CN205826693U - A kind of high frequency FBG acceleration transducer of stainless steel capillary and Polymer sensitization structure - Google Patents
A kind of high frequency FBG acceleration transducer of stainless steel capillary and Polymer sensitization structure Download PDFInfo
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- CN205826693U CN205826693U CN201620570542.7U CN201620570542U CN205826693U CN 205826693 U CN205826693 U CN 205826693U CN 201620570542 U CN201620570542 U CN 201620570542U CN 205826693 U CN205826693 U CN 205826693U
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- stainless steel
- steel capillary
- optical fiber
- polymer
- fiber bragg
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 57
- 239000010935 stainless steel Substances 0.000 title claims abstract description 57
- 229920000642 polymer Polymers 0.000 title claims abstract description 39
- 230000001133 acceleration Effects 0.000 title claims abstract description 20
- 206010070834 Sensitisation Diseases 0.000 title claims abstract description 13
- 230000008313 sensitization Effects 0.000 title claims abstract description 13
- 239000013307 optical fiber Substances 0.000 claims abstract description 45
- 229950000845 politef Drugs 0.000 claims abstract description 15
- 239000007943 implant Substances 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000009795 derivation Methods 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 11
- 239000011888 foil Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
This utility model relates to the high frequency FBG acceleration transducer of a kind of stainless steel capillary and Polymer sensitization structure, belongs to technical field of electronic measurement.This utility model includes that politef fixes shell, stainless steel capillary, optical fiber Bragg raster, derivation optical fiber, resilient blade；Outside described stainless steel capillary, both sides are fixed on politef and are fixed in shell hollow cylinder, it is pasted onto in resilient blade after optical fiber Bragg raster prestretched, the resilient blade being pasted with optical fiber Bragg raster puts into stainless steel capillary central authorities, derives optical fiber and draws from stainless steel capillary both sides.This utility model can realize high-sensitivity measurement on the basis of higher frequency of vibration；The design is capable of minute diameter encapsulation, goes for carrying out vibration monitoring in the measurement object that installing space is less；By using optical fiber Bragg raster, there is stronger anti-electromagnetic interference capability and corrosion resistance is applicable to the long term monitoring to transformator；Simple in construction, it is simple to operation.
Description
Technical field
This utility model relates to the high frequency FBG acceleration transducer of a kind of stainless steel capillary and Polymer sensitization structure,
Belong to technical field of electronic measurement.
Background technology
The work under bad environment of power transformer, and its work efficiency ratio is relatively low, therefore there is the biggest leakage field, is formed relatively
Strong electromagnetic interference, the operating temperature of power transformer is the highest, even shell is likely to reach the high temperature of about 70 degree.Transformation
The vibration monitoring environment of device is in the adverse circumstances of high voltage, highfield, high-temperature, and the vibration frequency range of transformator is substantially
10～2000Hz.The sensor being presently available for transformator vibration detection is substantially electromagnetic sensor, common are electricity
Eddy current sensor, piezoelectric transducer etc., its common feature is exactly that anti-electromagnetic interference capability is poor, and signal remote transmission ability is weak.
Fibre Optical Sensor have essential safety, have electromagnetism interference, signal can the advantage such as long-distance transmissions, become in recent years
Carry out the focus of scholar's research.Have natural although Fibre Optical Sensor carries out transformator vibration online monitoring in strong electromagnetic environment
Advantage, but current Fibre Optical Sensor is used for the detection of static amount, such as fire alarm, strain measurement etc., can be used for dynamically
The sensor measured is considerably less, and optical fibre grating acceleration sensor is a current study hotspot.Various fiber gratings accelerate
Degree sensor quickly grows and of a great variety.Cantilever beam type optical fibre grating acceleration transducer is steady because of its simple in construction performance
Fixed, obtain the favor of numerous scholar, from the initial stage, grating has been attached directly to cantilever beam and spreads out to it and stretch structure (as fix at 2
Formula), but cantilever beam self is difficult to high-frequency range and measures, and majority can only be applied in low-frequency range, hinders its development.
