CN109682348A - Fiber-optic grating sensor and application for hull rolling and pitching measurement - Google Patents
Fiber-optic grating sensor and application for hull rolling and pitching measurement Download PDFInfo
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- CN109682348A CN109682348A CN201910125138.7A CN201910125138A CN109682348A CN 109682348 A CN109682348 A CN 109682348A CN 201910125138 A CN201910125138 A CN 201910125138A CN 109682348 A CN109682348 A CN 109682348A
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- 238000005259 measurement Methods 0.000 title claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 61
- 229910000906 Bronze Inorganic materials 0.000 claims abstract description 58
- 239000010974 bronze Substances 0.000 claims abstract description 58
- 239000013307 optical fiber Substances 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 4
- 239000003292 glue Substances 0.000 claims description 9
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 229910052790 beryllium Inorganic materials 0.000 claims description 5
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
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- 238000000465 moulding Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000000691 measurement method Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to a kind of fiber-optic grating sensors and application for hull rolling and pitching measurement, specifically include that sensor seal cover, sensor housing, sensor internal structure.Wherein external shell is process by the aluminium alloy of a monolith, and inside is made of beryllium-bronze hinge arrangement, fiber grating, beryllium-bronze mass block etc..Sensor seal cover is surrounded by sealed groove and sealing strip, and side is equipped with optical fiber waterproof aviation plug connector.This makes sensor have anti-interference, wet-heat resisting, on-deformable characteristic, can be used in especially severe use environment.The sensor can dynamically measure hull and eliminate the influence of temperature on fiber grating because of attitude angle caused by rolling, pitching, while because its is compact-sized, suitable for ship structure safety monitoring.
Description
Technical field
The invention belongs to Fiber Grating Sensors Technology fields, measure hull rolling, pitching more particularly to a kind of dynamic
The fiber grating attitude angle transducer of movement and application.
Background technique
In transport facility, ship has useful load big, the advantages such as expense is low, however hull is across the sea often
It is influenced by wind, wave, stream, and then the movement of meeting generating period rolling, pitching and yawing.Ship also can be due to these movements
It generates stall under Same Efficieney, seriously damage Ship Structure and the negative consequences such as crewman is seasick.Therefore, if can monitor in time
These movements of hull, will certainly enhance ship anti-disaster ability, improve whole security performance.
Fiber grating has good anti-electromagnetic interference capability and electrical isolation as the important component of fibre optical sensor
Property.For the wavelength value of optical fiber not by the influence of fluctuations of light source power, the grating of multiple and different wavelength can also be serially connected in same root optical fiber
On.Optical fiber itself is resistant to chemical etching, stable physical property, while volume is small plastic, therefore fibre optical sensor is suitable in sea
It is used in the foreign such adverse circumstances of ship.
Naval vessel be generally in it is more it is moist, vibrate and there are in the rugged environment of corrosive substance, which increase to electricity more
The requirement of sub- apparatus performance, traditional civilian, commercial device are no longer satisfied requirement.The utility model fiber-optic grating sensor
It overcomes the shortage of prior art, the dynamic monitoring of ship body attitude angle variation is realized, to provide for the policymaker on ship true and reliable
Data, extend the service life of ship, and slow down crewman because hull fluctuation caused by it is uncomfortable.
Summary of the invention
It is a kind of suitable for marine ship rolling and vertical it is an object of the invention to provide in place of overcome the deficiencies in the prior art
The sensor of motion measurement is shaken, to realize the dynamic monitoring of ship body attitude angle variation in the presence of a harsh environment.
The present invention solves above-mentioned technical problem, by adopting the following technical solutions to achieve:
A kind of fiber-optic grating sensor for hull rolling and pitching measurement, it is characterised in that it specifically includes that sensing
Device sealing cover 1, sensor housing 9, sensor internal structure；Wherein sensor seal cover is surrounded by sealed groove 12, and
The nested installation sealing strip in sealed groove, is equipped with threaded sealing cover fixation hole 13 in sensor seal cover, passes through fixed spiral shell
Silk 2 is sealed with sensor housing 9, and the side of sensor housing 9 is equipped with air plug interface 4 and four air plug fixation holes 11, is led to
Screw is crossed to fix optical fiber waterproof aviation plug 3, passes through beryllium-bronze hinge arrangement 10 between sensor housing 9 and sensor internal structure
On through-hole and fixed screw 2 it is fixed.
