CN106918295B - A kind of fiber-optic grating sensor and its measurement method of the deformation of measurement arc component - Google Patents
A kind of fiber-optic grating sensor and its measurement method of the deformation of measurement arc component Download PDFInfo
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- CN106918295B CN106918295B CN201710165175.1A CN201710165175A CN106918295B CN 106918295 B CN106918295 B CN 106918295B CN 201710165175 A CN201710165175 A CN 201710165175A CN 106918295 B CN106918295 B CN 106918295B
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- fiber
- grating sensor
- optic grating
- measurement
- deformation
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- 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
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
Abstract
The invention discloses the fiber-optic grating sensor and its measurement method of a kind of measurement arc component deformation, the fiber-optic grating sensor is in arcuation, including fiber grating and is coated on outer protection materials；The protection materials are that a kind of moldable resin based composites can be made into and the consistent sensor of arc component shape to be measured using special dies by disposable Shooting Technique.The small arc component of curvature large radius especially a kind of for all kinds of arc components, sensor is embedded in component to be measured by the synchronous deformation of both external forces, can accurately measure ess-strain.Fiber-optic grating sensor of the invention has the characteristics that high mechanical strength, corrosion resistance are strong, can be applied to different engineering-environments, long service life.
Description
Technical field
The present invention relates to fiber grating sensing technology field more particularly to a kind of fiber gratings of measurement arc component deformation
Sensor and its measurement method.
Background technique
With the continuous quickening of economic construction of China paces, city is being constantly improve and periphery small towns basic common structure is built
If, during building construction etc., the curved surfaces engineering component such as various pipes, culvert and tunnel is increasingly common.These curved surface works
Key position of the journey structure as large scale civil engineering, stress condition are sufficiently complex.And their stress condition direct relation
The safety of engineering construction, therefore real-time monitoring its ess-strain is particularly important.
Since bare optical fibers and bare optical gratings are more fragile, it is very easy to destroy in a bad working environment, therefore, it is necessary to by optical fiber light
The material of the high mechanical strengths such as grid steel disc, alloy sleeve can just come into operation after being packaged protection.By the limit of encapsulating material
System, the generally-straight type of the appearance of fiber-optic grating sensor are simply possible to use in such as large-scale arch bridge of measurement, lonely ellbeam radius deep camber
The tangential stress of small lonely shape structure strains, and the engineering component big for the small curvature of the radiuses such as such as drainage pipeline, subway tunnel,
Since tested component is different from fiber-optic grating sensor shape, the strain generated by same external force is also different, thus pole
The earth affects the precision of measurement.Multiple resistance strain gages are circumferentially pasted to the stress feelings that can be used for detecting annular construction member
Condition, but it is this poor using electric signal as the anti-outside electromagnetic interference ability of the technology of conduction pattern, and foil gauge is exposed to respectively for a long time
In class complex engineering environment, service life is extremely limited.
To sum up, the prior art is difficult to realize the measurement of arc-shaped curved surface component stress strain, and therefore, the present invention is based on existing
Fiber grating optical sensor and the shortcoming of above-mentioned background technology, it is intended that arc-shaped curved surface component can be measured by providing one kind
The fiber-optic grating sensor of ess-strain.
Summary of the invention
In view of this, realizing the present invention provides a kind of fiber-optic grating sensor of measurement arc component deformation for tool
There is the all-position safety of arc-shaped curved surface structure building facility to monitor, improves the later period monitoring dynamics and safety coefficient of building facility.
The technological means that the present invention uses is as follows: a kind of fiber-optic grating sensor of measurement arc component deformation, including light
Fine grating and outer protection materials are coated on, the fiber-optic grating sensor is in arcuation.
Further, preparing the protection materials includes following raw material: unsaturated polyester resin, quartz sand, basalt are fine
Dimension, curing agent and promotor.
Further, the partial size of the quartz sand be 75 μm hereinafter, the length of the basalt fibre be 5~7mm, diameter
For 14~18um.
Further, each parts by weight of raw materials are as follows: 100 parts of unsaturated polyester resin, 20~40 parts of quartz sand, curing agent 1~
2.5 parts, 0.5~1.25 part of promotor；Basalt fibre volume volume is 0.2~0.8%.
Further, the unsaturated polyester resin replaces with epoxy resin；Each parts by weight of raw materials are as follows: epoxy resin 100
Part, 30 parts of quartz sand, 80 parts of curing agent, 1 part of promotor；Basalt fibre volume volume is 0.6%.
