The underground explosion point high precision measurement method based on multidimensional information fusion of vibration sensors

Purpose The purpose of this paper is to solve the problem that location initiation point cannot be measured accurately in shallow underground space, proposes a method, which based on fusion multidimensional vibration sensor information, locate single sources. Design/methodology/approach First, paper, using characteristics low multipath interference and good P-wave polarization near field, adaptive covariance matrix algorithm used extract angle information short term averaging/long averaging first break travel time information. Second, hybrid positioning model constructed. Third, taken as particle update fitness function quantum-behaved swarm optimization calculation performed model. Finally, experiment verification carried out field. Findings experimental results show that, with root mean square error, spherical error probable value evaluation indicators, performance method better than without speed prediction. And accuracy has been improved by nearly 30%, giving all three tests within 0.5 m less 1. Originality/value This provides new idea for high-precision source. It certain engineering application fields directional demolition blasting, water inrush burst mud prediction, fuze position measurement, ammunition, mine blasting monitoring so on.