CN109682523A - Optical fibre grating acceleration sensor and application for the measurement of stem slamming load - Google Patents
Optical fibre grating acceleration sensor and application for the measurement of stem slamming load Download PDFInfo
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- CN109682523A CN109682523A CN201910124613.9A CN201910124613A CN109682523A CN 109682523 A CN109682523 A CN 109682523A CN 201910124613 A CN201910124613 A CN 201910124613A CN 109682523 A CN109682523 A CN 109682523A
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- 230000001133 acceleration Effects 0.000 title claims abstract description 38
- 239000013307 optical fiber Substances 0.000 title claims abstract description 33
- 238000005259 measurement Methods 0.000 title claims abstract description 22
- 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 abstract description 14
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 7
- 230000035945 sensitivity Effects 0.000 claims description 6
- 229910000906 Bronze Inorganic materials 0.000 claims description 4
- 239000010974 bronze Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
- 240000002853 Nelumbo nucifera Species 0.000 claims 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims 1
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 239000003822 epoxy resin Substances 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 229920000647 polyepoxide Polymers 0.000 claims 1
- 239000000835 fiber Substances 0.000 abstract description 13
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
- G01L1/246—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using integrated gratings, e.g. Bragg gratings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention relates to a kind of optical fibre grating acceleration sensor for the measurement of stem slamming load and applications, are mainly made of sensor outer housing, sensor outer housing lid, acceleration transducer Sensitive Apparatus, hinge arrangement etc..Two grating regions of prestretching fiber grating are respectively adhered between mass block and the top and bottom of pedestal using epobond epoxyn, by watertight flanged joint to transmission cable, the stem slamming load amount of Ship Structure is shown in the form of the wavelength change of fiber grating at (FBG) demodulator end.The present invention improves the watertightness and stability of system, can be used in severe use environment using aluminium alloy structure shell and casing cover is integrally formed.The sensor can dynamically measure stem slamming load amount, eliminate the influence of temperature on fiber grating, ensure that reliability and durability that sensor is applied in marine field.
Description
Technical field
The invention belongs to Fiber Grating Sensors Technology fields, are related to the measurement of marine ship structure stem slamming load.More
Specifically a kind of optical fibre grating acceleration sensor and application for the measurement of stem slamming load.
Background technique
In high speed operation under disliking condition, ship can be moved substantially ship, and hull bottom can expose the surface, when it is back into water,
Fierce impact can be generated with wave slamming phenomenon occurs in regions such as stem bottom, stern and flares.Instantaneous, the bottom in slamming
Portion is followed hard on by huge impact force, the vertical acceleration meeting sudden change of hull and high-frequency vibration occurs.Strong slamming
It can cause a series of serious consequences, more ship damage reports prove that this fluid impact load of slamming is to lead to ship both at home and abroad
Under body Water Plane the main reason for partial structurtes failure, shipbreaking.Therefore in the Ship Design of high speed, slamming load conduct
Main Load, should be using intensity of the check Ship Structure under load effect as one of Ship Design safety standard.
Optical fibre grating acceleration sensor for the measurement of stem slamming load is that acceleration is arranged in Ship Structure to pass
Sensor realizes the automatic monitoring of Ship Structure stem slamming load amount, true and reliable data is provided for policymaker on ship, to protect
It demonstrate,proves hull and scientific basis is provided safely, improve security performance.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of optical fiber light for the measurement of stem slamming load
Grid acceleration transducer design, using this design stem slamming load measure optical fibre grating acceleration sensor have compared with
The real-time monitoring of Ship Structure stem slamming load amount is realized in good frequency response and higher sensitivity.
The present invention to achieve the goals above, adopts the following technical scheme that:
A kind of optical fibre grating acceleration sensor for the measurement of stem slamming load, it is characterised in that the sensing system
It include: sensor outer housing 3, sensor outer housing lid 7, acceleration transducer Sensitive Apparatus, hinge arrangement.
