Hybrid PZT/FBG Sensor System
Systems and System Design
Examples of Systems
Published Online: 15 SEP 2009
Copyright © 2009 John Wiley & Sons, Ltd. All rights reserved.
Encyclopedia of Structural Health Monitoring
How to Cite
Wu, Z., Qing, X. P. and Chang, F.-K. 2009. Hybrid PZT/FBG Sensor System. Encyclopedia of Structural Health Monitoring. .
- Published Online: 15 SEP 2009
Piezoelectric transducers and fiber-optic sensors have been established as excellent sensors for monitoring structural health. To utilize the advantages of both piezoelectric transducer (PZT) and fiber-optic sensor, hybrid piezoelectric/fiber-optic structural health monitoring systems have been developed for quick nondestructive evaluation and long-term health monitoring of aerospace vehicles and civil structures. In this article, a general review of the state of art of the hybrid piezoelectric/fiber-optic sensing techniques is presented, which include the ultrasonic stress wave detectability study based on both experimental demonstration and theoretical analysis. An integrated hybrid active system and its application are also introduced. The hybrid active system uses PZT transducers as actuators to input diagnostic waveforms to the structure, and fiber Bragg grating (FBG) sensors to receive the response signals in a pitch-catch manner. Demonstrations of damage detection of the system in both metallic and composite structures with the proposed system are presented as well.
- structural health monitoring;
- hybrid system;
- piezoelectric transducer;
- fiber Bragg grating;
- damage detection;
- fiber-optic sensor