Further, the basalt fibre replaces with carbon fiber.
Further, the fiber-optic grating sensor of the measurement arc component deformation, is made, specifically of injection molding
The following steps are included:
S1, by unsaturated polyester resin, quartz sand, basalt fibre, promotor be added blender in stirring at normal temperature 35~
Glue is made in 45min；
S2, curing agent is added in glue, continues 5~8min of stirring, obtain uniformly being molded liquid, seal up for safekeeping；
S3, include using mold diameter be 10~20mm, length be the flexible tubular type external mold of 10~20cm and with to
Survey the consistent prefabricated internal model of Components Shape；External mold is bent to the arcuate shape of component to be measured, and is fixed in smooth flat；It will
One layer of injection molding liquid of fiber grating preliminary wetting is pasted on internal model side, after completing solidification, fits closely external mold and places in it, closes
Both mold ends, and injection hole is reserved, it slowly will evenly be molded liquid with filling gun out of injection hole injection mold, that is, complete note
Modeling；
S4, closed injection mouth, will complete the sample of injection molding in 25~35min of normal temperature cure, after slough external mold to get to
The identical fiber-optic grating sensor of component arcuate shape to be measured.
Further, the diameter of the external mold is 16mm, length 15cm.
Fiber-optic grating sensor of the invention can be applied to the measurement of arc huge concrete structure deformation.
The present invention also provides a kind of measurement methods of arc component deformation, use optical fiber grating sensing of the present invention
Device, shape is consistent with component to be measured, the fiber-optic grating sensor is embedded in component inside to be measured, when object under test stress
When generating deformation, the fiber-optic grating sensor fitted closely therewith also accordingly generates deformation, and output signal is caused to change, that is, treats
The deformation for surveying component measures, to realize the ess-strain of comprehensive real time monitoring testee.
Beneficial effects of the present invention, the present invention provides it is a kind of measurement arc component deformation fiber-optic grating sensor and its
Measurement method.The present invention uses moldable resin based composites as fiber-optic grating sensor protection materials, using being molded into
Type, fiber-optic grating sensor obtained are consistent with the shape of arc component to be measured.Sensor is embedded to component inside to be measured, when to
When surveying object receiving force generation deformation, the fiber-optic grating sensor fitted closely therewith also generates identical deformation, ensure that measurement
Precision.Meanwhile molding die shape can be adjusted according to the curvature of component to be measured, manufactured sensor is not only capable of measuring large size
The tangential stress strain of the small lonely shape structures of radiuses deep camber such as arch bridge, lonely ellbeam, is also capable of measuring for such as drainage pipeline, subway
The big engineering component of the small curvature of the radiuses such as tunnel.The present invention is for realizing to the comprehensive of arc-shaped curved surface structural construction facility
Security monitoring, the later period monitoring dynamics and safety coefficient for improving building facility have important practical significance.And it is of the invention
Sensor has the characteristics that high mechanical strength, corrosion resistance are strong, can be applied to different engineering-environments, long service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the fiber-optic grating sensor that a kind of measurement arc component of the invention deforms；
Fig. 2 is the schematic diagram of the fiber-optic grating sensor of the invention in curved surface member；
In figure: 1, protection materials, 2, fiber grating, 3, fiber-optic grating sensor, 4, curved surface member.
Specific embodiment
The principles and features of the present invention are described below, and illustrated embodiment is served only for explaining the present invention, is not intended to
It limits the scope of the invention.
Embodiment 1
A kind of fiber-optic grating sensor of measurement arc component deformation, including fiber grating 2 and is coated on outer protected material
Material 1, the fiber-optic grating sensor 3 are in arcuation, are laid with sipe on 1 surface of protection materials；Prepare the protection
Material includes following raw material: unsaturated polyester resin, quartz sand, basalt fibre, curing agent and promotor；Each parts by weight of raw materials
Are as follows: 100 parts of unsaturated polyester resin, 20 parts of quartz sand, 1 part of curing agent, 0.5 part of promotor；Basalt fibre volume is insatiable hunger
With the 0.2% of polyester resin volume；The partial size of the quartz sand is 75 μm；The length of the basalt fibre is 5mm, diameter is
14um。
Embodiment 2
A kind of fiber-optic grating sensor of measurement arc component deformation, including fiber grating 2 and is coated on outer protected material
Material 1, the fiber-optic grating sensor 3 are in arcuation, are laid with sipe on 1 surface of protection materials；Prepare the protection
Material includes following raw material: unsaturated polyester resin, quartz sand, basalt fibre, curing agent and promotor；Each parts by weight of raw materials
Are as follows: 100 parts of unsaturated polyester resin, 40 parts of quartz sand, 2.5 parts of curing agent, 1.25 parts of promotor；Basalt fibre volume is not
The 0.6% of saturated polyester resin volume；The partial size of the quartz sand is 60 μm；The length of the basalt fibre is 7mm, diameter
For 18um.
