CN103809134A - Optical fiber magnetic field detection device - Google Patents
Optical fiber magnetic field detection device Download PDFInfo
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- CN103809134A CN103809134A CN201210457600.1A CN201210457600A CN103809134A CN 103809134 A CN103809134 A CN 103809134A CN 201210457600 A CN201210457600 A CN 201210457600A CN 103809134 A CN103809134 A CN 103809134A
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- optical fiber
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- magnetic field
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Abstract
The invention discloses an optical fiber magnetic field detection device. The optical fiber magnetic field detection device comprises a housing, a first optical fiber, a second optical fiber, a first adhesive, a second adhesive, a light source, an optical detector and a control processing unit; the light source, the optical detector and the control processing unit are arranged outside the housing; one end of the first optical fiber penetrates the inside of the housing to be connected with the housing through the first adhesive; the other end of the first optical fiber is located outside the housing and connected with the light source; one end of the second optical fiber penetrates the inside of the housing and the end portion is provided with a functional layer; ends of the positions of the first optical fiber and the second optical fiber, which are located in the housing, are arranged in an alignment mode; the other end of the second optical fiber is located outside the housing and connected with the optical detector; the optical detector is connected with the control processing unit; detected signals are transmitted to the control processing unit and analysis processing is performed on the detected signals through the control processing unit; the control processing unit is also connected with the light source. The optical fiber magnetic field detection device has the advantages of being simple in structure, low in cost and good in stability.
Description
Technical field
A kind of fibre-optical sensing device of the present invention, especially relates to a kind of optical fiber detector for magnetic field.
Background technology
Magnetic-field measurement is widely used in and the fields such as Aero-Space, geology detecting, biomedicine and traffic, transportation, electric power.Traditional magnetic field sensing device is take Hall effect and electromagnetic induction principle as basis, but the shortcoming of these sensing devices is to be subject to electromagnetic interference (EMI), to occur the phenomenons such as easy magnetic saturation, existing optics exist based on Faraday rotation effect sensing device or the sensing device based on fiber grating the shortcoming that poor stability, precision are not high, the life-span is short, cost is high.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, a kind of optical fiber detector for magnetic field is provided, it is simple in structure, reasonable in design and result of use is good, can effectively solve in prior art take Hall effect and electromagnetic induction principle and be subject to electromagnetic interference (EMI) as basic magnetic field sensing device exists, occur the problem of easy magnetic saturation phenomenon, simultaneously compared with optics based on Faraday rotation effect sensing device or sensing device good stability, precision based on fiber grating are high, cost is low.
For achieving the above object, the technical solution used in the present invention is: a kind of optical fiber detector for magnetic field, it is characterized in that: comprise housing, the first optical fiber, the second optical fiber, the first adhesive, the second adhesive, light source, photo-detector and controlled processing unit, described light source, photo-detector and controlled processing unit are all arranged on the outside of housing, one end of described the first optical fiber penetrates the inside of housing and is connected with housing by the first adhesive, the other end of described the first optical fiber is positioned at the outside of housing and is connected with light source, inside and end that one end of described the second optical fiber penetrates housing are provided with functional layer, described functional layer is magnetic material layer or metal material layer, be positioned at the second optical fiber of described housing and the termination of the first optical fiber and aim at setting, the other end of described the second optical fiber is positioned at the outside of housing, the other end of described the second optical fiber is with for detection of light signal, whether the coupling between the first optical fiber and the second optical fiber occurs that the photo-detector changing is connected, described photo-detector is connected with controlled processing unit and the signal of detection is passed to controlled processing unit and carries out analyzing and processing by controlled processing unit, described controlled processing unit is also connected with light source and powers by light source.
Above-mentioned a kind of optical fiber detector for magnetic field, is characterized in that: described controlled processing unit is single-chip microcomputer.
Above-mentioned a kind of optical fiber detector for magnetic field, is characterized in that: described housing is ceramic shell or macromolecular material housing.
Above-mentioned a kind of optical fiber detector for magnetic field, is characterized in that: described housing is aluminum enclosure, titanium housing or copper shell.
The present invention compared with prior art has the following advantages:
1, it is simple in structure, reasonable in design and result of use is good in the present invention.
2, the present invention is when this optical fiber detector for magnetic field is in the time detecting magnetic field, because the effect in magnetic field makes the termination of the second optical fiber that is coated with magnetic material layer or metal material layer stressed and bending, make the termination of interior the first optical fiber of housing and the second optical fiber align occur skew, thereby make the coupling of light signal between the first optical fiber and the second optical fiber occur changing, photo-detector obtains this variation and passes to controlled processing unit, the latter draws the parameter in magnetic field to this mutation analysis processing, its precision is high, be not subject to electromagnetic interference (EMI), cost is low, only provide stabilized light source and photo-detector just can monitor.
3, the present invention can effectively solve in prior art take Hall effect and electromagnetic induction principle and be subject to electromagnetic interference (EMI) as basic magnetic field sensing device exists, occurs the problem of easy magnetic saturation phenomenon, simultaneously compared with optics based on Faraday rotation effect sensing device or sensing device good stability, precision based on fiber grating are high, cost is low.
In sum, optical fiber detector for magnetic field of the present invention is simple in structure, cost is low, good stability, has advantages of more.
