CN108196208B - Super magnetostriction magnetic field sensor based on novel miniature fiber bragg grating sensor - Google Patents
Super magnetostriction magnetic field sensor based on novel miniature fiber bragg grating sensor Download PDFInfo
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- CN108196208B CN108196208B CN201810126631.6A CN201810126631A CN108196208B CN 108196208 B CN108196208 B CN 108196208B CN 201810126631 A CN201810126631 A CN 201810126631A CN 108196208 B CN108196208 B CN 108196208B
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- 239000000835 fiber Substances 0.000 title claims abstract description 68
- 239000000463 material Substances 0.000 claims abstract description 39
- 238000004806 packaging method and process Methods 0.000 claims abstract description 20
- 229920001410 Microfiber Polymers 0.000 claims description 9
- 239000003658 microfiber Substances 0.000 claims description 9
- 239000013307 optical fiber Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- -1 acrylic ester Chemical class 0.000 claims 1
- 238000004026 adhesive bonding Methods 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 125000005396 acrylic acid ester group Chemical group 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
- G01R33/0327—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect with application of magnetostriction
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention provides a giant magnetostrictive magnetic field sensor based on a novel miniature fiber bragg grating sensor, and belongs to the technical field of fiber optic sensing. The sensor comprises a giant magnetostrictive material, and the length L; the miniature fiber Bragg grating sensor comprises a uniform fiber Bragg grating, wherein the length of the fiber Bragg grating is l; packaging sleeve with length of (L-L)/2; longitudinally arranged along the giant magnetostrictive material, namely, in the magnetostrictive direction; the detachable miniature fiber bragg grating sensor clamp comprises a clamping plate and a bolt. The invention has the advantages of high sensitivity, good stability, high response speed, simple structure, convenient installation, strong applicability and the like.
Description
Technical Field
The invention belongs to the technical field of fiber bragg grating sensing, and relates to a giant magnetostrictive magnetic field sensor based on a novel miniature fiber bragg grating sensor.
Background
Along with the continuous development of science and technology, the application of magnetic fields is more and more extensive, and the importance of the magnetic fields is increasingly highlighted in the fields of mineral exploration, earthquake prediction, medical imaging, electrical engineering and the like. Therefore, the accurate and effective measurement of the magnetic field is of great importance. At present, the magnetic field measurement methods commonly used in China mainly comprise a magnetic method, an electromagnetic induction method, a magnetic saturation method, a Hall effect method, a magneto-resistance effect method and the like, magnetic field sensors of different principles have different characteristics, correspondingly have different application occasions and use conditions, such as the magneto-resistance effect method, and are generally only suitable for low-temperature environments and stronger magnetic fields due to the limitation of nonlinearity and dependence on temperature. The invention converts the magnetic field change into the strain change of the giant magnetostrictive material, indirectly measures the magnetic field change by measuring the strain change through the fiber bragg grating sensing technology, fully exerts the advantages of the fiber bragg grating sensing technology, and has high measurement accuracy, high response speed and good long-term stability; and the magnetic field sensor has simple structure, strong applicability and good application prospect.
However, the fiber grating is directly adhered to the giant magnetostrictive rod in the conventional giant magnetostrictive magnetic field sensor based on the fiber grating, and the length of the giant magnetostrictive rod is usually smaller, so that the problems of low sensitivity, poor stability and the like are generally caused.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: provides a giant magnetostrictive magnetic field sensor based on a novel miniature fiber bragg grating sensor to improve detection sensitivity and stability, compared with a direct sticking mode of bare fiber bragg gratings, the sensitivity can be improved by L/L times, wherein L is the length of the giant magnetostrictive material, L is the length of the fiber bragg gratings, andthe sensor is fixed in a clamp mode, so that the sensor is simple and convenient to install and detach and good in stability.
