CN2570733Y - Optical fibre strain transducer - Google Patents
Optical fibre strain transducer Download PDFInfo
- Publication number
- CN2570733Y CN2570733Y CN 02260596 CN02260596U CN2570733Y CN 2570733 Y CN2570733 Y CN 2570733Y CN 02260596 CN02260596 CN 02260596 CN 02260596 U CN02260596 U CN 02260596U CN 2570733 Y CN2570733 Y CN 2570733Y
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- optical fiber
- groove
- fiber
- bridge shape
- aluminium sheet
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model relates to a novel optical fiber strain transducer. A bridge-shaped aluminium plate is hollowed with a groove, and measurement optical fiber stuck in the groove is covered by a cover to form an optical fiber box. Two end diagonal lines of the rectangular bridge-shaped aluminium plate are respectively provided with tapered pins and screws for tightly fixing the optical fiber box and an object needing to be measured. Temperature compensation optical fiber is arranged besides the groove of the bridge-shaped aluminium plate, the measurement optical fiber in the groove is connected with a 3 * 3 optical fiber coupler, and three optical fiber of coupled optical fiber are respectively connected with a light-sensitive tube. The transducer can prevent water, dampness and electromagnetic interference. Since the wavelength of light waves is used for measuring the deformation of the object, the measuring sensitivity of the utility model is higher than that of a traditional resistor type strain instrument, and measurement range can reach 1000 micro strain. Measurement precision is high due to the temperature compensation optical fiber arranged besides the measurement optical fiber.
Description
Technical field
The utility model relates to a kind of Fibre Optical Sensor of measuring works deformation such as bridge, buildings.
Background technology
The deformation of Measuring Object before this generally is to use resistance strain type sensor, continues to use for six more than ten years, becomes most widely used sensor on the Structural Engineering, in whole world sensor total amount, has accounted for 60% share; But this sensor weakness is a lot, mainly is in the environment that makes moist, and its strain measurement value error is very big, can't operate as normal, and,, will cover its signal reading as equipment works such as electric welding machines in the occasion of strong electromagnetic.
Summary of the invention
The purpose of this utility model provides a kind of novel optical fiber strain and passes sensor, use the semiconductor laser light source, output signal as fibre optic interferometer, when the length variations of optical fiber be Δ=± k λ, k positive integer or 0, λ is the lasing light emitter wavelength, photosensitive tube at the interferometer output terminal is the brightest, then can measure the number that elongates or shortens of testee, and when Δ=± (2k λ+1) λ/2, photosensitive tube is the darkest, the brightest and the darkest intermediate luminance, change continuously with Δ, but can't distinguish optical fiber is to elongate or shorten, utilize the relation of three-phase alternating current and rotating magnetic field, 120 ° of every phase phase differential, if require to change the rotating magnetic field direction of motor, as ABC three-phase phase-sequence (being that ABC three-phase coil electric current reaches maximal value successively), change into the ACB three-phase phase-sequence, then the rotating magnetic field direction is changed into reverse direction, thus, the output terminal of interferometer is connected with 3 * 3 fiber couplers, promptly from an output point, be divided into three output points, and connect three photosensitive tubes respectively, if elongate optical fiber is bright successively from the ABC phase sequence, secretly, then rightabout bright successively dark, it is the shortening of optical fiber, and how optical fiber is installed on testee, its measurement effect is best, it also is main summary of the invention of the present utility model, for this reason, the utility model is on the aluminium sheet of a bridge shape, the hollow out groove, with measuring optical fiber or grating, adhere in the groove, cover with case, constitute fiber termination box, bridge shape aluminium sheet is rectangle, diagonal line place at two ends, use tapered dowel and screw that fiber termination box and testee is fastening respectively, perhaps, the bridge shape aluminium sheet of fiber termination box, can be welded on the object being measured by another A3 shaped steel plate, the bridge shape aluminium sheet two ends of fiber termination box use tapered dowel and screw and A3 plate fastening respectively, and another root temperature compensation optical fiber is placed on bridge shape aluminum plate groove next door, measuring optical fiber in the groove is connected with 3 * 3 fiber couplers, and three optical fiber of coupled fiber connect a photosensitive tube respectively; This sensor is not water funk, be not afraid of humidity, be not afraid of electromagnetic interference (EMI), because it is the deformation with the optical wavelength Measuring Object, so measure sensitivity far above traditional resistance-type strainmeter, its measurement range can reach 10000 microstrains (1 microstrain i.e. 1 meter long fiber lengths changes 1 micron relative length variation), owing to used temperature compensation optical fiber to be placed on the measuring optical fiber next door,, then can from the dependent variable of compensated optical fiber, reduce if Yin Wendu just makes elongate optical fiber or shortening.
