CN106500740B - A kind of double parameter fibre optical sensors and preparation method thereof based on magnetic field and temperature - Google Patents
A kind of double parameter fibre optical sensors and preparation method thereof based on magnetic field and temperature Download PDFInfo
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- CN106500740B CN106500740B CN201610917549.6A CN201610917549A CN106500740B CN 106500740 B CN106500740 B CN 106500740B CN 201610917549 A CN201610917549 A CN 201610917549A CN 106500740 B CN106500740 B CN 106500740B
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- 239000000835 fiber Substances 0.000 title claims abstract description 83
- 230000003287 optical effect Effects 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims description 7
- 239000013307 optical fiber Substances 0.000 claims abstract description 82
- 238000003466 welding Methods 0.000 claims abstract description 28
- 239000004033 plastic Substances 0.000 claims abstract description 21
- 229920003023 plastic Polymers 0.000 claims abstract description 21
- 239000010902 straw Substances 0.000 claims abstract description 19
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 8
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 8
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011553 magnetic fluid Substances 0.000 claims abstract description 6
- 238000005253 cladding Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 230000002146 bilateral effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 238000000411 transmission spectrum Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
Abstract
A kind of double parameter fibre optical sensors based on magnetic field and temperature, it is characterized by: being composed in series by incidence end single-mode fiber, spherical structure, single mode optical fiber, less fundamental mode optical fibre and exit end single-mode fiber, and be packaged in plastic straw with rosin, magnetic fluid is filled in plastic straw；Spherical structure is as coupler, and the single mode optical fiber of interlude is as sensing unit, and less fundamental mode optical fibre is not only used as sensing unit, but also as coupler.The invention has the advantages that the optical fibre sensor structure simply and readily makes, only need to the optical fiber to different core diameters carry out simple welding according to a certain percentage；By cascading spherical structure and less fundamental mode optical fibre, the higher order mode of fibre core can be not only excited, but also the higher order mode of covering can be excited, available different types of interference paddy measures while can realizing double parameters with it according to its different sensibility to temperature and magnetic field.
Description
Technical field
The invention belongs to sensory field of optic fibre, especially a kind of double parameter fibre optical sensors based on magnetic field and temperature and its
Preparation method.
Background technique
As the price of optical fibre device is more and more cheaper, type is more and more various, and Fibre Optical Communication Technology is also more and more mature,
One of which is different from traditional completely new sensor technology, i.e. optical fiber sensing technology, since its is light-weight, small in size, power consumption
The advantages that low, isolation electromagnetic interference and remote control operation facilitate, and it is widely used in the measurement of various physical quantitys, such as temperature is answered
Change, pressure, displacement, refractive index etc..It is contemplated that fibre optical sensor can become the alternative product of electrical sensor, permitted
Multi-field application prospect is very extensive.
As the carrier of much information perhaps, magnetic field is present in many places of human society life, nature, therefore, inspection
The surveying and sampling the various information carried in various magnetic fields and its magnetic field of the task, just falls in magnetic field sensor.In recent years,
With the fast development of informationization, industrialization, communications and transportation, Medical Instruments, electronic technology, household electrical appliance etc., so that magnetic field
Sensor is more developed and is applied.
The working principle of less fundamental mode optical fibre is based on intermode interference principle, its transmission spectrum can be by changing length, applying
Add axial compressive force, change the methods of environment temperature to control, therefore, different light can be designed according to specific application demand
Fiber device.
Summary of the invention
The purpose of the present invention is analyzing in view of the above technology, a kind of double parameter Fibre Optical Sensors based on magnetic field and temperature are proposed
Device and preparation method thereof, the fibre optical sensor are based on spherical structure and less fundamental mode optical fibre, according to interference paddy to magnetic field and temperature not
Same sensibility measures while realizing double parameters；The sensor structure simply and readily makes, is at low cost, being conducive to promote and answer
With.
Technical solution of the present invention:
A kind of double parameter fibre optical sensors based on magnetic field and temperature, by incidence end single-mode fiber, spherical structure, single-mode optics
Fine, less fundamental mode optical fibre and exit end single-mode fiber are composed in series, and are packaged in plastic straw with rosin, and magnetic is filled in plastic straw
Fluid；Incidence end single-mode fiber is connect with spherical structure, and spherical structure is connect with single mode optical fiber, light from incidence end single-mode fiber into
Enter to chondritic, onwards transmission and inspires cladding mode in the fibre core and covering of intermediate section single-mould fiber；Single mode optical fiber
With less fundamental mode optical fibre welding, less fundamental mode optical fibre and exit end single-mode fiber welding, light is in exit end single-mode fiber and less fundamental mode optical fibre welding
Locate the excitation and interference of emergence pattern；The spherical structure is as coupler, and diameter is 160-180 μm, the single-mode optics of interlude
Fibre is used as sensing unit, length 2cm；Less fundamental mode optical fibre is not only used as sensing unit, but also as coupler, length 3cm, and core diameter is
9 μm, cladding diameter is 125 μm；Plastic straw diameter is 2mm, length 6cm；Single mode optical fiber used is standard single-mode fiber,
Core diameter is 8.2 μm, and cladding diameter is 125 μm.
A kind of preparation method of double parameter fibre optical sensors based on magnetic field and temperature, steps are as follows:
1) a single-mode fiber is put into the optical fiber splicer of model Fitel S178C, using manual manipulation mode,
Electric discharge starts intensity 150bit for the first time, and electric discharge terminates intensity 150bit for the first time, and discharge time 12100ms, Promoting Form is double
Side motor is mobile, advance distance 18000um, and spherical structure is made after electric discharge；
2) above-mentioned spherical structure and a single-mode fiber are put into optical fiber splicer both sides, using manual manipulation mode, put
Electricity 100bit, time 3000ms, push-in stroke are 25 μm, and spherical structure and single mode optical fiber are completed to connect after electric discharge, in single mode
Fiber lengths be 2cm at, it is with cutter that ends cutting is neat；
3) by above-mentioned single mode optical fiber and one section of less fundamental mode optical fibre welding, welding procedure SMF-MMF is put using automatic welding
Electric strength is 100bit, time 3000ms, with cutter that ends cutting is neat at length 3cm.
4) by above-mentioned less fundamental mode optical fibre and a single-mode fiber welding, welding procedure selects SMF-MMF, using automatic welding,
Strength of discharge is 100bit, time 3000ms, and less fundamental mode optical fibre and single mode optical fiber are completed to connect after electric discharge, and sensing arrangement is made；
5) above-mentioned sensing arrangement is placed in diameter is 2mm, length is in the plastic straw of 6cm, then to plastic straw
In fill magnetic fluid, then plastic straw both ends are sealed with rosin, double parameter fibre optical sensors based on magnetic field and temperature are made.
Working mechanism of the invention:
Light enters spherical structure from incidence end single-mode fiber, the Xiang Qianchuan in the fibre core and covering of intermediate section single-mould fiber
It is defeated, and cladding mode is inspired, in single mode optical fiber and less fundamental mode optical fibre weld, meet the cladding mode and fibre of phase-matching condition
It will be interfered between core model formula；In addition, the high-order core mode of less fundamental mode optical fibre can be also excited, in less fundamental mode optical fibre and single mode optical fiber
Second weld, meeting will interfere between the core mode of phase-matching condition.So the sensor can include two kinds
Different types of interference, i.e. fibre core-core mode interference and fibre core-cladding mode interference, according to its to temperature and magnetic field not
Same sensibility measures while can realizing double parameters with it.
The advantages of the present invention are:
The optical fibre sensor structure simply and readily makes, it is only necessary to carry out according to a certain percentage to the optical fiber of different core diameters
Simple welding can not only excite the higher order mode of fibre core, but also can excite covering by cascading spherical structure and less fundamental mode optical fibre
Higher order mode, available different types of interference paddy can realize according to its different sensibility to temperature and magnetic field with it
It is measured while double parameters；The sensor structure is compact, easy to that production, cost is relatively low, thus is more suitable for actual application.
Detailed description of the invention
Fig. 1 is the optical fibre sensor structure schematic diagram.
Fig. 2 is the fibre optical sensor detection method schematic diagram.
Fig. 3 is the transmission spectrum of the fibre optical sensor.
