一种改进的声发射P波到时自动提取算法

An Improved Automatic Algorithm of Acoustic Emission P-Wave Arrival Time Picking

岩石破裂过程中的声发射(AE)监测技术已广泛应用于岩石工程领域,声发射信号的到时提取是深入开展岩石力学声发射研究的基础和关键.为了获取更为准确的声发射信号P波到时,在前人研究的基础上,提出了一种改进的Pphase-Picker声发射P波到时自动提取算法并对其原理进行详细描述.选取1 000个典型声发射波形,对比分析了几种到时自动提取算法的计算结果,表明改进的算法不仅可以获取更为精确的P波到时,还可以获取到时提取误差的估计值.

Acoustic emission(AE)monitoring technique has been widely applied in the area of geotechnical engineering.Automated arrival time picking of P-wave is the fundament and key in the further rock mechanical AE study.In order to get the more accurate arrival time of AE single,an improved Pphase-Picker P-wave arrival time picking algorithm was proposed and its principle was described in detail.Several automatic arrival time picking algorithm were compared in 1 000 typical AE wave,the result indicated that the improved algorithm can not only get a more accurate P-wave arrival time rapidly,but also can get an error estimation of P-wave arrival time.