Sensor internal structure includes beryllium-bronze hinge arrangement 10, fiber grating 5, beryllium-bronze mass block 6；Wherein beryllium-bronze
Hinge arrangement 10 and beryllium-bronze mass block 6 are an integral molding structure, and beryllium-bronze hinge arrangement 10 is differential symmetry structure, optical fiber
Grating 5 pastes the two sides for being attached to beryllium-bronze mass block 6 and beryllium-bronze hinge arrangement 10, internal light by epoxide-resin glue 7
Fine grating 5 and external optical fiber waterproof aviation plug 3 are connected by the optical fiber pigtail 8 in left side, and the optical fiber pigtail 8 on right side uses mackintosh
It is fixed on beryllium-bronze hinge arrangement 10.
The variation that the attitude angle of hull is represented with the variation of the fiber bragg grating center wavelength of (FBG) demodulator real-time display, when
When hull constantly changes because of attitude angle locating for rolling, pitching, the variation base of ship body attitude angle and fiber bragg grating center wavelength
The relationship of this presentation SIN function, by the backoff algorithm at (FBG) demodulator end, it is final obtain fiber optic hub wavelength and ship rolling with
Relationship between the variation of attitude angle produced by pitching.
Fiber-optic grating sensor of the present invention for hull rolling and pitching measurement, external sensor shell
Body be by a monolith aluminium alloy by cutting, polishing, oxidation and etc. be process, without splicing welding process.
The sensors sides are equipped with the air plug fixation hole that air plug interface and four diameters are 3mm, for fixing optical fiber
Waterproof aviation plug extends the service life of sensor to promote the resistance to corrosion of sensor.Inside the sensor seal cover
It is surrounded by sealed groove, and the nested installation sealing strip in sealed groove, for ensure that the sealing performance of sensor and resist
Jamming performance.
Sensor internal structure includes three beryllium-bronze hinge arrangement, fiber grating, beryllium-bronze mass block parts.Wherein beryllium
Bronze hinge arrangement is differential symmetry hinge arrangement, and the use of differential configuration can greatly enhance the sensitivity of sensor, is promoted
The range of the rolling of sensor measurement hull and pitching.Beryllium-bronze hinge arrangement and beryllium-bronze mass block are integrally formed knot
Structure, comparison fixed structure can be lost to avoid bring is used for a long time and maintenance problem.Sensor internal main body uses beryllium-bronze
Material has many advantages, such as high intensity, elastic limit height, corrosion resistance and fatigue durability, is suitably employed on hull sensor.Optical fiber
Grating is sensing element, cooperates beryllium-bronze hinge arrangement and beryllium-bronze mass block, can dynamically measure hull because of rolling, pitching institute
The attitude angle of generation.It is socketed the connecting tube of polytetrafluoroethylene (PTFE) material at exposed fiber grating and tail optical fiber, plays the role of waterproof
Meanwhile sensor damage caused by optical fiber for a long time on hull can be slowed down.
The present invention further discloses the users of the fiber-optic grating sensor for hull rolling and pitching measurement
Method, it is characterised in that:
(1) connector of optical fiber waterproof aviation plug tail portion is connected first with (FBG) demodulator, then connects (FBG) demodulator and computer with cable
Between, the included backoff algorithm of demodulation software can be with dynamic monitoring to the central wavelength of sensor internal fiber grating；
(2) when hull is because of attitude angle caused by rolling, pitching, due to being influenced by gravity factor, sensor internal knot
Beryllium-bronze mass block 6 in structure changes to active force caused by beryllium-bronze hinge arrangement 10, is fixed on the left and right sides
Fiber grating 5 distinguishes the effect of under tension and pressure and generates deformation, becomes so as to cause the central wavelength of fiber grating
Change；
(3) variation that the attitude angle of hull is represented with the variation of the fiber bragg grating center wavelength of (FBG) demodulator real-time display, when
When hull constantly changes because of attitude angle locating for rolling, pitching, the variation base of ship body attitude angle and fiber bragg grating center wavelength
The relationship of this presentation SIN function, by the backoff algorithm at (FBG) demodulator end, it is final obtain fiber optic hub wavelength and ship rolling with
Relationship between the variation of attitude angle produced by pitching.
