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Hydraulic sensing method based on gold-plated optical fiber sensing head

A technology of optical fiber sensing head and sensing method, which is applied in the direction of fluid pressure measurement using optical methods, can solve the problem of low sensitivity, and achieve the effects of simple manufacturing process, no electromagnetic interference, and high sensitivity

Inactive Publication Date: 2012-06-20
ZHEJIANG NORMAL UNIVERSITY
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  • Abstract
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Problems solved by technology

[0003] In the field of optical fiber hydraulic sensing technology, the fiber Bragg grating hydraulic sensing technology is currently relatively mature. Range (hundreds of MPa), but not very sensitive

Method used

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  • Hydraulic sensing method based on gold-plated optical fiber sensing head
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  • Hydraulic sensing method based on gold-plated optical fiber sensing head

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Embodiment Construction

[0018] Such as figure 1 and figure 2 As shown, the hydraulic sensing device based on the gold-plated optical fiber sensing head includes a broadband light source 1 , a three-port optical coupler 2 , a spectrum analyzer 3 and a gold-plated optical fiber sensing head 4 .

[0019] The output port of broadband light source 1 is connected with the first port optical fiber of three-port optical coupler 2; The second port of this three-port optical coupler 2 is connected with the input port optical fiber of spectrum analyzer 3; The three-port The third port of the optical coupler 2 is connected with the gold-plated optical fiber sensing head 4 by optical fiber. The gold-plated optical fiber sensing head 4 is composed of a single-mode optical fiber 5 with an unlimited length, a single-mode optical fiber 6 with a length L (5-50 mm) and a gold-plated film 7 . A section of single-mode fiber 5 with an unlimited length and another section of single-mode fiber 6 with a length of L (5-50 ...

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Abstract

The invention discloses a hydraulic sensing method based on a gold-plated optical fiber sensing head. The current methods have low sensitivity. The method comprises the following steps: firstly, determining a broadband light source, a three-port optical coupler, a spectrum analyzer and a gold-plated optical fiber sensing head; secondly, connecting the components according to a measurement scheme;and finally, putting the gold-plated optical fiber sensing head in a liquid environment of which the hydraulic pressure needs to be measured, and measuring the drift of the wavelength corresponding to the interference peak by the spectrum analyzer, thus computing the hydraulic pressure. The method has the following advantages of invulnerability to electromagnetic interference, low price, compact structure, simple manufacturing process, high sensitivity, suitability for medical application and the like.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing and relates to a hydraulic sensing method based on a gold-plated optical fiber sensing head. Background technique [0002] The emergence of optical fiber has brought about the revolutionary development of human communication and information technology. In the field of sensing, optical fiber can be used as a sensing unit to realize the sensing of external physical quantities through the characteristics of light propagating in it. The optical fiber sensing technology based on this has been widely valued. Optical fiber sensing technology has important application potential in the fields of biology, medicine, aerospace, aviation, machinery, petrochemical, construction, high-speed rail, bridges, and national defense industries. [0003] In the field of optical fiber hydraulic sensing technology, the fiber Bragg grating hydraulic sensing technology is currently relatively mature. Range (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L11/02
Inventor 陈达如胡顾锋吴根柱彭保进
Owner ZHEJIANG NORMAL UNIVERSITY
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