High-speed high-resolution fiber Bragg grating matrix structural health monitoring system

Kelvin Chau; Pizhong Qiao; Wayhu Lestari; Richard J. Black; Behzad Moslehi

doi:10.1117/12.720406

10 April 2007 High-speed high-resolution fiber Bragg grating matrix structural health monitoring system

Kelvin Chau, Pizhong Qiao, Wayhu Lestari, Richard J. Black, Behzad Moslehi

Proceedings Volume 6530, Sensor Systems and Networks: Phenomena, Technology, and Applications for NDE and Health Monitoring 2007; 65301Q (2007) https://doi.org/10.1117/12.720406
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

Structural Health Monitoring (SHM) is becoming an increasingly important tool for the maintenance, safety and integrity of aerospace structural systems. Immune to electromagnetic interference, Fiber Bragg Grating (FBG) optical sensor matrices are light-weight and multiplexable, allowing many sensors on a single fiber to be integrated into smart structures. Highly sensitive to minute strains, they can facilitate maximum SHM functionality, with minimum weight and size. Consequently, these optical systems, in conjunction with advanced damage characterization algorithms, are expected to play an increasing role in extending the life and reducing costs of new generations of structures and airframes. In this paper, we discuss the development of both hardware and algorithms to detect, locate and quantify delamination in composite laminated beam structures. We present an integrated SHM system including (a) the capability of interrogating over 50 FBG sensors simultaneously with sub-picometer resolution at over 50 kHz, (b) an FBG-sensor/piezo-actuator matrix smart skin design and methodology, and (c) damage detection location and quantification algorithms based on mode shape or other relevant advanced algorithmic-based damage diagnosis and prognosis techniques. Comparison with other SHM systems (e.g., based on piezo-electric (PVDF) and Scanning Laser Vibrometer sensors) demonstrates better signal-to-noise and damage detection for our FBG system.

Citation Download Citation

Kelvin Chau, Pizhong Qiao, Wayhu Lestari, Richard J. Black, and Behzad Moslehi "High-speed high-resolution fiber Bragg grating matrix structural health monitoring system", Proc. SPIE 6530, Sensor Systems and Networks: Phenomena, Technology, and Applications for NDE and Health Monitoring 2007, 65301Q (10 April 2007); https://doi.org/10.1117/12.720406

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