CN2748890Y - Fiber grating ice pressure sensor - Google Patents
Fiber grating ice pressure sensor Download PDFInfo
- Publication number
- CN2748890Y CN2748890Y CN 200420063787 CN200420063787U CN2748890Y CN 2748890 Y CN2748890 Y CN 2748890Y CN 200420063787 CN200420063787 CN 200420063787 CN 200420063787 U CN200420063787 U CN 200420063787U CN 2748890 Y CN2748890 Y CN 2748890Y
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- equal strength
- optical fiber
- grating
- shell
- ice pressure
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Abstract
The utility model provides a fiber grating ice pressure sensor, which comprises an outer casing, supporting bases arranged on both ends in the outer casing, and an equal strength perception beam installed in the middle of the outer casing. One end of the equal strength perception beam is fixed on a supporting base and the other end is a cantilever end. The optical fiber grating sensor is glued on the equal strength perception beam. The equal strength perception beam is provided with an elastic beam. Both ends of the elastic beam are supported on the supporting base and one of the both ends is fixed with the supporting base and the other end is not fixed. The mid-point of the elastic beam is connected with the cantilever end of the equal strength perception beam. The utility model also comprises a reinforcing beam. The beam plate of the reinforcing beam is positioned outside the outer casing and both ends extend into the outer casing and contact the elastic beam. The utility model has the advantages of temperature self-compensation, monitoring load independence of the application point, high precision, favorable durability, low cost, simple implementation, etc.
Description
(1) technical field
The utility model relates to a kind of sensor, specifically a kind of novel sensing device that is used to monitor or detect the ocean platform ice pressure.
(2) background technology
The marine site of high latitude area is in serious freezing state winter, and those area oil rich and natural gas sources, the ocean structure of Jian Zaoing is mainly ocean platform there, must be subjected to the various forms of effects of sea ice.The security of ocean structure under ice action has been subjected to great concern and attention, particularly two of the Cook Inlet drilling platform have more quickened the research of various countries to the safety problem of ocean platform under the ice pressure effect being pushed over by ice in less than the time in 2 years after the construction in history.The ice pressure test is one of core technology problem of this research direction.The ice pressure sensor that tradition is made by strain ga(u)ge has the endurance issues that can't cross over.
Optical fiber sensing technology obtains significant progress in recent years, and it is the desirable sensing element that is applicable to long term monitoring, is particularly useful for civil engineering structure.Sensor based on fiber grating is the functional sensor that fiber grating is made sensitive element, has the unrivaled advantage of other types Fibre Optical Sensor, and mainly contain: it uses the Wavelength-encoding transducing signal; Fiber-optic grating sensor is a self-reference, measurement be absolute value be not the metering interference fringe; The responsive part of fiber grating writes on the core district, need not the joints of optical fibre, mechanical assembling, grinding technics and Alignment Process by its sensor of forming; Fiber-optic grating sensor is highly sensitive, and dynamic range is big etc.At present, fiber-optic grating sensor has been widely used in fields such as civil engineering work, Aero-Space, petrochemical complex, medical science, environmental engineering.
(3) summary of the invention
The purpose of this utility model is to provide a kind of optical fiber grating ice pressure sensor device with high-durability.
The purpose of this utility model is achieved in that
It comprises shell, the two ends of enclosure are provided with bearing, the centre of shell is provided with equal strength perception beam, one end of equal strength perception beam is fixed on the bearing, the other end is cantilever end, post fiber-optic grating sensor on the equal strength perception beam, on the equal strength perception beam elastic beam is set, prop up in that fixedly the other end is fixing on the bearing and between an end wherein and the bearing at the two ends of elastic beam, the cantilever end overlap joint of the mid point of elastic beam and equal strength perception beam, it also comprises buckstay, and the beam slab of buckstay is arranged in outside the shell, two ends extend into shell and contact with elastic beam.
The utility model can also comprise some architectural features like this:
1, fiber-optic grating sensor is two, is pasted on the both sides of equal strength perception beam respectively.
2, be provided with spring retainer between the cantilever end of equal strength perception beam and the shell.
3, described light grating sensor is naked grating, and the light grating of equal strength perception beam both sides is drawn by an optical fiber series connection.
4, equal strength perception beam and shell and draw optical fiber and there is sealing glue at the slit of shell place.
5, drawing of fiber-optic grating sensor is provided with the protection box on the optical fiber transmission line.
