CN103278101A - Integrated strain measurement device based on optical fiber grating strain sensor - Google Patents
Integrated strain measurement device based on optical fiber grating strain sensor Download PDFInfo
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- CN103278101A CN103278101A CN2013101579483A CN201310157948A CN103278101A CN 103278101 A CN103278101 A CN 103278101A CN 2013101579483 A CN2013101579483 A CN 2013101579483A CN 201310157948 A CN201310157948 A CN 201310157948A CN 103278101 A CN103278101 A CN 103278101A
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Abstract
The invention discloses an integrated strain measurement device based on an optical fiber grating strain sensor. The integrated strain measurement device comprises an optical fiber grating strain sensor freely arranged on a metal structure to be measured, wherein a first magnetic ring is fixedly arranged on the metal structure to be measured through magnetic force and encircles the optical fiber grating strain sensor; a fixing ring is provided with an inner positioning ring and an outer positioning ring; the outer positioning ring is fixedly arranged on the first magnetic ring; an optical fiber grating temperature compensation sensor is supported on a supporting plate; the supporting plate is fixedly arranged on the inner positioning ring; therefore, the optical fiber grating strain sensor and the optical fiber grating temperature compensation sensor are positioned in a closed space; a sealing cover is fixedly arranged on the outer positioning ring; a clip-shaped turnup edge at the bottom of the sealing cover is tightly attached to the metal structure to be measured; a second magnetic ring covers the clip-shaped turnup edge of the sealing cover; and a waterproof sealing plate is fixedly connected to the outer positioning ring. The integrated strain measurement device based on the optical fiber grating strain sensor has a temperature compensation function and waterproof sealing property, has improvef the measurement precision, is convenient to mount and dismount and can be reused.
Description
Technical field
The present invention relates to technical field of optical fiber sensing, the strain gauge means based on fiber Bragg grating strain sensor that has temperature compensation function and waterproof sealing performance when being specifically related to be applied in the real-time monitoring structural health conditions of engineering structure.
Background technology
For heavy construction structures such as naval vessel, ocean platform, railway, bridge stay cables, for the accumulated damage of timely recognition structure, thereby the disaster that may occur is given warning in advance, need carry out real-time monitoring structural health conditions.Strain is the important physical of engineering structure, and the individual features that it can reflect structure can be judged the structural damage state, is the of paramount importance parameter of engineering structure health monitoring.In common strain measurement element, but fiber-optic grating sensor with its good linearity kinetic measurement, use Wavelength-encoding can connect, not have plurality of advantages such as electrical resistivity survey survey, no electromagnetic interference (EMI), water-fast anticorrosion, fatigue durability, good stability, be widely used in association areas such as civil engineering work, Marine engineering, become the best core sensing element of heavy construction monitoring structural health conditions field application prospect.The sensing principle of optical fiber grating sensing is to be signal vehicle with the light wave, and adopts wavelength-modulated, and it is not subjected to the influence of light intensity, and signal stabilization utilizes the temperature of fiber grating making and temperature and the strain that strain transducer can be measured structure effectively.Fiber-optic grating sensor is in the long term monitoring process, the measuring point environment temperature changes frequent, for effective monitoring of structures strain regime, must take measures to eliminate the fiber grating centre wavelength drift that temperature variation causes, this just needs to solve the issues of temperature compensation in the fiber-optic grating sensor measuring process, on the other hand, the ocean working environment is very abominable, waterproof, protection against the tide, anticracking, corrosion-resistant requirement to sensor are very high, and this is with regard to the waterproof sealing problem in the long-term measuring process of needs solution fiber-optic grating sensor.At above situation, have in the prior art can temperature compensation fiber-optic grating sensor, but how in the sensor installation process, to solve temperature compensation and waterproof sealing problem simultaneously, remain the technical issues that need to address in its actual use.
