering structure (as steel construction and reinforced concrete structure) extensive style construction, researched and developed the chip method for packing of fiber grating, according to the feature of steel construction and reinforced concrete structure strain, designed the fiber grating chip encapsulation strainometer that is suitable for steel construction or structure of reinforced concrete and service demand.The needs of Temperature Influence and accurate distribution measuring are provided with one section optical fiber that exposes at tail end, so that welding temperature compensated optical fiber grating and cascaded fiber grating sensing element when considering the monitoring of civil engineering structure long-term health.The compensated optical fiber grating places another capillary metal tube, guarantees the influence that it is not subjected to external force.Do not consider the coupling of strain and temperature, sensing characteristics of the present utility model is:
Δ λ/λ=K
εε+K
TIn the Δ T formula, K
εBe the fiber grating strain sensor sensitivity coefficient; K
TBe the fiber grating temperature sensor sensitivity coefficient, they can obtain by rating test.Advantage of the present utility model is: 1, be suitable for industrialization production.Simple in structure, with low cost.Can conveniently make the fiber grating chip encapsulation strainometer of same specification.Only need part to demarcate, just can obtain transduction factor with batch strainometer.2, strain monitoring precision height can reach the precision of 1～3 microstrain.3, can a plurality ofly contact, be easy to realize quasi-distributed measurement and temperature compensation.4, anti-electromagnetic interference (EMI), moisture resistance are wet, corrosion-resistant etc.5, adapt to abominable Construction of Civil Engineering and Service Environment, satisfy the needs of structure durability monitoring.
(4) description of drawings
Accompanying drawing is a structural representation of the present utility model.
(5) specific embodiments
For example the utility model is done more detailed description below in conjunction with accompanying drawing: its structure is formed and is comprised rectangular metal sheet 3, the thickness of rectangular metal sheet is below 0.2mm, to guarantee it and structure cooperative transformation, the distortion situation of reflect structure, the material of rectangular metal sheet can be stainless steel or titanium alloy.Be carved with stria 5 on the longitudinal axis of rectangular metal sheet, stria is a half-arc groove, and the diameter of circular arc is at 0.15-0.25mm, and the two ends boring has thick groove 2, and groove is an arc groove, and the size of groove is about φ 3mm * 5.In stria, be furnished with fiber grating 4, guarantee that fiber grating is in the middle part.The surface of fiber grating and rectangular metal sheet scribbles the tackifier with fiber grating and rectangular metal sheet formation one, and tackifier can be epoxy resin or acrylate (as J133 or J39).At tail end one section optical fiber that exposes 1 is arranged, its length is greater than 5cm.The transmission grids 6 that is connected with optical patchcord in the head end setting.
Claims (3)
1, a kind of fiber grating chip encapsulation strainometer, it is characterized in that: it comprises rectangular metal sheet, on the longitudinal axis on the rectangular metal sheet, be carved with stria, the two ends boring has thick groove, be furnished with fiber grating in stria, the surface of fiber grating and rectangular metal sheet scribbles the tackifier with fiber grating and rectangular metal sheet formation one.
2, fiber grating chip encapsulation strainometer according to claim 1 is characterized in that: at tail end one section optical fiber that exposes is arranged.
3, according to claim 1,2 described fiber grating chip encapsulation strainometers, it is characterized in that: Transmission Fibers is set at head end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02273563 CN2550719Y (en) | 2002-05-30 | 2002-05-30 | Optical fiber and grating sheet type package strainometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02273563 CN2550719Y (en) | 2002-05-30 | 2002-05-30 | Optical fiber and grating sheet type package strainometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2550719Y true CN2550719Y (en) | 2003-05-14 |
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ID=33738008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02273563 Expired - Fee Related CN2550719Y (en) | 2002-05-30 | 2002-05-30 | Optical fiber and grating sheet type package strainometer |
