Cross microbridge fiber magnetic field sensing probe based on giant magnetostrictive effect

A technology of giant magnetostriction and sensor probe, which is applied in the use of magneto-optical equipment for magnetic field measurement, magnetic field size/direction, measurement of magnetic variables, etc. The effect of range, increasing range, and simple device structure

Active Publication Date: 2017-10-13
CHINA JILIANG UNIV
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Problems solved by technology

[0003] These traditional magnetic field sensors require electrical signal excitation, and the magnetic field generated by electrical signal excitation usually produces additional interference to the measured magnetic field, thus limiting the further improvement of the detection accuracy of this type of sensor

Method used

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  • Cross microbridge fiber magnetic field sensing probe based on giant magnetostrictive effect
  • Cross microbridge fiber magnetic field sensing probe based on giant magnetostrictive effect
  • Cross microbridge fiber magnetic field sensing probe based on giant magnetostrictive effect

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Embodiment Construction

[0020] combine figure 1 , 2 As shown, the technical solution adopted in the present invention: a cross micro-suspension bridge optical fiber magnetic field sensing probe based on the giant magnetostrictive effect, including: an optical fiber 1, a symmetrical fixed support end 2, and a cross micro-suspension bridge based on the giant magnetostriction effect 3. Chromium metal film 4, giant magnetostrictive film 5.

[0021] The optical fiber end face cross micro-suspension bridge 3 with an intermediate reflector is located at the end face of the optical fiber 1 and has a length of 95 μm-105 μm, wherein the length of the intermediate reflector is 30 μm-40 μm, the width is 30 μm-40 μm, and the thickness of the micro-suspension bridge is 3 μm- 5 μm, forming an optical fiber integrated structure.

[0022] The length of the fixed support end 2 is 10 μm-15 μm, the width of the fixed support end is 15 μm-25 μm the same as the width of the optical fiber micro-suspension bridge 3, and ...

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Abstract

The invention relates to a cross microbridge fiber magnetic field sensing probe based on the giant magnetostrictive effect and belongs to the technical field of a fiber sensor. The cross microbridge fiber magnetic field sensing probe comprises a fiber, a fixing end, a cross microbridge, an intermediate reflector, a fabry-perot resonator, a chrome metal film and a giant magnetostrictive film, wherein the cross microbridge is arranged at a fiber end surface and is connected with the fiber through the fixing end, the cross microbridge and the fiber end surface form the fabry-perot resonator, and an outer surface of the cross microbridge is sequentially plated by the chrome metal film and the giant magnetostrictive film. The cross microbridge fiber magnetic field sensing probe is advantaged in that demands of a high precision detection magnetic field can be realized through employing the fabry-perot resonator, two pole plates of the fabry-perot resonator can be effectively guaranteed by the cross microbridge to be parallel, and measuring range increase is further guaranteed.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing and relates to a cross micro-suspension bridge optical fiber magnetic field sensing probe based on giant magnetostrictive effect. Background technique [0002] Current magnetic field sensors are mainly based on mechanisms such as Hall effect, magnetoresistance effect, and fluxgate effect. The Hall effect is to use free electrons to gather to both sides under the action of an external magnetic field, and form a potential difference proportional to the magnetic induction intensity; the magnetoresistive sensor is another magnetic sensor derived from the Hall sensor. The semiconductor material used is the same as the Hall effect. The sensor is generally the same, but the mechanism of the two on the magnetic field is different; the fluxgate detection instrument uses the change of the magnetic permeability of the magnetic core under the excitation of the alternating magnetic field to modul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
CPCG01R33/0327
Inventor 刘月明施阳阳韩晓红
Owner CHINA JILIANG UNIV
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