CN206193216U - Micro -nanofiber magnetic field sensor based on mach once, morally interfered - Google Patents
Micro -nanofiber magnetic field sensor based on mach once, morally interfered Download PDFInfo
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- CN206193216U CN206193216U CN201621281604.9U CN201621281604U CN206193216U CN 206193216 U CN206193216 U CN 206193216U CN 201621281604 U CN201621281604 U CN 201621281604U CN 206193216 U CN206193216 U CN 206193216U
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- magnetic field
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Abstract
The utility model provides a micro -nanofiber magnetic field sensor based on mach once, morally interfered relates to optic fibre magnetic field sensing technical field, concretely relates to micro -nanofiber magnetic field sensor based on mach once, morally interfered. The utility model relates to a solve in the sensing field of magnetic field problem that present magnetic field sensing technology sensitivity is low, the structure is complicated, manufacturing cost is high, the operation is complicated. The utility model discloses a ASE light source, magnetic field sensing head, optical signal processing ware. Wherein, including fiber coupler, magnetism sensitive material, no. Two fiber coupler in the sensing head of magnetic field. So the cost is low, the operation is thus simple,
Description
Technical field
The utility model is related to fibre optic magnetic field field of sensing technologies, and in particular to a kind of based on the micro- of Mach-Zehnder interference
Nano fiber magnetic field sensor.
Background technology
Magnetic field sensing is developed so far, and many magnetic field sensing methods has occurred.Existing magnetic field sensing method mainly has：Magnetic force
Method, electromagnetic induction method, galvanomagnetic-effect method, Pumping Magnetic Resonance Method, magneto-optic effect method etc..But these magnetic field sensing methods are due to certainty of measurement
The problems such as low, equipment making high cost, electromagnetic interference and much limited.It is difficult to large-scale promotion application.
With increasingly mature, the method for carrying out magnetic field sensing using optical fiber and optical fiber related device of optical fiber sensing technology
Also increasing research and development has been obtained., using light wave as carrier wave, magnetically susceptible material is used as magnetic for fibre optic magnetic field sensor
Field induction substance, is modulated by externally-applied magnetic field to optical signal.Fibre optic magnetic field sensor have sensitivity high, good insulating,
Corresponding speed is fast, relative inexpensiveness the advantages of.
Magnetic fluid has unique optical characteristics as a kind of magnetic sensitive material, and it is in optoelectronic information and sensory field
Using also more and more extensive.When magnetic field changes, its optical characteristics can change magnetic fluid, and with high sensitive
Degree.Therefore, it is necessary to Fibre Optical Sensor is combined with magnetic fluid, design that sensitivity is higher, structure is simpler, cost is lower
Fibre optic magnetic field sensor.
The content of the invention
Embodiment of the present utility model provide based on Mach-Zehnder interference micro-nano fiber magnetic field sensor, be for
Solve the problems, such as that low existing magnetic field sensor sensitivity, complex structure, high cost, operation difficulty are big.
It is that, up to above-mentioned purpose, the utility model embodiment is adopted the following technical scheme that：
There is provided it is a kind of based on Mach-Zehnder interference micro-nano fiber magnetic field sensor, the magnetic field sensor it include ASE
Light source（1）, magnetic field sensing head（2）, OSP（3）；
Magnetic field sensing head（2）, described magnetic field sensing head（2）Inside include a fiber coupler（2-1）, magnetic sensitive
Material（2-2）, No. two fiber couplers（2-3）, magnetic field sensing head（2）One end connects ASE light sources（1）The other end connects optical signal
Processor（3）.
Described ASE light sources（1）Output center wavelength be 1550nm, frequency bandwidth is 40nm.
Described magnetic field sensing head（2）Outside carries nylon shell.
Described magnetic field sensing head（2）In a fiber coupler（2-1）With No. two fiber couplers（2-3）Middle part
It is to corrode the micro-nano fiber for being formed by hydrofluoric acid, its corrosion depth is 80 μm, and magnetically susceptible material is coated with outside micro-nano fiber
（2-2）.
