Sheet type giant magnetostrictive magnetic field sensor based on fiber Bragg grating

A giant magnetostrictive and magnetic field sensor technology, which is applied in the use of magneto-optical equipment for magnetic field measurement, the size/direction of the magnetic field, etc., can solve problems such as difficult to use magnetic field measurement, and achieve high reliability, strong anti-interference ability, Ease of forming a sensor network

Inactive Publication Date: 2015-03-11
WUHAN UNIV OF TECH
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Problems solved by technology

[0003] However, the fiber grating-based giant magnetostrictive magnetic field sensor currently used more is to paste the fiber grating on the giant magnetostrictive rod along the magnetostrictive direction. The length of the giant magnetostrictive rod is usually 10-30mm, which can be used Magnetic field measurement in a large space, but it is difficult to measure the magnetic field in a narrow gap, such as the air gap magnetic field measurement of magnetic bearings or motors, etc.

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  • Sheet type giant magnetostrictive magnetic field sensor based on fiber Bragg grating
  • Sheet type giant magnetostrictive magnetic field sensor based on fiber Bragg grating
  • Sheet type giant magnetostrictive magnetic field sensor based on fiber Bragg grating

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the present invention is not limited.

[0021] The sheet type giant magnetostrictive magnetic field sensor based on fiber grating provided by the present invention has a structure such as figure 1 Shown: including giant magnetostrictive sheet 1 and fiber grating 2. The magnetostriction of the giant magnetostrictive sheet 1 is along its thickness direction. The fiber grating 2 is perpendicular to the magnetostrictive direction of the giant magnetostrictive sheet 1, and it is pasted on the side along the length L direction of the giant magnetostrictive sheet 1 to form a sheet-type giant magnetostrictive magnetic field sensor based on a fiber grating.

[0022] The giant magnetostrictive sheet 1 is a sheet made by cutting a TeDyFe rod.

[0023] The thickness t direction of the giant magnetostrictive sheet 1 is the magnetostrictive direction, and the mag...

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Abstract

The invention relates to a sheet type giant magnetostrictive magnetic field sensor based on a fiber Bragg grating. The sensor includes a giant magnetostrictive sheet (1) and the fiber Bragg grating (2), wherein the fiber Bragg grating (2) is adhered to one side surface of the giant magnetostrictive sheet (1) and is perpendicular to the magnetostriction direction. The sensor provided by the invention has the advantages of high anti-jamming capability, high reliability, passivity, high convenience in establishing a sensor network, etc.

Description

technical field [0001] The invention relates to the technical field of magnetic field sensing and measurement, in particular to a thin-sheet giant magnetostrictive magnetic field sensor based on an optical fiber grating. Background technique [0002] Under the action of an external magnetic field, the giant magnetostrictive material will elongate or shorten in its magnetization direction, the magnetostriction coefficient can reach 1500-2000ppm, and it has the advantages of wide response frequency, short response time and high reliability. Combining fiber gratings with giant magnetostrictive materials can convert the strain of giant magnetostrictive materials into the drift of the central reflection wavelength of the fiber Bragg grating, and the magnitude of the magnetic field can be measured by measuring the drift of the central reflection wavelength of the fiber Bragg grating. This kind of magnetic field sensor has unique advantages such as strong anti-interference ability,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
Inventor 丁国平
Owner WUHAN UNIV OF TECH
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