Summary of the invention
The applicant improves at above-mentioned shortcoming of the prior art, a kind of integrated strain gauge means based on fiber Bragg grating strain sensor is provided, its feasible strain gauge means based on fiber Bragg grating strain sensor has temperature compensation function and waterproof sealing performance simultaneously, improved measuring accuracy, and mounting or dismounting are convenient, can reuse.
Technical scheme of the present invention is as follows:
Integrated strain gauge means based on fiber Bragg grating strain sensor, comprise the fiber Bragg grating strain sensor that freely is placed on the metal construction to be measured, first magnetic ring is fixed on the metal construction to be measured by magnetic force, and surround fiber Bragg grating strain sensor, locating ring and outer positioning ring in set collar has, outer positioning ring is fixed on first magnetic ring, the optical fiber grating temperature compensation sensor support is on support plate, support plate is fixed on the interior locating ring of set collar, fiber Bragg grating strain sensor and optical fiber grating temperature compensation sensor are positioned at by support plate, set collar, in the confined space that first magnetic ring and metal construction to be measured form, gland bonnet is fixed on the outer positioning ring of set collar, the gland bonnet bottom has back-shaped flange, described back-shaped flange fits tightly on metal construction to be measured, second magnetic ring covers on the described back-shaped flange of gland bonnet, the waterproof sealing plate is fixed on the outer positioning ring of set collar, the optical fiber one that fiber Bragg grating strain sensor two connects is successively from first magnetic ring, gland bonnet passes, and the optical fiber two that optical fiber grating temperature compensation sensor two connects is successively from set collar, gland bonnet passes.
Its further technical scheme is:
The lower surface of described outer positioning ring is smeared vaseline, is pasted and fixed on first magnetic ring by metal-to-metal adhesive.
Described support plate is pasted and fixed on the interior locating ring of set collar by metal-to-metal adhesive.
Described optical fiber grating temperature compensation sensor is placed on the support plate, the optical fiber two that optical fiber grating temperature compensation sensor two connects passes from the optical fiber outlet at support plate two ends, and the optical fiber grating temperature compensation sensor is supported on the support plate by optical fiber two and the outlet of described optical fiber.
Described waterproof sealing plate is fixed on the outer positioning ring of set collar by set bolt.
Technique effect of the present invention:
The present invention adopts fiber Bragg grating strain sensor and the optical fiber grating temperature compensation sensor can be to strain and temperature simultaneously measuring simultaneously, the temperature compensation function in the time of can realizing the fiber sensor measuring strain by corresponding operation method; Simultaneously, the present invention is in the installation process of strain gauge means, fiber Bragg grating strain sensor and optical fiber grating temperature compensation sensor are placed in the confined space that is formed by support plate, set collar, first magnetic ring and metal construction to be measured, by gland bonnet and waterproof sealing plate fiber Bragg grating strain sensor and optical fiber grating temperature compensation sensor are carried out waterproof sealing again, improved the waterproof sealing performance of measurement mechanism, the present invention possesses temperature compensation function and waterproof sealing performance preferably simultaneously, can guarantee the accuracy of measurement result; The recycling of integrated strain gauge means of the present invention can be realized by the movement of second magnetic ring and first magnetic ring, cost can be saved.
Description of drawings
Fig. 1 is perspective view of the present invention.
Fig. 2 is the semisectional view of Fig. 1.
Fig. 3 is structure exploded perspective view of the present invention, and wherein the part-structure of sensor installation decomposes.
Fig. 4 is the structure exploded perspective view of sensor installation part among the present invention.
Fig. 5 is the assembly structure synoptic diagram of optical fiber grating temperature compensation sensor and support plate.
