An FBG-Based Impact Event Detection System for Structural Health Monitoring | Zendy

ChowShing Shin | Zendy; B. L. Chen | Zendy; ShienKuei Liaw | Zendy

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An FBG-Based Impact Event Detection System for Structural Health Monitoring

Author(s) -

ChowShing Shin,

B. L. Chen,

ShienKuei Liaw

Publication year - 2010

Publication title -

advances in civil engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.379

H-Index - 25

eISSN - 1687-8094

pISSN - 1687-8086

DOI - 10.1155/2010/253274

Subject(s) - demodulation , fiber bragg grating , structural health monitoring , computer science , acoustics , limiting , position (finance) , turbine , event (particle physics) , environmental science , optics , structural engineering , telecommunications , optical fiber , engineering , physics , aerospace engineering , mechanical engineering , quantum mechanics , channel (broadcasting) , finance , economics

Some structures are vulnerable to localized internal damages incurred by impact of small objects. An impact monitoring system using fiber Bragg grating (FBG) sensors has been established. Its ability to detect very low to medium energy impacts has been demonstrated on an aluminum plate and a 22 m long wind turbine blade. Previous analysis of this technique showed that the accuracy by which an impact position can be located is limited by equipment noises and angular insensitivity of the FBG. By employing two intensity demodulation schemes with different demodulation sensitivities and ranges, we try to differentiate the relative importance of the above limiting effects. Based on the results, directions for further improvement on impact source locating accuracy will be discussed and the implication of applying such systems on large-scale structures will be examined

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