CN207114084U - A kind of novel sensor for testing building enclosure external and internal pressure - Google Patents
A kind of novel sensor for testing building enclosure external and internal pressure Download PDFInfo
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- CN207114084U CN207114084U CN201720526121.9U CN201720526121U CN207114084U CN 207114084 U CN207114084 U CN 207114084U CN 201720526121 U CN201720526121 U CN 201720526121U CN 207114084 U CN207114084 U CN 207114084U
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- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- 239000000835 fiber Substances 0.000 claims abstract description 42
- 238000010276 construction Methods 0.000 claims abstract description 30
- 238000000605 extraction Methods 0.000 claims abstract description 4
- 239000013307 optical fiber Substances 0.000 claims description 9
- 238000005259 measurement Methods 0.000 abstract description 21
- 238000012544 monitoring process Methods 0.000 abstract description 21
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 238000013523 data management Methods 0.000 abstract description 3
- 239000002689 soil Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
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- 239000011162 core material Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000005483 Hooke's law Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000013486 operation strategy Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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- Force Measurement Appropriate To Specific Purposes (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
A kind of novel sensor for testing building enclosure external and internal pressure, including going along with sb. to guard him steel pipe, inner sleeve steel pipe, measured body dynamometry contact, fiber outlet and it is arranged on the test sensing element being connected in inner sleeve steel pipe and with measured body dynamometry contact, the test sensing element is the elastic construction for being embedded with fiber grating, the inner sleeve steel pipe is gone along with sb. to guard him in steel pipe positioned at described, described measured body dynamometry contact is in contact with elastic construction, for the elastic construction being sensitively delivered to the pressure change of outside in test sensing element, cause the change of optic fiber grating wavelength via the deformation for the fiber grating being embedded in test sensing element so as to measure the change of external pressure again；The one end of the fiber grating away from measured body dynamometry contact is connected with fiber outlet, and the fiber outlet is used for the extraction of fiber grating wire.The utility model is corrosion-resistant, real-time monitoring, sensing accuracy height, electromagnetism interference, quasi-distributed monitoring, the absolute measurement of physical quantity, repeatable utilize and is easy to data management.
Description
Technical field
It the utility model is related to optical fiber grating sensing field, pressure monitoring technical field in structure, and in particular to one kind is surveyed
The novel sensor of building enclosure external and internal pressure is tried, test result can be used for the stress and security performance of evaluation structure.
Background technology
If the change information of the ambient pressures such as the Fluid pressure outside engineering structure, soil pressure can be grasped in real time, you can
When there is security risk during structure military service, the several of accident generation are effectively reduced using appropriate engineering reinforcement method in time
Rate, the service life of extending structure.The novel sensor of this test building enclosure external and internal pressure is that a kind of operation strategies are wider
Monitoring device, it is widely used in during the military service such as various traffic engineering, hydraulic engineering, ocean engineering and pipeline engineering
The monitoring of isostructural lateral gradient pressure, did not had special sensor, greatly for pressure test in Underwater Pressure or soil in the past
The existing load cell in part is in water or is vulnerable to external environment influence in soil and causes the decline of measurement accuracy, can be by outer
The erosion of portion's medium and can not long-term work, poor durability.Secondth, the characteristics of not easy to install, is also very prominent, most of instruments
Installation and fixed inconvenient, very flexible in water or in soil, and cannot be changed easily once installation, in reality
Practicality in engineering is very low.
The content of the invention
In order to overcome existing force cell poor durability, be not easy to installation, volume is big, can not measure liquid pressure in real time
The deficiencies of change of power or soil pressure, the purpose of this utility model are to provide one kind by elastic construction and Prague cloth
The combination of glug fiber grating, the accuracy for improving Prague bragg grating and durability simultaneously can be real by the data measured
When export in the database on ground the calculating and the storage that facilitate data test building enclosure external and internal pressure new sensing
Device, have corrosion-resistant, real-time monitoring, sensing accuracy height, electromagnetism interference, it is quasi-distributed monitor, the absolute measurement of physical quantity, can
The characteristics of reusing and being easy to data management.
