First p-wave signal with noise to the kurtosis based dwt_sta / lta pickup method

The present invention discloses a noisy signal based on the beginning of the P wave DWT_STA / LTA to kurtosis pickup method, comprising the steps of: extracting mine microseismic signal; discrete wavelet transform (DWT) obtained microseismic detail signal; calculating respective detail signal STA / LTA value; determining STA / LTA is greater than the maximum threshold value a, the time taken if the first trigger point for the number of sampling points corresponding substantially to the detail signal, otherwise referred to when the detail signal is 0; again to the detail signal is non-zero local kurtosis pickup; Finally weight analysis determined that the P-wave to the final. The method effectively excludes low signal to noise ratio, spike, tail shock pure noise signal and an interference greatly reduces the error rate of pick-up, to enhance the accuracy of the P-wave picked up.