CN108519065A - Differential optical fiber Bragg grating tilt angle sensor and application method thereof - Google Patents
Differential optical fiber Bragg grating tilt angle sensor and application method thereof Download PDFInfo
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- CN108519065A CN108519065A CN201810346637.4A CN201810346637A CN108519065A CN 108519065 A CN108519065 A CN 108519065A CN 201810346637 A CN201810346637 A CN 201810346637A CN 108519065 A CN108519065 A CN 108519065A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000007667 floating Methods 0.000 claims abstract description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000009529 body temperature measurement Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000382 optic material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
The invention discloses a differential optical fiber Bragg grating tilt angle sensor and a use method thereof, wherein the differential optical fiber Bragg grating tilt angle sensor comprises a container, a base, liquid, a hollow floating ball, a transmission rod, an equal-strength cantilever beam, an optical fiber Bragg grating and a lead-out optical fiber; the container is fixedly installed on the base, liquid is filled in the container, an equal-strength cantilever beam is installed and arranged in the middle of the top in the container through screws, an optical fiber Bragg grating is arranged on the equal-strength cantilever beam in a sticking mode, and the free end of the equal-strength cantilever beam is connected with the top end of the transmission rod in a matching mode. The device has a simple structure and is convenient to operate, the inclination angle detection of the object to be detected is converted into the modulation of the wavelength of the optical fiber Bragg grating, and the wavelength shift of the optical fiber Bragg grating has a linear relation with the inclination angle of the object to be detected; the adopted fiber Bragg grating has strong corrosion resistance and electromagnetic interference (EMI) resistance; the temperature sensor does not carry any electric signal, and can be suitable for temperature measurement in high-risk environments such as strong electromagnetism, inflammability, explosiveness and the like.
Description
Technical field
The invention belongs to technical field of electronic measurement, specifically a kind of differential optical fiber Bragg grating obliquity sensors
And its application method.
Background technology
Angular measure is the important component of geometric sense metering, and obliquity sensor is also referred to as dipmeter, inclinometer, water
Level, inclinometer are frequently used for the level angle measure of the change of system, and level meter is from past simple spirit level to now
Electrolevel be automation and electronic measurement technique development result.As a kind of detection instrument, it has become bridge
The fields such as erection, railway laying, civil engineering, oil drilling, aviation and navigation, industrial automation, intelligent platform, mechanical processing
Indispensable important survey tool.Concrete application includes high-precision laser instrument level, engineering mechanical device leveling, long distance
From distance mearuring equipment, High Altitude Platform safeguard protection, orient the pitch angle measurement of satellite communication antenna, ship's navigation attitude measurement,
The application of shield push pipe, dam detection, the monitoring of geology device inclined, system for artillery initial angle measures, radar vehicle platform is examined
Survey, satellite communication vehicle attitude detection etc..
In recent years, the advantages such as fibre optical sensor, at low cost and strong antijamming capability high with its precision are widely used in
Field of measuring technique.Optical fiber inclination angle sensing has many good qualities compared with traditional obliquity sensor, small such as high sensitivity,
Corrosion-resistant, anti-electromagnetic-radiation, light path is flexible, convenient for telemetering etc., especially copes with and measures ring in strong electromagnetic, inflammable, explosive etc.
When border, Fiber Bragg Grating Temperature sensor uses fiber optic materials, is to use optical signal in the transmission of signal and sensing,
Realize scene without electrical measurement, provide a kind of on-line measurement mode of essential safety.
In the above context, a kind of differential optical fiber Bragg grating obliquity sensors are had devised.The sensor structure
Simply, easy to operation, strong antijamming capability can be used for the inclination angle under a variety of environment and measure.
Invention content
The technical problem to be solved in the present invention is to provide a kind of differential optical fiber Bragg gratings obliquity sensor and its make
Use method；It can measure inclined angle of object；For the angle measurement of a variety of application environments.