By using optical fiber Bragg raster high frequency acceleration transducer that power transformer is carried out real-time online vibration monitoring
Time, need to consider the composition of acceleration transducer, encapsulation diameter and material.
Summary of the invention
This utility model provides the high frequency FBG acceleration sensing of a kind of stainless steel capillary and Polymer sensitization structure
Device and using method thereof, for solving to pass optical fiber Bragg raster high frequency acceleration during transformator vibration real-time online detection
The structure of sensor, the problem of installation.
The technical solution of the utility model is: the high frequency FBG of a kind of stainless steel capillary and Polymer sensitization structure accelerates
Degree sensor, fixes shell 1, stainless steel capillary 2, optical fiber Bragg raster 3 including politef, derives optical fiber 4, elasticity
Foil 6；
Outside described stainless steel capillary 2, both sides are fixed on the politef that external diameter is 5mm and are fixed shell 1 hollow cylinder
In, it is pasted onto in resilient blade 6 after 1000 microstrains of optical fiber Bragg raster 3 prestretched, is pasted with fiber Bragg
The resilient blade 6 of grating 3 puts into stainless steel capillary 2 central authorities that internal diameter is 0.8mm, derives optical fiber 4 from Stainless Steel Capillary
Pipe 2 both sides are drawn.
Described resilient blade 6 both sides are respectively embedded in the Polymer implant being positioned at both sides in stainless steel capillary 2
I 5, in Polymer implant II 7.
Described Polymer implant I 5, Polymer implant II 7 are to pour into from the both sides of stainless steel capillary 2
Polymer liquid also solidifies.
Operation principle of the present utility model is:
Computational analysis simply supported beam vibrated according to the mechanics of materials, natural frequency f of simply supported beam0It is represented by:
Wherein: l is the length of stainless steel capillary 2, E is stainless steel capillary 2 elastic modelling quantity, and I is the moment of inertia, and ρ is not
Rust steel wool tubule 2 density, s is the cross-sectional area of stainless steel capillary 2.
Stainless steel capillary 2 drive Polymer implant I 5, Polymer implant II 7 and and Polymer connect
Resilient blade 6 is vibrated together, and resilient blade 6 causes strain stress produced by optical fiber Bragg raster 3 and surveyed acceleration
The relation of degree a is represented by:
In formula: m is the quality of resilient blade 6, l1For the length of resilient blade 6, b is resilient blade 6
Width, h is the thickness of resilient blade 6, E1Elastic modelling quantity for resilient blade 6.
The relation of the strain stress of the optical fiber Bragg raster 3 being pasted onto in resilient blade 6 and wavelength variable quantity Δ λ can table
It is shown as:
Δ λ=(1-Pe)λε (3)
In formula: PeFor the valid elastic-optic constants of optical fiber Bragg raster 3, λ is the centre wavelength of optical fiber Bragg raster 3.
Simultaneous formula (2), the sensitivity of (3) sensor can be expressed as:
(4) formula can be converted into:
In formula: ρ1For the density of resilient blade 6, s1Cross-sectional area for resilient blade 6.
The beneficial effects of the utility model are:
1, being fixed on object under test and when vibrating with object when sensor, stainless steel capillary will drive
Polymer implant is vibrated together, and Polymer implant is delivered to foil vibration signal and makes FBG make strain variation,
The wavelength causing fiber grating is produced corresponding change, and then causes the change of FBG bragg wavelength, the acceleration letter of vibration
Number it is modulated to the variable signal of wavelength.The design selects stainless steel capillary and uses Polymer implant and foil
Carry out vibration transmission, it is possible on the basis of higher frequency of vibration, realize high-sensitivity measurement.
2, the design is capable of minute diameter encapsulation, goes for shaking in the measurement object that installing space is less
Dynamic monitoring.
3, by using optical fiber Bragg raster, there is stronger anti-electromagnetic interference capability and corrosion resistance be applicable to right
The long term monitoring of transformator.
4, simple in construction, it is simple to operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Each label in figure: 1-politef fixes shell, 2-stainless steel capillary, 3-optical fiber Bragg raster, 4-derivation
Optical fiber, 5-Polymer implant I, 6-resilient blade, 7-Polymer implant II.