Embodiment 3
A kind of fiber-optic grating sensor of measurement arc component deformation, including fiber grating 2 and is coated on outer protected material
Material 1, the fiber-optic grating sensor 3 are in arcuation, are laid with sipe on 1 surface of protection materials；Prepare the protection
Material includes following raw material: unsaturated polyester resin, quartz sand, basalt fibre, curing agent and promotor；Each parts by weight of raw materials
Are as follows: 100 parts of unsaturated polyester resin, 30 parts of quartz sand, 2 parts of curing agent, 1 part of promotor；Basalt fibre volume is unsaturation
The 0.6% of polyester resin volume；The partial size of the quartz sand is 50 μm；The length of the basalt fibre is 6mm, diameter is
16um。
The preparation method of fiber-optic grating sensor in above-described embodiment 1~3 in any embodiment the following steps are included:
S1, stirring at normal temperature in blender is added in unsaturated polyester resin, quartz sand, basalt fibre, promotor
Glue is made in 40min；
S2, curing agent is added in glue, continues to stir 5min, obtains uniformly being molded liquid, seal up for safekeeping；
S3, include using mold diameter is 15mm, length is 16cm flexible tubular type external mold and with component shape to be measured
The consistent prefabricated internal model of shape.External mold is bent to the arcuate shape of component to be measured, and is fixed in smooth flat；By fiber grating
One layer of injection molding liquid of preliminary wetting is pasted on internal model side, after completing solidification, fits closely external mold and places in it, closed mould both ends,
And injection hole is reserved, it slowly will evenly be molded liquid with filling gun out of injection hole injection mold, that is, complete injection molding；
S4, closed injection mouth, will complete the sample of injection molding in normal temperature cure 30min, after slough external mold to get to it is to be measured
The fiber-optic grating sensor that component arcuate shape matches.
Embodiment 4
A kind of fiber-optic grating sensor of measurement arc component deformation, is, the light in the present embodiment with the difference of embodiment 3
Fiber grating sensor the preparation method is as follows:
S1, stirring at normal temperature in blender is added in unsaturated polyester resin, quartz sand, basalt fibre, promotor
Glue is made in 35min；
S2, curing agent is added in glue, continues to stir 5min, obtains uniformly being molded liquid, seal up for safekeeping；
S3, include using mold diameter is 10mm, length is 10cm flexible tubular type external mold and with component shape to be measured
The consistent prefabricated internal model of shape.External mold is bent to the arcuate shape of component to be measured, and is fixed in smooth flat；By fiber grating
One layer of injection molding liquid of preliminary wetting is pasted on internal model side, after completing solidification, fits closely external mold and places in it, closed mould both ends,
And injection hole is reserved, it slowly will evenly be molded liquid with filling gun out of injection hole injection mold, that is, complete injection molding；
S4, closed injection mouth, will complete the sample of injection molding in normal temperature cure 25min, after slough external mold to get to it is to be measured
The fiber-optic grating sensor that component arcuate shape matches.
Embodiment 5
A kind of fiber-optic grating sensor of measurement arc component deformation, is, the light in the present embodiment with the difference of embodiment 3
Fiber grating sensor the preparation method is as follows:
S1, stirring at normal temperature in blender is added in unsaturated polyester resin, quartz sand, basalt fibre, promotor
Glue is made in 45min；
S2, curing agent is added in glue, continues to stir 8min, obtains uniformly being molded liquid, seal up for safekeeping；
S3, include using mold diameter is 20mm, length is 20cm flexible tubular type external mold and with component shape to be measured
The consistent prefabricated internal model of shape.External mold is bent to the arcuate shape of component to be measured, and is fixed in smooth flat；By fiber grating
One layer of injection molding liquid of preliminary wetting is pasted on internal model side, after completing solidification, fits closely external mold and places in it, closed mould both ends,
And injection hole is reserved, it slowly will evenly be molded liquid with filling gun out of injection hole injection mold, that is, complete injection molding；
S4, closed injection mouth, will complete the sample of injection molding in normal temperature cure 35min, after slough external mold to get to it is to be measured
The fiber-optic grating sensor that component arcuate shape matches.