In order to which the technology and method that solve the problem above-mentioned use of the invention are as follows：
A kind of differential optical fiber Bragg grating obliquity sensors, including container, pedestal, liquid, hollow float, transmission
Bar, equi intensity cantilever, optical fiber Bragg raster and export optical fiber；The container is fixedly mounted on pedestal, in the container
Portion is equipped with liquid, has equi intensity cantilever, the equal strength by screw installation settings on container inner top centre position
It is glued on cantilever beam and is provided with optical fiber Bragg raster, free end and the cooperation of drive link top of the equi intensity cantilever connect
It connects, the drive link lower end is connected with hollow float, and the hollow float suspension is set on liquid surface, the light
It is provided with export optical fiber on fiber Bragg grating, the export optical fiber is drawn simultaneously by the fiber outlet for being arranged in container top
It is connected with external optical cable.
Further, there are two optical fiber Bragg raster settings, the optical fiber Bragg raster is respectively adhered on it is equal by force
Spend cantilever beam two walls up and down.
Further, the hollow float is lifted by the liquid level of container internal liquid, drives drive link lifting, to
Equi intensity cantilever is set to deform upon.
Further, the method is as follows：
S1, sensor base is placed on testee, container and pedestal are identical as testee angle of inclination, hold
Still in horizontality, hollow float lifts liquid in device with the liquid level of liquid at this time, and drive link is made to occur to rise
Drop is converted into buoyancy the pressure of equivalent intensities cantilever beam free end, and then drives and be pasted onto equi intensity cantilever two walls up and down
Optical fiber Bragg raster stretch and compression, to analyze to obtain according to optical fiber Bragg raster (FBG) demodulator, to be pasted onto equal strength outstanding
The centre wavelength difference Δ λ of the optical fiber Bragg raster of two walls above and below arm beamB；
S2, basis are pasted onto the centre wavelength difference Δ λ of the optical fiber Bragg raster of two walls of equi intensity cantilever or moreBWith
The relational expression of inclined angle of objectCalculate the angle of inclination of testee；
In formula：L is the active length of equi intensity cantilever, and h is the thickness of equi intensity cantilever, and B is equi intensity cantilever
The width of fixing end, E are the elasticity modulus of equi intensity cantilever, SεFor the strain sensitive coefficient of fiber Bragg grating, λBFor light
The centre wavelength of fiber Bragg grating, ρ are the density of liquid, and g is gravity coefficient, and s is the cross-sectional area of drive link bar.
The operation principle of the present invention：In the initial state, liquid is in horizontality to sensor relative to container, waits strong
Degree cantilever beam does not deform upon, if sensor base is placed on testee, container and pedestal and testee inclination angle
Spend identical, and according to the liquid in physical principle container still in horizontality, hollow float occurs with the liquid level of liquid at this time
Lifting, and drive link is made to lift, buoyancy is converted into the pressure of equivalent intensities cantilever beam free end, and then drive and paste
The optical fiber Bragg raster of two walls stretches and compresses (the optical fiber Bragg raster stretching of upper and lower two wall above and below equi intensity cantilever
It is exactly the opposite with compressing), the differential type of optical fiber Bragg raster pastes the influence for helping to offset environment temperature, fiber Bragg
The export optical fiber of grating is drawn by vessel port and is connected with external optical cable.Therefore, it converts pair the inclination angle detection of object to
The measurement at object inclination angle is realized in the modulation of optical fiber Bragg raster wavelength.
The mathematics model analysis of the present invention is as follows：
The calculation formula of equi intensity cantilever free end stress F is：
F=ρ gs Δs H (1)
In formula, ρ is the density of fluid to be measured 3 in container 1, and g is gravity coefficient, and s is the cross-sectional area of drive link 5, Δ H
Change for the liquid level of container.
The strain of 6 each point of equi intensity cantilever is：
ε=6Fl/ (Bh2E) (2)
In formula, l is the active length of equi intensity cantilever 6, and h is the thickness of equi intensity cantilever 6, and B is equal strength cantilever
The width of 6 fixing end of beam, E are the elasticity modulus of equi intensity cantilever 6.
