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Magnetic field detection system based on giant magnetostrictive film

A technology of giant magnetostriction and detection system, which is applied in the use of magneto-optical equipment for magnetic field measurement, the size/direction of the magnetic field, etc., which can solve the problems of difficult magnetic field detection, large volume, interference, etc., and achieve a large magnetostrictive coefficient , Improve the detection accuracy, the effect of large magnetostriction

Inactive Publication Date: 2018-01-26
于盟盟
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Problems solved by technology

[0003] The current magnetic field sensors are mainly based on mechanisms such as Hall effect, magnetoresistance effect, fluxgate effect, tunnel effect and nuclear magnetic resonance effect. Interference, which limits the further improvement of sensor detection accuracy
Traditional magnetic field sensors are bulky and difficult to detect magnetic fields in narrow spaces

Method used

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  • Magnetic field detection system based on giant magnetostrictive film

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Embodiment Construction

[0024] figure 1 It is a schematic structural diagram of a magnetic field detection system for a giant magnetostrictive film according to an embodiment of the present invention. Such as figure 1 As shown, the present invention provides a kind of magnetic field detection system based on the giant magnetostrictive film, including LD light source 1, optical fiber directional coupler 2, photodetector 3, matching liquid 5, Y-type optical fiber body and magnetic field sensor, wherein, The magnetic field sensor includes a first sensing probe 8 and a second sensing probe 9 . The first sensing probe 8 is directly constructed at the first end 6 of the Y-shaped optical fiber body, and is used to detect the temperature in the magnetic field as a basis for temperature compensation. The second sensing probe is used to detect the magnetic field strength in the magnetic field, wherein the second sensing probe 9 includes a D-type fiber grating cantilever beam, a metal film 102 and a giant mag...

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Abstract

The invention provides a magnetic field detection system based on a giant magnetostrictive film and relates to the technical field of a fiber sensor. The system comprises an LD light source, a fiber directional coupler, a photoelectric detector, matching liquid, a Y-shaped fiber body and a magnetic field sensor, wherein the magnetic field sensor comprises a first sensing probe and a second sensingprobe, the first sensing probe is directly constructed at a first end portion of the Y-shaped fiber body and is used for detecting temperature in the magnetic field as temperature compensation basis,the second sensing probe comprises a D-type fiber grating suspension beam, a metal film and the giant magnetostrictive film, the D-type fiber grating suspension beam is directly constructed at a second end portion of the Y-shaped fiber body, the metal film is coated at an upper surface of the D-type fiber grating suspension beam, and the giant magnetostrictive film is arranged at the surface of the metal film to induct intensity of the induction magnetic field. The system is advantaged in that the system works under all-optical excitation conditions, interference on the to-be-detected magnetic field is avoided, the volume is small, and the system is suitable for being used in the narrow space.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to a magnetic field detection system based on giant magnetostrictive films. Background technique [0002] Magnetic field measurement is an important branch of electromagnetic measurement technology. Magnetic field measurement is involved in many fields of industrial production and scientific research. Such as: current measurement, magnetic prospecting, maglev train, geological exploration, isotope separation, mass spectrometer, electron beam and ion beam processing device, controlled thermonuclear reaction, and artificial earth satellite, etc., and even has applications in medicine and biology. For example, magnetic field therapy to treat diseases, use "magnetocardiogram" and "magnetoencephalogram" to diagnose diseases, the effect of environmental magnetic field on organisms and human body, and the research of magnetic phenomena and life phenomena all require magnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032
Inventor 于盟盟
Owner 于盟盟
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