Wherein: 1, metal construction to be measured; 2, fiber Bragg grating strain sensor; 21, optical fiber one; 3, first magnetic ring; 4, set collar; 41, interior locating ring; 42, outer positioning ring; 5, optical fiber grating temperature compensation sensor; 51, optical fiber two; 6, gland bonnet; 7, second magnetic ring; 8, waterproof sealing plate; 9, support plate.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
See Fig. 4, the present invention includes the fiber Bragg grating strain sensor 2 that freely is placed on the metal construction 1 to be measured, first magnetic ring 3 is fixed on the upper surface of metal construction 1 to be measured by magnetic force, and surround fiber Bragg grating strain sensor 2, locating ring 41 and outer positioning ring 42 in set collar 4 has, outer positioning ring 42 is fixed on first magnetic ring 3, see Fig. 5, optical fiber grating temperature compensation sensor 5 freely is supported on the support plate 9, optical fiber grating temperature compensation sensor 5 is placed on the support plate 9, the optical fiber 2 51 that optical fiber grating temperature compensation sensor 5 two connect passes from the optical fiber outlet at support plate 9 two ends, optical fiber grating temperature compensation sensor 5 is supported on the support plate 9 by optical fiber 2 51 and optical fiber outlet, see Fig. 4, support plate 9 is fixed on the interior locating ring 41 of set collar 4, and fiber Bragg grating strain sensor 2 and optical fiber grating temperature compensation sensor 5 are positioned at by support plate 9, set collar 4, in the confined space that first magnetic ring 3 and metal construction to be measured 1 form; See Fig. 2, Fig. 3, rubber closure 6 is fixed on the outer positioning ring 42 of set collar 4, gland bonnet 6 bottoms have back-shaped flange, described back-shaped flange fits tightly the upper surface in metal construction 1 to be measured, second magnetic ring 7 covers on the described back-shaped flange of gland bonnet 6, waterproof sealing plate 8 is fixed on the outer positioning ring 42 of set collar 4 by set bolt, the optical fiber 1 that fiber Bragg grating strain sensor 2 two connect is successively from first magnetic ring 3, gland bonnet 6 passes, the optical fiber 2 51 that optical fiber grating temperature compensation sensor 5 two connect is successively from set collar 4, gland bonnet 6 passes, and total assembling structure of the present invention is referring to Fig. 1.
Further, the lower surface of outer positioning ring 42 is smeared vaseline, is pasted and fixed on first magnetic ring 3 by metal-to-metal adhesive; Support plate 9 is pasted and fixed on the interior locating ring 41 of set collar 4 by metal-to-metal adhesive.
The present invention adopts fiber Bragg grating strain sensor 2 and the optical fiber grating temperature compensation sensor 5 can be to strain and temperature simultaneously measuring simultaneously, the temperature compensation function in the time of can realizing the fiber sensor measuring strain by corresponding operation method; Simultaneously, the present invention is in the installation process of strain gauge means, fiber Bragg grating strain sensor 2 and optical fiber grating temperature compensation sensor 5 are placed in the confined space that is formed by support plate 9, set collar 4, first magnetic ring 3 and metal construction to be measured 1, carry out waterproof sealing by gland bonnet 6 and 8 pairs of fiber Bragg grating strain sensors 2 of waterproof sealing plate and optical fiber grating temperature compensation sensor 5 again, improved the waterproof sealing performance of measurement mechanism.
First magnetic ring 3 of the present invention, set collar 4, support plate 9 are processed according to the specific requirement design of fiber grating work strain sensor 2, by mobile second magnetic ring 7 and first magnetic ring 3, the recycling of integrated strain gauge means of the present invention can be realized, cost can be saved.
More than describing is explanation of the invention, is not that institute of the present invention restricted portion within protection scope of the present invention, can be done any type of modification referring to claim to the restriction of invention.