Technical scheme is used by the utility model solves its technical problem：
A kind of novel sensor for testing building enclosure external and internal pressure, it is characterised in that：Including going along with sb. to guard him steel pipe, inner sleeve steel
Pipe, measured body dynamometry contact, fiber outlet and it is arranged on the test being connected in inner sleeve steel pipe and with measured body dynamometry contact and passes
Sensing unit, the test sensing element is the elastic construction for being embedded with fiber grating, and the inner sleeve steel pipe goes along with sb. to guard him steel positioned at described
In pipe, described measured body dynamometry contact is in contact with elastic construction, for the pressure change of outside to be sensitively delivered into survey
The elastic construction in sensing element is tried, then external pressure is measured via the deformation for the fiber grating being embedded in test sensing element
Change；The one end of the fiber grating away from measured body dynamometry contact is connected with fiber outlet, and the fiber outlet is used for light
The extraction of fine grating wire.
Further, the fiber outlet is SMA interfaces.With bandwidth, the characteristics of performance is excellent, highly reliable, long lifespan.
Further, the inner sleeve steel pipe bottom is helicitic texture, and the bottom for going along with sb. to guard him steel pipe is nut structure, by
Set steel pipe, which is fixed on, goes along with sb. to guard him on steel pipe.Make test sensing elements more firm, the inclination that will not cause to test sensing elements is produced
The inaccurate situation of raw external force measurement.
Described steel pipe of going along with sb. to guard him is annular steel pipe, and inner sleeve steel pipe is steel cylindrical tube.Go along with sb. to guard him steel pipe and play fixed and branch
The effect held, described inner sleeve steel pipe can protect the normal work of test sensing element, prevent the external worlds such as outside liquid or the soil body
Erosion of the intrusion of environment to elastic construction and bragg grating, destruction of the external environment condition to test sensing element is prevented,
Play a part of ensureing test sensing element normal work and measurement accuracy；
It is easily installed on the appropriate bearing or tube wall of building enclosure inside and outside wall.According to the demand of measurement accuracy
Change the density of arrangement, can be by arranging multiple novel sensors for testing building enclosure external and internal pressures in the range of different length
To measure the gradient pressure value on the line segment, such as component different depth in the water pressure of different depth, soil on the outside of component in water
Soil pressure etc..
Technical concept of the present utility model is：The novel sensor technology of test building enclosure external and internal pressure is mainly concerned with
The content of three aspects below：(1) to the sensitiveness of extraneous pressure change；(2) high-durability of sensor；(3) ambient pressure
The accuracy of measurement.The ambient pressure value and light of data needed for extraneous soil pressure measure of the change essentially from dynamometry contact transmission
Wavelength change caused by fine grating compression.
Bragg grating is one of sensing element being most widely used at present in intelligent Material Systems research, its
Operation principle is that the change of external physical quantity causes the change of bragg grating centre wavelength, by bragg grating
The change of cardiac wave length obtains measured value.This measuring method clear thinking, simple operation, it is easy to be vast engineering technology
Personnel receive.The advantages of fiber sensing element, is mainly shown as electromagnetism interference；It is corrosion-resistant；Distributed measurement, absolute measurement, letter
Number decay is small；High sensitivity, the advantages that precision is high.In addition, the Real-time security monitoring of structure has turned into research both at home and abroad in recent years
One of focus, the optical fiber technology as monitoring structural health conditions important means has also obtained great development.Therefore present apparatus knot
Close bragg grating the advantages of being perceived and being transmitted, have developed high-durability test building enclosure external and internal pressure it is new
Type sensor, the characteristics of bragg grating monitors the high precision having, good endurance is given full play to, has overcome conventional measurement
The shortcomings that method for testing, the test of different occasion test environments can be subjected to, and meet the needs of different measurement accuracy.
The beneficial effects of the utility model are mainly manifested in：Corrosion-resistant, real-time monitoring, sensing accuracy height, electromagnetism interference,
Quasi-distributed monitoring, the absolute measurement of physical quantity, repeat utilization and be easy to data management.
Brief description of the drawings
Fig. 1 is the profile of the novel sensor of test building enclosure external and internal pressure；
Fig. 2 is the operation principle schematic diagram of the novel sensor of test building enclosure external and internal pressure；
Fig. 3 is the elevational schematic view of the novel sensor of test building enclosure external and internal pressure；
Fig. 4 is the elastic construction of test sensing element.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.
