Research On QPSO-based Shallow Source Location Algorithm

Source positioning in underground shallow spaces is a hot subject in the field of underground space positioning.In the scope of underground monitoring,wireless sensor network is constructed by arranging sensor array,which can sense,monitor,collect,transmit,process and analyze the vibration signals collected by each sensor node.The precise source positioning is realized by characteristic parameter extraction,positioning model construction and positioning equation calculation.Due to the complexity of subsurface shallow media and serious waveform aliasing,the source positioning is uncertainTo address the above problems,the focus of this study is on a positioning method of underground shallow source based on QPSO scanning.Firstly,as a vibration wave propagation direction has good polarization,the P-wave polarization angle information is introduced into the positioning equation.A multi-parameter source location model containing polarization angle information and travel time information is established in this way Secondly,the QPSO algorithm is improved by introducing chaos search algorithm to improve the ergodicity of the initial particles;on the basis of reducing the premature phenomenon,the searching range of particles is improved by using the method of dual population.Thirdly,Taking the positioning equation as the target function,the improved QPSO algorithm is used to solve the source positioning model over a large-scale and in a fast scanning mode.In the process of searching,the particle with the smallest fitness value is regarded as the optimal particle of the present age,which is updated through continuous searching,and the global optimal particle finally obtained is regarded as the energy focus coordinate.Finally,the feasibility of the method is verified by simulation and field testThe experimental results show that positioning method proposed in this paper can effectively improve the speed and accuracy of source location,and has certain engineering application value in the field of shallow space source location.