CN110044287A - The combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately - Google Patents
The combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately Download PDFInfo
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- CN110044287A CN110044287A CN201910148987.4A CN201910148987A CN110044287A CN 110044287 A CN110044287 A CN 110044287A CN 201910148987 A CN201910148987 A CN 201910148987A CN 110044287 A CN110044287 A CN 110044287A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 36
- 239000000835 fiber Substances 0.000 claims abstract description 105
- 238000004806 packaging method and process Methods 0.000 claims abstract description 52
- 230000001681 protective effect Effects 0.000 claims description 13
- 239000011241 protective layer Substances 0.000 claims description 13
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000002689 soil Substances 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 11
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 230000009466 transformation Effects 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
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- 206010034960 Photophobia Diseases 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 208000013469 light sensitivity Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000382 optic material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 238000009490 roller compaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—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
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- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses the combined long gauge length optical fibre grating strain transducers that a kind of prestressing force can be adjusted accurately, it is related to sensor technical field, the elasticity modulus and elastic modulus of soil body to be measured for solving the encapsulating structure material of existing strain transducer to a certain extent mismatch, encapsulating structure and the soil body to be measured are unable to cooperative transformation, to cause the technical problem of monitoring accuracy inaccuracy.The combined long gauge length optical fibre grating strain transducer that prestressing force of the invention can be adjusted accurately includes: fiber grating packaging arrangement, the first fixed underpan, the second fixed underpan, adjusts component and fiber Bragg grating (FBG) demodulator；One end of fiber grating packaging arrangement is arranged on the first fixed underpan, and the other end of fiber grating packaging arrangement wears and is fixed on the second fixed underpan；It adjusts component to be arranged fiber grating packaging arrangement and be fixed on the second fixed underpan, adjusts the tensioning degree that component is used to adjust fiber grating；Fiber Bragg grating (FBG) demodulator connect with fiber grating packaging arrangement and close to second fixed underpan.
Description
Technical field
The present invention relates to sensor technical field, the combined long gauge length that can be accurately adjusted more particularly, to a kind of prestressing force
Fiber Bragg grating strain sensor.
Background technique
Fiber grating mainly reflects the detection of physical quantity as fiber optic passive device by the variation of screen periods and effectively
The variation of rate causes, and effectively measures with prestressed packing forms physical quantity and is of great significance.Fiber grating strain
It is high not only to compress the linearity in the case where applying prestressed technological specification for sensor, and improves measurement compression strain range, pole
The earth improves optical fiber grating sensing performance, improves negative strain measurement accuracy and increases sensitivity, facilitates in the measurement of high frequency
Advantageously.
In highway structure, traditional strain gauge is no longer satisfied present measurement request.Since measuring device needs
It is embedded to ground, is easy to damage in ground roller compaction process, in addition under long term high temperature weather, common strain gauge can occur always
The phenomenon that change, all causes very big difficulty to measurement.The elasticity modulus of the encapsulating structure material of most of strain transducer with to
It measures elastic modulus of soil body to mismatch, encapsulating structure and the soil body to be measured are unable to cooperative transformation, to cause monitoring accuracy inaccurate.
And the materials such as polytetrafluoroethylene (PTFE) are used, there can be certain flexibility simultaneously with high temperature resistant, and then can achieve adjusting fiber grating and answer in advance
The purpose of power.
Therefore, how a kind of combination that the combined long gauge length prestressing force that prestressing force can be adjusted accurately can be adjusted accurately is provided
Formula long gauge length optical fibre grating strain transducer, it has also become the technical issues of those skilled in the art's urgent need to resolve.
Summary of the invention
The purpose of the present invention is to provide the combined long gauge length prestressing force that a kind of prestressing force can be adjusted accurately accurately to adjust
The combined long gauge length optical fibre grating strain transducer of section, solves the encapsulating structure material of existing strain transducer to a certain extent
The elasticity modulus of material and elastic modulus of soil body to be measured mismatch, and encapsulating structure and the soil body to be measured are unable to cooperative transformation, to make
At the technical problem of monitoring accuracy inaccuracy.