1~Fig. 4 of reference picture, a kind of novel sensor of test building enclosure external and internal pressure, including go along with sb. to guard him steel pipe 2, inner sleeve
Steel pipe 3, measured body dynamometry contact 1, fiber outlet 4 and it is arranged on what is be connected in inner sleeve steel pipe 3 and with measured body dynamometry contact 1
Sensing element is tested, the test sensing element is the elastic construction 5 for being embedded with fiber grating 6, and the inner sleeve steel pipe 3 is located at institute
State and go along with sb. to guard him in steel pipe 2, described measured body dynamometry contact 1 is in contact with elastic construction 5, for the pressure change of outside is sensitive
Ground is delivered to the elastic construction 5 in test sensing element, then the deformation via the fiber grating 6 being embedded in test sensing element
Measure the change of external pressure；The one end of the fiber grating 6 away from dynamometry contact is connected with fiber outlet 4, and the optical fiber goes out
Mouth 4 is used for the extraction of fiber grating wire.
Further, the fiber outlet 4 is SMA interfaces.With bandwidth, the characteristics of performance is excellent, highly reliable, long lifespan.
Further, the bottom of inner sleeve steel pipe 3 is helicitic texture 7, and the bottom for going along with sb. to guard him steel pipe 2 is nut structure,
Inner sleeve steel pipe is fixed on and gone along with sb. to guard him on steel pipe.Make test sensing elements more firm, the inclination for testing sensing elements will not be caused
The inaccurate situation of caused external force measurement.
Further, the fiber grating 6 is bragg grating, the Bradley lattice wave of described bragg grating
It is a length of
λB=2neΛ (1)
In formula, Λ, for the cycle of variations in refractive index；neFor the effective refractive index of fibre core, as Λ and neIn any change
When will all cause the movement of grating wavelength, i.e.,
Known by formula (2), when producing strain in fiber length, make Λ and neChange is produced, causes Prague Bradley
Lattice fiber grating reflection wavelength changes, so as to by detecting λBVariable quantity try to achieve dependent variable to be measured.
Described steel pipe 2 of going along with sb. to guard him is annular steel pipe, and inner sleeve steel pipe 3 is steel cylindrical tube.Go along with sb. to guard him steel pipe and play fixed, branch
The effect held and gone along with sb. to guard him, described inner sleeve steel pipe can protect the normal work of test sensing element, prevent outside liquid or the soil body
Etc. erosion of the intrusion to elastic construction and bragg grating of external environment, prevent external environment condition to test sensing element
Destroy, play a part of ensureing test sensing element normal work and measurement accuracy；
It is easily installed on the appropriate bearing or tube wall of building enclosure inside and outside wall.According to the demand of measurement accuracy
Change the density of arrangement, can be by arranging multiple novel sensors for testing building enclosure external and internal pressures in the range of different length
To measure the gradient pressure value on the line segment, such as component different depth in the water pressure of different depth, soil on the outside of component in water
Soil pressure etc..
The workflow of novel sensor for testing building enclosure external and internal pressure is：
StepA：According to Fig. 2, the novel sensor for testing building enclosure external and internal pressure is fixed on fixed dress
Put or be directly installed on tube wall；
StepB：The change of ambient pressure is transferred to the position of measured body dynamometry contact 1；
StepC：Measured body dynamometry contact is by pressure transmission to elastic construction 5；
StepD：The stress of elastic construction 5 is deformed and by displacement transfer to embedded bragg grating；
StepE：The compressive deformation of bragg grating causes the wavelength of light in bragg grating to change；
StepF：By the size of wavelength change, according to the method for mathematical analysis with regard to certain extraneous pressure value for putting can be calculated to obtain；
StepG：Computer storage and analysis can be exported to the data measured from fiber outlet 4 by wire.
The top of described test sensing element contacts with measured body dynamometry contact 1, other environment such as environmental liquids, soil body
Pressure can make the pressure of dynamometry proximate contacts change, and outside pressure change is transferred to test sensing element by dynamometry contact
The elastic construction of part；
Described elastic construction 5, using highly sensitive material, it can be measured that the minor variations of measurement contact pressure.
In formula, PeFor valid elastic-optic constants, PijFor elasto-optical coefficient, μ is the Poisson's ratio of core material.
Pressure-sensitivity is obtained by (4) formula：
Bragg grating Second Order Sensitivity coefficient is：
Then there is the axial strain ε of bragg grating1Caused wavelength change is：
Error caused by ignoring the second order strain sensitivity of bragg grating is no more than 0.5%, so cloth
The wavelength shift of glug fiber grating and all strain variations are in good linear relationship, do not consider the sensitive of second order strain
Degree influences.
