Determination of P – wave arrival time of acoustic events

Acta Montanistica Slovaca

关键词: Onset detection;    Automatic picker;    Acoustic emission;    Loading experiments;    STA/LTA;   

DOI  :  

来源: DOAJ

【 摘 要 】

The new approach to the P-wave arrival time determination based on acoustic emission data from loading experiments is tested.The algorithm used in this paper is built on the STA/LTA function computed by a convolution that speeds up the computation processvery much. The picking process makes use of shifting of temporary onset until certain conditions are fulfill and as a main decisioncriterion on the threshold exceeding of the STA/LTA derivation function is used. The P-wave onset time is determined in a selectedinterval that corresponds to the theoretical propagation of elastic wave in the rock sample. Results obtained by our algorithm werecorrelated with data acquired manually and a high order statistic software as well.

【 授权许可】

Unknown