全相位与Geiger算法的岩石声发射源定位方法

Geiger定位算法在岩石定位分析中得到广泛应用，但是对初始值要求非常严格，若初始值选择不当，则很难进入收敛范围。为了提高定位精度，减少迭代次数，针对这些问题，提出全相位与Geiger算法的岩石声发射源定位方法。首先进行花岗岩（50 mm×100 mm×50 mm）断铅实验，接着充分利用全相位FFT相位不变性的优势分析断铅信号，通过相位差法求出时延同时反演声发射源求出Geiger迭代初始值，最后综合最小二乘法与Geiger算法，迭代求出最优解。实验仿真结果显示此算法的平均误差相比美国PCI-2型声发射仪器定位结果降低了约5 mm，有效解决了Geiger初始值选取的问题，能够迅速进入收敛范围，提高了收敛速度和定位精度。

Rock Acoustic Emission Source Localization Method Based On All Phase and Geiger Algorithm

Geiger localization algorithm is widely used in the analysis of rock localization,however,it is very strict on the initial value,if the initial value is not properly selected,it is difficult to enter the convergence range. In order to improve the positioning precision and reduce the number of iterations,rock acoustic emission source localization method based on all phase and Geiger algorithm is put forward. First of all,the experiment was carried out on the granite(50 mm×100 mm×50 mm). Secondly,making full use of the advantage of apfft phase invariance to analyse the lead signal,and the delay time is obtained by the phase difference method,at the same time,the initial value of the Geiger iteration is obtained by the inversion of the acoustic emission source. In the end,combining least square method and Geiger algorithm to obtain optimum solution. Experimental simulation results are shown:Comparing the positioning results of the United States PCI-2 type acoustic emission instrument,the average error decreased by about 5 mm. This method can effectively solve the problem of selecting the initial value of Geiger,so that it can quickly enter the convergence range,improving the convergence speed and positioning accuracy.