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Design method and making process of fibre-optical grating sensitization strain transducer

A strain sensor and fiber grating technology, applied in the field of fiber grating increase and decrease sensitive strain sensor, embedded fiber grating increase and decrease sensitive strain sensor, can solve the problem of no increase or decrease sensitivity effect and the like

Inactive Publication Date: 2006-11-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, from the perspective of the increase and decrease sensitivity mechanism of the sensitive element, there are no related reports and related patents to achieve the increase and decrease sensitivity effect by changing the mechanical properties

Method used

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  • Design method and making process of fibre-optical grating sensitization strain transducer
  • Design method and making process of fibre-optical grating sensitization strain transducer
  • Design method and making process of fibre-optical grating sensitization strain transducer

Examples

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Embodiment Construction

[0031] For specific engineering applications, the following two types of fiber grating increase and decrease sensitive strain sensors are designed:

[0032] (1) For surface strain monitoring of civil engineering, adhesive fiber grating increase and decrease sensitive strain sensors are required:

[0033] designed to be attached figure 2 , attached image 3 The flakes shown have the same thickness, then formula (3-6) becomes

[0034] K = K l + h A h B k L + 1 = K l + K h K ...

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Abstract

The invention offers the designing method and manufacturing technology for the optical fiber raster fluctuating sensitive strain gage. It includes fluctuating sensitivity theoretical derivation, enhanced sensitivity coefficient definition, material selection, and structure form determination. And it has the advantages of simple structure, low cost, variable enhanced sensitivity coefficient, and good practicality etc. It ban be used to do macro-strain and high precision measuring, especially for the monitoring of the civil engineering superficial structure and concrete built-in strain.

Description

(1) Technical field [0001] The present invention relates to a sticking type optical fiber grating increase and decrease sensitive strain sensor for steel structure surface strain measurement and an embedded optical fiber grating increase and decrease sensitive strain sensor for concrete internal strain measurement, wherein the large strain intensified sensor is used for measuring Structure cracks and concentrated stress, etc., high-precision desensitization sensors are used for small strain measurements with high precision requirements. Specifically, it is a fiber grating increase and decrease sensitive strain sensor formed by optimizing the shape of the material structure. The invention also relates to the manufacturing process of this type of sensor. (2) Background technology [0002] Regarding the increase and decrease sensitivity of fiber grating strain sensors, experts and scholars at home and abroad have conducted various studies on how to increase the sensitivity coe...

Claims

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Application Information

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IPC IPC(8): G01B11/16G01D5/353G01L1/24
Inventor 周智张广玉盛培军张小政欧进萍
Owner HARBIN INST OF TECH
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