Country Status (1)
| Country | Link |
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| CN (1) | CN2550719Y (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335928C (en) * | 2004-12-17 | 2007-09-05 | 武汉理工大学 | Optical fiber sensitive element metallized packaging structure and its method |
| CN100449261C (en) * | 2007-05-31 | 2009-01-07 | 上海交通大学 | Replaceable embedding type optical fiber strain sensor |
| CN101893492A (en) * | 2010-04-06 | 2010-11-24 | 中国地震局地壳应力研究所 | Mutually-clamped optical fiber grating temperature sensor |
| CN101571380B (en) * | 2009-06-09 | 2011-04-06 | 中国人民解放军海军工程大学 | Wide range fiber grating strain transducer |
| CN102346078A (en) * | 2011-06-15 | 2012-02-08 | 苏州南智传感科技有限公司 | Metal baseband-shaped distributed optical fiber sensor |
| CN102354015A (en) * | 2011-09-08 | 2012-02-15 | 中国科学院半导体研究所 | Manufacturing device for double-cladding fiber grating for high-power fiber laser |
| CN102425994A (en) * | 2011-08-20 | 2012-04-25 | 大连理工大学 | Fiber bragg grating soil mass strain sensor for soil mass encapsulation |
| CN102645176A (en) * | 2012-05-18 | 2012-08-22 | 哈尔滨工业大学 | High-temperature resistant FBG (fiber bragg grating) sheet type strain sensor and manufacturing method thereof |
| CN103604540A (en) * | 2013-11-13 | 2014-02-26 | 中铁四局集团第一工程有限公司 | Photoelectric stressometer |
| CN104279973A (en) * | 2014-09-26 | 2015-01-14 | 北京遥测技术研究所 | Wide-range fiber bragg grating strain sensor |
| CN104330032A (en) * | 2014-07-09 | 2015-02-04 | 国家电网公司 | Fiber displacement sensor, fiber displacement detection device and fiber for sensor |
| CN104101307B (en) * | 2014-07-24 | 2016-08-17 | 河海大学 | A kind of measurement reinforcing bar temperature, fiber grating strain meter of strain simultaneously |
| CN106289091A (en) * | 2016-10-21 | 2017-01-04 | 广东核电合营有限公司 | A kind of lightweight fiber grating wide range strain gauge being applicable to microcrack structure |
| CN106482657A (en) * | 2016-10-10 | 2017-03-08 | 武汉理工大学 | Fiber grating dynamic strain sensor-packaging structure and method |
| CN109579725A (en) * | 2018-12-24 | 2019-04-05 | 南京东智安全科技有限公司 | A kind of long gauge length strain transducer of high-temperature flexible, manufacturing method and application |
-
2002
- 2002-05-30 CN CN 02273563 patent/CN2550719Y/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335928C (en) * | 2004-12-17 | 2007-09-05 | 武汉理工大学 | Optical fiber sensitive element metallized packaging structure and its method |
| CN100449261C (en) * | 2007-05-31 | 2009-01-07 | 上海交通大学 | Replaceable embedding type optical fiber strain sensor |
| CN101571380B (en) * | 2009-06-09 | 2011-04-06 | 中国人民解放军海军工程大学 | Wide range fiber grating strain transducer |
| CN101893492A (en) * | 2010-04-06 | 2010-11-24 | 中国地震局地壳应力研究所 | Mutually-clamped optical fiber grating temperature sensor |
| CN102346078A (en) * | 2011-06-15 | 2012-02-08 | 苏州南智传感科技有限公司 | Metal baseband-shaped distributed optical fiber sensor |
| CN102425994B (en) * | 2011-08-20 | 2013-08-07 | 大连理工大学 | Fiber bragg grating soil mass strain sensor for soil mass encapsulation |
| CN102425994A (en) * | 2011-08-20 | 2012-04-25 | 大连理工大学 | Fiber bragg grating soil mass strain sensor for soil mass encapsulation |
| CN102354015A (en) * | 2011-09-08 | 2012-02-15 | 中国科学院半导体研究所 | Manufacturing device for double-cladding fiber grating for high-power fiber laser |
| CN102645176A (en) * | 2012-05-18 | 2012-08-22 | 哈尔滨工业大学 | High-temperature resistant FBG (fiber bragg grating) sheet type strain sensor and manufacturing method thereof |
| CN103604540A (en) * | 2013-11-13 | 2014-02-26 | 中铁四局集团第一工程有限公司 | Photoelectric stressometer |
| CN103604540B (en) * | 2013-11-13 | 2015-06-10 | 中铁四局集团第一工程有限公司 | Photoelectric stressometer |
| CN104330032A (en) * | 2014-07-09 | 2015-02-04 | 国家电网公司 | Fiber displacement sensor, fiber displacement detection device and fiber for sensor |
| CN104101307B (en) * | 2014-07-24 | 2016-08-17 | 河海大学 | A kind of measurement reinforcing bar temperature, fiber grating strain meter of strain simultaneously |
| CN104279973A (en) * | 2014-09-26 | 2015-01-14 | 北京遥测技术研究所 | Wide-range fiber bragg grating strain sensor |
| CN106482657A (en) * | 2016-10-10 | 2017-03-08 | 武汉理工大学 | Fiber grating dynamic strain sensor-packaging structure and method |
| CN106289091A (en) * | 2016-10-21 | 2017-01-04 | 广东核电合营有限公司 | A kind of lightweight fiber grating wide range strain gauge being applicable to microcrack structure |
| CN109579725A (en) * | 2018-12-24 | 2019-04-05 | 南京东智安全科技有限公司 | A kind of long gauge length strain transducer of high-temperature flexible, manufacturing method and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |