CN106918295A - A kind of fiber-optic grating sensor and its measuring method for measuring arc component deformation - Google Patents
A kind of fiber-optic grating sensor and its measuring method for measuring arc component deformation Download PDFInfo
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- CN106918295A CN106918295A CN201710165175.1A CN201710165175A CN106918295A CN 106918295 A CN106918295 A CN 106918295A CN 201710165175 A CN201710165175 A CN 201710165175A CN 106918295 A CN106918295 A CN 106918295A
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- fiber
- grating sensor
- optic grating
- measured
- arc component
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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 a kind of fiber-optic grating sensor and its measuring method for measuring arc component deformation, the fiber-optic grating sensor is in arcuation, including fiber grating and cladding protection materials outside；The protection materials are a kind of moldable resin based composites, using special dies, the sensor consistent with arc component shape to be measured are can be made into by disposable Shooting Technique.For all kinds of arc components especially small arc component of a class curvature large radius, sensor is imbedded in component to be measured by both synchronous deformations of external force effect, can accurately measure ess-strain.The characteristics of fiber-optic grating sensor of the invention has high mechanical strength, corrosion resistance is 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 grating for measuring arc component deformation
Sensor and its measuring method.
Background technology
With the continuous quickening of China's economic construction paces, built in constantly improve city and periphery small towns basic common structure
If, during building construction etc., the curved surface engineering component such as various pipes, culvert and tunnel is increasingly common.These curved surface works
Journey structure as large scale civil engineering key position, its stressing conditions is sufficiently complex.And their stressing conditions direct relation
The safety of engineering construction, therefore real-time monitoring its ess-strain is particularly important.
Because bare optical fibers and bare optical gratings are more fragile, destruction is very easy in harsh environments, accordingly, it would be desirable 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.Limited by encapsulating material
System, the generally-straight type of outward appearance of fiber-optic grating sensor is simply possible to use in such as large-scale arch bridge of measurement, lonely ellbeam radius deep camber
The tangential stress strain of small lonely shape structure, and the engineering component big for the small curvature of the radiuses such as such as drainage pipeline, subway tunnel,
Because tested component is different from fiber-optic grating sensor shape, the strain produced by the effect of equal external force is also different, thus pole
The precision of earth effect measurement.Multiple resistance strain gages are circumferentially pasted the stress feelings that can be used for detecting annular construction member
Condition, but the anti-outside electromagnetic interference ability of this technology with electric signal as conduction pattern, and foil gauge is for a long time exposed to each
In class complex engineering environment, service life is extremely limited.
To sum up, prior art is difficult to the measure of arc-shaped curved surface component stress strain, therefore, the present invention is based on existing
The weak point of fiber grating optical sensor and above-mentioned background technology, it is intended that providing one kind can measure arc-shaped curved surface component
The fiber-optic grating sensor of ess-strain.
The content of the invention
In view of this, the invention provides a kind of fiber-optic grating sensor for measuring arc component deformation, realize for tool
The all-position safety for having arc-shaped curved surface structure Architectural Equipment is monitored, and improves later stage monitoring dynamics and the safety coefficient of Architectural Equipment.
The technological means that the present invention is used is as follows：A kind of fiber-optic grating sensor for measuring arc component deformation, including light
Fine grating and cladding protection materials outside, the fiber-optic grating sensor are in arcuation.
Further, preparing the protection materials includes following raw material：Unsaturated polyester resin, quartz sand, basalt are fine
Dimension, curing agent and accelerator.
Further, the particle diameter of the quartz sand is less than 75 μm, and the length of the basalt fibre is 5~7mm, diameter
It is 14~18um.
Further, each parts by weight of raw materials is：100 parts of unsaturated polyester resin, 20~40 parts of quartz sand, curing agent 1~
2.5 parts, 0.5~1.25 part of accelerator；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 is：Epoxy resin 100
Part, 30 parts of quartz sand, 80 parts of curing agent, 1 part of accelerator；Basalt fibre volume volume is 0.6%.
Further, the basalt fibre replaces with carbon fiber.
Further, the fiber-optic grating sensor of described measurement arc component deformation, is made, specifically of injection moulding
Comprise the following steps：
S1, by unsaturated polyester resin, quartz sand, basalt fibre, accelerator add mixer in stirring at normal temperature 35~
45min, is made glue；
S2, curing agent is added in glue, continue to stir 5~8min, be uniformly molded liquid, sealed up for safekeeping；
S3, using mould include a diameter of 10~20mm, length be the flexible tubular type external molds of 10~20cm and with treat
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；Will
One layer of injection liquid of fiber grating preliminary wetting, is pasted on internal model side, after completing solidification, is brought into close contact external mold and places in it, closes
Both mold ends, and injection hole is reserved, slowly evenly injection liquid is injected in mould from injection hole with filling gun, that is, complete note
Modeling；
S4, closed injection mouthful, will complete the sample of injection in 25~35min of normal temperature cure, after slough external mold, that is, obtain with
Component arcuate shape identical fiber-optic grating sensor to be measured.
