Development and improvement of a fiber bragg grating deformation monitoring system

碩士 === 國立交通大學 === 土木工程學系 === 99 === Optic fiber Bragg grating sensors typically have the advantages that include: immune to electromagnetic interference or lightning, capable of cascading multiple sensors on a single optic fiber, and the optical signal can be transmitted over long distances. In civ...

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Main Authors: Huang, Hsin-Chung, 黃信忠
Other Authors: Huang, An-Bin
Format: Others
Language:zh-TW
Published: 2011
Online Access:http://ndltd.ncl.edu.tw/handle/39487202499944415157
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spelling ndltd-TW-099NCTU50150442015-10-13T20:37:26Z http://ndltd.ncl.edu.tw/handle/39487202499944415157 Development and improvement of a fiber bragg grating deformation monitoring system 光纖變形監測系統改進與研發 Huang, Hsin-Chung 黃信忠 碩士 國立交通大學 土木工程學系 99 Optic fiber Bragg grating sensors typically have the advantages that include: immune to electromagnetic interference or lightning, capable of cascading multiple sensors on a single optic fiber, and the optical signal can be transmitted over long distances. In civil engineering and disaster monitoring, these advantages are especially oimportant. The objective of this research has three facets that include: improve the fiber Bragg grating segmented deflector (FBG-SD), development of an FBG inclinometer probe (FBG-IP) and an FBG accelerometer. The FBG-SD measures the relative deflection angle between two neighboring tubular rigid segments. A string of multiple FBG-SD units may be connected together in any direction to monitor the deflection distribution of a target structure. The errors in relative angle measurements accumulate through the connected FBG-SD’s. The individual FBG-SD units are connected in the field as they are attached or installed in the target structure. This process is time consuming and tends to damage the FBG-SD. The first task in this research is to minimize the FBG-SD units, and allow them to be pre-assembled into an array in the laboratory. The arrangement makes shipping and field installation of the FBG-SD array significantly more efficient. The FBG-IP measures change of its inclination in reference to gravity. Multiple FBG-IP’s can be connected into a string and monitor the deformation distribution along the line (gravity or vertical direction) of measurement. The system design of FBG-IP is similar to the minimized FBG-SD, allowing an array of FBG-IP’s be pre-assembled in the laboratory, but the errors in inclination angle measurements do not accumulate as the FBG-SD. The FBG accelerometer is designed mainly to be used in a seismic cone penetrometer. The design fits the mechanical design of the cone and characteristics needed for seismic cone penetration tests. The thesis describes the details of these FBG sensors improvement/development, and part of their field applications. Huang, An-Bin 黃安斌 2011 學位論文 ; thesis 147 zh-TW
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language zh-TW
format Others
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description 碩士 === 國立交通大學 === 土木工程學系 === 99 === Optic fiber Bragg grating sensors typically have the advantages that include: immune to electromagnetic interference or lightning, capable of cascading multiple sensors on a single optic fiber, and the optical signal can be transmitted over long distances. In civil engineering and disaster monitoring, these advantages are especially oimportant. The objective of this research has three facets that include: improve the fiber Bragg grating segmented deflector (FBG-SD), development of an FBG inclinometer probe (FBG-IP) and an FBG accelerometer. The FBG-SD measures the relative deflection angle between two neighboring tubular rigid segments. A string of multiple FBG-SD units may be connected together in any direction to monitor the deflection distribution of a target structure. The errors in relative angle measurements accumulate through the connected FBG-SD’s. The individual FBG-SD units are connected in the field as they are attached or installed in the target structure. This process is time consuming and tends to damage the FBG-SD. The first task in this research is to minimize the FBG-SD units, and allow them to be pre-assembled into an array in the laboratory. The arrangement makes shipping and field installation of the FBG-SD array significantly more efficient. The FBG-IP measures change of its inclination in reference to gravity. Multiple FBG-IP’s can be connected into a string and monitor the deformation distribution along the line (gravity or vertical direction) of measurement. The system design of FBG-IP is similar to the minimized FBG-SD, allowing an array of FBG-IP’s be pre-assembled in the laboratory, but the errors in inclination angle measurements do not accumulate as the FBG-SD. The FBG accelerometer is designed mainly to be used in a seismic cone penetrometer. The design fits the mechanical design of the cone and characteristics needed for seismic cone penetration tests. The thesis describes the details of these FBG sensors improvement/development, and part of their field applications.
author2 Huang, An-Bin
author_facet Huang, An-Bin
Huang, Hsin-Chung
黃信忠
author Huang, Hsin-Chung
黃信忠
spellingShingle Huang, Hsin-Chung
黃信忠
Development and improvement of a fiber bragg grating deformation monitoring system
author_sort Huang, Hsin-Chung
title Development and improvement of a fiber bragg grating deformation monitoring system
title_short Development and improvement of a fiber bragg grating deformation monitoring system
title_full Development and improvement of a fiber bragg grating deformation monitoring system
title_fullStr Development and improvement of a fiber bragg grating deformation monitoring system
title_full_unstemmed Development and improvement of a fiber bragg grating deformation monitoring system
title_sort development and improvement of a fiber bragg grating deformation monitoring system
publishDate 2011
url http://ndltd.ncl.edu.tw/handle/39487202499944415157
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