Detailed description of the invention
Embodiment 1: as it is shown in figure 1, the high frequency FBG acceleration of a kind of stainless steel capillary and Polymer sensitization structure passes
Sensor, fixes shell 1, stainless steel capillary 2, optical fiber Bragg raster 3 including politef, derives optical fiber 4, elastic metallic
Thin slice 6；
Outside described stainless steel capillary 2, both sides are fixed on the politef that external diameter is 5mm and are fixed shell 1 hollow cylinder
In, it is pasted onto in resilient blade 6 after 1000 microstrains of optical fiber Bragg raster 3 prestretched, is pasted with fiber Bragg
The resilient blade 6 of grating 3 puts into stainless steel capillary 2 central authorities that internal diameter is 0.8mm, derives optical fiber 4 from Stainless Steel Capillary
Pipe 2 both sides are drawn.
Described resilient blade 6 both sides are respectively embedded in the Polymer implant being positioned at both sides in stainless steel capillary 2
I 5, in Polymer implant II 7.
Described Polymer implant I 5, Polymer implant II 7 are to pour into from the both sides of stainless steel capillary 2
Polymer liquid also solidifies.
Embodiment 2: as it is shown in figure 1, the high frequency FBG acceleration of a kind of stainless steel capillary and Polymer sensitization structure passes
Sensor, fixes shell 1, stainless steel capillary 2, optical fiber Bragg raster 3 including politef, derives optical fiber 4, elastic metallic
Thin slice 6；
Outside described stainless steel capillary 2, both sides are fixed on the politef that external diameter is 5mm and are fixed shell 1 hollow cylinder
In, it is pasted onto in resilient blade 6 after 1000 microstrains of optical fiber Bragg raster 3 prestretched, is pasted with fiber Bragg
The resilient blade 6 of grating 3 puts into stainless steel capillary 2 central authorities that internal diameter is 0.8mm, derives optical fiber 4 from Stainless Steel Capillary
Pipe 2 both sides are drawn.
Described resilient blade 6 both sides are respectively embedded in the Polymer implant being positioned at both sides in stainless steel capillary 2
I 5, in Polymer implant II 7.
Embodiment 3: as it is shown in figure 1, the high frequency FBG acceleration of a kind of stainless steel capillary and Polymer sensitization structure passes
Sensor, fixes shell 1, stainless steel capillary 2, optical fiber Bragg raster 3 including politef, derives optical fiber 4, elastic metallic
Thin slice 6；
Outside described stainless steel capillary 2, both sides are fixed on the politef that external diameter is 5mm and are fixed shell 1 hollow cylinder
In, it is pasted onto in resilient blade 6 after 1000 microstrains of optical fiber Bragg raster 3 prestretched, is pasted with fiber Bragg
The resilient blade 6 of grating 3 puts into stainless steel capillary 2 central authorities that internal diameter is 0.8mm, derives optical fiber 4 from Stainless Steel Capillary
Pipe 2 both sides are drawn.
Embodiment 4: as it is shown in figure 1, the high frequency FBG acceleration of a kind of stainless steel capillary and Polymer sensitization structure passes
Sensor, fixes shell 1, stainless steel capillary 2, optical fiber Bragg raster 3 including politef, derives optical fiber 4, elastic metallic
Thin slice 6；
Outside described stainless steel capillary 2, both sides are fixed on the politef that external diameter is 5mm and are fixed shell 1 hollow cylinder
In, it is pasted onto in resilient blade 6 after 1000 microstrains of optical fiber Bragg raster 3 prestretched, is pasted with fiber Bragg
The resilient blade 6 of grating 3 puts into stainless steel capillary 2 central authorities that internal diameter is 0.8mm, derives optical fiber 4 from Stainless Steel Capillary
Pipe 2 both sides are drawn.