Wherein sensor outer housing 3 be by aluminium alloy by cutting, polishing, oxidation and etc. be process, without splicing
The side of the process of welding, sensor outer housing 3 is equipped with watertight flange 2.Sensor outer housing lid 7 is surrounded by sealed groove, and
The nested installation sealing strip in sealed groove, is equipped with threaded fixation hole 6 in sensor outer housing lid 7, by fixed screw and passes
Sensor shell 3 is sealed.
Acceleration transducer Sensitive Apparatus is by the pre- of two wavelength different the first grating 4 and the second grating 8 of connecting
The optical fiber 1 and temperature-compensating grating 10 for stretching 2mm are constituted.Two grating regions of fiber grating use epobond epoxyn point
It is not pasted between mass block 5 and the top and bottom of pedestal 9, transmission cable is connected to by watertight flange 2.
The hinge arrangement is differential symmetry hinge arrangement, it is made of a monolith beryllium-bronze, by linear incision and
Processing, is an overall model.Including pedestal 9, pedestal fixation hole 11, flexible hinge 12, mass block 5.Mass block 5 passes through
Flexible hinge 12 is connect with pedestal 9, and pedestal 9 is directly connected to sensor outer housing 3.
A kind of optical fibre grating acceleration sensor for the measurement of stem slamming load of the present invention is characterized in that:
(1) optical fibre grating acceleration sensor for the measurement of stem slamming load is to be fixed on ship by sensor outer housing 3,
To measure the stem slamming load amount of hull.
(2) transducer body portions such as acceleration transducer Sensitive Apparatus and hinge arrangement are by sensor outer housing lid 7, sensing
The sealing device institute seal protection that device shell 3 forms, improves the watertightness and anti-destructive of sensing system, guarantees the optical fiber
The stable work of grating acceleration transducer.
The present invention further discloses a kind of making for optical fibre grating acceleration sensor for the measurement of stem slamming load
With method, it is characterised in that:
(1) sensor being sealed is fixed on to the stem position of hull, the optical fiber of sensor internal is drawn by watertight flange 2
Out, it is connected to the transmission cable of hull, can finally observe the stem slamming load amount of Ship Structure in real time at (FBG) demodulator end.
(2) sensor improves the watertightness and stability of system using aluminium alloy structure and sealing cover is integrally formed.Water
The use of close flange 2 can promote the corrosion resistance of sensor, and reducing short interruption, there is a situation where improve the measurement of system
Precision is convenient for later maintenance.
More detailed description of the present invention is as follows:
Acceleration transducer Sensitive Apparatus by different first grating 4 and the second grating 8 of two wavelength of connecting pre-stretching
The optical fiber 1 and temperature-compensating grating 10 of 2mm is constituted.Two grating regions of fiber grating are glued respectively using epobond epoxyn
It is attached between mass block 5 and the top and bottom of pedestal 9, transmission cable is connected to by watertight flange 2.The deformation of fiber grating with
The wavelength change of fiber grating is substantially linear relationship, by the backoff algorithm at (FBG) demodulator end, obtains wavelength and Ship Structure
Acceleration value between be to change in ratio, the stem slamming load amount of final Ship Structure is with the wavelength change of fiber grating
Form shown at (FBG) demodulator end.
Sensor outer housing lid 7 is surrounded by sealed groove, and the nested installation sealing strip in sealed groove, in sensor
Casing cover 7 is equipped with threaded fixation hole 6, is sealed by fixed screw and sensor outer housing 3.Improve the watertightness of system
And stability.
The present invention further discloses the use of the optical fibre grating acceleration sensor for the measurement of stem slamming load
Application of the method in terms of for stem slamming load amount automatically monitoring.Experimental result show the sensor frequency be 0-100
Sensitivity within the scope of Hz is 284 pm/g.
The optical fibre grating acceleration sensor disclosed by the invention measured for stem slamming load and application and existing skill
Art has the active effect that compared to possessed
(1) the optical fibre grating acceleration sensor design measured for the stem slamming load of Ship Structure, works for hull
Environmental requirement has good watertightness, preferable frequency response, higher sensitivity.
