CN107462365A - A kind of scaling method of fiber grating measuring part - Google Patents
A kind of scaling method of fiber grating measuring part Download PDFInfo
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- CN107462365A CN107462365A CN201710484893.5A CN201710484893A CN107462365A CN 107462365 A CN107462365 A CN 107462365A CN 201710484893 A CN201710484893 A CN 201710484893A CN 107462365 A CN107462365 A CN 107462365A
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- fiber grating
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- measuring part
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of scaling method of fiber grating measuring part, it is characterised in that comprises the following steps：Obtain the wavelength temperature corresponding relation between wavelength change and temperature that fiber grating is measured under free deformation；It is determined that demarcation temperature when measurement fiber grating carries out displacement calibrating, and initial temperature wavelength of the measurement fiber grating when not deformed is determined according to the wavelength temperature corresponding relation；Displacement is applied to the dynamometry end of the base material provided with fiber grating according to the force way of measuring part, obtains the different displacements at base material dynamometry end and corresponding optic fiber grating wavelength；Optic fiber grating wavelength is subtracted into the initial temperature wavelength, obtains after eliminating temperature influence, grating wavelength change and the corresponding relation D between displacement is measured only as caused by displacementi(U)=Δ λi；The precision of force-applying piece checking measurements part using that can fix and to measuring part application deformation.
Description
Technical field
The invention belongs to strain testing technical field, more particularly to a kind of scaling method of fiber grating measuring part.
Background technology
With exploitation and utilization of the mankind to the underground space, underground engineering has turned into the indispensable important set of human lives
Into part.In underground engineering building course, stress field of the surrounding rock directly influences stress and the deformation of structure, is that underground engineering is set
The basic data of meter；Accurate measurement country rock initial field stress and Disturbance stress are the important guarantees of engineering safety.
Aperture deforming method is that development time is most long, a kind of ripe surrouding rock stress method of testing of Technical comparing, is had extensive
Applicability and higher reliability.Traditional aperture deforming method be by measure the deformation of bore diameter calculate perpendicular to
Stress state in the plane of drilling axis, and determine the triaxiality shape of any by three measurements that mutually inequality drills
State.
The use of traditional aperture deformation-sensor is to be passed by the space between colloid filling sensor and country rock to fix
Sensor, because colloid has rheological characteristic, therefore the long term monitoring of crustal stress can not be realized.For direct using rigid measuring part
Contact drilling country rock and then the fiber-optic grating sensor of measurement surrouding rock deformation, due to the measurement accuracy of sensor can not be ensured, because
This can not be used.
The content of the invention
In view of drawbacks described above of the prior art or deficiency, it is expected to provide a kind of demarcation side of fiber grating measuring part
Method, solves the above-mentioned measurement accuracy due to that can not ensure sensor, and can not use can be with the light of direct measurement surrouding rock deformation
The problem of fiber grating sensor.
A kind of scaling method of fiber grating measuring part, comprises the following steps：
Step 1：Obtain wavelength-temperature pair between wavelength change and temperature that fiber grating is measured under free deformation
It should be related to；
Step 2：It is determined that demarcation temperature during measurement fiber grating progress displacement calibrating, and closed according to wavelength-temperature is corresponding
System determines initial temperature wavelength of the measurement fiber grating when not deformed；
Step 3：Displacement is applied to the dynamometry end of the base material provided with fiber grating according to the force way of measuring part, obtained
The different displacements at base material dynamometry end and corresponding optic fiber grating wavelength；
Step 4：Optic fiber grating wavelength is subtracted into initial temperature wavelength, obtains after eliminating temperature influence, is only caused by displacement
Measurement grating wavelength change displacement between corresponding relation Di(U)=Δ λi；
Step 5：The precision of force-applying piece checking measurements part using that can fix and to measuring part application deformation：
The measuring part for being connected with (FBG) demodulator is fixed in force-applying piece, applies setting load to force-applying piece, so that surveying
Environment temperature when measuring component undergoes deformation, and determining to check,
The wavelength of fiber grating is measured, utilizes the corresponding relation D in wavelength-temperature relation and step 4 in step 1i(U)
=Δ λiObtain measurement displacement U corresponding with measuring parti, utilize the modulus of elasticity of force-applying piece, Poisson's ratio, measurement displacement Ui, obtain
To the corresponding measurement load suffered by force-applying piece, when set load and measure the relative error of load be less than setting error when,
The precision of measuring part is qualified.