Description of drawings
Accompanying drawing 1 is that the utility model is installed in the synoptic diagram on the testee.
Accompanying drawing 2 is synoptic diagram that cementation has optical fiber in the groove on bridge shape aluminium sheet.
Accompanying drawing 3 is the utility model and the fixing partial sectional view of testee.
Accompanying drawing 4 is to be welded on synoptic diagram on the testee by the A3 plate.
Embodiment
See also accompanying drawing 1, shown in 2, on the aluminium sheet 1 of a bridge shape, hollow out groove 2, with measuring optical fiber 4, adhere to groove interior 2, cover with case 3, become the structure fiber termination box, bridge shape aluminium sheet 1 is rectangle, the diagonal line place at two ends, use tapered dowel 6 and screw 5 fastening respectively with testee 8, perhaps, the bridge shape aluminium sheet of fiber termination box can be welded on the object being measured by another A3 aluminium sheet, the bridge shape aluminium sheet two ends of fiber termination box use tapered dowel and screw and A3 plate fastening respectively, as shown in Figure 4, on bridge shape aluminum plate groove next door, place another root temperature compensation optical fiber 7, measuring optical fiber in the groove is connected with 3 * 3 fiber couplers, and three optical fiber of coupled fiber connect a photosensitive tube (not shown on accompanying drawing) respectively.
Claims (3)
1, a kind of novel optical fiber strain transducer, it is characterized in that: on the aluminium sheet of a bridge shape, the hollow out groove is with measuring optical fiber, adhere in the groove, cover with case, constitute fiber termination box, bridge shape aluminium sheet is rectangle, diagonal line place at two ends uses tapered dowel and screw that fiber termination box and testee is fastening respectively.
2, by power kind of requirement 1 described novel optical fiber strain transducer, it is characterized in that:, place another root temperature compensation optical fiber on bridge shape aluminum plate groove next door, measuring optical fiber in the groove is connected with 3 * 3 fiber couplers, and three optical fiber of coupled fiber connect a photosensitive tube respectively.