Further, a diameter of 16mm of the external mold, length is 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 measuring method of arc component deformation, uses optical fiber grating sensing of the present invention
Device, its shape is consistent with component to be measured, and the fiber-optic grating sensor is embedded in into component inside to be measured, when object under test stress
When producing deformation, the fiber-optic grating sensor being brought into close contact therewith also accordingly produces deformation, causes output signal to change, that is, treat
The deformation for surveying component is measured, so as to realize the ess-strain of comprehensive monitor in real time testee.
Beneficial effects of the present invention, the invention provides it is a kind of measure arc component deformation fiber-optic grating sensor and its
Measuring method.The present invention uses moldable resin based composites as fiber-optic grating sensor protection materials, using being molded into
Type, obtained fiber-optic grating sensor is consistent with the shape of arc component to be measured.Sensor is imbedded into component inside to be measured, when treating
When surveying object receiving force generation deformation, the fiber-optic grating sensor being brought into close contact therewith also produces identical deformation, it is ensured that measurement
Precision.Meanwhile, mould shape can be adjusted according to the curvature of component to be measured, the sensor being made can not only measure large-scale
The tangential stress strain of the small lonely shape structures of radius deep camber such as arch bridge, lonely ellbeam, can also measure 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 stage monitoring dynamics and safety coefficient for improving Architectural Equipment has important practical significance.And it is of the invention
The characteristics of sensor has high mechanical strength, corrosion resistance is strong, can be applied to different engineering-environments, long service life.
Brief description of the drawings
Fig. 1 is a kind of structural representation of fiber-optic grating sensor for measuring arc component deformation of the invention；
Fig. 2 is schematic diagram of the fiber-optic grating sensor of the invention in curved surface member；
In figure：1st, protection materials, 2, fiber grating, 3, fiber-optic grating sensor, 4, curved surface member.
Specific embodiment
Principle of the invention and feature are described below, illustrated embodiment is served only for explaining the present invention, is not intended to
Limit the scope of the present invention.
Embodiment 1
A kind of fiber-optic grating sensor for measuring arc component deformation, including fiber grating 2 and cladding protected material outside
Material 1, the fiber-optic grating sensor 3 is in arcuation, and the protection materials 1 are laid with sipe on surface；Prepare the protection
Material includes following raw material：Unsaturated polyester resin, quartz sand, basalt fibre, curing agent and accelerator；Each parts by weight of raw materials
For：100 parts of unsaturated polyester resin, 20 parts of quartz sand, 1 part of curing agent, 0.5 part of accelerator；Basalt fibre volume is insatiable hunger
With the 0.2% of polyester resin volume；The particle diameter of the quartz sand is 75 μm；The length of the basalt fibre is 5mm, a diameter of
14um。
Embodiment 2
A kind of fiber-optic grating sensor for measuring arc component deformation, including fiber grating 2 and cladding protected material outside
Material 1, the fiber-optic grating sensor 3 is in arcuation, and the protection materials 1 are laid with sipe on surface；Prepare the protection
Material includes following raw material：Unsaturated polyester resin, quartz sand, basalt fibre, curing agent and accelerator；Each parts by weight of raw materials
For：100 parts of unsaturated polyester resin, 40 parts of quartz sand, 2.5 parts of curing agent, 1.25 parts of accelerator；Basalt fibre volume is not for
The 0.6% of saturated polyester resin volume；The particle diameter of the quartz sand is 60 μm；The length of the basalt fibre is 7mm, diameter
It is 18um.
Embodiment 3
A kind of fiber-optic grating sensor for measuring arc component deformation, including fiber grating 2 and cladding protected material outside
Material 1, the fiber-optic grating sensor 3 is in arcuation, and the protection materials 1 are laid with sipe on surface；Prepare the protection
Material includes following raw material：Unsaturated polyester resin, quartz sand, basalt fibre, curing agent and accelerator；Each parts by weight of raw materials
For：100 parts of unsaturated polyester resin, 30 parts of quartz sand, 2 parts of curing agent, 1 part of accelerator；Basalt fibre volume is unsaturation
The 0.6% of polyester resin volume；The particle diameter of the quartz sand is 50 μm；The length of the basalt fibre is 6mm, a diameter of
16um。
The preparation method of the fiber-optic grating sensor in above-described embodiment 1~3 in any embodiment is comprised the following steps：
S1, by unsaturated polyester resin, quartz sand, basalt fibre, accelerator add mixer in stirring at normal temperature
40min, is made glue；
S2, curing agent is added in glue, continue to stir 5min, be uniformly molded liquid, sealed up for safekeeping；
S3, using mould include a diameter of 15mm, length for 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 liquid of preliminary wetting, is pasted on internal model side, after completing solidification, is brought into close contact external mold and places in it, closed mould two ends,
And injection hole is reserved, and slowly evenly injection liquid is injected in mould from injection hole with filling gun, that is, complete injection；
S4, closed injection mouthful, will complete the sample of injection in normal temperature cure 30min, after slough external mold, that is, obtain with it is to be measured
The fiber-optic grating sensor that component arcuate shape matches.