The force side of force-applying piece is identical with the deformation of measuring part, therefore measures displacement UiThe as survey of force-applying piece force side
Quantitative change shape.The situation of change that the measurement is deformed by optic fiber grating wavelength calculates gained, is the measured value of measuring part.Utilize
The mechanics parameter of the measured value and force-applying piece, inverse go out the measurement load being applied on force-applying piece, the measurement load and actually apply
Difference between the setting load being added on force-applying piece shows the levels of precision of measuring part.Profit can ensure to survey in this way
The measurement accuracy of part is measured, so as to ensure application of the measuring part in drilling surrouding rock deformation measurement.
In step 1, the process for carrying out temperature calibration is：Measurement fiber grating is placed in adjustable thermostatic case, recorded
Optic fiber grating wavelength under each equilibrium temperature, and the relationship expression between measurement grating wavelength and temperature is obtained by Mathematical Fitting
Formula.
In step 2 and step 5, demarcate temperature and environment temperature is determined by temperature compensation grating：Read temperature compensation grating
Wavelength, by temperature compensation optic fiber grating wavelength and the corresponding relation of temperature, it is determined that corresponding temperature.Mark is measured using temperature compensation grating
Constant temperature degree and environment temperature, easy to operate, cost is cheap, and precision is higher.
In step 3, the base material of measuring part is steel loop, and dynamometry end is two power transmission caps for being fixed at steel loop outer surface,
The diametrically contraposition of two power transmission shade steel loops, displacement is applied to two power transmission caps by displacement calibrating frame, and then applied
Displacement and the wavelength of corresponding measurement grating.Displacement is applied by power transmission cap of the displacement calibrating valency to measuring part, can true mould
Intend force-bearing situation of the base material in monitoring so that the result of demarcation is more accurate.
The shift value that displacement calibrating frame applies to power transmission cap, the maximum stress level and the mechanics of structure estimated according to scene
Parameter determines.
In step 5, force-applying piece is uniform in material, isotropic lucite cuboid, is provided with and runs through in cuboid
Property circular hole；Measuring part is provided with shell, and the middle part of housing is cylindrical portions, and the afterbody of housing has the expansion that section gradually increases
Portion, measuring part are circumferentially fixed on cylinder portion, and power transmission cap protrudes from the outside of housing；The enlarged portion of shell, which is clamped on, passes through
In wearing property circular hole, the initial spacing between two power transmission caps is more than the diameter of penetrability circular hole, steel loop is had precompressed amount.Steel loop
With precompressed amount, it is ensured that the accuracy of demarcation.Force-applying piece uses isotropic cuboid, more accurately can survey inverse
Load is measured, the penetrability circular hole in force-applying piece, can be very good situation of the simulation tunnel metamorphosis to measuring part.
In step 5, four measuring parts are provided with shell simultaneously, the offset angular at the dynamometry end of each measuring part is along ring
To being uniformly distributed, when calculating the stress of cylindrical structure, generally require to measure two mutually perpendicular power and one with this two
Individual power is in 45 ° of power, and calculates 3 isolated components, Ke Yixiang using the value of these three power as isolated component, 4 measured values
Mutually check and then improve the accuracy of demarcation.
