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A kind of fiber bragg grating magnetic field sensor based on electrostrictive effect and using method thereof
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A magnetic field sensor, stretching technology, applied to the size/direction of the magnetic field, the use of electromagnetic devices for magnetic field measurement, instruments, etc., can solve the problem of measurement sensitivity and other problems
Active Publication Date: 2017-04-12
KUNMING UNIV OF SCI & TECH
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[0004] The present invention provides an optical fiber Bragg grating magnetic field sensor based on the electrostrictive effect and its use method, which is formed by laminating 10 piezoelectric ceramic sheets to solve the problem of measurement sensitivity of the strain of a single piezoelectric ceramic sheet , and fiber Bragg gratings are used as sensing elements to solve the problem that traditional sensing elements can only achieve weak magnetic field measurement
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Embodiment 1
[0050] Embodiment 1: as Figure 1-2 As shown, an optical fiber Bragg grating magnetic field sensor based on the electrostrictive effect includes a DC asynchronous motor 1, a motor shaft 2, a commutator 3, a brush 4, a rectangular coil 5, a bridge rectifier diode 6, a filter capacitor 7, Protective resistor 8, fiber Bragg grating 9, piezoelectric ceramic 10, bonding point 11, externally connected optical fiber 12; DC asynchronous motor 1, motor shaft 2, commutator 3 and rectangular coil 5 are fixed together, brush 4 and The commutator 3 is in contact with each other and the contact of the brush 4 is connected to the bridge rectifier diode 6 through a wire. The point 11 is glued on the piezoelectric ceramic 10 and connected with the externally connected outgoing optical fiber 12 .
[0051] The fiber Bragg grating 9 is pasted on the central axis of the surface of the stacked piezoelectric ceramic 10 by epoxy glue.
[0052] A method for using an optical fiber Bragg grating magne...
Embodiment 2
[0057] Embodiment 2: as Figure 1-2 As shown, an optical fiber Bragg grating magnetic field sensor based on the electrostrictive effect includes a DC asynchronous motor 1, a motor shaft 2, a commutator 3, a brush 4, a rectangular coil 5, a bridge rectifier diode 6, a filter capacitor 7, Protective resistor 8, fiber Bragg grating 9, piezoelectric ceramic 10, bonding point 11, externally connected optical fiber 12; DC asynchronous motor 1, motor shaft 2, commutator 3 and rectangular coil 5 are fixed together, brush 4 and The commutator 3 is in contact with each other and the contact of the brush 4 is connected to the bridge rectifier diode 6 through a wire. The point 11 is glued on the piezoelectric ceramic 10 and connected with the externally connected outgoing optical fiber 12 .
[0058] The fiber Bragg grating 9 is pasted on the central axis of the surface of the stacked piezoelectric ceramic 10 by epoxy glue.
[0059] A method for using an optical fiber Bragg grating magne...
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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.
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...
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