Embodiment 6
The present embodiment is that the basalt fibre replaces with carbon fiber with the difference of embodiment 3.
The curing agent and promotor that Examples 1 to 6 uses are commercially available curing agent and promotor, and the curing agent can be selected white
Blue water can be selected in water, promotor.
Embodiment 7
A kind of fiber-optic grating sensor of measurement arc component deformation, prepares the protection materials of the fiber-optic grating sensor
Including following raw material: epoxy resin, quartz sand, basalt fibre, curing agent and promotor；Each parts by weight of raw materials are as follows: asphalt mixtures modified by epoxy resin
100 parts of rouge, 30 parts of quartz sand, 80 parts of curing agent, 1 part of promotor；Basalt fibre volume volume is 0.6%；The quartz sand
Partial size be 50 μm；The length of the basalt fibre is 6mm, diameter 16um；Methyl tetrahydro phthalic anhydride can be selected in curing agent, promotees
DMP-30 can be selected into agent.
Comparative example 1
Comparative example 1 and the difference of embodiment 3 are that the fiber-optic grating sensor is in straight shape.
The performance test results that the packaging protection layer of fiber-optic grating sensor is made in Examples 1 to 7 are as follows:
As seen from the above table, Examples 1 to 7 injection molding fluid viscosity appropriateness obtained, mobility is relatively preferable, and injection molding liquid is easy to equal
Even injection molding, manufactured protection materials have high elasticity modulus and tensile strength.Relative to Examples 1 to 2, the bullet of embodiment 3
Property modulus is higher, tensile strength is stronger, show that the corresponding component proportion of embodiment 3 is preferred amounts；Comparative example 3~5, with
The extension of mixing time and curing time, elasticity modulus and tensile strength increase, but the elasticity of embodiment 3 and embodiment 5
Modulus and tensile strength are not much different, and in conjunction with the angle that resource is saved, the technological parameter of embodiment 3 is preferred parameter.Embodiment 6
Basalt fibre is replaced with into carbon fiber, manufactured protection materials elasticity modulus is also higher, tensile strength is also relatively strong；Embodiment 7
Middle basis material uses epoxy resin, and injection molding liquid stream journey is declined, and viscosity increases, but manufactured protection materials are with higher
Elasticity modulus and tensile strength.
The fiber-optic grating sensor of above-mentioned measurement arc component deformation is applied to the survey of arc huge concrete structure deformation
Amount.
A kind of measurement method of arc component deformation, selects fiber-optic grating sensor obtained above, the fiber grating
The arc of the molding bending degree and component to be measured of sensor matches, and the fiber-optic grating sensor is embedded in component to be measured
Inside, when object under test stress generates deformation, the fiber-optic grating sensor fitted closely therewith also accordingly generates deformation, causes
Output signal changes, i.e., measures to the deformation of component to be measured, to realize the stress of comprehensive real time monitoring testee
Strain.