The present invention further discloses the fiber-optic grating sensor user for hull rolling and pitching measurement
Application of the method in terms of the dynamic monitoring changed for ship body attitude angle.Experimental result is shown: when hull is because locating for rolling, pitching
When attitude angle constantly changes, the measurement range of the sensor is -90 ° ~ 90 °, cardiac wave in ship body attitude angle and fiber grating
The basic relationship that SIN function is presented of long variation, the degree of fitting of curve can achieve 99.93% by calculating.
Present invention mainly solves how dynamic monitoring hull is because of attitude angle caused by rolling, pitching, emphasis is examined
Sensor has been examined in especially severe use environment, how there is good sealing performance and interference free performance, main difficulty
Point is to eliminate influence of the temperature to hull rolling and pitching measurement using mechanical compensation method.
The fiber-optic grating sensor disclosed by the invention measured for hull rolling and pitching is compared with prior art
It is possessed to have the active effect that
(1) sensor can be with dynamic monitoring hull because of attitude angle caused by rolling, pitching；
(2) sensor once encapsulates completion, and the variable quantity of fiber bragg grating center wavelength will not be affected by temperature；
(3) sensor has anti-interference, wet-heat resisting, on-deformable characteristic, can be used in especially severe use environment.
Detailed description of the invention
Fig. 1 is the schematic diagram of internal structure of inventive sensor；
Fig. 2 is the side schematic view of inventive sensor；
Fig. 3 is inventive sensor sealing cover schematic internal view；
Fig. 4 is attitude angle locating for inventive sensor and fiber bragg grating center wavelength variation diagram；
Each label in figure:
1 sensor seal cover, 2 fixed screws, 3 optical fiber waterproof aviation plugs,
4 air plug interfaces, 5 fiber gratings, 6 beryllium-bronze mass blocks,
7 epoxide-resin glues, 8 optical fiber pigtails, 9 sensor housings
10 beryllium-bronze hinge arrangements, 11 air plug fixation holes, 12 sealed grooves,
13 sealing cover fixation holes.
Specific embodiment
The present invention is described below by specific embodiment.Unless stated otherwise, technological means used in the present invention
It is method known in those skilled in the art.In addition, embodiment is interpreted as illustrative, it is not intended to limit the present invention
Range, the spirit and scope of the invention are limited only by the claims that follow.To those skilled in the art, without departing substantially from this
Under the premise of invention spirit and scope, to the various changes or change of material component and dosage progress in these embodiments
It belongs to the scope of protection of the present invention.The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Embodiment 1
Fiber-optic grating sensor for hull rolling and pitching measurement, it is characterised in that it specifically includes that sensor is close
Cover 1, sensor housing 9, sensor internal structure；Wherein sensor seal cover is surrounded by sealed groove 12, and close
Seal nested installation sealing strip in groove, be equipped with threaded sealing cover fixation hole 13 in sensor seal cover, by fixed screw 2 with
Sensor housing 9 is sealed, and the side of sensor housing 9 is equipped with air plug interface 4 and four air plug fixation holes 11, passes through screw
Optical fiber waterproof aviation plug 3 is fixed, by logical on beryllium-bronze hinge arrangement 10 between sensor housing 9 and sensor internal structure
Hole and fixed screw 2 are fixed.
Sensor internal structure includes: beryllium-bronze hinge arrangement 10, fiber grating 5, beryllium-bronze mass block 6；Wherein beryllium is green
Copper hinge arrangement 10 and beryllium-bronze mass block 6 are an integral molding structure, and beryllium-bronze hinge arrangement 10 is differential symmetry structure, light
Fine grating 5 pastes the two sides for being attached to beryllium-bronze mass block 6 and beryllium-bronze hinge arrangement 10 by epoxide-resin glue 7, internal
Fiber grating 5 and external optical fiber waterproof aviation plug 3 are connected by the optical fiber pigtail 8 in left side, and the optical fiber pigtail 8 on right side uses marine glue
Cloth is fixed on beryllium-bronze hinge arrangement 10.