Effective monitoring to ice pressure is the important content of offshore platform structure health monitoring.Fiber grating is one of sensing material that is most widely used in present intellectual material and the systematic study, have moisture resistance, resistance to corrosion strong, simple in structure, can conveniently change range, can form advantages such as distributed sensing network.The utility model is based on the fiber grating strain measuring principle, and the requirement manufacturing of measuring ice pressure according to offshore platform structure forms, and can well monitor the ice pressure load of ocean platform.
The utility model places fiber grating on the equal strength perception beam, and constitutes the sensing device that can monitor the ocean platform ice pressure with buckstay, elastic beam and whole force transmission mechanism thereof.Ice pressure passes to elastic beam by buckstay, because the position that buckstay and elastic beam joint have only two legs to prop up, the amount of deflection summation of two component and load point are irrelevant.Therefore, we can conveniently set up ice pressure load and perception beam strain relation.The corrosion resistant metal shell of optical fiber grating ice pressure transducer has effectively guaranteed the permanance characteristics of sensor, and this sensor has also possessed all advantages of fiber grating substantially: as corrosion-resistant, sensing accuracy is high, anti-electromagnetic interference (EMI), quasi-distributed sensing, absolute measurement, stability etc.In addition, adopt the beam of uniform strength at the optical fiber grating ice pressure transducer respectively to paste a fiber-optic grating sensor up and down and reach temperature compensation, solve its strain, temperature cross sensitivity problem, realize independent measurement strain.
(4) description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is that beam of uniform strength fiber grating of the present utility model is laid synoptic diagram.
(5) specific embodiments
Give an example to the utility model seat more detailed description below in conjunction with accompanying drawing:
In conjunction with Fig. 1, the optical fiber grating ice pressure sensor device comprises equal strength perception beam 3, the elastic beam 2 above the beam of uniform strength, and power transmission is given the buckstay 1 of elastic beam and is played the metal shell 5 of protection inner structure effect.The beam of uniform strength 3 is sensitive components, posts grating 6 above and carries out strain measurement, and an end of its broad is connected with bearing, and the other end is a cantilever end; The two ends of elastic beam 2 are connected respectively on the bearing 4, and elastic beam 2 is to transmit deformable members, and its two ends are freely-supported, a wherein end and bearing welding, and the other end does not need to fix, mid point and the beam of uniform strength 3 cantilever ends overlap joint.Buckstay 1 is main force transmission mechanism, and its main effect is that the plate of buckstay of outside bears ice pressure, then pressure is passed to elastic beam with the form of two concentrated forces.Because the position of two concentrated forces after transmitting is definite constant, so the measurement of this ice pressure sensor is not subjected to the form and the position influence that acts on buckstay of ice pressure.Buckstay 1 and shell 5 and draw optical fiber and the slit of shell 5 place all uses glue sealing.
In conjunction with Fig. 2, the utility model employing is respectively pasted a fiber-optic grating sensor 6 up and down at the beam of uniform strength and is reached temperature compensation, solves its strain, temperature cross sensitivity problem, realizes the independent measurement to strain.
Product of the present utility model can adopt such method to make: at first, according to the needs of the actual ice pressure that will monitor or measure, by mechanical analysis, design the size of each parts of optical fiber grating ice pressure transducer.Then, make the beam of uniform strength, elastic beam and the buckstay of laying optical fiber grating sensor respectively, the metal coating shell of encapsulation usefulness.Secondly, carry out the assembling of each parts according to structural design drawing, the especially laying of two gratings on the beam of uniform strength accomplishes that as far as possible the position is corresponding.The optical fiber of drawing is inserted the protection box.After waiting to assemble, the ice pressure fiber-optic grating sensor is demarcated, determined the range and the precision of sensor.At last, according to the basic theories method and the test calibration result of design, utilize related software development platform exploitation optical fiber grating ice pressure intelligent monitoring system.
Claims (8)
1, a kind of optical fiber grating ice pressure transducer, it comprises shell, it is characterized in that: the two ends of enclosure are provided with bearing, the centre of shell is provided with equal strength perception beam, one end of equal strength perception beam is fixed on the bearing, the other end is a cantilever end, post fiber-optic grating sensor on the equal strength perception beam, on the equal strength perception beam elastic beam is set, prop up on bearing at the two ends of elastic beam, and fixedly the other end is unfixing between an end wherein and the bearing, the cantilever end overlap joint of the mid point of elastic beam and equal strength perception beam, it also comprises buckstay, and the beam slab of buckstay is positioned at outside the shell, two ends extend in the shell and contact with elastic beam.