(2) for poor working conditions such as ocean humidity, surges, the present invention utilizes aluminium alloy structure shell and casing cover,
It ensure that the durability and reliability that the optical fibre grating acceleration sensor of stem slamming load measurement is applied in marine field.
Detailed description of the invention
Fig. 1 is that the optical fibre grating acceleration sensor structure that the present invention is measured for the stem slamming load of Ship Structure is shown
It is intended to；
Fig. 2 is the frequency response for the optical fibre grating acceleration sensor that the present invention is measured for the stem slamming load of Ship Structure
Curve；
In figure: 1-optical fiber, 2-watertight flanges, 3-sensor outer housings, the 4-the first grating, 5-mass blocks, 6-casing covers are solid
Determine hole, 7-casing covers, the 8-the second grating, 9-pedestals, 10-temperature-compensating gratings, 11-pedestal fixation holes, 12-hinges.
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
The optical fibre grating acceleration sensor that stem slamming load for Ship Structure measures, it is characterised in that the sensing
Device includes: sensor outer housing 3, sensor outer housing lid 7, acceleration transducer Sensitive Apparatus, hinge arrangement.Wherein sensor outer housing
3 be by aluminium alloy by cutting, polishing, oxidation and etc. disposably be process, without splicing weld process, sensor
The side of shell 3 is equipped with watertight flange 2.Sensor outer housing lid 7 is surrounded by sealed groove, and the nested peace in sealed groove
Sealing strip is filled, threaded fixation hole 6 is equipped in sensor outer housing lid 7, is sealed by fixed screw and sensor outer housing 3.
Acceleration transducer Sensitive Apparatus is by the pre- of two wavelength different the first grating 4 and the second grating 8 of connecting
The optical fiber 1 and temperature-compensating grating 10 for stretching 2mm are constituted.Two grating regions of fiber grating use epobond epoxyn point
It is not pasted between mass block 5 and the top and bottom of pedestal 9, transmission cable is connected to by watertight flange 2.
The hinge arrangement is differential symmetry hinge arrangement, it is made of a monolith beryllium-bronze, by linear incision and
Processing, is an overall model.The use of differential configuration can greatly enhance the sensitivity of sensor, promote sensor measurement ship
The range of bow slamming load amount.
Embodiment 2
Application method includes:
(1) sensor being sealed is fixed on to the stem position of hull, the optical fiber of sensor internal is drawn by watertight flange 2
Out, it is connected to the transmission cable of hull, can finally observe the stem slamming load amount of Ship Structure in real time at (FBG) demodulator end.
(2) sensor improves the watertightness and stability of system using aluminium alloy structure and sealing cover is integrally formed.Water
The use of close flange 2 can promote the corrosion resistance of sensor, and reducing short interruption, there is a situation where improve the measurement of system
Precision is convenient for later maintenance.
The stem slamming load amount of Ship Structure shows in the form of the wavelength change of fiber grating at (FBG) demodulator end, optical fiber
The deformation of grating and the wavelength change of fiber grating are substantially linear relationship, by the backoff algorithm at (FBG) demodulator end, are finally obtained
Obtain the stem slamming load magnitude of wavelength and Ship Structure.
Embodiment 3
The influence that temperature measures ship stem slamming load is eliminated using reference grating method, with the grating of a not strained effect
It realizes temperature measurement, is fused to acceleration transducer Sensitive Apparatus, be placed in sensor.Sensor has once encapsulated
At fiber bragg grating center wavelength variable quantity will not be affected by temperature, and be answered caused by the impact only generated with stem by wave
It is related to become wavelength shift, to realize the fiber-optic grating sensor of temperature self-compensation.