In figure: 1. incidence end single-mode fibers, 2. spherical structures, 3. single mode optical fibers, 4. less fundamental mode optical fibres, 5. rosin, 6. plastics
Tubule, 7. magnetic fluids, 8. exit end single-mode fibers, 9. wideband light sources, 10. magnetic fields, 11. Tesla meters, 12. spectroanalysis instruments.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment:
A kind of double parameter fibre optical sensors based on magnetic field and temperature, as shown in Figure 1, by incidence end single-mode fiber 1, spherical shape
Structure 2, single mode optical fiber 3, less fundamental mode optical fibre 4 and exit end single-mode fiber 8 are composed in series, and are packaged in plastic straw 6 with rosin 5
In, plastic straw 6 fills magnetic fluid 7；Incidence end single-mode fiber 1 is connect with spherical structure 2, and spherical structure 2 and single mode optical fiber 3 connect
It connects, light enters chondritic 2 from incidence end single-mode fiber 1, the onwards transmission in the fibre core and covering of intermediate section single-mould fiber 3
And inspire cladding mode；Single mode optical fiber 3 and 4 welding of less fundamental mode optical fibre, less fundamental mode optical fibre 4 and 8 welding of exit end single-mode fiber, light exist
The excitation and interference of 4 weld emergence pattern of exit end single-mode fiber 8 and less fundamental mode optical fibre；The spherical structure 2 is used as coupler,
Diameter is 160-180 μm, and the single mode optical fiber 3 of interlude is used as sensing unit, length 2cm；Less fundamental mode optical fibre 4 is both used as sensing unit,
It is used as coupler, length 3cm again, core diameter is 9 μm, and cladding diameter is 125 μm；6 diameter of plastic straw is 2mm, length
For 6cm；Single mode optical fiber used is standard single-mode fiber, and core diameter is 8.2 μm, and cladding diameter is 125 μm.
Light enters chondritic 2 from incidence end single-mode fiber 1, the onwards transmission in intermediate section single-mould fiber 3, and excites
Cladding mode out meets between the cladding mode of phase matched and core mode in single mode optical fiber 3 and 4 weld of less fundamental mode optical fibre
It will interfere.In addition to this, the high-order core mode in less fundamental mode optical fibre 4 can be also excited, in less fundamental mode optical fibre 4 and single mode optical fiber 8
Weld, meeting will interfere between the core mode of phase-matching condition.So the sensor can include two kinds of inhomogeneities
The interference of type, i.e. fibre core-core mode interference and fibre core-cladding mode interference.
A kind of preparation method of double parameter fibre optical sensors based on magnetic field and temperature, steps are as follows:
1) a single-mode fiber is put into the optical fiber splicer of model Fitel S178C, using manual manipulation mode,
Electric discharge starts intensity 150bit for the first time, and electric discharge terminates intensity 150bit, discharge time 12100ms, Z advance distance for the first time
Spherical structure is made in 18000um, Z Promoting Form 2 after electric discharge；
2) above-mentioned spherical structure and a single-mode fiber are put into optical fiber splicer both sides, using manual manipulation mode, put
Electricity 100bit, time 3000ms, push-in stroke are 25 μm, and spherical structure and single mode optical fiber are completed to connect after electric discharge, in single mode
Fiber lengths be 2cm at, it is with cutter that ends cutting is neat；
3) by above-mentioned single mode optical fiber and one section of less fundamental mode optical fibre welding, welding procedure selects SMF-MMF, and (program is suitable for not
With the welding between core optical fibers), using automatic welding, strength of discharge 100bit, time 3000ms, length at 3cm,
It is with cutter that ends cutting is neat.
4) by above-mentioned less fundamental mode optical fibre and a single-mode fiber welding, welding procedure selects SMF-MMF, using automatic welding,
Strength of discharge is 100bit, time 3000ms, and less fundamental mode optical fibre and single mode optical fiber are completed to connect after electric discharge, and sensing arrangement is made；
5) above-mentioned sensing arrangement is placed in diameter is 2mm, and length is in the plastic straw of 6cm, then toward plastic straw
In fill magnetic fluid, then plastic straw both ends are sealed with rosin, double parameter fibre optical sensors based on magnetic field and temperature are made.
Specific detection method, as shown in Figure 2:
Input terminal single mode optical fiber 1 is connect with wideband light source 9, output end single mode optical fiber 8 is connect with spectroanalysis instrument 12, will
The sensing arrangement made is fixed on experimental bench, then applies magnetic field 10 to the sensor, is measured and is sensed with Tesla meter 11
The size of device surrounding magnetic field, magnetic-field measurement range are 0mT-20mT, and magnetic field records a data every 2mT, according to institute's measured data,
You can get it, and external magnetic field changes the relationship with spectral shift amount.The sensor is fixed on temperature-constant plate again, temperature is carried out
Measurement, setting temperature-constant plate range of temperature is 25-50 DEG C, every data of 5 DEG C of records.
Fig. 3 is the transmission spectrum of the fibre optical sensor, spectrogram is observed, when external environment changes, according to interference
The long drift value of spike, in conjunction with sensitive matrix equationThe change in temperature and magnetic field can be obtained
Change amount, wherein Δ λ1With Δ λ2Respectively fibre core-fibre core interference peaks and fibre core-covering interference peaks characteristic wavelength, Δ T and Δ M
The respectively variable quantity of temperature and refractive index, KT1、KM1And KT2、KM2It is fibre core-fibre core interference peaks and fibre core-covering interference respectively
The temperature and refractive index sensitivity of peak characteristic wavelength.