Embodiment 4
A kind of fiber-optic grating sensor for measuring arc component deformation, be with the difference of embodiment 3, the light in the present embodiment
The preparation method of fiber grating sensor is as follows：
S1, by unsaturated polyester resin, quartz sand, basalt fibre, accelerator add mixer in stirring at normal temperature
35min, is made glue；
S2, curing agent is added in glue, continue to stir 5min, be uniformly molded liquid, sealed up for safekeeping；
S3, using mould include a diameter of 10mm, length for 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 liquid of preliminary wetting, is pasted on internal model side, after completing solidification, is brought into close contact external mold and places in it, closed mould two ends,
And injection hole is reserved, and slowly evenly injection liquid is injected in mould from injection hole with filling gun, that is, complete injection；
S4, closed injection mouthful, will complete the sample of injection in normal temperature cure 25min, after slough external mold, that is, obtain with it is to be measured
The fiber-optic grating sensor that component arcuate shape matches.
Embodiment 5
A kind of fiber-optic grating sensor for measuring arc component deformation, be with the difference of embodiment 3, the light in the present embodiment
The preparation method of fiber grating sensor is as follows：
S1, by unsaturated polyester resin, quartz sand, basalt fibre, accelerator add mixer in stirring at normal temperature
45min, is made glue；
S2, curing agent is added in glue, continue to stir 8min, be uniformly molded liquid, sealed up for safekeeping；
S3, using mould include a diameter of 20mm, length for 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 liquid of preliminary wetting, is pasted on internal model side, after completing solidification, is brought into close contact external mold and places in it, closed mould two ends,
And injection hole is reserved, and slowly evenly injection liquid is injected in mould from injection hole with filling gun, that is, complete injection；
S4, closed injection mouthful, will complete the sample of injection in normal temperature cure 35min, after slough external mold, that is, obtain with 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 accelerator that embodiment 1~6 is used are commercially available curing agent and accelerator, and the curing agent can select white
Water, accelerator can select indigo plant water.
Embodiment 7
A kind of fiber-optic grating sensor for measuring 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 accelerator；Each parts by weight of raw materials is：Asphalt mixtures modified by epoxy resin
100 parts of fat, 30 parts of quartz sand, 80 parts of curing agent, 1 part of accelerator；Basalt fibre volume volume is 0.6%；The quartz sand
Particle diameter be 50 μm；The length of the basalt fibre is 6mm, a diameter of 16um；Curing agent can select methyl tetrahydro phthalic anhydride, promote
Enter agent and can select DMP-30.
Comparative example 1
Comparative example 1 is that the fiber-optic grating sensor is in straight shape with the difference of embodiment 3.
Embodiment 1~7 is made the performance test results such as following table of the packaging protection layer of fiber-optic grating sensor：
As seen from the above table, the obtained injection fluid viscosity appropriateness of embodiment 1~7, mobility is relatively preferable, and injection liquid is easy to equal
Even injection, the protection materials being made have elastic modelling quantity and tensile strength high.Relative to embodiment 1~2, 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
Mixing time and the extension of hardening time, elastic modelling quantity and tensile strength increase, but embodiment 3 and embodiment 5 elasticity
Modulus and tensile strength are more or less the same, and with reference to 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, the protection materials elastic modelling quantity being made is also higher, tensile strength is also stronger；Embodiment 7
Middle matrix material uses epoxy resin, and injection liquid flow has declined, viscosity increase, but the protection materials being made are with higher
Elastic modelling quantity 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 measuring method of arc component deformation, from fiber-optic grating sensor obtained above, the fiber grating
Shaping degree of crook and the arc of component to be measured of sensor match, and the fiber-optic grating sensor is embedded in into component to be measured
Inside, when object under test stress produces deformation, the fiber-optic grating sensor being brought into close contact therewith also accordingly produces deformation, causes
Output signal is changed, i.e. the deformation to component to be measured is measured, so as to realize the stress of comprehensive monitor in real time testee
Strain.