(1) formula is brought into (2) formula to obtain：
That upper surface is subject to is elongation strain ε, and that lower surface is subject to is compression strain-ε, if two gratings are in same
In the temperature field of sample, strain signal ε is represented by：
In formula, SEFor the strain sensitive coefficient of optical fiber Bragg raster, λBFor optical fiber Bragg raster initial center wavelength.
It is pasted onto the 7 centre wavelength difference Δ λ of optical fiber Bragg raster of about 6 two wall of equi intensity cantileverBFor：
ΔλB=λB(ε, T)-λB(- ε, T) (5)
Then：
Being just cut to due to tilt angle theta again：
Formula (6) is substituted into formula (7)：
So as to obtain angle of inclination：
Formula (9) shows tested testee tilt angle theta and optical fiber Bragg raster wavelength-shift Δ λBBetween number
Relationship can calculate the angle of inclination of testee by measuring optical fiber Bragg raster wavelength-shift, thus realize
The measurement at inclination angle.
The beneficial effects of the invention are as follows：
1. converting the inclination angle detection of testee to the modulation to optical fiber Bragg raster wavelength, optical fiber Bragg raster
Wavelength-shift has linear relationship with testee angle of inclination.
2. the optical fiber Bragg raster used has very strong corrosion resistance and anti-electromagnetic interference capability (EMI).
3, without any electric signal, the temperature being applicable in the high-risk environments such as strong electromagnetic, inflammable, explosive measures.
4, simple in structure, easy to operation.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will to embodiment or
Attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
Some embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
It can be obtain other attached drawings according to these attached drawings；
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the local overlooking schematic diagram of invention moderate strength cantilever beam；
Fig. 3 is the partial side schematic diagram of invention moderate strength cantilever beam；
Each label in figure：1 it is container, 2 be pedestal, 3 be liquid, 4 be hollow float, 5 be drive link, 6 is that equal strength is outstanding
Arm beam, 7 be optical fiber Bragg raster, 8 be export optical fiber.
Specific implementation mode
The preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention
It can be easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention；
As shown in Figs. 1-3, a kind of differential optical fiber Bragg grating obliquity sensors of technical solution of the present invention, including container
1, pedestal 2, liquid 3, hollow float 4, drive link 5, equi intensity cantilever 6, optical fiber Bragg raster 7 and export optical fiber 8；It is described
Container 1 is fixedly mounted on pedestal 2, and 1 inside of the container is equipped with liquid 3, and the container passes through on 1 inner top centre position
Screw installation settings has equi intensity cantilever 6, is glued on the equi intensity cantilever 6 and is provided with optical fiber Bragg raster 7, described
The free end of equi intensity cantilever 6 is connected with 5 top of drive link, and 5 lower end of the drive link is connected with hollow floating
Ball 4, the suspension of the hollow float 4 are set on 3 surface of liquid, and export optical fiber 8 is provided on the optical fiber Bragg raster 7,
The export optical fiber 8 is by being arranged the fiber outlet extraction at 1 top of container and being connected with external optical cable.
There are two the settings of the optical fiber Bragg raster 7, and the optical fiber Bragg raster 7 is respectively adhered on equal strength cantilever
About 6 two wall of beam.
The hollow float 4 is lifted by the liquid level of 1 internal liquid 3 of container, and drive link 5 is driven to lift, strong to make to wait
Degree cantilever beam 6 deforms upon.
A kind of application method of differential optical fiber Bragg grating obliquity sensors, the method are as follows：
S1, sensor base 2 being placed on testee, container 1 and pedestal 2 are identical as testee angle of inclination,
Still in horizontality, hollow float 4 lifts liquid 3 in container 1 with the liquid level of liquid 3 at this time, and makes drive link 5
It lifts, buoyancy is converted into the pressure of 6 free end of equivalent intensities cantilever beam, and then drive and be pasted onto equi intensity cantilever 6
The optical fiber Bragg raster 7 of upper and lower two wall stretches and compression, is pasted onto to be analyzed according to optical fiber Bragg raster (FBG) demodulator
The centre wavelength difference Δ λ of the optical fiber Bragg raster 7 of about 6 two wall of equi intensity cantileverB；
S2, basis are pasted onto the centre wavelength difference Δ λ of the optical fiber Bragg raster 7 of about 6 two wall of equi intensity cantileverB
With the relational expression of inclined angle of objectCalculate the angle of inclination of testee；
In formula：L is the active length of equi intensity cantilever 6, and h is the thickness of equi intensity cantilever 6, and B is equal strength cantilever
The width of 6 fixing end of beam, E are the elasticity modulus of equi intensity cantilever 6, SεFor the strain sensitive coefficient of optical fiber Bragg raster 7,
λBFor the centre wavelength of optical fiber Bragg raster 7, ρ is the density of liquid 3, and g is gravity coefficient, and s is the cross section of drive link bar 5
Product.