Claims (5)
1. based on the integrated strain gauge means of fiber Bragg grating strain sensor, it is characterized in that: comprise the fiber Bragg grating strain sensor (2) that freely is placed on the metal construction to be measured (1), first magnetic ring (3) is fixed on the metal construction to be measured (1) by magnetic force, and surround fiber Bragg grating strain sensor (2), set collar (4) has interior locating ring (41) and outer positioning ring (42), outer positioning ring (42) is fixed on first magnetic ring (3), optical fiber grating temperature compensation sensor (5) is supported on the support plate (9), support plate (9) is fixed on the interior locating ring (41) of set collar (4), fiber Bragg grating strain sensor (2) and optical fiber grating temperature compensation sensor (5) are positioned at by support plate (9), set collar (4), in the confined space that first magnetic ring (3) and metal construction to be measured (1) form, gland bonnet (6) is fixed on the outer positioning ring (42) of set collar (4), gland bonnet (6) bottom has back-shaped flange, described back-shaped flange fits tightly on metal construction to be measured (1), second magnetic ring (7) covers on the described back-shaped flange of gland bonnet (6), waterproof sealing plate (8) is fixed on the outer positioning ring (42) of set collar (4), the optical fiber one (21) that fiber Bragg grating strain sensor (2) two connects is successively from first magnetic ring (3), gland bonnet (6) passes, and the optical fiber two (51) that optical fiber grating temperature compensation sensor (5) two connects is successively from set collar (4), gland bonnet (6) passes.
2. by the described integrated strain gauge means based on fiber Bragg grating strain sensor of claim 1, it is characterized in that: the lower surface of described outer positioning ring (42) is smeared vaseline, is pasted and fixed on first magnetic ring (3) by metal-to-metal adhesive.
3. by the described integrated strain gauge means based on fiber Bragg grating strain sensor of claim 1, it is characterized in that: described support plate (9) is pasted and fixed on the interior locating ring (41) of set collar (4) by metal-to-metal adhesive.
4. by the described integrated strain gauge means based on fiber Bragg grating strain sensor of claim 1, it is characterized in that: described optical fiber grating temperature compensation sensor (5) is placed on the support plate (9), the optical fiber two (51) that optical fiber grating temperature compensation sensor (5) two connects passes from the optical fiber outlet at support plate (9) two ends, and optical fiber grating temperature compensation sensor (5) is supported on the support plate (9) by optical fiber two (51) and the outlet of described optical fiber.
5. by the described integrated strain gauge means based on fiber Bragg grating strain sensor of the arbitrary claim of claim 1 to 4, it is characterized in that: described waterproof sealing plate (8) is fixed on the outer positioning ring (42) of set collar (4) by set bolt.
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| CN201310157948.3A CN103278101B (en) | 2013-05-02 | 2013-05-02 | Based on the integrated strain gauge means of fiber Bragg grating strain sensor |
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| CN201310157948.3A CN103278101B (en) | 2013-05-02 | 2013-05-02 | Based on the integrated strain gauge means of fiber Bragg grating strain sensor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300569A (en) * | 2015-10-10 | 2016-02-03 | 中国建筑第六工程局有限公司 | Temperature compensating block structure for monitoring special-shaped steel structure, and stress monitoring method |
| CN105806248A (en) * | 2016-05-30 | 2016-07-27 | 中国船舶重工集团公司第七0四研究所 | Marine fiber grating strain sensor |
| CN109682515A (en) * | 2019-02-20 | 2019-04-26 | 天津师范大学 | Optical fiber optical grating stress sensor and application for the measurement of hull local strength |
| CN110823120A (en) * | 2019-12-13 | 2020-02-21 | 大连理工大学 | Compensation method for measurement error of surface-mounted fiber grating strain sensor |