Fiber-optic grating sensor made of Examples 1 to 7 and comparative example 1 to the measurement result of the arc deformation of member to be measured such as
Following table:
As seen from the above table, sensor made of comparative example 1, strain conduction efficiency is poor, conduction eror is big.And Examples 1 to 7
Manufactured sensor, strain conduction efficiency is excellent, conduction eror is small.Moreover, embodiment 3 is compared to Examples 1 to 2 or embodiment
4~5, sensor made of embodiment 3, strain conduction efficiency is more excellent, conduction eror is smaller.Embodiment 6 is fine by basalt
Dimension replaces with carbon fiber, and manufactured sensor conductive efficiency is also higher；Basis material uses epoxy resin in embodiment 7, is made
Strain transducer conduction efficiency is more excellent, conduction eror is smaller.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (6)
1. a kind of fiber-optic grating sensor of measurement arc component deformation, which is characterized in that including fiber grating and be coated on outer
Protection materials, the fiber-optic grating sensor be in arcuation；Preparing the protection materials includes following raw material: unsaturated polyester (UP) tree
Rouge, quartz sand, basalt fibre, curing agent and promotor；Each parts by weight of raw materials are as follows: 100 parts of unsaturated polyester resin, quartz sand
20~40 parts, 1~2.5 part of curing agent, 0.5~1.25 part of promotor；Basalt fibre volume volume is 0.2~0.6%；It is described
The partial size of quartz sand is 75 μm hereinafter, the length of the basalt fibre is 5~7mm, diameter is 14~18um；
It is made of injection molding, specifically includes the following steps:
S1, by unsaturated polyester resin, quartz sand, basalt fibre, promotor be added blender in stirring at normal temperature 35~
Glue is made in 45min；
S2, curing agent is added in glue, continues 5~8min of stirring, obtain uniformly being molded liquid, seal up for safekeeping；
S3, include using mold diameter be 10~20mm, length be the flexible tubular type external mold of 10~20cm and with structure to be measured
The consistent prefabricated internal model of part shape；External mold is bent to the arcuate shape of component to be measured, and is fixed in smooth flat；By optical fiber
One layer of injection molding liquid of grating preliminary wetting is pasted on internal model side, after completing solidification, fits closely external mold and places in it, closed mould
Both ends, and injection hole is reserved, it slowly will evenly be molded liquid with filling gun out of injection hole injection mold, that is, complete injection molding；
S4, closed injection mouth, will complete the sample of injection molding in 25~35min of normal temperature cure, after slough external mold to get to it is to be measured
The identical fiber-optic grating sensor of component arcuate shape.
2. the fiber-optic grating sensor of measurement arc component deformation according to claim 1, which is characterized in that the insatiable hunger
Epoxy resin is replaced with polyester resin；Each parts by weight of raw materials are as follows: 100 parts of epoxy resin, 30 parts of quartz sand, 80 parts of curing agent,
1 part of promotor；Basalt fibre volume volume is 0.6%.
3. the fiber-optic grating sensor of measurement arc component deformation according to claim 1, which is characterized in that the Black Warrior
Rock fiber replaces with carbon fiber.
4. the fiber-optic grating sensor of measurement arc component deformation according to claim 1, which is characterized in that the external mold
Diameter be 16mm, length 15cm.
5. the application of the fiber-optic grating sensor of measurement arc component deformation according to any one of claims 1 to 4, special
Sign is, the measurement applied to the deformation of arc huge concrete structure.
6. a kind of measurement method of arc component deformation, which is characterized in that
Use the fiber-optic grating sensor of measurement arc component deformation described in any one of any one of claims 1 to 44, the optical fiber light
Gate sensor is consistent with component arcuate shape to be measured, the fiber-optic grating sensor is embedded to component inside to be measured, to structure to be measured
The deformation of part measures.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710165175.1A CN106918295B (en) | 2017-03-20 | 2017-03-20 | A kind of fiber-optic grating sensor and its measurement method of the deformation of measurement arc component |
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| CN201710165175.1A CN106918295B (en) | 2017-03-20 | 2017-03-20 | A kind of fiber-optic grating sensor and its measurement method of the deformation of measurement arc component |
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| CN113029020B (en) * | 2021-03-16 | 2022-06-10 | 武汉理工大学 | Preparation and monitoring method of annular component based on embedded fiber bragg grating |
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| GB0620944D0 (en) * | 2006-10-20 | 2006-11-29 | Insensys Ltd | Curvature measurement moving relative to pipe |
| CN1948897A (en) * | 2006-11-10 | 2007-04-18 | 大连理工大学 | Pipe displace ment sensor of optical fibre grating marmen |
| CN102358798A (en) * | 2011-09-13 | 2012-02-22 | 青岛润兴高分子材料有限公司 | High strength sheet molding plastics and production method |
| CN103604383A (en) * | 2013-11-04 | 2014-02-26 | 天津大学 | Fiber grating sensor packaging device for measuring support and hanger pull rod strain |
| CN104101306B (en) * | 2014-07-24 | 2016-08-31 | 河海大学 | A kind of optical fiber grating temperature compensation method and ultra-thin micro reinforcing steel strain gauge |
| CN104101307B (en) * | 2014-07-24 | 2016-08-17 | 河海大学 | A kind of measurement reinforcing bar temperature, fiber grating strain meter of strain simultaneously |
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