As a result illustrate: can be obtained after calculating the sensor frequency be sensitivity within the scope of 0-100 Hz be 284 pm/
g。
Claims (5)
1. a kind of optical fibre grating acceleration sensor for the measurement of stem slamming load, it is characterised in that it includes: sensor
Shell (3), sensor outer housing lid (7), acceleration transducer Sensitive Apparatus, hinge arrangement；
Wherein sensor outer housing (3) is by aluminium alloy one-pass molding, and the side of sensor outer housing is equipped with watertight flange (2), sensing
Device casing cover (7) is surrounded by sealed groove, and the nested installation sealing strip in sealed groove, sensor outer housing are covered with band
Threaded securing bores (6) are sealed by fixed screw and sensor outer housing (3)；
The acceleration transducer Sensitive Apparatus is by connect two wavelength different first grating (4) and the second grating
(8) optical fiber (1) and temperature-compensating grating (10) of pre-stretching 2mm is constituted, and two grating regions of grating use epoxy resin
Adhesive is respectively adhered between mass block (5) and the top and bottom of pedestal (9), is connected to transmission light by watertight flange (2)
Cable；
The hinge arrangement is differential symmetry hinge arrangement, by overall model of a monolith beryllium-bronze；Including pedestal
(9), pedestal fixation hole (11), flexible hinge (12), mass block (5)；Mass block (5) passes through flexible hinge (12) and pedestal (9)
Connection, pedestal are directly connected to sensor outer housing (3)；The hinge arrangement is differential symmetry hinge arrangement, it is by a monolith
Beryllium-bronze is made, and is an overall model by linear incision and processing, the use of differential configuration can greatly enhance sensor
Sensitivity, promoted sensor measurement stem slamming load amount range.
2. a kind of optical fibre grating acceleration sensor for the measurement of stem slamming load according to claim 1, special
Sign is the acceleration transducer Sensitive Apparatus, cooperates hinge arrangement, can dynamically measure hull stem slamming load amount.
3. a kind of optical fibre grating acceleration sensor for the measurement of stem slamming load according to claim 1, special
Sign is that the sensor outer housing (3) is disposably to be process by aluminium alloy by cutting, polishing, oxidation step.
4. a kind of use of optical fibre grating acceleration sensor for the measurement of stem slamming load according to claim 1
Method, it is characterised in that: the sensor being sealed is fixed on to the stem position of hull, the optical fiber of sensor internal passes through watertight
Flange 2 is drawn, and the transmission cable of hull is connected to, and is finally carried in the stem slamming that (FBG) demodulator end can observe Ship Structure in real time
Lotus amount.
5. it is as claimed in claim 4 for stem slamming load measurement optical fibre grating acceleration sensor application method with
The application of aspect is monitored automatically in stem slamming load amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910124613.9A CN109682523A (en) | 2019-02-20 | 2019-02-20 | Optical fibre grating acceleration sensor and application for the measurement of stem slamming load |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910124613.9A CN109682523A (en) | 2019-02-20 | 2019-02-20 | Optical fibre grating acceleration sensor and application for the measurement of stem slamming load |
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| CN109682523A true CN109682523A (en) | 2019-04-26 |
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| CN201910124613.9A Pending CN109682523A (en) | 2019-02-20 | 2019-02-20 | Optical fibre grating acceleration sensor and application for the measurement of stem slamming load |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111076854A (en) * | 2020-02-24 | 2020-04-28 | 天津师范大学 | Fiber bragg grating sensor for monitoring pressure of hull structure under action of wave load and application |
| CN111595552A (en) * | 2020-05-28 | 2020-08-28 | 中国船舶科学研究中心 | Novel measuring device for wave load ship model test slamming and upwelling load |
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| WO2017175921A1 (en) * | 2016-04-06 | 2017-10-12 | 한국해양과학기술원 | Device for measuring slamming load on ship for model testing |
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| CN102288162A (en) * | 2011-05-23 | 2011-12-21 | 南京航空航天大学 | Tilt angle sensor based on optical fiber Bragg gratings and method for measuring tilt angle of tilt angle sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN111076854A (en) * | 2020-02-24 | 2020-04-28 | 天津师范大学 | Fiber bragg grating sensor for monitoring pressure of hull structure under action of wave load and application |
| CN111076854B (en) * | 2020-02-24 | 2024-06-11 | 天津师范大学 | Fiber bragg grating sensor for monitoring pressure of ship structure under wave load and application |
| CN111595552A (en) * | 2020-05-28 | 2020-08-28 | 中国船舶科学研究中心 | Novel measuring device for wave load ship model test slamming and upwelling load |
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