In step 5, setting load is applied to two surfaces of the plane perpendicular to penetrability round hole axial of force-applying piece, it is right
The setting load of both direction carries out various combination, after pressure stability, then carries out the linear unloading of load.Reason can directly be utilized
Measurement load is calculated by formula.Multigroup setting load can improve the accuracy of demarcation.
Scaling method also includes the long-time stability of checking measurements part, is more than setting time when the monitoring time of sensor
Afterwards, measure grating change to can be ignored and relatively stablized, then the long-time stability of sensor are qualified.
The maximum relative deformation that may occur is applied to each steel loop by power transmission cap, then, keeps applying relative deformation
Constant, if in setting time, moderate finite deformation occurs for measurement grating, then the long-time stability of measuring part are unqualified.
The technical scheme provided according to the embodiment of the present application, due to same fiber grating is fixed on base material, due to
Grating welds and the difference of base material individual, different matrix structure forms can have different optic fiber grating wavelength-temperature-base materials
The corresponding relation of deformation.By the scaling method of the fiber grating measuring part, the distinctive base of each measuring part can be directed to
Material attribute and its structure type, the corresponding relation of substrate deformation and grating wavelength after the temperature that is eliminated influence, with reference to autonomous
The check method of design, ensure accuracy and accuracy of the measuring part to deformation measurement.
As can be seen here, the technical scheme that the application provides can ensure that structure depths is not easy directly to fix sensor, needs
The measurement accuracy of the sensor of direct measurement structure depths deformation, is asked so as to solve the technology in background technology in the prior art
Topic.
Brief description of the drawings
By reading the detailed description made to non-limiting example made with reference to the following drawings, the application's is other
Feature, objects and advantages will become more apparent upon：
Fig. 1 is sensor construction top view；
Fig. 2 is sensor construction front view；
Fig. 3 is that steel loop and grating arrange sectional drawing；
Fig. 4 is temperature and temperature compensation grating trial curve and relationship；
Fig. 5 is temperature and the trial curve and relationship of No. 1 first fiber grating；
Fig. 6 is steel loop deformation and the trial curve and relationship of No. 1 first fiber grating；
Fig. 7 is that lower No. 1 first optic fiber grating wavelength of 0.6mm deformation conditions changes over time trial curve；
Wherein, 1- stainless steel casings, 2- hold-down supports, 3- steel loops, 4- power transmission caps, the fiber gratings of 5- first, 6- temperature compensations
Grating, 7- armored optical cables.
Embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
It is easy to describe, the part related to invention is illustrate only in accompanying drawing.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Sensor is a certain specific structure type used by the present embodiment, every to utilize the setting optical fiber light on base material
Grid, the deformation of base material is directly resulted in by the deformation of geodesic structure, become using the change of wavelength corresponding to fiber grating to measure base material
The scaling method of the measuring part of shape, this method can be used, and within the protection domain of the application.
For the ease of understanding scaling method, now by taking a specific fiber grating aperture deformation-sensor as an example as saying
It is bright.The sensor includes stainless steel casing 1, hold-down support 2, steel loop 3, power transmission cap 4, measurement grating, temperature compensation grating 6, armouring light
Cable 7.Stainless steel casing 1 is stainless steel, and hold-down support 2 is bolted in the cavity of stainless steel casing 1, fixed branch
Seat 2 sets annular groove in the opening position of steel loop 3, and for fixing four steel loops 3, center drum is as optical-fibre channel.
Steel loop 3 is fixed on hold-down support 2, arranged in parallel in the axial direction, be planar uniformly distributed (0 °, 45 °,
90 °, 135 °).The displacement of steel loop 3 is limited by hold-down support 2, can only radial deformation and can not rotate.Power transmission cap 4 is stainless
Steel material, front end are hemispherical, are contacted with country rock；Rear end is cylinder, is contacted with steel loop 3, by surrouding rock deformation during experiment
It is transferred on steel loop 3.There are 1 measurement grating, positioned at the outer surface of steel loop 3, position and 4 folder in 90 ° of power transmission cap on each steel loop 3
Angle.Temperature compensation grating 6 is located at the rear end of stainless steel casing 1, in free deformation.4 measurement gratings and 1 temperature compensation grating 6 exist
Sensor rear end and the welding of armored optical cable 7.Eliminating influence of the temperature change to measurement grating wavelength change using temperature compensation grating is
Ordinary skill in the art means, will not be repeated here.