Its design parameter is：
1, the technical parameter of optical fiber Bragg raster 7 is：Central wavelength lambdaB=1550nm；
2, the dimensional parameters of equi intensity cantilever are：Active length l is 120mm, and fixed point width B is 68mm, 45# steel
Young ' s modulus is E=200GPa, and cantilever beam thickness h is 2mm；
3, the parameter of liquid is：Density p=10 × 102, gravity coefficient g=9.8；
4, the cross-sectional area of drive link is s=102 × π mm2
5, the configuration experiment of attached drawing 1 is pressed；
6, the shift value Δ λ of the centre wavelength of optical fiber Bragg raster 7 is obtained with fiber Bragg grating (FBG) demodulatorB；
7, according to formula 8, the Bragg wavelength-shift Δs λ of optical fiber Bragg rasterBIt is sensitive to the response at testee inclination angle
Degree is：
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, appoints
Why not pass through the change or replacement that creative work is expected, should be covered by the protection scope of the present invention, therefore, this hair
Bright protection domain should be determined by the scope of protection defined in the claims.
Claims (4)
1. a kind of differential optical fiber Bragg grating obliquity sensors, which is characterized in that including container (1), pedestal (2), liquid
(3), hollow float (4), drive link (5), equi intensity cantilever (6), optical fiber Bragg raster (7) and export optical fiber (8)；It is described
Container (1) is fixedly mounted on pedestal (2), and liquid (3), container (1) the inner top interposition are housed inside the container (1)
Set has equi intensity cantilever (6) by screw installation settings, is glued on the equi intensity cantilever (6) and is provided with optical fiber
Bragg gratings (7), free end and drive link (5) top of the equi intensity cantilever (6) are connected, the drive link (5)
Lower end is connected with hollow float (4), and the hollow float (4) suspends and is set on liquid (3) surface, the optical fiber
Export optical fiber (8) is provided on Bragg gratings (7), the export optical fiber (8) is gone out by the optical fiber being arranged at the top of container (1)
Mouth draws and is connected with external optical cable.
2. a kind of differential optical fiber Bragg grating obliquity sensors as described in claim 1, it is characterised in that：The optical fiber
There are two Bragg gratings (7) settings, and the optical fiber Bragg raster (7) is respectively adhered on equi intensity cantilever (6) two wall up and down.
3. a kind of differential optical fiber Bragg grating obliquity sensors as described in claim 1, it is characterised in that：It is described hollow
Floating ball (4) is lifted by the liquid level of container (1) internal liquid (3), drives drive link (5) to lift, to make equi intensity cantilever
(6) it deforms upon.
