earticle

영어

In seismic signal detection, it is important to detect seismic wave and P-S wave arrival time. Seismometers or accelerometers which are used as seismic wave measurement system have some limits to detect seismic signal. In order to overcome these limits, we propose the seismic wave measurement device based on a heterodyne laser interferometer. Heterodyne laser interferometer is used as the distance measurement device which has measurable range from nanometer to several meters. Therefore we model seismic wave detection system based on heterodyne laser interferometer to measure P-S time for epicenter. Finally, we use STA/LTA algorithm to detect P-S time accurately. It is shown that heterodyne laser interferometer can be used as seismic detection device.