A white light interferometric fiber-integrated torsion sensor

A white light interference and sensor technology, which is applied to the coupling of instruments, optical waveguides, and optical devices, can solve the problems of sensors being susceptible to electromagnetic interference and bulky volume, and achieve the effects of compact structure, high sensitivity, and improved high temperature resistance

Active Publication Date: 2021-09-28
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional torsion sensors measure torsion based on the principle of electricity or electromagnetic induction. Such sensors are susceptible to electromagnetic interference and are bulky

Method used

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  • A white light interferometric fiber-integrated torsion sensor
  • A white light interferometric fiber-integrated torsion sensor
  • A white light interferometric fiber-integrated torsion sensor

Examples

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Embodiment

[0031] Example: see Figure 5, the figure is an application based on the present invention - white light interference fiber integrated torsion sensing system. Connect the sensor to an interferometric demodulator to demodulate the four white light interference signals. In the figure, a wide-spectrum light source 7, a signal processing unit 4, an optical fiber circulator 5, and an optical path difference scanner 6 form a white light interference type torsional sensing system. The structure of the optical path difference scanner 6 can be an optical path difference scanner composed of Michlson interferometer, MZ interferometer, Fizeau interferometer, Sagnac interferometer, etc., to demodulate the white light interference signal returned from the white light interference fiber integrated torsion sensor . Figure 5 Schematic diagram of the middle test data curve. The first group in the figure is the data curve under normal conditions, and the second group is the curve after the se...

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Abstract

The invention discloses a white light interference type fiber integrated torsion sensor, the main feature of which is that the sensor is composed of a double-clad optical fiber 1, a helical four-core optical fiber 2, and an end face reflection film 3, and is integrated on an optical fiber. twist sensor. The sensor provided by the invention can realize the simultaneous measurement of the torsion angle and the direction of the torsion, and is especially suitable for high temperature conditions due to the inherent characteristics of the invention. In addition, it also has the advantages of high sensitivity, compact structure and low cost.

Description

(1) Technical field [0001] The invention belongs to the field of optical fiber technology, and in particular relates to a white light interference type fiber integrated torsion sensor. (2) Background technology [0002] The physical quantity of torsion is an important parameter that reflects the internal conditions of equipment, components, etc., so the measurement of torsion has always been the focus of research. Torsion sensor is the detection of torsional torque on various rotating or non-rotating parts. Traditional torsion sensors measure torsion based on the principle of electricity or electromagnetic induction. Such sensors are susceptible to electromagnetic interference and are bulky. The new generation of optical fiber-based torsion sensors are mostly based on fiber gratings, which have the characteristics of small size, easy bending, light weight, etc., and more importantly, they are not subject to electromagnetic interference. They are widely used in torsion Meas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/26G01P13/02G02B6/255G02B6/26
Inventor 苑立波李文超
Owner GUILIN UNIV OF ELECTRONIC TECH
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