4. a kind of application method of differential optical fiber Bragg grating obliquity sensors as described in claim 1, feature exist
In：The method is as follows：
S1, sensor base (2) is placed on testee, container (1) and pedestal (2) and testee angle of inclination phase
Together, the liquid (3) in container (1) is lifted still in horizontality, at this time hollow float (4) with the liquid level of liquid (3), and
So that drive link (5) is lifted, buoyancy is converted into the pressure of equivalent intensities cantilever beam (6) free end, and then drive and be pasted onto
The optical fiber Bragg raster (7) of equi intensity cantilever (6) two walls up and down stretches and compression, to being demodulated according to optical fiber Bragg raster
Instrument analyzes to obtain the centre wavelength difference Δ λ for being pasted onto equi intensity cantilever (6) optical fiber Bragg raster (7) of two walls up and downB；
S2, according to the centre wavelength difference Δ λ for being pasted onto equi intensity cantilever (6) optical fiber Bragg raster (7) of two walls up and downBWith
The relational expression of inclined angle of objectCalculate the angle of inclination of testee；
In formula：L is the active length of equi intensity cantilever (6), and h is the thickness of equi intensity cantilever (6), and B is equal strength cantilever
The width of beam (6) fixing end, E are the elasticity modulus of equi intensity cantilever (6), SεFor the strain sensitive of optical fiber Bragg raster (7)
Coefficient, λBFor the centre wavelength of optical fiber Bragg raster (7), ρ is the density of liquid (3), and g is gravity coefficient, and s is drive link bar
(5) cross-sectional area.
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| CN201810346637.4A CN108519065A (en) | 2018-04-18 | 2018-04-18 | Differential optical fiber Bragg grating tilt angle sensor and application method thereof |
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| CN201810346637.4A CN108519065A (en) | 2018-04-18 | 2018-04-18 | Differential optical fiber Bragg grating tilt angle sensor and application method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110118539A (en) * | 2019-05-24 | 2019-08-13 | 西南交通大学 | A kind of optical fiber obliquity sensor overcoming temperature interference and method |
| CN110146053A (en) * | 2019-06-17 | 2019-08-20 | 天津师范大学 | Fiber-optic grating sensor and application for hull yawing motion measurement |
| CN110631549A (en) * | 2019-10-31 | 2019-12-31 | 广州万构建筑工程设计有限公司 | Roadbed settlement monitoring device based on fiber bragg grating |
| CN113532379A (en) * | 2021-07-29 | 2021-10-22 | 铁正检测科技有限公司 | Building engineering settlement monitoring device, monitoring system and method |
| CN116358485A (en) * | 2023-06-01 | 2023-06-30 | 通达电磁能股份有限公司 | Ship body attitude dynamic monitoring sensor and installation and use method thereof |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0875532A (en) * | 1994-09-02 | 1996-03-22 | Trinity Ind Corp | Liquid level detector for paint tank |
| JPH0943029A (en) * | 1995-07-27 | 1997-02-14 | Trinity Ind Corp | Liquid level detection apparatus |
| CN2715126Y (en) * | 2004-07-20 | 2005-08-03 | 重庆大学 | Optical fiber inclination sensor |
| CN101629890A (en) * | 2009-08-17 | 2010-01-20 | 昆明理工大学 | Float type fiber grating liquid densimeter |
| CN101650209A (en) * | 2009-09-09 | 2010-02-17 | 昆明理工大学 | Convoluted diaphragm-type optical fiber Bragg raster liquid level sensor |
| CN102809521A (en) * | 2012-07-30 | 2012-12-05 | 昆明理工大学 | Float type optical fiber Bragg grating density sensor of Pb-Sn (plumbum-stannum) molten alloy |
| US20140002275A1 (en) * | 2012-06-28 | 2014-01-02 | National Applied Research Laboratories | Bridge Safety Monitoring Integrated System with Full Optical Fiber and the Method for Sensing Thereof |
| CN103674179A (en) * | 2013-12-16 | 2014-03-26 | 昆明理工大学 | Optical fiber Bragg optical grating liquid level sensor of differential type lever structure and using method thereof |