Claims (2)
1. a kind of double parameter fibre optical sensors based on magnetic field and temperature, it is characterised in that: by incidence end single-mode fiber, spherical junctions
Structure, single mode optical fiber, less fundamental mode optical fibre and exit end single-mode fiber are composed in series, and are packaged in plastic straw with rosin, and plastics are thin
Magnetic fluid is filled in pipe；Incidence end single-mode fiber is connect with spherical structure, and spherical structure is connect with single mode optical fiber, and light is from incidence end
Single mode optical fiber enters spherical structure, onwards transmission and inspires cladding mode in the fibre core and covering of intermediate section single-mould fiber
Formula；Single mode optical fiber and less fundamental mode optical fibre welding, less fundamental mode optical fibre and exit end single-mode fiber welding, light is in exit end single-mode fiber and less
The excitation and interference of mode fiber weld emergence pattern；For the spherical structure as coupler, diameter is 160-180 μm, intermediate
The single mode optical fiber of section is as sensing unit, length 2cm；Less fundamental mode optical fibre is not only used as sensing unit, but also as coupler, length 3cm,
Core diameter is 9 μm, and cladding diameter is 125 μm；Plastic straw diameter is 2mm, length 6cm；Single mode optical fiber used is mark
Quasi-monomode fiber, core diameter are 8.2 μm, and cladding diameter is 125 μm.
2. a kind of preparation method of double parameter fibre optical sensors as described in claim 1 based on magnetic field and temperature, feature exist
In steps are as follows:
1) a single-mode fiber is put into the optical fiber splicer of model Fitel S178C, using manual manipulation mode, for the first time
Electric discharge starts intensity 150bit, and electric discharge for the first time terminates intensity 150bit, discharge time 12100ms, and Promoting Form is bilateral horse
Up to movement, spherical structure is made in advance distance 18000um after electric discharge；
2) above-mentioned spherical structure and a single-mode fiber are put into optical fiber splicer both sides, use manual manipulation mode, discharge capacity
100bit, time 3000ms, push-in stroke are 25 μm, and spherical structure and single mode optical fiber are completed to connect after electric discharge, in single mode optical fiber
Length be 2cm at, it is with cutter that ends cutting is neat；
3) by above-mentioned single mode optical fiber and one section of less fundamental mode optical fibre welding, welding procedure SMF-MMF, using automatic welding, electric discharge is strong
Degree be 100bit, time 3000ms, it is with cutter that ends cutting is neat at length 3cm；
4) by above-mentioned less fundamental mode optical fibre and a single-mode fiber welding, welding procedure selects SMF-MMF, uses automatic welding, electric discharge
Intensity is 100bit, time 3000ms, and less fundamental mode optical fibre and single mode optical fiber are completed to connect after electric discharge, and sensing arrangement is made；
5) above-mentioned sensing arrangement is placed in diameter is 2mm, length is in the plastic straw of 6cm, then to filling out in plastic straw
Magnetize fluid, then plastic straw both ends are sealed with rosin, and double parameter fibre optical sensors based on magnetic field and temperature are made.
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Families Citing this family (6)
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| CN107063499A (en) * | 2017-04-19 | 2017-08-18 | 天津理工大学 | A kind of double parameter fibre optical sensors and preparation method based on less fundamental mode optical fibre wimble structure |
| CN107449471A (en) * | 2017-09-29 | 2017-12-08 | 中国计量大学 | A kind of magnetic field and temperature simultaneously measuring device based on highly doped germanium fibre-optical probe |
| CN108168583B (en) * | 2017-12-22 | 2020-04-03 | 北京信息科技大学 | Double-parameter optical fiber sensor prepared based on chemical corrosion combined with discharge welding |
| CN109031168A (en) * | 2018-06-01 | 2018-12-18 | 燕山大学 | A kind of taper less fundamental mode optical fibre magnetic field sensor based on magnetic fluid |
| CN110471008B (en) * | 2019-08-08 | 2021-12-07 | 天津大学 | Vector optical fiber magnetic field sensor based on eccentric hollow microsphere cavity and manufacturing method thereof |
| CN113324570B (en) * | 2021-06-03 | 2023-01-03 | 南京信息工程大学 | Sensing device based on balloon-shaped optical fiber MZI and manufacturing method of balloon-shaped optical fiber MZI sensor |
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