Laser based structural health monitoring for civil, mechanical, and aerospace systems

Hoon Sohn

doi:10.1117/12.921722

9 April 2012 Laser based structural health monitoring for civil, mechanical, and aerospace systems

Hoon Sohn

Author Affiliations +

Proceedings Volume 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012; 834502 (2012) https://doi.org/10.1117/12.921722
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

This paper provides an overview of ongoing laser ultrasonics based structural health monitoring (SHM) activities being performed by the author. Particular focus is given to (1) the development of a fully noncontact laser ultrasonic system that can easily visualize defects with high spatial resolution, (2) laser based wireless power and data transmission schemes for remote guided waves and impedance measurements, (3) minimization of false alarms due to varying operational and environmental conditions, and (4) extension to embedded laser ultrasonic excitation and sensing. SHM examples ranging from bridges to airplanes, as well as nuclear power plants, high-speed rails and wind turbines are also presented.

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Hoon Sohn "Laser based structural health monitoring for civil, mechanical, and aerospace systems", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 834502 (9 April 2012); https://doi.org/10.1117/12.921722

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KEYWORDS

Ultrasonics

Ferroelectric materials

Pulsed laser operation

Sensors

Structural health monitoring

Transducers

Laser systems engineering

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