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为了解决岩石声发射源定位中,迭代法初始值的选取对定位精度和收敛速度的影响问题,提出了一种基于多次互相关的Geiger优化迭代的组合算法,充分利用互相关法可以提高信号信噪比和改善信号质量的优势,有效解决了声发射源定位初始迭代值的选取问题和传统互相关容易出现无解的问题,花岗岩断铅试验仿真结果表明:基于多次互相关与Geiger的组合算法定位结果的平均绝对误差比单独使用多次互相关降低了2.935 mm,比机器定位结果的平均绝对误差降低了1.834mm。
In order to solve the problem that the initial value of iterative method affects the positioning accuracy and convergence speed in rock acoustic emission source localization, a combination algorithm based on multiple cross-correlation Geiger optimization iteration is proposed. Taking full advantage of the cross-correlation method, the signal can be enhanced Signal-to-noise ratio and signal quality improvement, effectively solve the problem of initial iteration value selection of acoustic emission source positioning and traditional cross-correlation prone to no solution problem. Simulation results of broken lead test in granite show that based on multiple cross-correlation and Geiger The average absolute error of the combined algorithm positioning results was 2.935 mm lower than the cross-correlation alone, which was 1.834 mm lower than the average absolute error of the machine positioning results.