The present invention provides a kind of combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately, comprising:
Fiber grating packaging arrangement, the second fixed underpan, adjusts component and fiber Bragg grating (FBG) demodulator at the first fixed underpan；
One end of the fiber grating packaging arrangement is arranged on the first fixed underpan, the other end of the fiber grating packaging arrangement wear and
It is fixed on second fixed underpan；The adjusting component is arranged the fiber grating packaging arrangement and is fixed on the described second fixed bottom
On disk, the tensioning degree for adjusting component and being used to adjust the fiber grating；The fiber Bragg grating (FBG) demodulator and the optical fiber
Grating assembly connection and close second fixed underpan.
Further, the adjusting component includes: fixed card ring, screwed pipe, force adjustment spiral cover and tenses silk；
The threaded tube is set on the fixed card ring；The force adjustment spiral cover is sheathed on the screwed pipe, and the screw thread
Pipe is threadedly engaged with the force adjustment spiral cover；Described one end for tensing silk is arranged on the fiber grating packaging arrangement, and this junction
Positioned at the outside of second fixed underpan, the other end for tensing silk is in the fiber grating packaging arrangement and the fixed card ring
Between gap be pierced by, be fixed on the force adjustment spiral cover.
Further, the length of the fixed card ring is greater than the length of the force adjustment spiral cover, the length of the force adjustment spiral cover
Greater than the length of the screwed pipe.
Further, the adjusting component further include: pointer 24；The outer of the fixed card ring is arranged in the pointer 24
Side, and close to the top of the force adjustment spiral cover；
The top of the force adjustment spiral cover is provided with scale, and the pointer 24 is used to indicate the adjusting scale for adjusting component.
Further, second fixed underpan is provided with interior annular groove and outer ring in the side far from the first fixed underpan
Shape slot, the interior annular groove are located at the inside of the outer annular groove；
The fixed card ring and the screwed pipe are arranged on second fixed underpan by the interior annular groove.
Further, further includes: protection cap；The protection cap is arranged by the outer annular groove at the described second fixed bottom
On disk, the protection cap is for adjusting component described in seal protection.
Further, the fiber grating packaging arrangement includes: fiber grating and protective layer；The protective layer is sheathed on the light
On fine grating, the fiber grating is connect with the fiber Bragg grating (FBG) demodulator.
Further, further includes: protective shell；The protective shell is sheathed on the fiber grating packaging arrangement, and the protection
One end of shell is arranged on first fixed underpan, and the other end of the protective shell is arranged on second fixed underpan.
Further, the protective layer is the casing of polytetrafluoroethylene (PTFE) production.
Compared with the existing technology, the combined long gauge length optical fibre grating that a kind of prestressing force of the present invention can be adjusted accurately
Strain transducer has the advantage that
The present invention provides a kind of combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately, comprising: optical fiber
Grating assembly, the second fixed underpan, adjusts component and fiber Bragg grating (FBG) demodulator at the first fixed underpan；
One end of the fiber grating packaging arrangement is arranged on the first fixed underpan, the other end of the fiber grating packaging arrangement wear and
It is fixed on second fixed underpan；The adjusting component is arranged the fiber grating packaging arrangement and is fixed on the described second fixed bottom
On disk, the tensioning degree for adjusting component and being used to adjust the fiber grating；The fiber Bragg grating (FBG) demodulator and the optical fiber
Grating assembly connection and close second fixed underpan.The combined long gauge length that prestressing force provided by the invention can be adjusted accurately
Fiber Bragg grating strain sensor, solve to a certain extent the elasticity modulus of the encapsulating structure material of existing strain transducer with to
It measures elastic modulus of soil body to mismatch, encapsulating structure and the soil body to be measured are unable to cooperative transformation, to cause monitoring accuracy inaccurate
The technical issues of.
In the case where the first fixed underpan and fixed the second fixed underpan, middle adjusting component of the invention can pass through rotation
Modulation power spiral cover drives tension silk to haul the second fixed underpan direction stretching together of fiber grating and protective layer, changes fiber grating
Tensioning degree, achieve the purpose that adjust prestressing force size；The pointer 24 that is arranged on fixed card ring and on force adjustment spiral cover
Scale is set, ensure that the precision and accuracy for adjusting component adjustment.
