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[1]ZHONG Yuan,HU Xingxing,TENG Yuntian,et al.The Applicability Analysis of STA/LTA Algorithm for MEMS Seismic Intensity Instruments[J].Journal of Seismological Research,2021,44(02):208-215.

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The Applicability Analysis of STA/LTA Algorithm for MEMS Seismic Intensity Instruments

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 44 Number of periods: 2021 02 Page number: 208-215 Column: Public date: 2021-06-30

Title:: The Applicability Analysis of STA/LTA Algorithm for MEMS Seismic Intensity Instruments

Author(s):: ZHONG Yuan; HU Xingxing; TENG Yuntian; CHEN Bo; HE Zhaobo; SHEN Xiaoyu; (Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)

Keywords:: MEMS seismic intensity instruments; STA/LTA; picking; computing-time

CLC:: P315.61

DOI:: -

Abstract:: Though a number of forecasting techniques are used for the detection of seismic events,each of them has its own pros and cons.Since the MEMS seismic intensity instrument which features low cost and follows the principle of high-density deployment has limitation in integrating software and hardware resources,it is difficult to embed some more complex algorithms.Based on the simulation calculation of Matlab,this paper aims to select the parameters that can improve algorithmic sensitivity,picking-effect of seismic events and calculation efficiency according to different factors of STA/LTA algorithm including variation tendency of the STA/LTA value,picking-effect and computing-time in various situations such as different characteristic functions,different window lengths and different short-window locations.And the improvement of STA/LTA algorithm is applied to practical seismic-data processing.The final analysis suggests that diverse characteristic functions have corresponding effects on facets like event picking-rate,picking-time deviation and computing-time of algorithms; the greater difference between the lengths of long-time windows and short-time ones,the more obviously the values of STA/LTA tend to change; the computing-time of algorithm depends on the length of the window(positive correlation); putting short windows after long ones can intensify variation range of STA/LTA values,reduce calculation amount and improve the picking time.In conclusion,the improved STA/LTA algorithm can improve the picking-effect,calculation efficiency and use less memory resources,so it is more suitable for MEMS intensity instruments with limited integrated resources.

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Last Update: 2021-06-30