The technical scheme of the invention is as follows:
the giant magnetostrictive magnetic field sensor based on the novel miniature fiber bragg grating sensor comprises a giant magnetostrictive material 1 and a novel miniature fiber bragg grating sensor 2 arranged along the magnetostriction direction of the giant magnetostrictive material;
the giant magnetostrictive material 1 is a cylinder or a cuboid made of TeDyFe material and is fixed with the miniature fiber bragg grating sensor through a clamp; the length direction of the giant magnetostrictive material 1 is the magnetostrictive direction, and the magnetostriction coefficient is 1500-2000 ppm; the giant magnetostrictive material 1 is grooved along the length direction, the section of the groove is semicircular, and the diameter d g Equal to the diameter D of the encapsulation sleeve 5;
the miniature fiber Bragg grating sensor 2 comprises a uniform fiber Bragg grating 4 and a packaging sleeve 5; the length L of the miniature fiber bragg grating sensor w The length L of the micro fiber grating sensor is equal to that of the giant magnetostrictive material 1, and the micro fiber grating sensor is arranged in the groove of the giant magnetostrictive material 1 along the length direction;
the packaging sleeve 5 is arranged at two ends of the uniform fiber Bragg grating 4, and the length is (L-L)/2;
the miniature fiber bragg grating sensor clamp comprises a clamping plate 6 and bolts 7, wherein the clamping plate 6 is tightly fixed at two ends of the giant magnetostrictive material 1 in the length direction through the bolts 7.
The length L of the giant magnetostrictive material 1 is selected according to actual use and is larger than the length L of the uniform fiber Bragg grating in the miniature fiber Bragg grating sensor.
The upper clamping plate 6 of the miniature fiber bragg grating sensor clamp is subjected to grooving treatment, the cross section of the groove is semicircular, and the cross section diameter d is the same as the cross section diameter d b Equal to the diameter D of the encapsulation sleeve 5.
The packaging sleeve 5 is made of a steel pipe with higher elastic modulus, and E is approximately equal to 200GPa; the packaging sleeve 5 and the optical fiber part of the uniform optical fiber Bragg grating 4 are tightly combined through epoxy resin or acrylic acid ester adhesive.
The miniature fiber bragg grating sensor clamp is detachable.
The invention has the beneficial effects that: the invention relates to a giant magnetostrictive magnetic field sensor based on a novel miniature fiber Bragg grating sensor, which is self-developed and comprises a uniform fiber Bragg grating; the packaging sleeve is made of a steel tube with higher elastic modulus (E is approximately 200 GPa). The elastic modulus of the packaging sleeve is large enough, the deformation is tiny and negligible in the use environment, so that the magnetostriction quantity DeltaL of the giant magnetostrictive material under the action of the magnetic field is equal to the telescoping quantity DeltaL of the fiber bragg grating, the detection sensitivity of the giant magnetostrictive magnetic field sensor can be improved by L/L times, and the stability of the packaged miniature fiber bragg grating sensor is obviously improved; the detachable miniature fiber bragg grating sensor clamp is introduced, and is fixed by bolts, so that the installation is convenient, and the stability is good; and meanwhile, the device has the advantages of high response speed, simple structure, strong applicability and the like.
Drawings
FIG. 1 is a schematic diagram of a giant magnetostrictive magnetic field sensor based on a novel miniature fiber bragg grating sensor.
FIG. 2 is a cross-sectional view of a giant magnetostrictive magnetic field sensor based on a novel miniature fiber bragg grating sensor.
Fig. 3 is an axial cross-sectional view of the novel miniature fiber bragg grating sensor.
In the figure: 1, giant magnetostrictive material; 2 a miniature fiber bragg grating sensor;
3, a miniature fiber bragg grating sensor clamp; 4, uniformly preparing an optical fiber Bragg grating; 5, packaging the sleeve; 6, clamping plates;
7 bolts.
Detailed Description
The invention will be further described with reference to the accompanying drawings and technical solutions, but the invention is not limited thereto.
The axial sectional view and the axial sectional view of the giant magnetostrictive magnetic field sensor based on the novel miniature fiber bragg grating sensor provided by the invention are shown in figures 1 and 2: comprises a giant magnetostrictive material 1 and a novel miniature fiber bragg grating sensor 2 arranged along the magnetostrictive direction;
the giant magnetostrictive material 1 is a cylinder or a cuboid made of TeDyFe material and is fixed by a miniature fiber bragg grating sensor clamp; the length direction of the giant magnetostrictive material 1 is the magnetostrictive direction, and the magnetostriction coefficient is 1500-2000 ppm; the giant magnetostrictive material 1 is grooved along the length direction, the section of the groove is semicircular, and the diameter d g Equal to the diameter D of the encapsulation sleeve 5;
the miniature fiber Bragg grating sensor 2 comprises a uniform fiber Bragg grating 4 and a packaging sleeve 5; the length L of the miniature fiber bragg grating sensor w The length L of the micro fiber grating sensor is equal to that of the giant magnetostrictive material 1, and the micro fiber grating sensor is arranged in the groove of the giant magnetostrictive material 1 along the length direction;
the packaging sleeve 5 is arranged at two ends of the uniform fiber Bragg grating 4, and the length is (L-L)/2;
the miniature fiber bragg grating sensor clamp comprises a clamping plate 6 and bolts 7, wherein the clamping plate 6 is tightly fixed at two ends of the giant magnetostrictive material 1 in the length direction through the bolts 7.