The present invention also provides a kind of sensors, also solve the encapsulating structure material of existing strain transducer to a certain extent
Elasticity modulus and elastic modulus of soil body to be measured mismatch, encapsulating structure and the soil body to be measured are unable to cooperative transformation, to cause
The technical problem of monitoring accuracy inaccuracy.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the combined long gauge length optical fibre grating strain sensing that prestressing force provided in an embodiment of the present invention can be adjusted accurately
The structural schematic diagram of device length direction；
Fig. 2 is the structural schematic diagram provided in an embodiment of the present invention for adjusting component；
Fig. 3 is the combined long gauge length optical fibre grating strain transducer that prestressing force provided in an embodiment of the present invention can be adjusted accurately
Local axis side structure structural schematic diagram.
Appended drawing reference: 10- fiber grating；11- protective layer；20- fixed card ring；21- screwed pipe；22- force adjustment spiral cover；23-
Tense silk；24- pointer；The first fixed underpan of 30-；The second fixed underpan of 40-；50- protective shell；60- protection cap；70- optical fiber light
Grid (FBG) demodulator.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements.For the ordinary skill in the art, it can understand that above-mentioned term exists with concrete condition
Concrete meaning in the present invention.
Referring to figures 1-3, Fig. 1 is the combined long gauge length optical fibre that prestressing force provided in an embodiment of the present invention can be adjusted accurately
The structural schematic diagram of grating strain transducer length direction；Fig. 2 is the structural representation provided in an embodiment of the present invention for adjusting component
Figure；Fig. 3 is the combined long gauge length optical fibre grating strain transducer that prestressing force provided in an embodiment of the present invention can be adjusted accurately
Local axis side structure structural schematic diagram.
The present invention provides a kind of combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately, comprising:
Fiber grating packaging arrangement, the second fixed underpan 40, adjusts component and fiber Bragg grating (FBG) demodulator 70 at the first fixed underpan 30；
One end of fiber grating packaging arrangement is arranged on the first fixed underpan 30, and the other end of fiber grating packaging arrangement wears and is fixed on
Second fixed underpan 40；It adjusts component to be arranged fiber grating packaging arrangement and be fixed on the second fixed underpan 40, adjusts component and be used for
Adjust the tensioning degree of fiber grating 10；Fiber Bragg grating (FBG) demodulator 70 connect with fiber grating packaging arrangement and close to the second fixed underpan
40。
It further illustrates, compared with the existing technology, the combined long mark that the prestressing force of the embodiment of the present invention can be adjusted accurately
It is had the advantage that away from fiber Bragg grating strain sensor
The combined long gauge length optical fibre grating strain transducer that prestressing force provided in an embodiment of the present invention can be adjusted accurately, comprising:
Fiber grating packaging arrangement, the second fixed underpan 40, adjusts component and fiber Bragg grating (FBG) demodulator 70 at the first fixed underpan 30；
One end of fiber grating packaging arrangement is arranged on the first fixed underpan 30, and the other end of fiber grating packaging arrangement wears and is fixed on
Second fixed underpan 40；It adjusts component to be arranged fiber grating packaging arrangement and be fixed on the second fixed underpan 40, adjusts component and be used for
Adjust the tensioning degree of fiber grating 10；Fiber Bragg grating (FBG) demodulator 70 connect with fiber grating packaging arrangement and close to the second fixed underpan
40.The combined long gauge length optical fibre grating strain transducer and sensor that prestressing force provided by the invention can be adjusted accurately, one
The elasticity modulus and elastic modulus of soil body to be measured for determining the encapsulating structure material that existing strain transducer is solved in degree mismatch,
Encapsulating structure and the soil body to be measured are unable to cooperative transformation, to cause the technical problem of monitoring accuracy inaccuracy.
Specifically, in the case where the first fixed underpan 30 and fixed the second fixed underpan 40, middle adjusting group of the invention
Part can drive tension silk 23 to haul fiber grating 10 and protective layer 11 second fixed underpan together by rotation force adjustment spiral cover 22
40 directions stretch, and change the tensioning degree of fiber grating 10, achieve the purpose that adjust prestressing force size；It is set on fixed card ring 20
The pointer 24 set and scale is set on force adjustment spiral cover 22, ensure that the precision and accuracy for adjusting component adjustment.