| CN104279986A (en) * | 2014-09-18 | 2015-01-14 | 昆明理工大学 | Piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and using method thereof |
| WO2016169485A1 (en) * | 2015-04-23 | 2016-10-27 | 山东大学 | Circumferentially-identifiable inclinometer sensor based on fiber grating |
| CN106091971A (en) * | 2016-06-08 | 2016-11-09 | 武汉理工大学 | The linear on-line monitoring system of Longspan Bridge based on fiber grating and monitoring method |
| CN107345806A (en) * | 2016-05-06 | 2017-11-14 | 财团法人国家实验研究院 | Detection system and detection method using same |
| WO2018050057A1 (en) * | 2016-09-13 | 2018-03-22 | 南京南瑞继保电气有限公司 | Device for detecting water leakage of valve tower of high-pressure converter valve |
| CN208109035U (en) * | 2018-04-18 | 2018-11-16 | 红云红河烟草(集团)有限责任公司 | Differential optical fiber Bragg grating inclination angle sensor |
-
2018
- 2018-04-18 CN CN201810346637.4A patent/CN108519065A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0875532A (en) * | 1994-09-02 | 1996-03-22 | Trinity Ind Corp | Liquid level detector for paint tank |
| JPH0943029A (en) * | 1995-07-27 | 1997-02-14 | Trinity Ind Corp | Liquid level detection apparatus |
| CN2715126Y (en) * | 2004-07-20 | 2005-08-03 | 重庆大学 | Optical fiber inclination sensor |
| CN101629890A (en) * | 2009-08-17 | 2010-01-20 | 昆明理工大学 | Float type fiber grating liquid densimeter |
| CN101650209A (en) * | 2009-09-09 | 2010-02-17 | 昆明理工大学 | Convoluted diaphragm-type optical fiber Bragg raster liquid level sensor |
| US20140002275A1 (en) * | 2012-06-28 | 2014-01-02 | National Applied Research Laboratories | Bridge Safety Monitoring Integrated System with Full Optical Fiber and the Method for Sensing Thereof |
| CN102809521A (en) * | 2012-07-30 | 2012-12-05 | 昆明理工大学 | Float type optical fiber Bragg grating density sensor of Pb-Sn (plumbum-stannum) molten alloy |
| CN103674179A (en) * | 2013-12-16 | 2014-03-26 | 昆明理工大学 | Optical fiber Bragg optical grating liquid level sensor of differential type lever structure and using method thereof |
| CN104279986A (en) * | 2014-09-18 | 2015-01-14 | 昆明理工大学 | Piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and using method thereof |
| WO2016169485A1 (en) * | 2015-04-23 | 2016-10-27 | 山东大学 | Circumferentially-identifiable inclinometer sensor based on fiber grating |
| CN107345806A (en) * | 2016-05-06 | 2017-11-14 | 财团法人国家实验研究院 | Detection system and detection method using same |
| CN106091971A (en) * | 2016-06-08 | 2016-11-09 | 武汉理工大学 | The linear on-line monitoring system of Longspan Bridge based on fiber grating and monitoring method |
| WO2018050057A1 (en) * | 2016-09-13 | 2018-03-22 | 南京南瑞继保电气有限公司 | Device for detecting water leakage of valve tower of high-pressure converter valve |
| CN208109035U (en) * | 2018-04-18 | 2018-11-16 | 红云红河烟草(集团)有限责任公司 | Differential optical fiber Bragg grating inclination angle sensor |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110118539A (en) * | 2019-05-24 | 2019-08-13 | 西南交通大学 | A kind of optical fiber obliquity sensor overcoming temperature interference and method |
| CN110146053A (en) * | 2019-06-17 | 2019-08-20 | 天津师范大学 | Fiber-optic grating sensor and application for hull yawing motion measurement |
| CN110146053B (en) * | 2019-06-17 | 2023-08-11 | 天津师范大学 | Fiber bragg grating sensor for measuring ship bow movement and application |
| CN110631549A (en) * | 2019-10-31 | 2019-12-31 | 广州万构建筑工程设计有限公司 | Roadbed settlement monitoring device based on fiber bragg grating |
| CN113532379A (en) * | 2021-07-29 | 2021-10-22 | 铁正检测科技有限公司 | Building engineering settlement monitoring device, monitoring system and method |
| CN116358485A (en) * | 2023-06-01 | 2023-06-30 | 通达电磁能股份有限公司 | Ship body attitude dynamic monitoring sensor and installation and use method thereof |
| CN116358485B (en) * | 2023-06-01 | 2023-08-25 | 通达电磁能股份有限公司 | Ship body attitude dynamic monitoring sensor and installation and use method thereof |
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