3, by the described novel optical fiber strain transducer of claim 1, it is characterized in that: the bridge shape aluminium sheet of fiber termination box, can be welded on the object being measured by another A3 shaped steel plate, the bridge shape aluminium sheet two ends of fiber termination box use tapered dowel and screw and A3 plate fastening respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02260596 CN2570733Y (en) | 2002-10-10 | 2002-10-10 | Optical fibre strain transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02260596 CN2570733Y (en) | 2002-10-10 | 2002-10-10 | Optical fibre strain transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2570733Y true CN2570733Y (en) | 2003-09-03 |
Family
ID=33727611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02260596 Expired - Lifetime CN2570733Y (en) | 2002-10-10 | 2002-10-10 | Optical fibre strain transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2570733Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006017974A1 (en) * | 2004-08-16 | 2006-02-23 | Beijing Jiarun Fiber Sensing Technology Inc | Fiber greating or fiber strain sensor head and strain measurement system thereof |
| CN100353141C (en) * | 2005-01-26 | 2007-12-05 | 香港理工大学 | Method of measuring length and mass of brad and pile |
| CN100561136C (en) * | 2006-12-31 | 2009-11-18 | 中国科学院半导体研究所 | A kind of optical fibre strain disk and preparation method thereof |
| WO2010009671A1 (en) * | 2008-07-22 | 2010-01-28 | The Hong Kong Polytechnic University | Temperature-compensated fibre optic strain gauge |
| CN1910436B (en) * | 2004-01-23 | 2010-05-26 | Lm玻璃纤维有限公司 | Device including a system adapted for use in temperature compensation of strain measurements in fibre-reinforced structures |
| CN101900533A (en) * | 2010-07-23 | 2010-12-01 | 水利部交通运输部国家能源局南京水利科学研究院 | Optical fiber grating measurement method for monitoring embankment section settlement |
| CN103278101A (en) * | 2013-05-02 | 2013-09-04 | 中国船舶重工集团公司第七○二研究所 | Integrated strain measurement device based on optical fiber grating strain sensor |
| CN103822591A (en) * | 2014-02-28 | 2014-05-28 | 宁波杉工仪器设备有限公司 | Small substrate type fiber Bragg grating strain transducer |
| 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 |
| CN105572054A (en) * | 2016-03-03 | 2016-05-11 | 中国计量学院 | Optical fiber hydrogen sensor with temperature compensation function |
| CN110057309A (en) * | 2019-05-21 | 2019-07-26 | 衢州学院 | A kind of fiber Bragg grating strain sensor and its installing/dismounting method suitable for various working |
-
2002
- 2002-10-10 CN CN 02260596 patent/CN2570733Y/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1910436B (en) * | 2004-01-23 | 2010-05-26 | Lm玻璃纤维有限公司 | Device including a system adapted for use in temperature compensation of strain measurements in fibre-reinforced structures |
| WO2006017974A1 (en) * | 2004-08-16 | 2006-02-23 | Beijing Jiarun Fiber Sensing Technology Inc | Fiber greating or fiber strain sensor head and strain measurement system thereof |
| CN100353141C (en) * | 2005-01-26 | 2007-12-05 | 香港理工大学 | Method of measuring length and mass of brad and pile |
| CN100561136C (en) * | 2006-12-31 | 2009-11-18 | 中国科学院半导体研究所 | A kind of optical fibre strain disk and preparation method thereof |
| WO2010009671A1 (en) * | 2008-07-22 | 2010-01-28 | The Hong Kong Polytechnic University | Temperature-compensated fibre optic strain gauge |
| CN101900533A (en) * | 2010-07-23 | 2010-12-01 | 水利部交通运输部国家能源局南京水利科学研究院 | Optical fiber grating measurement method for monitoring embankment section settlement |
| CN103278101A (en) * | 2013-05-02 | 2013-09-04 | 中国船舶重工集团公司第七○二研究所 | Integrated strain measurement device based on optical fiber grating strain sensor |
| CN103822591A (en) * | 2014-02-28 | 2014-05-28 | 宁波杉工仪器设备有限公司 | Small substrate type fiber Bragg grating strain transducer |
| 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 |
| CN105572054A (en) * | 2016-03-03 | 2016-05-11 | 中国计量学院 | Optical fiber hydrogen sensor with temperature compensation function |
| CN110057309A (en) * | 2019-05-21 | 2019-07-26 | 衢州学院 | A kind of fiber Bragg grating strain sensor and its installing/dismounting method suitable for various working |
| 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 |
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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 |
Free format text: FORMER OWNER: CAI BIN CHEN QIANMEI Effective date: 20040305 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20040305 Address after: 210 room 65, 200092 Chifeng Road, Shanghai Patentee after: Zhang Jichang Address before: 210 room 65, 200092 Chifeng Road, Shanghai Co-patentee before: Cai Bin Patentee before: Zhang Jichang Co-patentee before: Chen Qianmei |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121010 Granted publication date: 20030903 |