A described fiber coupler（2-1）With No. two fiber couplers（2-3）During by by single-mode fiber welding
Increasing strength of discharge and discharge time makes optical fiber deform upon and be formed, and it is two shapes of cascade bead.
Described magnetically susceptible material（2-2）It is magnetic fluid, its matrix is Fe3O4Nano particle, base fluid is kerosene, table
Face activating agent is oleic acid.
Described ASE light sources（1）, magnetic field sensing head（2）, OSP（3）Connected by single-mode fiber each other
Connect, and connected by way of fiber fuse is connected between single-mode fiber and each device.
Described OSP（3）It is spectrometer.
The utility model patent provides a kind of micro-nano fiber magnetic field sensor based on Mach-Zehnder interference, the optical fiber
Magnetic field sensor improves the problem that low existing magnetic field sensor sensitivity, complex structure, production cost are high, technical difficulty is big.
The beneficial effects of the utility model are：The utility model is for current magnetic field transducer sensitivity is low, complex structure,
The problem that production cost is high, technical difficulty is big, proposes improvement project.It is strong by the discharge time and electric discharge that control optical fiber splicer
Two general single mode fibers are carried out welding by degree, and two optical fiber balls of cascade are formed at two fused fiber splices, are similar to peanut knot
Structure, is used to excite the communication mode of light in fibre core, and the light propagated in fiber core can be made to enter covering.Not far away from the optical fiber ball
Place equally carries out fused fiber splice in this way.This two groups of optical fiber balls can play a part of fiber coupler.This structure system
Make low cost, integrated level is high, while there is sensitivity higher compared to conventional Mach-Zehnder interference structure.In two groups of optical fiber balls
Between corrosion partly carried out to fibre cladding using hydrofluoric acid form micro-nano fiber, and magnetic fluid is coated at corrosion.Magnetic field changes
Change can make the refractive index of magnetic fluid change, and light path when by magnetic fluid of the light in such covering can also change.This
Sample is interfered when the light that fibre core and covering are transmitted meets at second optical fiber ball.By the interference spectrum to changing
Measurement can indirectly obtain the situation of changes of magnetic field.The magnetic fluid for being used its matrix is Fe3O4Nano particle, base fluid is kerosene, table
Face activating agent is oleic acid.And magnetic fluid is coated at micro-nano fiber by physical method, form the micro-nano light of magnetic fluid filling
Fine sensing head.The sensing head is combined with ASE light sources and OSP, a kind of sensitivity high, simple structure, production is formed
The relatively low direct-pass type optical fiber magnetic field sensor of relative inexpensiveness, operation difficulty.When sensing head is placed in magnetic field, magnetic fluid
Effective refractive index changes, and by light herein, its light path changes, with fibre core in optical coupling when interfere.Magnetic current
The coupler structure of the body sensitivity high to magnetic field and two cascaded optical fiber balls ensure that sensing accuracy.Meanwhile, through type knot
Structure is relatively easy, and cost is lower.
Brief description of the drawings
Fig. 1 is the micro-nano fiber magnetic field sensor structure based on Mach-Zehnder interference；
Fig. 2 is the partial enlargement structure of sensing head.
Specific embodiment
Specific embodiment of the present utility model is further illustrated with reference to Figure of description.
Such as Fig. 1, the micro-nano fiber magnetic field sensor based on Mach-Zehnder interference described in present embodiment, it includes ASE
Light source（1）, magnetic field sensing head（2）, OSP（3）；
Magnetic field sensing head（2）, described magnetic field sensing head（2）Inside include a fiber coupler（2-1）, magnetic sensitive
Material（2-2）, No. two fiber couplers（2-3）, magnetic field sensing head（2）One end connects ASE light sources（1）The other end connects optical signal
Processor（3）.
Described ASE light sources（1）Output center wavelength be 1550nm, frequency bandwidth is 40nm.