The length L of the giant magnetostrictive material 1 is selected according to actual use and is larger than the length L of the uniform fiber Bragg grating in the miniature fiber Bragg grating sensor.
The upper clamping plate 6 of the miniature fiber bragg grating sensor clamp is subjected to grooving treatment, the cross section of the groove is semicircular, and the cross section diameter d is the same as the cross section diameter d b Equal to the diameter D of the encapsulation sleeve 5.
The packaging sleeve 5 is made of a steel pipe with higher elastic modulus, and E is approximately equal to 200GPa; the packaging sleeve 5 and the optical fiber part of the uniform optical fiber Bragg grating 4 are tightly combined through epoxy resin or acrylic acid ester adhesive.
The working principle of the giant magnetostrictive magnetic field sensor based on the novel miniature fiber bragg grating sensor is shown in figure 1: under the action of an external magnetic field, the giant magnetostrictive material 1 generates tensile strain (or compressive strain) along the length direction, and the novel miniature fiber bragg grating sensor 2 measures the magnetic flux density acting on the giant magnetostrictive material 1 by measuring the strain along the length direction.
The novel micro fiber grating sensor-based giant magnetostrictive magnetic field sensor measures the magnetic field acting on the giant magnetostrictive material by measuring the wavelength offset of the fiber grating.
Claims (3)
1. The giant magnetostrictive magnetic field sensor based on the miniature fiber bragg grating sensor is characterized by comprising a giant magnetostrictive material (1) and a miniature fiber bragg grating sensor (2) arranged along the magnetostriction direction of the giant magnetostrictive material;
the giant magnetostrictive material (1) is a cylinder or a cuboid made of TeDyFe material and is fixed with the miniature fiber bragg grating sensor through a clamp; the length direction of the giant magnetostrictive material (1) is the magnetostrictive direction, and the magnetostriction coefficient is 1500-2000 ppm; the giant magnetostrictive material (1) is grooved along the length direction, the cross section of the groove is semicircular, and the diameter d g The diameter D of the packaging sleeve (5) of the miniature fiber bragg grating sensor is equal to that of the packaging sleeve;
the miniature fiber Bragg grating sensor comprises a uniform fiber Bragg grating (4) and a packaging sleeve (5); the length L of the miniature fiber bragg grating sensor w The micro fiber grating sensor is equal to the length L of the giant magnetostrictive material (1), and is arranged in the groove of the giant magnetostrictive material (1) along the length direction of the giant magnetostrictive material;
the packaging sleeves (5) are arranged at two ends of the uniform fiber Bragg grating (4), the length is (L-L)/2, and L is the length of the uniform fiber Bragg grating (4);
the miniature fiber bragg grating sensor clamp comprises a clamping plate (6) and bolts (7), wherein the clamping plate (6) is tightly fixed at two ends of the giant magnetostrictive material (1) in the length direction through the bolts (7);
the upper clamping plate (6) of the miniature fiber bragg grating sensor clamp is subjected to grooving treatment, the cross section of the groove is semicircular, and the cross section diameter d is the same as that of the groove b The diameter D of the packaging sleeve (5) of the miniature fiber bragg grating sensor is equal to that of the packaging sleeve;
the packaging sleeve (5) is made of a steel pipe with higher elastic modulus, and E is approximately equal to 200GPa; the packaging sleeve (5) and the optical fiber part of the uniform optical fiber Bragg grating (4) are tightly combined through epoxy resin or acrylic ester gluing.
