中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
Vol. 25 No. 1 January 2015 |
(1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China;
2. Australian Centre for Geomechanics, The University of Western Australia, Perth 6009, Australia)
Abstract:To find analytical solutions of nonlinear systems for locating the acoustic emission/microseismic(AE/MS) source without knowing the wave velocity of structures, the sensor location coordinates were simplified as a cuboid monitoring network. Different locations of sensors on upper and lower surfaces were considered and used to establish nonlinear equations. Based on the proposed functions of time difference of arrivals, the analytical solutions were obtained using five sensors under three networks. The proposed analytical solutions were validated using authentic data of numerical tests and experiments. The results show that located results are consistent with authentic data, and the outstanding characteristics of the new solution are that the solved process is not influenced by the wave velocity knowledge and iterated algorithms.
Key words: acoustic emission; seismic source; sensor; location; analytical solution