Embodiment 2
Fig. 1 is the schematic diagram of internal structure of inventive sensor, including sensor seal cover 1, fixed screw 2, optical fiber waterproof boat
It is green to insert 3, air plug interface 4, fiber grating 5, beryllium-bronze mass block 6, epoxide-resin glue 7, optical fiber pigtail 8, sensor housing 9, beryllium
Copper hinge arrangement 10.The sensor seal cover 1 is formed with common aluminium product, by fixed screw 2 and sensor housing 9 into
Row sealing.The fixed screw 2 is stainless steel material screw, plays fixed function in the sensor.The optical fiber waterproof aviation plug 3
For common stainless steel optical fiber watertight flange on the market, the air plug interface 4 is the through-hole that sensor housing lateral diameters are 16mm.
The fiber grating 5 is two single grating fibers, and fiber grating is sensing element, cooperates beryllium-bronze hinge arrangement 10 and beryllium-bronze
Mass block 6 can dynamically measure hull because of attitude angle caused by rolling, pitching, and the optical fiber for choosing two monochromatic light grid can be
Eliminate the sensitivity that sensor is promoted while temperature influence.The beryllium-bronze mass block 6 is the cube of beryllium-bronze material, beryllium
Bronze hinge arrangement 10 and beryllium-bronze mass block 6 are an integral molding structure, and sensor internal main body uses beryllium-bronze material, are had
It the advantages that intensity height, elastic limit height, corrosion resistance and fatigue durability, is suitably employed on hull sensor.The epoxy resin
Glue 7 is the common all-transparent epoxide resin AB glue in market, for fine grating 5 is attached to beryllium blueness by the stickup of epoxide-resin glue 7
The two sides of copper gauge block 6 and beryllium-bronze hinge arrangement 10.
The optical fiber pigtail 8 is the connector of optical fiber tail portion, and the optical fiber pigtail 8 in left side connects internal fiber grating 5 and outer
The optical fiber pigtail 8 of the optical fiber waterproof aviation plug 3 in portion, right side is fixed on beryllium-bronze hinge arrangement 10 with mackintosh, to prevent the later period
Maintenance uses, and the connecting tube of polytetrafluoroethylene (PTFE) material is socketed at exposed fiber grating and tail optical fiber, plays the role of waterproof simultaneously,
Sensor damage caused by optical fiber for a long time on hull can be slowed down.
The sensor housing 9 be by a monolith aluminium alloy by cutting, polishing, oxidation and etc. be process, not
By the process of splicing welding.
The beryllium-bronze hinge arrangement 10 is differential symmetry hinge arrangement, and the use of differential configuration can greatly enhance sensing
The sensitivity of device promotes the range of the rolling of sensor measurement hull and pitching.
Fig. 2 is the side schematic view of inventive sensor, including air plug interface 4 and air plug fixation hole 11.The sensing
Device side is equipped with the air plug fixation hole that air plug interface and four diameters are 3mm, for fixing optical fiber waterproof aviation plug, to promote sensing
The resistance to corrosion of device extends the service life of sensor.
Fig. 3 is inventive sensor sealing cover schematic internal view, including sealed groove 12 and sealing cover fixation hole 13.Institute
That states sensor seal cover is surrounded by sealed groove 12, and the nested installation sealing strip in sealed groove.The sealing cover is solid
Determine the tapped through hole that hole 13 is diameter 3mm in sensor seal cover, by the fixed screw 2 do not deviate from and sensor housing 9 into
Row sealing.
Fig. 4 is attitude angle locating for inventive sensor and fiber bragg grating center wavelength variation diagram wherein fiber grating difference
Rear center's wavelength value is that fiber bragg grating center wavelength value in right side subtracts left side fiber bragg grating center wavelength value., it is apparent that should
The measurement range of sensor is -90 ° ~ 90 °, and after the fiber grating difference of left and right, the degree of fitting of curve is obviously improved, can by calculating
To reach 99.93%.The sensitivity of sensor also greatly improves, with total variation of fiber bragg grating center wavelength divided by attitude angle
Total variation, can calculate the sensitivity of the sensor is 27.95pm/1 °.
