Laser ultrasonics for process control: issues for implementation

Michael J. Ehrlich; Todd W. Murray; James W. Wagner; Kevin C. Baldwin; James B. Spicer

doi:10.1117/12.259213

15 November 1996 Laser ultrasonics for process control: issues for implementation

Michael J. Ehrlich, Todd W. Murray, James W. Wagner, Kevin C. Baldwin, James B. Spicer

Proceedings Volume 2948, Nondestructive Evaluation for Process Control in Manufacturing; (1996) https://doi.org/10.1117/12.259213
Event: Nondestructive Evaluation Techniques for Aging Infrastructure and Manufacturing, 1996, Scottsdale, AZ, United States

Abstract

Laser ultrasonic techniques for in-process materials characterization show significant potential for applications where rapid, remote sensing is a requirement. While the potential is great, relatively few on-line industrial systems currently exist owing to difficulty associated with designing and implementing robust laser ultrasonic systems. Although laser-based ultrasound is becoming widely used as a laboratory tool for materials characterization, transitioning this technology into a robust industrial process control system poses several problems. Chief among these are suitable lasers for ultrasound generation, ultrasound detection, interferometer design, required signal processing, and overall system performance. This manuscript addresses each of these issues in turn, and gibes examples of industrial process control implementations where appropriate. Finally, recent advances in increasing laser based ultrasonic sensitivity are discussed.

Citation Download Citation

Michael J. Ehrlich, Todd W. Murray, James W. Wagner, Kevin C. Baldwin, and James B. Spicer "Laser ultrasonics for process control: issues for implementation", Proc. SPIE 2948, Nondestructive Evaluation for Process Control in Manufacturing, (15 November 1996); https://doi.org/10.1117/12.259213

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