More specifically, fluted screw thread is arranged for one end of fiber grating packaging arrangement and the first fixed underpan 30 agrees with and and consolidates
It is fixed, the fixed optical fiber light of an aperture is provided at neck one end of fiber grating packaging arrangement and 40 disk same plane of the second fixed underpan
Grid component makes fiber grating packaging arrangement measure the mean strain between the first fixed underpan 30 and the second fixed underpan 40.
Further, it is preferable to ground, fiber grating packaging arrangement is located remotely from the second fixed underpan 40 and away from being equipped at aperture 25mm
Annular groove, for tensing 23 detent of silk；The distance between first fixed underpan 30 and the second fixed underpan 40 are 150-500mm, this
Distance needs to adjust adjustment according to bulk measurement is tested.
Further, 30 internal diameter of the first fixed underpan is 13mm, and the inner wall close to 40 side of the second fixed underpan is arranged
Fluted screw thread, agrees with fiber grating packaging arrangement, outer diameter 60mm, disc thickness 8mm, can also be according to measured body stress deformation
Complexity adjustment outer diameter size.
In one embodiment of the present of invention, in order to achieve the purpose that accurately to adjust prestressing force size, institute referring to figures 1-3
Show；Adjusting component of the invention includes: fixed card ring 20, screwed pipe 21, force adjustment spiral cover 22 and tenses silk 23；
Screwed pipe 21 is sheathed on fixed card ring 20；Force adjustment spiral cover 22 is sheathed on screwed pipe 21, and screwed pipe 21 and force adjustment are revolved
Lid 22 is threadedly engaged；The one end for tensing silk 23 is arranged on fiber grating packaging arrangement, and this junction is located at the second fixed underpan 40
Outside, gap of the other end between fiber grating packaging arrangement and fixed card ring 20 for tensing silk 23 be pierced by, and is fixed on force adjustment rotation
On lid 22.
Specifically, screwed pipe 21 is threadedly engaged with force adjustment spiral cover 22, that is, when rotating force adjustment spiral cover 22, force adjustment spiral cover 22 is along spiral shell
The length direction of line pipe 21 is mobile, and tenses 23 one end of silk and be linked on fiber grating packaging arrangement, another to be connected to force adjustment spiral cover
On 22, in this way, prestressing force size can be adjusted.
In one embodiment of the present of invention, in order to guarantee stability when adjusting the adjusting of component, referring to figures 1-3 institute
Show；The length of fixed card ring 20 of the present invention is greater than the length of force adjustment spiral cover 22, and the length of force adjustment spiral cover 22 is greater than screwed pipe 21
Length.
Specifically, the length of force adjustment spiral cover 22 is greater than in the length of fixed card ring 20, and the length of force adjustment spiral cover 22 is greater than
In the case where 21 length of screwed pipe, tense after gap of the silk 23 between fiber grating packaging arrangement and fixed card ring 20 be pierced by, just with
The top of fixed card ring 20 is tightly bonded, then fixed with force adjustment spiral cover 22, so that it is V-shaped to tense silk 23.
More specifically, tensing silk 23 when force adjustment spiral cover 22 is to close to the movement of the direction of the second fixed underpan 40 and hauling light
Fine grating assembly elongation, improves prestressing force, conversely, when mobile to the direction far from the second fixed underpan 40 when force adjustment spiral cover 22,
It tenses silk 23 and does not just haul fiber grating packaging arrangement elongation, prestressing force reduces.
Further, the screw pitch of screw thread is set as 1.5mm, i.e., when force adjustment spiral cover 22 is in initial position, force adjustment spiral cover 22 is every
Revolve the fiber grating packaging arrangement elongation 1.5mm that turns around.
Further, the tension silk 23 in the present invention is preferably 3, is set around fiber grating packaging arrangement circumference every 120 °
1 is set, 20 top of fixed card ring is uniformly provided with 3 card slots, and for drawing 3 tension silks 23 to pass through, 22 upper end of force adjustment spiral cover is uniformly set
There are 3 apertures, passes through and fix for 3 tension silks 23；3 tension silks 23, which are uniformly distributed, makes fiber grating packaging arrangement uniform force.
In one embodiment of the present of invention, can accurately to learn prestressed size, with reference to shown in Fig. 2-Fig. 3；This hair
Bright adjusting component further include: pointer 24；The outside of fixed card ring 20 is arranged in pointer 24, and close to the top of force adjustment spiral cover 22；
The top of force adjustment spiral cover 22 is provided with scale, and pointer 24 is used to indicate the adjusting scale for adjusting component.
