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Encapsulation method for optical fibre grating add-and-subtract quick strain sensor

A technology of strain sensor and optical fiber grating, which is applied in the field of sensing, can solve problems such as large difference between the sensitization coefficient and the theoretical value, a single way of increasing or decreasing sensitization, and difficult engineering applications, so as to avoid uneven bonding, simple structure, and eliminate effect of influence

Active Publication Date: 2008-03-12
DALIAN UNIV OF TECH
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Problems solved by technology

However, the structure of the existing sensitization technology is relatively complicated, the method of increasing and decreasing the sensitivity is single, and the actual sensitization coefficient is quite different from the theoretical value, so it is difficult to realize engineering application.

Method used

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  • Encapsulation method for optical fibre grating add-and-subtract quick strain sensor
  • Encapsulation method for optical fibre grating add-and-subtract quick strain sensor
  • Encapsulation method for optical fibre grating add-and-subtract quick strain sensor

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Embodiment Construction

[0023] The best embodiment of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

[0024] The schematic diagrams of the packaging structure of the fiber grating increase and decrease sensitive strain sensor proposed by the present invention are shown in accompanying drawings 1 and 2 . The specific method of packaging is to first peel off the coating layer on the surface of the optical fiber 1 at one end of the fiber grating 4, place the optical fiber 1 in the packaging component 2, and adjust its position with a precision optical fiber adjustment frame so that the stripped area of ​​the optical fiber 1 is in the center , and then pour the adhesive to bond the optical fiber 1 in the packaging part 2. After the adhesive is cured, treat the optical fiber 1 and the packaging part 2 at the other end in the same way; then insert the two clamping parts 3 into the two ends of the fiber grating In the packaging par...

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Abstract

The invention provides a packaging method for a fiber grating sensitivity-increasing / decreasing strain sensor, belonging to the sensing technology field, which comprises a sensitivity-increasing / decreasing theory for the fiber grating strain sensor, a formula for sensitivity-increasing / decreasing coefficients, a sensor structure and a packaging method. The packaging method for a fiber grating strain sensor not only effectively protects the bare fiber grating, but also can change the strain sensitivity of the fiber grating; the sensitivity-increasing / decreasing coefficients can be customized according to the dimensions of the packaging materials in order to meet the requirements of different measurement. The invention has the advantages of that the fiber grating strain sensor based on the packaging method provides the monitoring means of large strain range and high measurement accuracy for the surface and internal strain measurement of large engineering structures.

Description

technical field [0001] The invention belongs to the field of sensing technology, and relates to a packaging method of a fiber grating increase and decrease sensitive strain sensor. Background technique [0002] Fiber Bragg Grating is a new generation of optical passive devices that has developed most rapidly in recent years, and it plays an increasingly important role in related fields such as optical fiber communication and optical fiber sensing. The strain sensor developed with fiber grating as the sensing element has advantages such as high sensitivity, small size, corrosion resistance, and anti-electromagnetic radiation; it overcomes the traditional electrical sensors that are susceptible to electromagnetic radiation interference, low precision, poor long-term stability, and signal transmission. The disadvantage of short distance; it can meet the measurement needs in harsh working environments such as civil engineering, aerospace, and petroleum industry. Multiple fiber ...

Claims

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Application Information

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IPC IPC(8): G01B11/16G01D5/353G01D5/38G02B6/34
Inventor 任亮李宏男
Owner DALIAN UNIV OF TECH
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