Electrostrictive effect based fiber bragg grating magnetic field sensor and application method thereof

A magnetic field sensor and telescopic technology, applied in the size/direction of the magnetic field, the use of electromagnetic devices for magnetic field measurement, instruments and other directions, which can solve the problem of measurement sensitivity and other issues
CN103645447AActive Publication Date: 2014-03-19KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2014-03-19

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Abstract

The invention relates to an electrostrictive effect based fiber bragg grating magnetic field sensor and an application method thereof, and belongs to the technical field of optoelectronic measurement. The electrostrictive effect based fiber bragg grating magnetic field sensor comprises a DC asynchronous motor, a motor rotating shaft, a commutator, a brush, a rectangular coil, a bridge rectifier diode, a filtering capacitor, a protective resistor, a fiber bragg grating, piezoelectric ceramic, bonding points and an external extraction optical fiber, wherein the DC asynchronous motor, the motor rotating shaft, the commutator and the rectangular coil are fixed together, the brush is contacted with the commutator, a contact of the brush is connected with the bridge rectifier diode through a wire, a leading-out end of the bridge rectifier diode is connected with the filtering capacitor and the protective resistor, the fiber bragg grating is bonded to the piezoelectric ceramic through the two bonding points and connected with the external extraction optical fiber. The electrostrictive effect based fiber bragg grating magnetic field sensor improves the deformation quantity of the piezoelectric ceramic, expands the measurement range of a magnetic field, and is high in anti-interference capacity, simple in structure and convenient to use.
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Description

technical field

[0001] The invention relates to an optical fiber Bragg grating magnetic field sensor based on an electrostrictive effect and a method for using the same, belonging to the technical field of optoelectronic measurement. Background technique

[0002] In many fields of industrial production and scientific research, people are involved in magnetic field measurement issues, such as magnetic prospecting, geological exploration, magnetic material research, magnetic navigation, isodigit separation, controlled thermonuclear reactions and artificial earth satellites. With the development of high-voltage direct current transmission and transformation, the monitoring of the magnetic field around substations and high-voltage transmission lines is of great significance to the safe operation of the power grid. For this reason, the optical fiber Bragg grating magnetic field sensor with electrical insulation, anti-electromagnetic interference, and all-optical communication has...

Claims

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