Specifically, pointer 24 is to identify prestressed size, when force adjustment spiral cover 22 is in initial position, at pointer 24
In the position that prestressing force is zero, 22 top of force adjustment spiral cover is uniformly provided with 72 scales, is driven and is tensed by rotation force adjustment spiral cover 22
Silk 23 hauls fiber grating packaging arrangement elongation, changes the tensioning degree of fiber grating packaging arrangement, achievees the purpose that adjust prestressing force size.
More specifically, the scale of force adjustment spiral cover 22 can be needed suitably to decrease or increase according to prestressing force precision.
In one embodiment of the present of invention, for the combined long gauge length optical fibre grating strain that adjust prestressing force can accurately
Sensor is more firm, referring to Fig. 1 and Fig. 3；Second fixed underpan 40 of the invention is arranged in the side far from the first fixed underpan 30
There are interior annular groove and outer annular groove, interior annular groove is located at the inside of outer annular groove；
Fixed card ring 20 and screwed pipe 21 are arranged on the second fixed underpan 40 by interior annular groove.
Specifically, the section of the axial direction of the second fixed underpan 40 is in E shape, and two grooves of E shape are interior annular groove
With outer annular groove.
In one embodiment of the present of invention, further includes: protection cap 60；Protection cap 60 is arranged solid second by outer annular groove
Determine on chassis 40, protection cap 60 adjusts component for seal protection.
Specifically, outer annular groove is equipped with screw thread, cooperates with protection cap 60, plays seal protection to component is adjusted.
It is shown referring to figures 1-3 in order to obtain accurate result in one embodiment of the present of invention；Optical fiber of the present invention
Grating assembly includes: fiber grating 10 and protective layer 11；Protective layer 11 is sheathed on fiber grating 10, fiber grating 10 and optical fiber
Grating demodulation instrument 70 connects.
Specifically, protective layer 11 enhances the combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately
Compatible deformation ability and ageing resistance resistant to high temperatures with measured structure, further protection fiber grating 10.
More specifically, fiber grating 10 is a kind of refractive index generation axial cyclic for making fiber core by certain method
The diffraction grating of modulation and formation, is a kind of passive filtering device.Since grating fibers have, small in size, splice loss, splice attenuation is small, complete
It is compatible with optical fiber, the advantages that intellectual material can be embedded to, and its resonance wavelength is to the extraneous ring such as temperature, strain, refractive index, concentration
The variation in border is more sensitive, therefore is widely used in fiber optic communication and sensory field.
Fiber grating 10 is the light sensitivity using fiber optic materials, by the method for ultraviolet photoetching by incident light coherent field figure
Fibre core is written in sample, and the refractive index periodic generated in fibre core along fibre core axial direction changes, to form the phase in permanent space
Grating, effect are substantially (transmission or reflection) filter or reflecting mirror that a narrowband is formed in fibre core.When a beamwidth
When spectral light passes through fiber grating 10, the wavelength for meeting 10 Bragg condition of fiber grating will generate reflection, remaining wavelength is saturating
Fiber grating 10 is crossed to continue to transmit.
Further, fiber Bragg grating (FBG) demodulator 70 is with small in size, precision is high, 10 sensor of Larger Dynamic range fiber grating
The analysis ability of the spectrum of measurement capability and accuracy.Be mainly used in bridge, dam, skyscraper, tunnel, highway,
The structural strain in the fields such as electric power, petrochemical industry, fire-fighting, HVAC and the real-time monitoring of temperature.
It is shown referring to figures 1-3 in order to protect fiber grating packaging arrangement in one embodiment of the present of invention；Further include: protection
Shell 50；Protective shell 50 is sheathed on fiber grating packaging arrangement, and one end of protective shell 50 is arranged on the first fixed underpan 30, protection
The other end of shell 50 is arranged on the second fixed underpan 40.
Specifically, protective shell 50 is arranged between the first fixed underpan 30 and the second fixed underpan 40, can fully protect
Fiber grating packaging arrangement is protected, prevents from influencing the combined long gauge length light that can accurately adjust of prestressing force by rolling in practical engineering application
The normal work of fiber grating strain transducer.