The scaling method of fiber grating aperture deformation-sensor includes：
(1) temperature calibration of grating：Place a sensor in adjustable thermostatic case, then be adjusted to demarcate by temperature minimum
Temperature value, connect optical fibre interrogation instrument.After temperature is constant, now calorstat temperature, the first fiber grating 5 and temperature compensation grating are recorded
6 wavelength；Then increase calorstat temperature, after temperature stabilization, record the wavelength of corresponding temperature and each grating again；Using phase
Calorstat temperature is continuously increased with method until reaching highest demarcation temperature.So as to obtain the wavelength of temperature compensation grating 6 and temperature T's
Relation curve λT- T (Fig. 4), and the wavelength of each first fiber grating 5 and the relation curve of temperature
(No. 1 first fiber grating 5 is provided in Fig. 5Relation curve).By Mathematical Fitting obtain the wavelength of temperature compensation grating 6 with
Relational expression f (T)=λ between temperatureT=0.01054T+1550.192 (Fig. 4), and the wavelength of each first fiber grating 5
Relational expression between temperatureAs shown in figure 5, the relational expression of No. 1 first fiber grating 5 is：
It is worth noting that, for the sensor provided with multiple first fiber gratings 5 and provided with temperature compensation grating 6 simultaneously, will
It is put into insulating box simultaneously tests optic fiber grating wavelength-temperature relation together, and more convenient, this is only a kind of preferred scheme.
(2) displacement calibrating of grating：Place a sensor on displacement calibrating frame and connect optical fibre interrogation instrument.Read temperature compensation
The wavelength of grating 6By f (the T)=λ obtained in step (1)T=0.01054T-1550.192, is calculated
To demarcation temperature T0=12.8 DEG C.Further according to what is obtained in step (1)4 the first light at this temperature is calculated
The initial wavelength of fine grating 5For example, the initial wavelength of the 1st the first fiber grating 5 is
The maximum stress level and ROCK CONDITIONS estimated according to scene, aperture maximum distortion are no more than 0.6mm, therefore, this
Dominant bit pipettes 0.6mm in secondary displacement calibrating.Choose No. 1 steel loop 3, a pair of power transmission caps 4 by displacement calibrating frame to its both ends
Apply displacement, the displacement of application rises to 0.6mm from zero linear, is then down to zero again from maximum；Record applies displacement U and the
The corresponding wavelength X 1 of one fiber grating 5, relation curve is as shown in Figure 6.The wavelength X 1 of first fiber grating 5 is subtracted into primary wave
It is longWavelength change and the relation curve of displacement only as caused by displacement are obtained
Relational expression Δ λ caused by displacement between the wavelength change of the first fiber grating 5 and displacement is obtained by Mathematical Fitting1=D1
(U)=6.0686U-0.01314.Its excess-three steel loop 3 is demarcated using same method, obtains corresponding relational expression
Di(U)=Δ λi。
(3) sensor accuracy is checked：Uniform in material, isotropic plexiglass block is chosen as force-applying piece, its size
For 30cm*30cm*30cm, wherein that opens a diameter of 36mm in the center of one side runs through circular hole.Place a sensor at circle
Kong Zhong, because Circularhole diameter is less than the distance between both ends power transmission cap 4 of steel loop 3, after being put into circular hole, steel loop 3 has certain initial
Decrement.Now the contact point of circular hole hole wall and power transmission cap is the force side of steel loop in plexiglass block.Sensor is connected
(FBG) demodulator, the wavelength of each grating is recorded by computer.Plexiglass block is placed on rigid servo-pressing machine, hung down
Directly apply pressure P respectively in the both direction in round hole axial plane1=10MPa and P2=0MPa (the stress levels of both direction
Various combination can be carried out).