Described magnetic field sensing head（2）Outside carries nylon shell.
Described magnetic field sensing head（2）In a fiber coupler（2-1）With No. two fiber couplers（2-3）Middle part
It is to corrode the micro-nano fiber for being formed by hydrofluoric acid, its corrosion depth is 80 μm, and magnetically susceptible material is coated with outside micro-nano fiber
（2-2）.
A described fiber coupler（2-1）With No. two fiber couplers（2-3）During by by single-mode fiber welding
Increasing strength of discharge and discharge time makes optical fiber deform upon and be formed, and it is two shapes of cascade bead.
Described magnetically susceptible material（2-2）It is magnetic fluid, its matrix is Fe3O4Nano particle, base fluid is kerosene, table
Face activating agent is oleic acid.
Described ASE light sources（1）, magnetic field sensing head（2）, OSP（3）Connected by single-mode fiber each other
Connect, and connected by way of fiber fuse is connected between single-mode fiber and each device.
Described OSP（3）It is spectrometer.
Using the method for melting connection at the link of described all devices.
When in use, light path is first built into completion according to brief description of the drawings, sensing head is placed perpendicular to magnetic direction.Treat light
Can be measured after the stable output signal of source.
Operation principle：
Micro-nano fiber magnetic field sensor structure based on Mach-Zehnder interference：
The course of work：First light path is connected by index path, light source is opened, sensing head is vertically arranged in magnetic field, treat light
Start measurement after the output light signal stabilization of source.Light enters magnetic field sensing head after being sent by light source, in a work for fiber coupler
Under, a part of light enters covering, and another part light stays in fibre core, because magnetic field is to magnetic current when the light in covering is by magnetic fluid
The refraction index changing of the effect of body its magnetic fluid, cause this regardless of light its light path change.Light in fibre core and covering is at No. two
Met at fiber coupler and interfered.Magnetic field intensity is measured indirectly by the change for measuring interference spectrum.
Claims (8)
1. the micro-nano fiber magnetic field sensor interfered based on Mach-Zehnder, it is characterised in that：It includes ASE light sources（1）, magnetic field
Sensing head（2）, OSP（3）；
Magnetic field sensing head（2）, described magnetic field sensing head（2）Inside include a fiber coupler（2-1）, magnetically susceptible material
（2-2）, No. two fiber couplers（2-3）, magnetic field sensing head（2）One end connects ASE light sources（1）The other end connects optical signal prosessing
Device（3）.
2. it is according to claim 1 based on Mach-Zehnder interference micro-nano fiber magnetic field sensor, it is characterised in that：Institute
The ASE light sources stated（1）Output center wavelength be 1550nm, frequency bandwidth is 40nm.
3. it is according to claim 1 based on Mach-Zehnder interference micro-nano fiber magnetic field sensor, it is characterised in that：Institute
The magnetic field sensing head stated（2）Outside carries nylon shell.
4. it is according to claim 1 based on Mach-Zehnder interference micro-nano fiber magnetic field sensor, it is characterised in that：Institute
The magnetic field sensing head stated（2）In a fiber coupler（2-1）With No. two fiber couplers（2-3）Middle part is by hydrofluoric acid
Corrode the micro-nano fiber for being formed, its corrosion depth is 80 μm, and magnetically susceptible material is coated with outside micro-nano fiber（2-2）.
5. it is according to claim 1 based on Mach-Zehnder interference micro-nano fiber magnetic field sensor, it is characterised in that：Institute
The fiber coupler stated（2-1）With No. two fiber couplers（2-3）Increase electric discharge during by by single-mode fiber welding strong
Degree and discharge time make optical fiber deform upon and be formed, and it is two shapes of cascade bead.
6. it is according to claim 1 based on Mach-Zehnder interference micro-nano fiber magnetic field sensor, it is characterised in that：Institute
The magnetically susceptible material stated（2-2）It is magnetic fluid, its matrix is Fe3O4Nano particle, base fluid is kerosene, and surfactant is
Oleic acid.