More specifically, protective shell 50 of the invention is preferably the protective shell 50 of stainless steel material manufacture.
It is shown referring to figures 1-3 in order to more preferably protect fiber grating 10 in one embodiment of the present of invention；The present invention protects
Sheath 11 is the casing of polytetrafluoroethylene (PTFE) production.
Specifically, material selected by protective layer 11 is polytetrafluoroethylene (PTFE) as deformation element, improves high-temperature aging resisting energy
Power enhances the compatible deformation ability with works.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (9)
1. the combined long gauge length optical fibre grating strain transducer that a kind of prestressing force can be adjusted accurately characterized by comprising light
Fine grating assembly, the second fixed underpan, adjusts component and fiber Bragg grating (FBG) demodulator at the first fixed underpan；
One end of the fiber grating packaging arrangement is arranged on first fixed underpan, and the other end of the fiber grating packaging arrangement is worn
And if being fixed on second fixed underpan；The adjusting component, which is arranged the fiber grating packaging arrangement and is fixed on described second, to be consolidated
Determine on chassis, the tensioning degree for adjusting component and being used to adjust the fiber grating；The fiber Bragg grating (FBG) demodulator with it is described
Fiber grating packaging arrangement connection and close second fixed underpan.
2. the combined long gauge length optical fibre grating strain transducer that prestressing force according to claim 1 can be adjusted accurately,
It is characterized in that, the adjusting component includes: fixed card ring, screwed pipe, force adjustment spiral cover and tenses silk；
The threaded tube is set on the fixed card ring；The force adjustment spiral cover is sheathed on the screwed pipe, and the screw thread
Pipe is threadedly engaged with the force adjustment spiral cover；Described one end for tensing silk is arranged on the fiber grating packaging arrangement, and this junction
Positioned at the outside of second fixed underpan, the other end for tensing silk is in the fiber grating packaging arrangement and the fixed card ring
Between gap be pierced by, be fixed on the force adjustment spiral cover.
3. the combined long gauge length optical fibre grating strain transducer that prestressing force according to claim 2 can be adjusted accurately,
It is characterized in that, the length of the fixed card ring is greater than the length of the force adjustment spiral cover, and the length of the force adjustment spiral cover is greater than described
The length of screwed pipe.
4. the combined long gauge length optical fibre grating strain transducer that prestressing force according to claim 2 can be adjusted accurately,
It is characterized in that, the adjusting component further include: pointer 24；The outside of the fixed card ring is arranged in the pointer 24, and close
The top of the force adjustment spiral cover；
The top of the force adjustment spiral cover is provided with scale, and the pointer 24 is used to indicate the adjusting scale for adjusting component.
5. the combined long gauge length optical fibre grating strain transducer that prestressing force according to claim 2 can be adjusted accurately,
It is characterized in that, second fixed underpan is provided with interior annular groove and outer annular groove in the side far from the first fixed underpan, institute
State the inside that interior annular groove is located at the outer annular groove；
The fixed card ring and the screwed pipe are arranged on second fixed underpan by the interior annular groove.
6. the combined long gauge length optical fibre grating strain transducer that prestressing force according to claim 5 can be adjusted accurately,
It is characterized in that, further includes: protection cap；The protection cap is arranged on second fixed underpan by the outer annular groove, institute
Protection cap is stated for adjusting component described in seal protection.
7. the combined long gauge length optical fibre grating strain transducer that prestressing force according to claim 1 can be adjusted accurately,
It is characterized in that, the fiber grating packaging arrangement includes: fiber grating and protective layer；The protective layer is sheathed on the fiber grating
On, the fiber grating is connect with the fiber Bragg grating (FBG) demodulator.
8. the combined long gauge length optical fibre grating strain transducer that prestressing force according to claim 1 can be adjusted accurately,
It is characterized in that, further includes: protective shell；The protective shell is sheathed on the fiber grating packaging arrangement, and one end of the protective shell
It is arranged on first fixed underpan, the other end of the protective shell is arranged on second fixed underpan.
