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Method of inducing grating deformation based on ultrasonic pulse and used for measuring strain

An ultrasonic pulse and grating technology, applied in the field of fiber grating, can solve problems such as limitations and achieve the effect of accurate accuracy

Active Publication Date: 2016-08-24
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the traditional optical fiber sensor only improves the accuracy of the sensor by changing the light source and the material of the optical fiber itself, which is greatly limited.

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  • Method of inducing grating deformation based on ultrasonic pulse and used for measuring strain
  • Method of inducing grating deformation based on ultrasonic pulse and used for measuring strain
  • Method of inducing grating deformation based on ultrasonic pulse and used for measuring strain

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Embodiment Construction

[0035] The objects and functions of the present invention and methods for achieving the objects and functions will be clarified by referring to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is only to help those skilled in the relevant art comprehensively understand the specific details of the present invention.

[0036] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0037] The present invention provides a method for measuring strain based on ultrasonic pulse induced grating deformation, in this embodiment, as figure 1 The optical fiber sensor measurement system for strain measurement of the present invention is shown, and the system includes a pump so...

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Abstract

The present invention provides a method of inducing grating deformation based on an ultrasonic pulse and used for measuring strain. The method for measuring the strain comprises the following steps a) overlapping an optical fiber sensor strain measurement system, wherein the system comprises a segment of optical fiber with a continuous and uniform grating, an ultrasonic generator and a demodulator, the optical fiber with the continuous and uniform grating is equipped with multiple segments of grating, the grids of each segment of grating are distributed evenly, and the grating intervals are same; b) attaching the optical fiber sensor strain measurement system to a to-be-measured strain material, and recording a spacing that an off-peak deviates a main peak and acquired by the demodulator; c) comparing the spacing that the off-peak deviates the main peak in the step b) with a relation curve that the spacing that the off-peak deviates the main peak changes along the strain to obtain the material strain.

Description

technical field [0001] The present invention relates to the field of fiber grating technology, in particular to a method for measuring strain based on ultrasonic pulse-induced grating deformation Background technique [0002] Usually, the purpose of measurement is to obtain the relevant information of the research object, and perform corresponding processing, and then control the object. The completion of this functional operation is the sensing technology. The basic working principle of the optical fiber sensor is to send the light from the light source to the modulator through the optical fiber, and after the parameter to be measured interacts with the light entering the modulation area, the optical properties of the light (such as light intensity, wavelength, frequency, phase, Normal state, etc.) changes, called the modulated signal light, which is sent to the photodetector through the optical fiber, and after demodulation, the measured parameters are obtained. In recent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
CPCG01B11/16
Inventor 刘峰祝连庆何巍骆飞董明利张钰民闫光
Owner BEIJING INFORMATION SCI & TECH UNIV