Embodiment 3
Influence of the temperature to hull rolling and pitching measurement is eliminated using mechanical compensation method, uses two identical optical fiber light
Then grid are respectively adhered on two opposites that strain variation occurs, two fiber gratings are respectively by stretching strain and pressure
Strain.If the central wavelength of fiber grating is respectivelyThen the variation of the central wavelength of two fiber gratings is respectively as follows:
In formula:Sensitivity coefficient for fiber grating about strain,Sensitivity coefficient for fiber grating about temperature.
It is all pasted due to the two sides of two fiber gratings and is attached to the two sides of beryllium-bronze mass block and beryllium-bronze hinge arrangement,
When hull is because of attitude angle caused by rolling, pitching, it necessarily will drive fiber grating and strain variation occur, wherein an optical fiber
Grating will receive stretching strain, and other one then by compressive strain, and the order of magnitude of the strain of the two is equal, direction phase
Instead, i.e.,And the two is under same environment, thereforeTherefore it can obtain:
Sensor once encapsulates completion, and fiber bragg grating center wavelength variable quantity will not be affected by temperature, only with hull rolling and indulge
It is related to shake the caused strain wavelength shift of movement, to realize the fiber-optic grating sensor of temperature self-compensation.
Sensor application method includes:
(1) connector of optical fiber waterproof aviation plug tail portion is connected first with (FBG) demodulator, then connects (FBG) demodulator and computer with cable
Between, the included backoff algorithm of demodulation software can be with dynamic monitoring to the central wavelength of sensor internal fiber grating；
(2) when hull is because of attitude angle caused by rolling, pitching, due to being influenced by gravity factor, sensor internal knot
Beryllium-bronze mass block 6 in structure changes to active force caused by beryllium-bronze hinge arrangement 10, is fixed on the left and right sides
Fiber grating 5 distinguishes the effect of under tension and pressure and generates deformation, becomes so as to cause the central wavelength of fiber grating
Change；
(3) variation that the attitude angle of hull is represented with the variation of the fiber bragg grating center wavelength of (FBG) demodulator real-time display, when
When hull constantly changes because of attitude angle locating for rolling, pitching, the variation base of ship body attitude angle and fiber bragg grating center wavelength
The relationship of this presentation SIN function, by the backoff algorithm at (FBG) demodulator end, it is final obtain fiber optic hub wavelength and ship rolling with
Relationship between the variation of attitude angle produced by pitching.
Claims (7)
1. a kind of fiber-optic grating sensor for hull rolling and pitching measurement, it is characterised in that it specifically includes that biography
Sensor sealing cover (1), sensor housing (9), sensor internal structure；
Wherein sensor seal cover (1) is surrounded by sealed groove (12) and the nested installation sealing strip in sealed groove,
Sensor seal cover is equipped with threaded sealing cover fixation hole (13), close by fixed screw (2) and sensor housing (9) progress
The side of envelope, sensor housing is equipped with air plug interface (4) and four air plug fixation holes (11), and optical fiber waterproof is fixed by screw
Air plug (3) passes through the through-hole and fixed spiral shell on beryllium-bronze hinge arrangement (10) between sensor housing and sensor internal structure
Silk (2) is fixed；
The sensor internal structure includes beryllium-bronze hinge arrangement (10), fiber grating (5), beryllium-bronze mass block (6)；Its
Middle beryllium-bronze hinge arrangement (10) and beryllium-bronze mass block (6) are an integral molding structure and beryllium-bronze hinge arrangement is differential symmetry
Structure, fiber grating (5) is pasted by epoxide-resin glue (7) is attached to beryllium-bronze mass block (6) and beryllium-bronze hinge arrangement
The optical fiber waterproof aviation plug (3) of two sides, internal fiber grating (5) and outside is connected by the optical fiber pigtail (8) in left side, right side
Optical fiber pigtail is fixed on beryllium-bronze hinge arrangement (10) with mackintosh.
2. the fiber-optic grating sensor according to claim 1 for hull rolling and pitching measurement, feature exist
In: the fiber grating (5) in the sensor internal structure is sensing element, cooperates beryllium-bronze hinge arrangement (10) and beryllium green
Copper gauge block (6), dynamic measure hull because of attitude angle caused by rolling, pitching.