9. the combined long gauge length optical fibre grating strain transducer that prestressing force according to claim 7 can be adjusted accurately,
It is characterized in that, the protective layer is the casing of polytetrafluoroethylene (PTFE) production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910148987.4A CN110044287A (en) | 2019-02-28 | 2019-02-28 | The combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910148987.4A CN110044287A (en) | 2019-02-28 | 2019-02-28 | The combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110044287A true CN110044287A (en) | 2019-07-23 |
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| CN201910148987.4A Pending CN110044287A (en) | 2019-02-28 | 2019-02-28 | The combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110865097A (en) * | 2019-10-23 | 2020-03-06 | 上海建工四建集团有限公司 | Sensor for monitoring surface layer falling and application method thereof |
| CN113340223A (en) * | 2021-06-02 | 2021-09-03 | 桂林理工大学 | Fiber grating strain sensor with adjustable measuring range and preparation and use methods thereof |
| CN115096484A (en) * | 2022-06-21 | 2022-09-23 | 唐山市神州科贸有限公司 | Force measuring device and method for bridge stress monitoring |
| CN116697917A (en) * | 2023-04-28 | 2023-09-05 | 齐鲁工业大学(山东省科学院) | Adjustable long gauge length optical fiber distributed strain monitoring device and monitoring and installing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020141700A1 (en) * | 2001-02-22 | 2002-10-03 | Teraxion Inc. | Adjustable athermal package for optical fiber devices |
| CN201527267U (en) * | 2009-10-15 | 2010-07-14 | 同济大学 | Distribution base of structural strain transducer convenient for maintaining and updating |
| KR20120007278A (en) * | 2010-07-14 | 2012-01-20 | 한국광기술원 | Fiber bragg grating sensor apparatus for strain measurement |
| CN203785639U (en) * | 2014-02-10 | 2014-08-20 | 石家庄铁道大学 | Fiber bragg grating strain sensor device |
| CN105403337A (en) * | 2015-11-02 | 2016-03-16 | 武汉理工大学 | Fiber grating bolt stress sensor with pre-stretching device |
| CN209559136U (en) * | 2019-02-28 | 2019-10-29 | 南京智慧基础设施技术研究院有限公司 | The combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately |
-
2019
- 2019-02-28 CN CN201910148987.4A patent/CN110044287A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020141700A1 (en) * | 2001-02-22 | 2002-10-03 | Teraxion Inc. | Adjustable athermal package for optical fiber devices |
| CN201527267U (en) * | 2009-10-15 | 2010-07-14 | 同济大学 | Distribution base of structural strain transducer convenient for maintaining and updating |
| KR20120007278A (en) * | 2010-07-14 | 2012-01-20 | 한국광기술원 | Fiber bragg grating sensor apparatus for strain measurement |
| CN203785639U (en) * | 2014-02-10 | 2014-08-20 | 石家庄铁道大学 | Fiber bragg grating strain sensor device |
| CN105403337A (en) * | 2015-11-02 | 2016-03-16 | 武汉理工大学 | Fiber grating bolt stress sensor with pre-stretching device |
| CN209559136U (en) * | 2019-02-28 | 2019-10-29 | 南京智慧基础设施技术研究院有限公司 | The combined long gauge length optical fibre grating strain transducer that prestressing force can be adjusted accurately |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110865097A (en) * | 2019-10-23 | 2020-03-06 | 上海建工四建集团有限公司 | Sensor for monitoring surface layer falling and application method thereof |
| CN113340223A (en) * | 2021-06-02 | 2021-09-03 | 桂林理工大学 | Fiber grating strain sensor with adjustable measuring range and preparation and use methods thereof |
| CN113340223B (en) * | 2021-06-02 | 2022-12-09 | 桂林理工大学 | Fiber grating strain sensor with adjustable measuring range and preparation and use methods thereof |
| CN115096484A (en) * | 2022-06-21 | 2022-09-23 | 唐山市神州科贸有限公司 | Force measuring device and method for bridge stress monitoring |
| CN116697917A (en) * | 2023-04-28 | 2023-09-05 | 齐鲁工业大学(山东省科学院) | Adjustable long gauge length optical fiber distributed strain monitoring device and monitoring and installing method thereof |
| CN116697917B (en) * | 2023-04-28 | 2024-03-08 | 齐鲁工业大学(山东省科学院) | Adjustable long gauge length optical fiber distributed strain monitoring device and monitoring and installing method thereof |
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