After the completion of to be measured, according to the wavelength of temperature compensation grating 6 recorded during experimentAgain by
F (the T)=λ obtained in step (1)T, determine environment temperature T1=12.24 DEG C (demarcation temperature is identical with test temperature).According to ring
Border temperature T1And obtained in step (1)Each first fiber grating 5 under the conditions of the test temperature is calculated
Initial wavelengthSuch as the primary wave of the 1st grating is：It is each according to what is recorded during experiment
The wavelength X of first fiber grating 5iObtain the wavelength change only as caused by external forceThe wavelength change of No. 1 grating
For Δ λ1=2.012nm.D by being obtained in step (2) againi(U)=Δ λiObtain the displacement U between four power transmission caps 4 of steel loop 3i,
Such as two end movements of No. 1 grating are U1=0.334mm.During force, the hole wall of circular hole becomes among plexiglass block
Deformation between shape and opposed power transmission cap is identical, therefore the measurement displacement U between power transmission cap1As plexiglass block hole wall
Measurement deformation.The compression test of lucite is carried out using rigid servo-pressing machine, the modulus of elasticity for obtaining lucite is
2.7GPa, Poisson's ratio 0.3.
According to the displacement of power transmission cap 4 and the elastic parameter of lucite, using Elasticity knowledge, it is calculated in plane
Two principal stress σ1=9.2MPa and σ2=0.0MPa and direction.The P applied with experiment1=10MPa and P2=0MPa and direction
It is compared, the relative error for examining sensor is 4.7%, meets required precision.
(4) sensor long-time stability are checked
The both ends of steel loop 3 are applied with 0.6mm displacement, it is and stabilized, by the change detection sensor of wavelength it is long-term surely
It is qualitative.From figure 7 it can be seen that in the time for applying 192 hours, grating wavelength has almost no change, it was demonstrated that the sensor
With good long-time stability, the requirement of long term monitoring can adapt to.
It is for more convenient easy measurement the it is worth noting that, above-mentioned the step of being demarcated on temperature compensation grating 6
The real time temperature of one fiber grating 5.When the temperature of the first fiber grating 5 can be obtained using other modes, for example directly exist
Related experiment, or the temperature using thermometer direct measurement 5 environmental effects of the first fiber grating are done in insulating box, then on temperature
The correlation step of light filling grid 6 can be omitted.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.People in the art
Member should be appreciated that invention scope involved in the application, however it is not limited to the technology that the particular combination of above-mentioned technical characteristic forms
Scheme, while should also cover in the case where not departing from the inventive concept, carried out by above-mentioned technical characteristic or its equivalent feature
The other technical schemes for being combined and being formed.Such as features described above has similar work(with (but not limited to) disclosed herein
The technical scheme that the technical characteristic of energy is replaced mutually and formed.
Claims (10)
1. a kind of scaling method of fiber grating measuring part, it is characterised in that comprise the following steps：
Step 1：Obtain free deformation under measure fiber grating wavelength change and temperature between wavelength-temperature it is corresponding pass
System；
Step 2：It is determined that demarcation temperature during measurement fiber grating progress displacement calibrating, and closed according to the wavelength-temperature is corresponding
System determines initial temperature wavelength of the measurement fiber grating when not deformed；
Step 3：Displacement is applied to the dynamometry end of the base material provided with fiber grating according to the force way of measuring part, obtains base material
The different displacements at dynamometry end and corresponding optic fiber grating wavelength；
Step 4：Optic fiber grating wavelength is subtracted into the initial temperature wavelength, obtains after eliminating temperature influence, is only caused by displacement
Measurement grating wavelength change displacement between corresponding relation Di(U)=Δ λi；
Step 5：The precision of force-applying piece checking measurements part using that can fix and to measuring part application deformation：By institute
Measuring part is stated fixed in the force-applying piece, applies setting load to the force-applying piece, so that the measuring part occurs
Environment temperature when deforming, and determining to check, measures the wavelength of fiber grating, utilizes the wavelength-temperature relation in step 1
With the corresponding relation D in step 4i(U)=Δ λiObtain measurement displacement U corresponding with the measuring parti, using described
Modulus of elasticity, Poisson's ratio, the measurement displacement U of force-applying piecei, the corresponding measurement load suffered by the force-applying piece is obtained,
When the relative error of the setting load and measurement load is less than setting error, the precision of the measuring part is qualified.