3. the fiber-optic grating sensor according to claim 1 for hull rolling and pitching measurement, feature exist
In: the sensor housing (9) is by a monolith aluminium alloy one-pass molding.
4. the fiber-optic grating sensor according to claim 1 for hull rolling and pitching measurement, feature exist
In: the sensors sides use optical fiber waterproof aviation plug (3) connector, promote the corrosion resistance ability of sensor, extend and pass
The service life of sensor.
5. the fiber-optic grating sensor according to claim 1 for hull rolling and pitching measurement, feature exist
In: the sensor seal cover is surrounded by sealed groove (12), and the nested installation sealing strip in sealed groove, is used to
Guarantee the sealing performance and interference free performance of sensor.
6. the user of the fiber-optic grating sensor according to claim 1 for hull rolling and pitching measurement
Method, it is characterised in that:
(1) connector of optical fiber waterproof aviation plug tail portion is connected first with (FBG) demodulator, then connects (FBG) demodulator and computer with cable
Between, the included backoff algorithm of demodulation software can be with dynamic monitoring to the central wavelength of sensor internal fiber grating；
(2) when hull is because of attitude angle caused by rolling, pitching, due to being influenced by gravity factor, sensor internal knot
Beryllium-bronze mass block (6) in structure changes to active force caused by beryllium-bronze hinge arrangement (10), is fixed on left and right two
The fiber grating (5) of side respectively the effect of under tension and pressure and generate deformation, so as to cause the central wavelength of fiber grating
It changes；
(3) variation that the attitude angle of hull is represented with the variation of the fiber bragg grating center wavelength of (FBG) demodulator real-time display, when
When hull constantly changes because of attitude angle locating for rolling, pitching, the variation base of ship body attitude angle and fiber bragg grating center wavelength
The relationship of this presentation SIN function, by the backoff algorithm at (FBG) demodulator end, it is final obtain fiber optic hub wavelength and ship rolling with
Relationship between the variation of attitude angle produced by pitching.
7. the fiber-optic grating sensor application method as claimed in claim 6 measured for hull rolling with pitching is being used for
Application in terms of the dynamic monitoring of ship body attitude angle variation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910125138.7A CN109682348A (en) | 2019-02-20 | 2019-02-20 | Fiber-optic grating sensor and application for hull rolling and pitching measurement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910125138.7A CN109682348A (en) | 2019-02-20 | 2019-02-20 | Fiber-optic grating sensor and application for hull rolling and pitching measurement |
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| CN109682348A true CN109682348A (en) | 2019-04-26 |
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| CN201910125138.7A Pending CN109682348A (en) | 2019-02-20 | 2019-02-20 | Fiber-optic grating sensor and application for hull rolling and pitching measurement |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061583A (en) * | 2018-06-26 | 2018-12-21 | 中国卫星海上测控部 | A kind of boat-carrying Large Radar pedestal vertical section deformation measurement method |
| CN110108901A (en) * | 2019-06-17 | 2019-08-09 | 天津师范大学 | Accelerate fiber grating acceleration sensor and the application of monitoring for hull |
| 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 |
| CN114217092A (en) * | 2021-12-15 | 2022-03-22 | 武汉理工大学 | FBG acceleration sensor based on diaphragm and elliptical hinge |
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| 梁磊;李东旭;仇磊;徐刚;: "一种基于柔性铰链的FBG加速度传感器", 光电子・激光 * |
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| CN109061583A (en) * | 2018-06-26 | 2018-12-21 | 中国卫星海上测控部 | A kind of boat-carrying Large Radar pedestal vertical section deformation measurement method |
| CN109061583B (en) * | 2018-06-26 | 2020-05-19 | 中国卫星海上测控部 | Deformation measurement method for vertical section of shipborne large radar base |
| CN110108901A (en) * | 2019-06-17 | 2019-08-09 | 天津师范大学 | Accelerate fiber grating acceleration sensor and the application of monitoring for hull |
| 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 |
| CN114217092A (en) * | 2021-12-15 | 2022-03-22 | 武汉理工大学 | FBG acceleration sensor based on diaphragm and elliptical hinge |
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Application publication date: 20190426 |