Assuming that apply pressure F along optical fiber axial direction1, axial strain at bragg grating is easily tried to achieve according to Hooke's law
For：
In formula, E1For the Young's modulus of bragg grating, A1Accumulated for the effective cross section of bragg grating, F1
To act on the pressure value on bragg grating.
Then pressure F caused by the wavelength change of bragg grating1Change turn to:
According to the principle of compatibility of deformation, caused by the bragg grating forced compression in inner sleeve steel pipe and elastic construction
Deformation values should be equal：
ε1=ε2 (10)
F=F1+F2 (12)
In formula, ε1For the axial strain of bragg grating, ε2For the axial strain of inner sleeve steel pipe, E1For Prague light
The Young's modulus of fine grating, E2For the Young's modulus of inner sleeve steel pipe, A1Accumulated for the force-bearing surfaces of bragg grating, A2To be interior
Cover the force-bearing surfaces product of steel pipe, F2For the pressure value suffered by inner sleeve steel pipe top, F is the pressure total value of certain extraneous point.
Described fiber outlet, using SMA interfaces, by the data transfer that bragg grating measures to data collecting instrument
In, the pressure value of the point can be learnt according to above-mentioned mechanical analysis method.
The utility model is a kind of novel sensor for testing building enclosure external and internal pressure, suitable on real-time monitoring works
The change value of pressure of certain point, during being on active service to traffic engineering, hydraulic engineering, ocean engineering and pipeline engineering etc.
Structure carry out safety monitoring, can be widely applied in the safety monitoring environment of engineering equipment that is newly-built or having built up, have
High-durability, high-precision, simple in construction, real-time the advantages that monitoring and being easy to engineering laying.
Its operation principle is as follows：By the difference of design requirement, will can be tested when measuring cylindrical equipment inside and outside building enclosure
The novel sensor of pressure is deployed directly on the inside of tube wall, the change value of pressure of certain point on the inside of measurement tube wall, or by that will pass
Sensor is arranged on the change value of pressure that can measure that certain is put under natural environment on instrument.It is outside when external pressure changes
Pressure transmission to elastic construction sends out elastic construction by pressure transmission to measured body dynamometry contact, then by measured body dynamometry contact
Change shape, causes to be embedded in the bragg grating in elastic construction because compression makes its wavelength change, passes through cloth
The signal that the data transfer bundle of lines force cell of glug fiber grating measures is transferred in external data Acquisition Instrument, then passes through letter
Number parsing and mechanical analysis can obtain real-time change value of pressure.
In recent years, the optical fiber as one of most promising sensitive original paper also obtains huge development, is passed compared to electrical type
Sensor, Bragg optical-fiber grating sensor is also more suitable for use in deep water, ground or in the severe rugged environment such as other HTHPs.Mesh
Before, fibre optical sensor is widely used for the fields such as traffic engineering, hydraulic engineering, ocean engineering and pipeline engineering, structure
The health monitoring systems of all -fiber also turn into one of developing goal of monitoring structural health conditions from now on.Point type dynamometry based on optical fiber passes
Sensor is a kind of form with reference to bragg grating dynamometry, and it is the function using bragg grating as sensing element
Property sensor, have other types force cell it is incomparable the advantages of, mainly have good endurance, be applicable to bad environments
The structure such as building water conservancy in pass through the elastic construction changed in test sensing element, inner sleeve steel pipe and measured body dynamometry contact
Rigidity size changes arrangement density of novel sensor of test building enclosure external and internal pressure etc., can easily change survey
The precision or range of amount.With good reliability, anti-electromagnetic interference capability is strong, and easily forms sensing network and be easily installed laying
The advantages that.The collection and storage of data can the platform based on Ali's cloud, accommodate mass data, number of servers can elasticity expand
.
Key technology of the present utility model has：
1st, the utility model is using bragg grating as sensing element, is sensed using measured body dynamometry contact, test
Elastic construction in element and force cell causes this patent to have accurately, in fact as force transmission mechanism, the selection of above element
When, high-durability the characteristics of.
2nd, the novel sensor of the test building enclosure external and internal pressure designed by the utility model can directly monitor soil layer
Thickness change, the pressure change of the fluid pressure in tube wall and other various engineering-environments, and build is compact can make measurement
Position it is more accurate, and the compound of bragg grating and elastic construction causes change of the bragg grating to pressure
It is more accurate and more sensitive to change, therefore in the case of external force change is less, can also be accurately detected the number of external force change
Value.