2, optical fiber grating ice pressure transducer according to claim 1 is characterized in that: fiber-optic grating sensor is two, is pasted on the both sides of equal strength perception beam respectively.
3, optical fiber grating ice pressure transducer according to claim 1 and 2 is characterized in that: be provided with spring retainer between the cantilever end of equal strength perception beam and the shell.
4, optical fiber grating ice pressure transducer according to claim 1 and 2 is characterized in that: described light grating sensor is naked grating, and the light grating of equal strength perception beam both sides is drawn by an optical fiber series connection.
5, optical fiber grating ice pressure transducer according to claim 3 is characterized in that: described light grating sensor is naked grating, and the light grating of equal strength perception beam both sides is drawn by an optical fiber series connection.
6, according to claim 1,2 or 5 described optical fiber grating ice pressure transducers, it is characterized in that: equal strength perception beam and shell and draw optical fiber and there is sealing glue at the slit of shell place.
7, optical fiber grating ice pressure transducer according to claim 3 is characterized in that: equal strength perception beam and shell and draw optical fiber and there is sealing glue at the slit of shell place.
8, optical fiber grating ice pressure transducer according to claim 4 is characterized in that: equal strength perception beam and shell and draw optical fiber and there is sealing glue at the slit of shell place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420063787 CN2748890Y (en) | 2004-11-17 | 2004-11-17 | Fiber grating ice pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420063787 CN2748890Y (en) | 2004-11-17 | 2004-11-17 | Fiber grating ice pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2748890Y true CN2748890Y (en) | 2005-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420063787 Expired - Fee Related CN2748890Y (en) | 2004-11-17 | 2004-11-17 | Fiber grating ice pressure sensor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100523754C (en) * | 2006-12-28 | 2009-08-05 | 中国科学院半导体研究所 | Optical fibre pressure intensity sensor based on beam of constant strength |
| CN101701860B (en) * | 2009-12-02 | 2011-01-05 | 大连理工大学 | Optical fiber grating ice-pressure sensor |
| CN102072787A (en) * | 2010-10-29 | 2011-05-25 | 中国科学院上海光学精密机械研究所 | Temperature self-compensation fiber grating tension sensor |
| CN103528734A (en) * | 2013-10-28 | 2014-01-22 | 北京理工大学 | Sensor used for simultaneously measuring load and temperature of flexible rope based on FBGs (fiber bragg gratings) |
| CN106501165A (en) * | 2016-11-09 | 2017-03-15 | 河海大学 | Temperature self-compensation fiber grating steel bar corrosion sensor and its temperature compensation |
| CN114777972A (en) * | 2022-04-25 | 2022-07-22 | 大连理工大学 | Cold region water area static ice pressure measuring device and installation method |
-
2004
- 2004-11-17 CN CN 200420063787 patent/CN2748890Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100523754C (en) * | 2006-12-28 | 2009-08-05 | 中国科学院半导体研究所 | Optical fibre pressure intensity sensor based on beam of constant strength |
| CN101701860B (en) * | 2009-12-02 | 2011-01-05 | 大连理工大学 | Optical fiber grating ice-pressure sensor |
| CN102072787A (en) * | 2010-10-29 | 2011-05-25 | 中国科学院上海光学精密机械研究所 | Temperature self-compensation fiber grating tension sensor |
| CN103528734A (en) * | 2013-10-28 | 2014-01-22 | 北京理工大学 | Sensor used for simultaneously measuring load and temperature of flexible rope based on FBGs (fiber bragg gratings) |
| CN106501165A (en) * | 2016-11-09 | 2017-03-15 | 河海大学 | Temperature self-compensation fiber grating steel bar corrosion sensor and its temperature compensation |
| CN106501165B (en) * | 2016-11-09 | 2023-12-29 | 河海大学 | Temperature self-compensating fiber grating steel bar corrosion sensor and temperature compensating method thereof |
| CN114777972A (en) * | 2022-04-25 | 2022-07-22 | 大连理工大学 | Cold region water area static ice pressure measuring device and installation method |
| CN114777972B (en) * | 2022-04-25 | 2024-05-28 | 大连理工大学 | Device for measuring static ice pressure in cold region water area and mounting method |
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Legal Events
| Date | Code | Title | Description |
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| 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 |