2. The micro fiber grating sensor-based giant magnetostrictive magnetic field sensor according to claim 1, wherein the length L of the giant magnetostrictive material (1) is selected according to practical use and is greater than the length L of the uniform fiber Bragg grating (4) in the micro fiber grating sensor (2).
3. The giant magnetostrictive magnetic field sensor based on micro fiber bragg grating sensor according to claim 1 or 2,
the miniature fiber bragg grating sensor clamp is characterized in that the miniature fiber bragg grating sensor clamp can be detached and replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810126631.6A CN108196208B (en) | 2018-02-07 | 2018-02-07 | Super magnetostriction magnetic field sensor based on novel miniature fiber bragg grating sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810126631.6A CN108196208B (en) | 2018-02-07 | 2018-02-07 | Super magnetostriction magnetic field sensor based on novel miniature fiber bragg grating sensor |
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| Publication Number | Publication Date |
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| CN108196208A CN108196208A (en) | 2018-06-22 |
| CN108196208B true CN108196208B (en) | 2024-02-06 |
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| CN201810126631.6A Active CN108196208B (en) | 2018-02-07 | 2018-02-07 | Super magnetostriction magnetic field sensor based on novel miniature fiber bragg grating sensor |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108957364A (en) * | 2018-07-04 | 2018-12-07 | 兰州大学 | A kind of magnetic field sensor and Measurement Method for Magnetic Field |
| CN110554251A (en) * | 2019-09-09 | 2019-12-10 | 中国电力科学研究院有限公司 | Electric field intensity measuring sensor and electric field intensity measuring device comprising same |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2646718Y (en) * | 2003-08-01 | 2004-10-06 | 中国科学院半导体研究所 | Magnetostriction type optical fiber raster current sensor |
| CN101324448A (en) * | 2008-07-28 | 2008-12-17 | 西安石油大学 | Encapsulation apparatus for exerting prestress of optical fiber grating sensor |
| CN101598773A (en) * | 2009-07-02 | 2009-12-09 | 西北工业大学 | A kind of magnetic induction intensity sensing head and magnetic induction intensity measurement method and device thereof |
| CN101833023A (en) * | 2009-03-09 | 2010-09-15 | 西北工业大学 | Sensing head of temperature self-compensating fiber grating current sensor and manufacturing method thereof |
| CN101833022A (en) * | 2009-03-09 | 2010-09-15 | 西北工业大学 | Sensing head of fiber Bragg grating current sensor and making method thereof |
| CN102230834A (en) * | 2011-06-03 | 2011-11-02 | 大连理工大学 | Fiber grating cable tension transducer with temperature self-compensation function |
| CN103760504A (en) * | 2014-01-16 | 2014-04-30 | 昆明理工大学 | Fiber Bragg optical grating spatial magnetic field intensity sensor based on giant magnetostriction materials and use method of fiber Bragg optical grating spatial magnetic field intensity sensor |
-
2018
- 2018-02-07 CN CN201810126631.6A patent/CN108196208B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2646718Y (en) * | 2003-08-01 | 2004-10-06 | 中国科学院半导体研究所 | Magnetostriction type optical fiber raster current sensor |
| CN101324448A (en) * | 2008-07-28 | 2008-12-17 | 西安石油大学 | Encapsulation apparatus for exerting prestress of optical fiber grating sensor |
| CN101833023A (en) * | 2009-03-09 | 2010-09-15 | 西北工业大学 | Sensing head of temperature self-compensating fiber grating current sensor and manufacturing method thereof |
| CN101833022A (en) * | 2009-03-09 | 2010-09-15 | 西北工业大学 | Sensing head of fiber Bragg grating current sensor and making method thereof |
| CN101598773A (en) * | 2009-07-02 | 2009-12-09 | 西北工业大学 | A kind of magnetic induction intensity sensing head and magnetic induction intensity measurement method and device thereof |
| CN102230834A (en) * | 2011-06-03 | 2011-11-02 | 大连理工大学 | Fiber grating cable tension transducer with temperature self-compensation function |
| CN103760504A (en) * | 2014-01-16 | 2014-04-30 | 昆明理工大学 | Fiber Bragg optical grating spatial magnetic field intensity sensor based on giant magnetostriction materials and use method of fiber Bragg optical grating spatial magnetic field intensity sensor |
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| CN108196208A (en) | 2018-06-22 |
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