White-light interferometric fiber integrated universal bending sensor

A technology of universal bending and white light interference, which is applied in the field of optical fibers, can solve problems such as the inability to eliminate the influence of temperature factors, achieve the effects of eliminating temperature cross-sensitivity effects, eliminating temperature cross-sensitivity effects, and improving high temperature resistance

Active Publication Date: 2019-06-04
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Angle sensing based on this method has the characteristics of strong detection signal, high signal-to-noise ratio, and high sensitivity, but it can only achieve bending measurement in a single direction, and the influence of temperature factors cannot be ruled out.

Method used

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  • White-light interferometric fiber integrated universal bending sensor
  • White-light interferometric fiber integrated universal bending sensor
  • White-light interferometric fiber integrated universal bending sensor

Examples

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Embodiment

[0045] Example: see Figure 4 , the figure is an application based on the present invention - white light interference type universal bending 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 universal bending 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 returned from the white light interferometric fiber integrated gimbal bending sensor interference signal.

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Abstract

The invention discloses a white-light interferometric fiber integrated universal bending sensor, which is mainly characterized in that: the sensor is composed of three parts such as a double-clad optical fiber 1, a four-core optical fiber and an end surface reflective film, and is a universal bending sensor integrated on one optical fiber. The white-light interferometric fiber integrated universalbending sensor disclosed by the invention can realize the simultaneous measurement of a bending angle and a bending direction, is particularly suitable for use under high temperature conditions due to the inherent features of the white-light interferometric fiber integrated torsion sensor; in addition, the white-light interferometric fiber integrated universal bending sensor has the advantages ofhigh sensitivity, compact structure, low cost and the like.

Description

(1) Technical field [0001] The invention belongs to the field of optical fiber technology, and in particular relates to a white light interference fiber integrated universal bending sensor. (2) Background technology [0002] Optical fiber white light interferometry can be used to measure physical quantities such as strain and temperature, and can also be used to measure angles. A typical application is an optical fiber inclinometer, which converts the inclination angle into displacement for measurement, and can be used to monitor the inclination of bridges and towers and other building structures. [0003] Multi-core optical fiber was proposed in the 1970s to solve the problem of reducing the cost of optical fiber cables and increasing the density of optical fiber cables. With the development of multi-core fiber technology, the application of multi-core fiber is becoming more and more extensive, not only in the field of optical communication, but also in the field of fiber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
Inventor 苑立波李文超
Owner GUILIN UNIV OF ELECTRONIC TECH
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