A kind of 2. scaling method of fiber grating measuring part according to claim 1, it is characterised in that：In step 1, enter
The process of the row temperature calibration is：The measurement fiber grating is placed in adjustable thermostatic case, records each equilibrium temperature
Under optic fiber grating wavelength, and obtain by Mathematical Fitting measuring the relational expression between grating wavelength and temperature.
A kind of 3. scaling method of fiber grating measuring part according to claim 1, it is characterised in that：Step 2 and step
In rapid 5, the demarcation temperature and the environment temperature are determined by temperature compensation grating：The wavelength of temperature compensation grating is read, is passed through
The corresponding relation of temperature compensation optic fiber grating wavelength and temperature, it is determined that corresponding temperature.
A kind of 4. scaling method of fiber grating measuring part according to claim 1, it is characterised in that：In step 3, institute
The base material for stating measuring part is steel loop, and the dynamometry end is two power transmission caps for being fixed at the steel loop outer surface, two institutes
The diametrically contraposition of steel loop described in power transmission shade is stated, displacement is applied to two power transmission caps by displacement calibrating frame, and then obtain
The displacement of application and the wavelength of corresponding measurement grating.
A kind of 5. scaling method of fiber grating measuring part according to claim 4, it is characterised in that：The displacement mark
Determine the shift value that frame applies to power transmission cap, the maximum stress level and the mechanics parameter of structure estimated according to scene determine.
A kind of 6. scaling method of fiber grating measuring part according to claim 4, it is characterised in that：In step 5, institute
It is uniform in material, isotropic lucite cuboid to state force-applying piece, and penetrability circular hole is provided with the cuboid；It is described
Measuring part is provided with shell, and the middle part of the housing is the cylindrical portions, and there is the afterbody of the housing section gradually to increase
Enlarged portion, the measuring part is circumferentially fixed on the cylinder portion, and the power transmission cap protrudes from the outer of the housing
Side；The enlarged portion of the shell is clamped in the penetrability circular hole, and the initial spacing between two power transmission caps is more than institute
The diameter of penetrability circular hole is stated, makes the steel loop that there is precompressed amount.
A kind of 7. scaling method of fiber grating measuring part according to claim 6, it is characterised in that：In step 5, institute
State in shell while be provided with four measuring parts, the offset angular at the dynamometry end of each measuring part is circumferentially uniform
Distribution.
A kind of 8. scaling method of fiber grating measuring part according to claim 6, it is characterised in that：It is right in step 5
Two surfaces of the plane perpendicular to the penetrability round hole axial of the force-applying piece apply the setting load, to two sides
To the setting load carry out various combination, after pressure stability, then carry out the linear unloading of load.
A kind of 9. scaling method of fiber grating measuring part according to claim 1, it is characterised in that：Scaling method is also
Long-time stability including checking the measuring part, after the monitoring time of the sensor setting time is more than, measure light
Grid change can be ignored and stablize relatively, then the long-time stability of the sensor are qualified.