7. it is according to claim 1 based on Mach-Zehnder interference micro-nano fiber magnetic field sensor, it is characterised in that：Institute
The ASE light sources stated（1）, magnetic field sensing head（2）, OSP（3）Connected by single-mode fiber each other, and single-mode optics
Connected by way of fiber fuse is connected between fine and each device.
8. it is according to claim 1 based on Mach-Zehnder interference micro-nano fiber magnetic field sensor, it is characterised in that：Institute
The OSP stated（3）It is spectrometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621281604.9U CN206193216U (en) | 2016-11-28 | 2016-11-28 | Micro -nanofiber magnetic field sensor based on mach once, morally interfered |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621281604.9U CN206193216U (en) | 2016-11-28 | 2016-11-28 | Micro -nanofiber magnetic field sensor based on mach once, morally interfered |
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| Publication Number | Publication Date |
|---|---|
| CN206193216U true CN206193216U (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621281604.9U Expired - Fee Related CN206193216U (en) | 2016-11-28 | 2016-11-28 | Micro -nanofiber magnetic field sensor based on mach once, morally interfered |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109814048A (en) * | 2019-02-01 | 2019-05-28 | 北京交通大学 | For measuring the optical-electronic oscillator and its measurement method in magnetic field |
| CN110579726A (en) * | 2019-10-15 | 2019-12-17 | 哈尔滨理工大学 | Spr-based high-sensitivity magnetic field sensing device |
| CN111896035A (en) * | 2020-07-09 | 2020-11-06 | 哈尔滨理工大学 | Mach-Zehnder interference type optical fiber partial discharge detection method based on micro-nano optical fiber coupling |
| CN112526202A (en) * | 2020-11-19 | 2021-03-19 | 哈尔滨理工大学 | Optical fiber sensing device based on ultrasonic detection voltage and implementation method |
| CN112630530A (en) * | 2020-11-19 | 2021-04-09 | 哈尔滨理工大学 | Optical fiber sensing device based on ultrasonic detection frequency and implementation method |
| CN114167323A (en) * | 2021-11-30 | 2022-03-11 | 哈尔滨理工大学 | Temperature and magnetic field sensing device with magnetic fluid filled with MNF (magnetic network function) and FBG (fiber Bragg Grating) cascaded |
-
2016
- 2016-11-28 CN CN201621281604.9U patent/CN206193216U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109814048A (en) * | 2019-02-01 | 2019-05-28 | 北京交通大学 | For measuring the optical-electronic oscillator and its measurement method in magnetic field |
| CN110579726A (en) * | 2019-10-15 | 2019-12-17 | 哈尔滨理工大学 | Spr-based high-sensitivity magnetic field sensing device |
| CN111896035A (en) * | 2020-07-09 | 2020-11-06 | 哈尔滨理工大学 | Mach-Zehnder interference type optical fiber partial discharge detection method based on micro-nano optical fiber coupling |
| CN112526202A (en) * | 2020-11-19 | 2021-03-19 | 哈尔滨理工大学 | Optical fiber sensing device based on ultrasonic detection voltage and implementation method |
| CN112630530A (en) * | 2020-11-19 | 2021-04-09 | 哈尔滨理工大学 | Optical fiber sensing device based on ultrasonic detection frequency and implementation method |
| CN112630530B (en) * | 2020-11-19 | 2021-09-07 | 哈尔滨理工大学 | Optical fiber sensing device based on ultrasonic detection frequency and implementation method |
| CN112526202B (en) * | 2020-11-19 | 2021-09-07 | 哈尔滨理工大学 | Optical fiber sensing device based on ultrasonic detection voltage and implementation method |
| CN114167323A (en) * | 2021-11-30 | 2022-03-11 | 哈尔滨理工大学 | Temperature and magnetic field sensing device with magnetic fluid filled with MNF (magnetic network function) and FBG (fiber Bragg Grating) cascaded |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170524 Termination date: 20171128 |