Standard Article

Hybrid PZT/FBG Sensor System

Systems and System Design

Examples of Systems

  1. Zhanjun Wu1,
  2. Xinlin P. Qing2,
  3. Fu-Kuo Chang1

Published Online: 15 SEP 2009

DOI: 10.1002/9780470061626.shm101

Encyclopedia of Structural Health Monitoring

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. .

Author Information

  1. 1

    Stanford University, Department of Aeronautics and Astronautics, Stanford, CA, USA

  2. 2

    Acellent Technologies, Inc., Sunnyvale, CA, USA

Publication History

  1. Published Online: 15 SEP 2009

Abstract

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.

Keywords:

  • structural health monitoring;
  • hybrid system;
  • piezoelectric transducer;
  • fiber Bragg grating;
  • damage detection;
  • fiber-optic sensor