| [Study of an optical fiber grating sensor for monitoring corrosion of reinforcing steel]. | |
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MedLine Citation:
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PMID: 20302133 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Based on the principle of the fiber Bragg grating strain sensor as well as the volume expansion of the reinforcing steel due to corrosion, an optical fiber grating sensor for monitoring corrosion of reinforcing steel and the method of temperature compensation were studied in the present paper. The sensor construction is that one Bragg grating is stuck on the inner center of two bars against each other, and the reinforcement volume as well as the diameter will expand due to corrosion. Based upon sensing mechanism, monitoring will be carried out by transforming the diameter increase to the fiber strain, and as a result the degree and rate of reinforcement corrosion can be obtained. The principle of corrosion monitoring is that the strain induced by corrosion and temperature fluctuation is measured by a reinforcing steel fiber grating sensor. At the same time, the strain induced by temperature fluctuation is also measured by an individual stainless fiber grating sensor. Therefore by two independent fiber grating sensors, the volume changed by corrosion can be separated. By the concrete encapsulating and embedding method of FBG corrosion sensor, the degree of corrosion of reinforcing reinforcement will be measured directly, which is not affected by corrosion factors and can be used in the early corrosion monitoring of reinforcement in concrete structures. Finally the relationship between corrosion rate and shift in center wavelength was calibrated by experiment. |
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Authors:
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Jun Li; Jin Wu; Jun-qi Gao |
Publication Detail:
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Type: English Abstract; Journal Article |
Journal Detail:
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Title: Guang pu xue yu guang pu fen xi = Guang pu Volume: 30 ISSN: 1000-0593 ISO Abbreviation: Guang Pu Xue Yu Guang Pu Fen Xi Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2010-03-22 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9424805 Medline TA: Guang Pu Xue Yu Guang Pu Fen Xi Country: China |
Other Details:
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Languages: chi Pagination: 283-6 Citation Subset: - |
Affiliation:
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Civil Engineering Department of Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China. lij_nh@nuaa.edu.cn |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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