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基于小波包详细分析信号到时点前后的频带能量特征,得出准确到时点后的频带能量特征与原始信号的频带能量特征基本一致,吻合度最高,提出了一种拾取到时点准确性的检验方法,对信噪比低的微震信号到时拾取更加适用,大大提高了信号到时拾取的精度和效率。
Based on the detailed analysis of the energy characteristics of the band before and after the signal arrives at the time point based on the wavelet packet, it is concluded that the energy characteristics of the band after the exact arrival time are basically the same as the band energy characteristics of the original signal, and the coincidence degree is the highest. Of the test method, the signal to noise ratio of the microseismic signal pick-up time is more applicable, greatly improving the accuracy of the signal when the pick-up and efficiency.