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http://dx.doi.org/10.9720/kseg.2015.1.103

Development of an Algorithm for P-wave Arrival Time determination Using Amoving Window Function  

Lee, Kyung-Soo (Geotechnical R&D Center, DASAN Engineering Co., Ltd.)
Cho, Seong-Ha (Geotechnical R&D Center, DASAN Engineering Co., Ltd.)
Lee, Chang-Soo (Department of Civil Engineering, The University of Seoul)
Choi, Young-Chul (Korea Atomic Energy Research Institute)
Yoo, Bo-Sun (Geotechnical R&D Center, DASAN Engineering Co., Ltd.)
Publication Information
The Journal of Engineering Geology / v.25, no.1, 2015 , pp. 103-113 More about this Journal
Abstract
This study presents a novel algorithm for determining the P-wave arrival time using amoving window function to improve source localization in low-SNR (signal-to-noise ratio)acoustic emissions. The proposed algorithm was applied to low-SNR signals to verify the accuracy of measurements against existing algorithms. When other algorithms were applied, the test results revealed that SNR decreased and accuracy was reduced, especially where SNR wasless than 2.14. The proposed algorithm using amoving window function considers the frequency characteristic and signal amplitude simultaneously, and produced reliable results where SNR was 2.14.
Keywords
acoustic emission; source localization; P-wave arrival time determination algorithm; moving window function; signal-to-noise ratio;
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