A kind of 10. scaling method of fiber grating measuring part according to claim 9, it is characterised in that：By described
Power transmission cap applies the maximum relative deformation that may occur to each steel loop, then, keeps application relative deformation constant, if
In setting time, moderate finite deformation occurs for measurement grating, then the long-time stability of the measuring part are unqualified.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692838A (en) * | 2018-03-19 | 2018-10-23 | 中车青岛四方机车车辆股份有限公司 | The measurement method of wheel seat circumferential stress and the calibration tooling for measuring wheel seat circumferential stress |
| CN108871222A (en) * | 2018-08-06 | 2018-11-23 | 中国科学院武汉岩土力学研究所 | A kind of wide range fiber grating aperture deformation gauge and its check method |
| CN109990818A (en) * | 2018-11-30 | 2019-07-09 | 东莞理工学院 | A kind of fiber-optic grating sensor marking apparatus |
| CN111780921A (en) * | 2020-08-07 | 2020-10-16 | 中国科学院武汉岩土力学研究所 | Calibration method of fiber bragg grating three-dimensional stress monitoring sensor |
| CN114166118A (en) * | 2021-11-26 | 2022-03-11 | 哈尔滨工程大学 | Optical fiber shape sensing arrangement angle self-calibration method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359765A (en) * | 2011-09-15 | 2012-02-22 | 中国科学院半导体研究所 | Component-type optical fiber drilling deformeter |
| CN203310554U (en) * | 2013-06-26 | 2013-11-27 | 黄河勘测规划设计有限公司 | Three-component dual-ring borehole deformeter |
| CN105716787A (en) * | 2016-02-19 | 2016-06-29 | 云南电网有限责任公司电力科学研究院 | Calibration method of fiber grating pressure sensor |
-
2017
- 2017-06-23 CN CN201710484893.5A patent/CN107462365A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359765A (en) * | 2011-09-15 | 2012-02-22 | 中国科学院半导体研究所 | Component-type optical fiber drilling deformeter |
| CN203310554U (en) * | 2013-06-26 | 2013-11-27 | 黄河勘测规划设计有限公司 | Three-component dual-ring borehole deformeter |
| CN105716787A (en) * | 2016-02-19 | 2016-06-29 | 云南电网有限责任公司电力科学研究院 | Calibration method of fiber grating pressure sensor |
Non-Patent Citations (4)
| Title |
|---|
| 丁振良: "《仪器精度理论》", 30 September 2015 * |
| 刘继光: "36-2型钻孔变形计的组装工艺及现场使用", 《岩土力学》 * |
| 孙丽: "光纤光栅传感技术与工程应用研究", 《中国博士学位论文全文数据库》 * |
| 胡斌: "一次套钻确定三维地应力的新型钻孔变形计", 《岩土力学》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692838A (en) * | 2018-03-19 | 2018-10-23 | 中车青岛四方机车车辆股份有限公司 | The measurement method of wheel seat circumferential stress and the calibration tooling for measuring wheel seat circumferential stress |
| CN108871222A (en) * | 2018-08-06 | 2018-11-23 | 中国科学院武汉岩土力学研究所 | A kind of wide range fiber grating aperture deformation gauge and its check method |
| CN109990818A (en) * | 2018-11-30 | 2019-07-09 | 东莞理工学院 | A kind of fiber-optic grating sensor marking apparatus |
| CN109990818B (en) * | 2018-11-30 | 2021-02-02 | 东莞理工学院 | Fiber grating sensor calibration instrument |
| CN111780921A (en) * | 2020-08-07 | 2020-10-16 | 中国科学院武汉岩土力学研究所 | Calibration method of fiber bragg grating three-dimensional stress monitoring sensor |
| CN111780921B (en) * | 2020-08-07 | 2021-05-11 | 中国科学院武汉岩土力学研究所 | Calibration method of fiber bragg grating three-dimensional stress monitoring sensor |
| CN114166118A (en) * | 2021-11-26 | 2022-03-11 | 哈尔滨工程大学 | Optical fiber shape sensing arrangement angle self-calibration method |
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