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Reference-Free Transducer Self-Diagnosis Scheme Development

[+] Author Affiliations
Sang Jun Lee, Hoon Sohn

Carnegie Mellon University

Paper No. IMECE2006-14387, pp. 675-684; 10 pages
doi:10.1115/IMECE2006-14387
From:
  • ASME 2006 International Mechanical Engineering Congress and Exposition
  • Materials, Nondestructive Evaluation, and Pressure Vessels and Piping
  • Chicago, Illinois, USA, November 5 – 10, 2006
  • Conference Sponsors: Materials Division, Nondestructive Evaluation Division, and Pressure Vessels and Piping Division
  • ISBN: 0-7918-4773-X | eISBN: 0-7918-3790-4
  • Copyright © 2006 by ASME

abstract

A self-sensing scheme, which allows using Lead Zirconate Titanate (PZT) materials for simultaneous sensing and actuation, has been developed in the context of structural health monitoring (SHM). Based on the self-sensing scheme developed, a time response of the PZT transducer coupled with a mechanical response of the host structure is successfully extracted while the same PZT transducer is excited by a specific input signal. Then, the measured PZT response is used for detecting transducer defects such as PZT cracking and debonding. In order to improve the reliability of transducer diagnosis, the reference-free transducer self-diagnosis scheme based on the developed self-sensing scheme is proposed. Finally, the effectiveness of the proposed self-diagnosis scheme is examined using PZT wafers instrumented on a fixed-free aluminum beam.

Copyright © 2006 by ASME

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