The fiber-optic grating sensor that embodiment 1~7 and comparative example 1 are made to the measurement result of the arc deformation of member to be measured such as
Following table：
As seen from the above table, the sensor that comparative example 1 is made, strain conduction efficiency is poor, conduction eror is big.And embodiment 1~7
The sensor being made, strain conduction efficiency is excellent, conduction eror is small.And, embodiment 3 is compared to embodiment 1~2 or embodiment
4~5, the sensor that embodiment 3 is made, strain conduction efficiency is more excellent, conduction eror is smaller.Embodiment 6 is fine by basalt
Dimension replaces with carbon fiber, and the sensor conductive efficiency being made is also higher；Matrix material uses epoxy resin in embodiment 7, is made
Strain transducer conduction efficiency is more excellent, conduction eror is smaller.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (10)
1. it is a kind of to measure the fiber-optic grating sensor that arc component deforms, it is characterised in that including fiber grating and cladding outside
Protection materials, the fiber-optic grating sensor be in arcuation.
2. the fiber-optic grating sensor that measurement arc component according to claim 1 deforms, it is characterised in that prepare described
Protection materials include following raw material：Unsaturated polyester resin, quartz sand, basalt fibre, curing agent and accelerator.
3. the fiber-optic grating sensor that measurement arc component according to claim 2 deforms, it is characterised in that the quartz
The particle diameter of sand is less than 75 μm, and the length of the basalt fibre is 5~7mm, a diameter of 14~18um.
4. the fiber-optic grating sensor that measurement arc component according to claim 3 deforms, it is characterised in that each raw material weight
Measuring part is：100 parts of unsaturated polyester resin, 20~40 parts of quartz sand, 1~2.5 part of curing agent, 0.5~1.25 part of accelerator；It is profound
Military rock fiber volume volume is 0.2~0.6%.
5. the fiber-optic grating sensor that measurement arc component according to claim 4 deforms, it is characterised in that the insatiable hunger
Epoxy resin is replaced with polyester resin；Each parts by weight of raw materials is：100 parts of epoxy resin, 30 parts of quartz sand, 80 parts of curing agent,
1 part of accelerator；Basalt fibre volume volume is 0.6%.
6. the fiber-optic grating sensor that measurement arc component according to claim 2 deforms, it is characterised in that the Black Warrior
Rock fiber replaces with carbon fiber.
7. the fiber-optic grating sensor that measurement arc component according to claim 2 deforms, it is characterised in that using injection
Shaping is made, and specifically includes following steps：
S1, by unsaturated polyester resin, quartz sand, basalt fibre, accelerator add mixer in stirring at normal temperature 35~
45min, is made glue；
S2, curing agent is added in glue, continue to stir 5~8min, be uniformly molded liquid, sealed up for safekeeping；
S3, using mould include a diameter of 10~20mm, length be the flexible tubular type external molds 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 liquid of grating preliminary wetting, is pasted on internal model side, after completing solidification, is brought into close contact external mold and places in it, closed mould
Two ends, and injection hole is reserved, slowly evenly injection liquid is injected in mould from injection hole with filling gun, that is, complete injection；
S4, closed injection mouthful, will complete the sample of injection in 25~35min of normal temperature cure, after slough external mold, that is, obtain with it is to be measured
Component arcuate shape identical fiber-optic grating sensor.
8. the fiber-optic grating sensor that measurement arc component according to claim 7 deforms, it is characterised in that the external mold
A diameter of 16mm, length is 15cm.
9. the application of the fiber-optic grating sensor of the measurement arc component deformation according to any one of claim 1 to 8, it is special
Levy and be, be applied to the measurement of arc huge concrete structure deformation.
10. the measuring method that a kind of arc component deforms, it is characterised in that
Fiber-optic grating sensor any one of usage right requirement 1 to 8, the fiber-optic grating sensor and component to be measured
Arcuate shape is consistent, and the fiber-optic grating sensor is imbedded into component inside to be measured, and the deformation to component to be measured is measured.
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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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| CN106918295B CN106918295B (en) | 2019-11-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113029020A (en) * | 2021-03-16 | 2021-06-25 | 武汉理工大学 | Preparation and monitoring method of annular component based on embedded fiber bragg grating |
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| CN106918295B (en) | 2019-11-15 |
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Address after: Room 308, comprehensive office building, No.9, Central Avenue, creative industry park, Yazhou District, Sanya City, Hainan Province Patentee after: Hainan Zhongyi New Material Research Institute Co., Ltd Address before: 572000, 308, general office building, No. 9, Central Avenue, creative industry park, Sanya, Hainan Patentee before: HAINAN RUIZE NEW MATERIAL INSTITUTE Co.,Ltd. |