Laser-Interferometric Broadband Seismometer for Epicenter Location Estimation
Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Korea
Author to whom correspondence should be addressed.
Received: 30 August 2017 / Revised: 27 September 2017 / Accepted: 5 October 2017 / Published: 23 October 2017
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In this paper, we suggest a seismic signal measurement system that uses a laser interferometer. The heterodyne laser interferometer is used as a seismometer due to its high accuracy and robustness. Seismic data measured by the laser interferometer is used to analyze crucial earthquake characteristics. To measure P-S time more precisely, the short time Fourier transform and instantaneous frequency estimation methods are applied to the intensity signal (
) of the laser interferometer. To estimate the epicenter location, the range difference of arrival algorithm is applied with the P-S time result. The linear matrix equation of the epicenter localization can be derived using P-S time data obtained from more than three observatories. We prove the performance of the proposed algorithm through simulation and experimental results.
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MDPI and ACS Style
Lee, K.; Kwon, H.; You, K. Laser-Interferometric Broadband Seismometer for Epicenter Location Estimation. Sensors 2017, 17, 2423.
Lee K, Kwon H, You K. Laser-Interferometric Broadband Seismometer for Epicenter Location Estimation. Sensors. 2017; 17(10):2423.
Lee, Kyunghyun; Kwon, Hyungkwan; You, Kwanho. 2017. "Laser-Interferometric Broadband Seismometer for Epicenter Location Estimation." Sensors 17, no. 10: 2423.
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