3rd, the novel sensor of the test building enclosure external and internal pressure designed by the utility model has good sealing
It can be worked with corrosion resistance under any working environment, and arrangement can be changed according to the requirement of measurement accuracy and length
Density.
The technical principle and theoretical foundation of the novel sensor of this test building enclosure external and internal pressure：
Bragg grating is embedded in elastic construction by the utility model, then by elastic construction and Prague Prague
Fiber grating is compound and is integrally put into inner core steel pipe, then inner sleeve steel pipe is connected through a screw thread with going along with sb. to guard him steel pipe.So as to be formed
The novel sensor of one test building enclosure external and internal pressure that can monitor ambient pressure change.
Because inner sleeve with sealing and uses the material with high corrosion resistance so that measurement part has very high
Durability, still there is higher durability in wet condition so as to the scour sensor of this patent.This sensor advantage exists
In corrosion resistance height, sensing accuracy height, electromagnetism interference, quasi-distributed monitoring, the absolute measurement of physical quantity etc..Finally, it is this
Fiber scour sensor be suitable to long term monitoring actual requirement of engineering, and can be designed according to requirement of engineering different accuracy,
The sensor of different ranges.The novel sensor of this test building enclosure external and internal pressure can effectively monitoring works inside configuration
Stressing conditions, and can play a part of giving warning in advance before structure is destroyed.The device sensing element bragg grating,
Force transmission mechanism ingenious in design, simple structure, solves large and small type work using measured body dynamometry contact and internal elastomeric material
The health monitoring problem of journey structure, there is great practical application meaning.
The utility model is related to traffic engineering, hydraulic engineering, ocean engineering and pipeline engineering etc. be on active service during
Structural safety monitoring, it is a kind of pressure test technology being applied under the conditions of special monitoring, and in particular to knot is gone along with sb. to guard him in one kind test
The novel sensor of structure external and internal pressure, test result can be used for the stress and security performance of evaluation structure.
Claims (4)
- A kind of 1. novel sensor for testing building enclosure external and internal pressure, it is characterised in that：Including go along with sb. to guard him steel pipe, inner sleeve steel pipe, Measured body dynamometry contact, fiber outlet and it is arranged on the test sensing element being connected in inner sleeve steel pipe and with measured body dynamometry contact Part, the test sensing element is the elastic construction for being embedded with fiber grating, and the inner sleeve steel pipe is gone along with sb. to guard him in steel pipe positioned at described, Described measured body dynamometry contact is in contact with elastic construction, for the pressure change of outside to be sensitively delivered into test sensing Elastic construction in element, then measure the change of external pressure via the deformation for the fiber grating being embedded in test sensing element Change；The one end of the fiber grating away from dynamometry contact is connected with fiber pigtail mouth, and the fiber pigtail mouth is used for optical fiber The extraction of grating wire.
- 2. the novel sensor of test building enclosure external and internal pressure as claimed in claim 1, it is characterised in that：The optical fiber goes out Mouth is SMA interfaces.
- 3. the novel sensor of test building enclosure external and internal pressure as claimed in claim 1 or 2, it is characterised in that：In described Set steel pipe bottom is helicitic texture, and the bottom for going along with sb. to guard him steel pipe is nut structure, and inner sleeve steel pipe is fixed on and gone along with sb. to guard him on steel pipe.
- 4. the novel sensor of test building enclosure external and internal pressure as claimed in claim 1 or 2, it is characterised in that：Described It is annular steel pipe to go along with sb. to guard him steel pipe, and inner sleeve steel pipe is steel cylindrical tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720526121.9U CN207114084U (en) | 2017-05-12 | 2017-05-12 | A kind of novel sensor for testing building enclosure external and internal pressure |
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| CN201720526121.9U CN207114084U (en) | 2017-05-12 | 2017-05-12 | A kind of novel sensor for testing building enclosure external and internal pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989863A (en) * | 2017-05-12 | 2017-07-28 | 浙江工业大学 | Point type force cell based on fiber grating |
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2017
- 2017-05-12 CN CN201720526121.9U patent/CN207114084U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106989863A (en) * | 2017-05-12 | 2017-07-28 | 浙江工业大学 | Point type force cell based on fiber grating |
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