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Fibre-optic grating two-D sensor

A two-dimensional sensor, fiber grating technology, applied in the field of sensing

Inactive Publication Date: 2003-04-23
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The search results show that: among the known optical fiber sensors, there has not been a fiber grating two-dimensional sensor that uses a rectangular beam structure and uses a double fiber grating string for two-dimensional real-time sensing of stress and displacement

Method used

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  • Fibre-optic grating two-D sensor
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  • Fibre-optic grating two-D sensor

Examples

Experimental program
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Embodiment Construction

[0022] Basic structure of the present invention is as shown in accompanying drawing:

[0023] Fiber Bragg Grating 1, Optical Fiber 2, Rectangular Elastic Beam 3, Fixed End 4, Beam Length 5, Beam Width 6, Beam Thickness 7, Stress 8, Fiber Connector 9, Fiber Coupler 10, Matching Liquid 11, Light Source 12, Wavelength Tester 13, O / E circuit 14, data processor 15, display 16, sensing signal 17, signal digitization 18, data screening 19, logic judgment 20, sensing matrix calculation 21, data storage 22, data output 23.

[0024] In the specific implementation example of the present invention image 3 Among them, the sensor includes fiber Bragg grating 1, single-mode fiber 2, plexiglass rectangular beam 3, iron metal fixed end 4, heat shrinkable sleeve 9, 2×2 fiber coupler 10, matching liquid 11, broadband light source 12, F-P wavelength Tester 13, O / E circuit 14, data processor 15, display 16, etc. The two fiber gratings in the double grating string are respectively glued with 102...

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Abstract

The optical-fiber grating two-D sensor for two-D real time detection of parameters of stress, pressure and displacement, etc. belongs to the field of sensing technology. The base unit of said invented sensor is a double-grating string, two optical fiber gratingsin the double-grating string are respectively adhered to the adjacent two sides urfaces along the cross line of neutral surface and surface of rectangular elastic beam by using ahhesive. Its connection mode has two kinds: reflective connection and transmission connection. Said invention adopts said structure and can convert the light signal obtained by the above-mentioned grating component into electric signal by using O / E circuit so as to implement high accurate real time detection of two-D stress state and deformation state of tested body.

Description

technical field [0001] The invention relates to the manufacture of an optical fiber sensor, in particular to a two-dimensional optical fiber grating sensor. A fiber grating two-dimensional sensor can be used to perform two-dimensional high-precision real-time monitoring and measurement of parameters such as stress and displacement, and belongs to the field of sensing technology. Background technique [0002] Fiber Bragg Grating is a new type of optical passive device. As a sensing element, it has the excellent characteristic of directly converting the external sensing quantity into information of light wavelength change. Known fiber grating sensors (for example: CN 1334920A), its design method and implementation technology often focus on one-dimensional sensing of physical quantities such as strain, stress, pressure, and displacement. The retrieval results show that: among the known optical fiber sensors, there is no fiber grating two-dimensional sensor that adopts a rectan...

Claims

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Application Information

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IPC IPC(8): G01D5/26G01D21/02
Inventor 张伟刚开桂云董孝义
Owner NANKAI UNIV
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