A low-power system design for Lamb wave methods

Shaver Deyerle; Dong Sam Ha; Daniel J. Inman

doi:10.1117/12.847677

8 April 2010 A low-power system design for Lamb wave methods

Shaver Deyerle, Dong Sam Ha, Daniel J. Inman

Proceedings Volume 7650, Health Monitoring of Structural and Biological Systems 2010; 765019 (2010) https://doi.org/10.1117/12.847677
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

Abstract

The analog-to-digital converter (ADC) of a Lamb wave system samples a response signal and converts it into a digital signal for further processing in the digital domain. A typical ADC used for a Lamb wave system consumes a large amount of power. It also increases the complexity of the signal processing for the processor, which, in turn, increases the power consumption of the processor. Elimination of the ADC can therefore significantly reduce the overall power dissipation of a Lamb wave system. In this paper, we propose a method to eliminate the ADC of a Lamb wave system, in which the ADC is replaced by two comparators. Our method quantizes the sampled signal into three levels rather than 2ⁿ levels as with an n-bit ADC. The experimental results performed with our prototype indicate that the proposed method is effective at detecting simulated damage on aluminum plates.

Citation Download Citation

Shaver Deyerle, Dong Sam Ha, and Daniel J. Inman "A low-power system design for Lamb wave methods", Proc. SPIE 7650, Health Monitoring of Structural and Biological Systems 2010, 765019 (8 April 2010); https://doi.org/10.1117/12.847677

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