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Proceedings Paper

Design of a wireless active sensing unit for structural health monitoring
Author(s): Jerome Peter Lynch; Arvind Sundararajan; Kincho H. Law; Hoon Sohn; Charles R. Farrar
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Paper Abstract

Many academic and commercial researchers are exploring the design and deployment of wireless sensors that can be used for structural monitoring. The concept of intelligent wireless sensors can be further extended to include actuation capabilities. In this study, the design of a wireless sensing unit that has the capability to command active sensors and actuators is proposed for structural monitoring applications. Active sensors are sensors that can input excitations into a structural system and simultaneously monitor the corresponding system's response. The computational core of the wireless active sensing unit is capable of interrogating response data in real time and can be used to execute embedded damage detection analyses. With high-order vibration modes of structural elements exhibiting greater sensitivity to damage than global structural modes, wireless active sensors can play a major role in a structural health monitoring system because they are capable of exciting high-order modes. A computational framework for analyzing piezoelectric based active sensor signals for indications of structural damage is proposed. For illustration, a simple aluminum plate with piezoelectric active sensors mounted to its surface is used.

Paper Details

Date Published: 21 July 2004
PDF: 12 pages
Proc. SPIE 5394, Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems III, (21 July 2004); doi: 10.1117/12.545572
Show Author Affiliations
Jerome Peter Lynch, Univ. of Michigan (United States)
Arvind Sundararajan, Stanford Univ. (United States)
Kincho H. Law, Stanford Univ. (United States)
Hoon Sohn, Los Alamos National Lab. (United States)
Charles R. Farrar, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 5394:
Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems III
Tribikram Kundu, Editor(s)

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