Below by drawings and Examples, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Description of reference numerals:
1-housing; The 2-the first optical fiber; The 3-the second optical fiber;
The 3-the second optical fiber; 5-1-the first adhesive; 5-2-the second adhesive;
6-light source; 7-photo-detector; 8-controlled processing unit.
Embodiment
As shown in Figure 1, the present invention includes housing 1, the first optical fiber 2, the second optical fiber 3, the first adhesive 5-1, the second adhesive 5-2, light source 6, photo-detector 7 and controlled processing unit 8, described light source 6, photo-detector 7 and controlled processing unit 8 are all arranged on the outside of housing 1, one end of described the first optical fiber 2 penetrates the inside of housing 1 and is connected with housing 1 by the first adhesive 5-1, the other end of described the first optical fiber 2 is positioned at the outside of housing 1 and is connected with light source 6, inside and end that one end of described the second optical fiber 3 penetrates housing 1 are provided with functional layer 4, described functional layer 4 is magnetic material layer or metal material layer, be positioned at the second optical fiber 3 of described housing 1 and the termination of the first optical fiber 2 and aim at setting, the other end of described the second optical fiber 3 is positioned at the outside of housing 1, the other end of described the second optical fiber 3 is with for detection of light signal, whether the coupling between the first optical fiber 2 and the second optical fiber 3 occurs that the photo-detector 7 changing is connected, described photo-detector 7 is connected with controlled processing unit 8 and the signal of detection is passed to controlled processing unit 8 and carries out analyzing and processing by controlled processing unit 8, described controlled processing unit 8 is also connected with light source 6 and powers by light source 6.
In the present embodiment, preferred, described controlled processing unit 8 is single-chip microcomputer.
In the present embodiment, preferred, described housing 1 is ceramic shell or macromolecular material housing.
In the present embodiment, preferred, described housing 1 is aluminum enclosure, titanium housing or copper shell.
In the present embodiment, in housing 1, be filled with protective gas, as nitrogen, argon gas, neon or helium.
Principle of work of the present invention is: when this optical fiber detector for magnetic field is in the time detecting magnetic field, because the effect in magnetic field makes the termination of the second optical fiber 3 that is coated with magnetic material layer or metal material layer stressed and bending, there is skew in the termination that interior the first optical fiber 2 of housing 1 and the second optical fiber 3 are aimed at, thereby make the coupling of light signal between the first optical fiber 2 and the second optical fiber 3 occur changing, photo-detector 7 obtains this variation and passes to controlled processing unit 8, the latter draws the parameter in magnetic field to this mutation analysis processing, its precision is high, be not subject to electromagnetic interference (EMI), cost is low, only provide stabilized light source and photo-detector just can monitor.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification, change and equivalent structure transformation of above embodiment being done according to the technology of the present invention essence, all still belongs in the protection domain of technical solution of the present invention.
Claims (4)
1. an optical fiber detector for magnetic field, it is characterized in that: comprise housing (1), the first optical fiber (2), the second optical fiber (3), the first adhesive (5-1), the second adhesive (5-2), light source (6), photo-detector (7) and controlled processing unit (8), described light source (6), photo-detector (7) and controlled processing unit (8) are all arranged on the outside of housing (1), one end of described the first optical fiber (2) penetrates the inside of housing (1) and is connected with housing (1) by the first adhesive (5-1), the other end of described the first optical fiber (2) is positioned at the outside of housing (1) and is connected with light source (6), inside and end that one end of described the second optical fiber (3) penetrates housing (1) are provided with functional layer (4), described functional layer (4) is magnetic material layer or metal material layer, be positioned at second optical fiber (3) of described housing (1) and the termination of the first optical fiber (2) and aim at setting, the other end of described the second optical fiber (3) is positioned at the outside of housing (1), the other end of described the second optical fiber (3) is with for detection of light signal, whether the coupling between the first optical fiber (2) and the second optical fiber (3) occurs that the photo-detector (7) changing is connected, described photo-detector (7) is connected with controlled processing unit (8) and the signal of detection is passed to controlled processing unit (8) and carries out analyzing and processing by controlled processing unit (8), described controlled processing unit (8) is also connected with light source (6) and powers by light source (6).
2. a kind of optical fiber detector for magnetic field according to claim 1, is characterized in that: described controlled processing unit (8) is single-chip microcomputer.
3. a kind of optical fiber detector for magnetic field according to claim 1 and 2, is characterized in that: described housing (1) is ceramic shell or macromolecular material housing.
4. a kind of optical fiber detector for magnetic field according to claim 1 and 2, is characterized in that: described housing (1) is aluminum enclosure, titanium housing or copper shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210457600.1A CN103809134A (en) | 2012-11-14 | 2012-11-14 | Optical fiber magnetic field detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210457600.1A CN103809134A (en) | 2012-11-14 | 2012-11-14 | Optical fiber magnetic field detection device |
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| Publication Number | Publication Date |
|---|---|
| CN103809134A true CN103809134A (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210457600.1A Pending CN103809134A (en) | 2012-11-14 | 2012-11-14 | Optical fiber magnetic field detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957365A (en) * | 2018-05-18 | 2018-12-07 | 京东方科技集团股份有限公司 | A kind of magnetic field sensor |
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2012
- 2012-11-14 CN CN201210457600.1A patent/CN103809134A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957365A (en) * | 2018-05-18 | 2018-12-07 | 京东方科技集团股份有限公司 | A kind of magnetic field sensor |
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Application publication date: 20140521 |