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A kind of optical fiber electromagnetic sensor and preparation method thereof

A technology of electromagnetic sensors and optical fiber devices, which is applied in the fields of electromagnetic field characteristics, instruments, measurement of electrical variables, etc., can solve the problems of elasticity, flexibility and stability not meeting the elastic suspension film, etc., and achieve the effect of good electromagnetic sensitivity characteristics.

Active Publication Date: 2020-07-21
黄辉 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electromagnetic membrane can only be composed of some specific materials, and its elasticity, flexibility and stability usually do not meet the requirements of elastic suspension membranes.

Method used

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  • A kind of optical fiber electromagnetic sensor and preparation method thereof
  • A kind of optical fiber electromagnetic sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First, if figure 1 As shown, utilize 30 micron thick quartz flakes as elastic suspension film 6, then paste one deck magnetic small cylinder 7 on the quartz thin slice outer surface, the diameter of magnetic small cylinder 7 is 0.1mm, height is 0.05mm, magnetic small cylinder The spacing between the bodies is 0.1 mm. The magnetic small cylinder has magnetism and is used as the electromagnetic particle 7 .

[0038] Next, paste the elastic suspension film 6 with electromagnetic particles 7 on the end face of the sleeve 3, then fix the fiber collimator 2 on the inner wall of the sleeve 3, and make the parallel light beam 4 emitted by the collimator 2 vertical incident on the elastic suspension membrane 6. The elastic suspension film 6 reflects the light beam 4 back to the fiber collimator 2 .

[0039] When an alternating magnetic field is applied, the electromagnetic particles 7 are subjected to the force of the magnetic field, causing the elastic suspension film 6 to d...

Embodiment 2

[0041] First, if figure 2 As shown, a 20-micron thick silicon wafer is used as the elastic suspension film 6, and then a layer of charged balls 7 is pasted on the inner surface of the silicon wafer. The diameter of the charged balls is 0.01 mm, and the distance between the charged balls is 0.01 mm. mm. The charged pellets serve as electromagnetic particles 7 .

[0042]Next, the suspension film 6 with electromagnetic particles 7 is pasted on the end face of the sleeve 3, and then the fiber collimator 2 is fixed on the inner wall of the sleeve 3, and the parallel beam 4 emitted by the collimator 2 is vertically incident to the suspension membrane 6. The suspension film 6 reflects the light beam 4 back to the fiber collimator 2 .

[0043] When an electric field is applied, the electromagnetic particles 7 are subjected to the force of the electric field, causing the elastic suspension film 6 to deform, causing the incident angle of the reflected beam 5 to change, thereby chang...

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Abstract

The invention relates to an optical fiber electromagnetic sensor and a preparation method therefor. The optical fiber electromagnetic sensor comprises an optical fiber, an optical fiber device, a sleeve, and an elastic suspensory membrane. The electromagnetic sensor is characterized in that the optical fiber is connected to the optical fiber device; the optical fiber sensor is disposed on the sleeve; the elastic suspensory membrane is disposed on an end face of the sleeve, and is provided with electromagnetic particles in an attached manner; an electromagnetic field generates an acting force for the electromagnetic particles, so as to arouse the deformation of the elastic suspensory membrane; an emergent light beam emitted by the optical fiber device is reflected by the deformed elastic suspensory membrane to the optical fiber device. The beneficial effects of the invention are that the surface of the elastic suspensory membrane is provided with the electromagnetic particles in the attached manner, thereby solving the problems of flexibility, elasticity and stability of an electromagnetic film; there are gaps between the electromagnetic particles; the electromagnetic particles do not press against each other during the deformation of the elastic suspensory membrane, thereby causing no impact on the elastic suspensory membrane, and causing no impact on the sensitivity and stability of the sensor; moreover, the sensor is good in electromagnetic sensitivity.

Description

technical field [0001] The invention relates to an optical fiber electromagnetic sensor and a preparation method thereof, which can be used to detect magnetic fields and electric fields in the environment. Background technique [0002] Optical fiber sensors use light as the carrier and optical fiber as the medium to perceive and transmit external signals, and are suitable for harsh environments such as flammable, explosive, and electromagnetic interference (see IEEE Sensors Journal, vol.8, pp.1184-1193, 2008 ). [0003] Fiber optic sensors are usually divided into fiber grating structures and elastic suspension membrane structures: (1) fiber grating sensors need to be equipped with tunable lasers or spectrum analyzers to monitor the reflection wavelength, so the system is expensive; (2) fiber optics based on elastic suspension membranes The sensor detects the deformation of the suspension film by monitoring the light intensity change reflected by the suspension film instead...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/08
CPCG01R29/0885
Inventor 黄辉渠波蔡伟成徐思宇
Owner 黄辉
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