| CN110864641A (en) * | 2019-11-19 | 2020-03-06 | 天津大学 | Protection device of fiber grating strain sensor in splash zone of ocean platform |
| CN111311872A (en) * | 2020-02-18 | 2020-06-19 | 上海中船船舶设计技术国家工程研究中心有限公司 | Long-term monitoring and alarming system for stress of hull structure |
| CN111307325A (en) * | 2020-03-26 | 2020-06-19 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Temperature compensation device of fiber grating strain sensor made of reinforced fiber composite material |
| CN112904550A (en) * | 2021-01-29 | 2021-06-04 | 华中科技大学 | Terahertz wave amplitude modulator based on multilayer silicon-based grating and preparation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570733Y (en) * | 2002-10-10 | 2003-09-03 | 张继昌 | Optical fibre strain transducer |
| JP2005114403A (en) * | 2003-10-03 | 2005-04-28 | Tokyo Sokki Kenkyusho Co Ltd | Strain measuring instrument |
| CN201322605Y (en) * | 2008-11-26 | 2009-10-07 | 长安大学 | Temperature self-compensating fiber grating strain sensor |
| DE102011083028A1 (en) * | 2011-09-20 | 2013-03-21 | Günter-Köhler-Institut für Fügetechnik und Werkstoffprüfung GmbH | Mounting assembly for mounting strain measuring element such as fiber Bragg grating sensor (FBGS) on measurement object, has two holding units through which the strain measuring elements are releasably fixed in the assembled state |
-
2013
- 2013-05-02 CN CN201310157948.3A patent/CN103278101B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570733Y (en) * | 2002-10-10 | 2003-09-03 | 张继昌 | Optical fibre strain transducer |
| JP2005114403A (en) * | 2003-10-03 | 2005-04-28 | Tokyo Sokki Kenkyusho Co Ltd | Strain measuring instrument |
| CN201322605Y (en) * | 2008-11-26 | 2009-10-07 | 长安大学 | Temperature self-compensating fiber grating strain sensor |
| DE102011083028A1 (en) * | 2011-09-20 | 2013-03-21 | Günter-Köhler-Institut für Fügetechnik und Werkstoffprüfung GmbH | Mounting assembly for mounting strain measuring element such as fiber Bragg grating sensor (FBGS) on measurement object, has two holding units through which the strain measuring elements are releasably fixed in the assembled state |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300569A (en) * | 2015-10-10 | 2016-02-03 | 中国建筑第六工程局有限公司 | Temperature compensating block structure for monitoring special-shaped steel structure, and stress monitoring method |
| CN105300569B (en) * | 2015-10-10 | 2018-09-18 | 中国建筑第六工程局有限公司 | Method for different formed steel construction stress monitoring |
| CN105806248A (en) * | 2016-05-30 | 2016-07-27 | 中国船舶重工集团公司第七0四研究所 | Marine fiber grating strain sensor |
| CN105806248B (en) * | 2016-05-30 | 2017-08-25 | 中国船舶重工集团公司第七0四研究所 | Fiber Bragg grating strain sensor peculiar to vessel |
| CN109682515A (en) * | 2019-02-20 | 2019-04-26 | 天津师范大学 | Optical fiber optical grating stress sensor and application for the measurement of hull local strength |
| CN110864641A (en) * | 2019-11-19 | 2020-03-06 | 天津大学 | Protection device of fiber grating strain sensor in splash zone of ocean platform |
| CN110823120A (en) * | 2019-12-13 | 2020-02-21 | 大连理工大学 | Compensation method for measurement error of surface-mounted fiber grating strain sensor |
| CN110823120B (en) * | 2019-12-13 | 2020-08-14 | 大连理工大学 | Compensation method for measurement error of surface-mounted fiber grating strain sensor |
| CN111311872A (en) * | 2020-02-18 | 2020-06-19 | 上海中船船舶设计技术国家工程研究中心有限公司 | Long-term monitoring and alarming system for stress of hull structure |
| CN111307325A (en) * | 2020-03-26 | 2020-06-19 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Temperature compensation device of fiber grating strain sensor made of reinforced fiber composite material |
| CN111307325B (en) * | 2020-03-26 | 2021-03-09 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Temperature compensation device of fiber grating strain sensor made of reinforced fiber composite material |
| CN112904550A (en) * | 2021-01-29 | 2021-06-04 | 华中科技大学 | Terahertz wave amplitude modulator based on multilayer silicon-based grating and preparation method |
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| CN103278101B (en) | 2015-12-02 |
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