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

Autor: C. S. Shin, B. L. Chen, S. K. Liaw
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Advances in Civil Engineering, Vol 2010 (2010)
Druh dokumentu: article
ISSN: 1687-8086
1687-8094
DOI: 10.1155/2010/253274
Popis: 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.
Databáze: Directory of Open Access Journals
Externí odkaz: