Development of an optic-based guided wave excitation technique

Hyun-Jun Park; Hoon Sohn; Il-Bum Kwon; Chung-Bang Yun

doi:10.1117/12.815830

8 April 2009 Development of an optic-based guided wave excitation technique

Hyun-Jun Park, Hoon Sohn, Il-Bum Kwon, Chung-Bang Yun

Proceedings Volume 7295, Health Monitoring of Structural and Biological Systems 2009; 72950Y (2009) https://doi.org/10.1117/12.815830
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

In recent years, nondestructive testing (NDT) has gained popularity for structural health monitoring and damage detection applications. Among the NDT methods, guided wave based NDT techniques have attracted the attention of many researchers due to their relatively long sensing range. These guided waves can be generated in a structure and sensed by a variety of techniques. The present study proposes a new scheme for PZT excitation and sensing based on laser and optoelectronic technologies, where power as well as data can be transmitted via laser. This paper mainly focuses on the excitation aspect. An arbitrary waveform is generated using a light source and transmitted to the PZT. A photodiode connected to the PZT then converts the light into an electrical signal and excites the PZT. The technique can be configured either for wired or wireless PZT excitations. Finally, the feasibility of the proposed power transmission scheme has been experimentally demonstrated in a laboratory setup.

Citation Download Citation

Hyun-Jun Park, Hoon Sohn, Il-Bum Kwon, and Chung-Bang Yun "Development of an optic-based guided wave excitation technique", Proc. SPIE 7295, Health Monitoring of Structural and Biological Systems 2009, 72950Y (8 April 2009); https://doi.org/10.1117/12.815830

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