Its design parameter is:
1, stainless steel capillary parameter is: length l=50mm of stainless steel capillary 2, and Young ' s modulus is E
=194GPa, ρ=7.9*103kg/m3, outer diameter D=1.4mm, internal diameter d=0.8mm；
2, resilient blade parameter is: the length of resilient blade: l1=10mm, the width b of resilient blade
=0.05mm, the thickness h=0.01mm of resilient blade, the cross-sectional area s of resilient blade1=b*h, elastic metallic is thin
The density p of sheet1=7.9*103kg/m3。
3, the technical parameter of optical fiber Bragg raster is: central wavelength lambda=1550nm, Sε=1-Pe=0.78*10(-6)με-1；
4, by accompanying drawing 1 configuration experiment；
5, the Bragg wavelength of optical fiber Bragg raster is obtained with fiber Bragg grating (FBG) demodulator；
6, according to formula (5), the center wavelength variation value Δ λ according to being pasted onto optical fiber Bragg raster on foil can
Obtain the acceleration a of measurand:
Theoretical Calculation shows, sensor resonant frequency is 1775Hz, and sensitivity coefficient is 4pm/g, and Calculation of Sensitivity value is neglected
Having omited Polymer implant to the externally applied forces effect of foil institute, actual value is significantly larger than calculated value.
Above in conjunction with accompanying drawing, detailed description of the invention of the present utility model is explained in detail, but this utility model is not
It is limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible to without departing from this practicality
On the premise of novel objective, various changes can be made.
Claims (3)
1. the high frequency FBG acceleration transducer of a stainless steel capillary and Polymer sensitization structure, it is characterised in that: include
Politef fix shell (1), stainless steel capillary (2), optical fiber Bragg raster (3), derive optical fiber (4), elastic metallic thin
Sheet (6)；
Both sides, described stainless steel capillary (2) outside are fixed on politef and are fixed in shell (1) hollow cylinder, optical fiber
It is pasted onto after Bragg grating (3) prestretched in resilient blade (6), is pasted with the elastic metallic of optical fiber Bragg raster (3)
Thin slice (6) puts into stainless steel capillary (2) central authorities, derives optical fiber (4) and draws from stainless steel capillary (2) both sides.
The high frequency FBG acceleration transducer of stainless steel capillary the most according to claim 1 and Polymer sensitization structure,
It is characterized in that: described resilient blade (6) both sides are respectively embedded in and are positioned at both sides in stainless steel capillary (2)
In Polymer implant I (5), Polymer implant II (7).
The high frequency FBG acceleration transducer of stainless steel capillary the most according to claim 2 and Polymer sensitization structure,
It is characterized in that: described Polymer implant I (5), Polymer implant II (7) are the both sides from stainless steel capillary (2)
Pour into Polymer liquid and solidify.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620570542.7U CN205826693U (en) | 2016-06-14 | 2016-06-14 | A kind of high frequency FBG acceleration transducer of stainless steel capillary and Polymer sensitization structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620570542.7U CN205826693U (en) | 2016-06-14 | 2016-06-14 | A kind of high frequency FBG acceleration transducer of stainless steel capillary and Polymer sensitization structure |
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| CN205826693U true CN205826693U (en) | 2016-12-21 |
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| CN201620570542.7U Expired - Fee Related CN205826693U (en) | 2016-06-14 | 2016-06-14 | A kind of high frequency FBG acceleration transducer of stainless steel capillary and Polymer sensitization structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974154A (en) * | 2016-06-14 | 2016-09-28 | 昆明理工大学 | High-frequency FBG acceleration sensor with stainless steel capillary and polymer sensitized structure and use method thereof |
| CN113064079A (en) * | 2021-03-05 | 2021-07-02 | 万向一二三股份公司 | Device and method for testing overcharge performance of lithium ion power battery pack |
-
2016
- 2016-06-14 CN CN201620570542.7U patent/CN205826693U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974154A (en) * | 2016-06-14 | 2016-09-28 | 昆明理工大学 | High-frequency FBG acceleration sensor with stainless steel capillary and polymer sensitized structure and use method thereof |
| CN113064079A (en) * | 2021-03-05 | 2021-07-02 | 万向一二三股份公司 | Device and method for testing overcharge performance of lithium ion power battery pack |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161221 Termination date: 20180614 |
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| CF01 | Termination of patent right due to non-payment of annual fee |