Research on the influence law and mechanisms of sensors network layouts for the source location

LI Nan; WANG Enyuan; LI Baolin; WANG Xiaoran; CHEN Dong

Abstract：Two different sensors network layouts of source location laboratory experiments were designed and carried out.The source location error distribution law of the different sensors network layouts was analyzed,the non-uniformity characteristic of hyperbolic field was studied,and the mechanisms of the sensors network layouts for the source location were revealed.The results show that sensors network layouts affect both the source location accuracy and the source location solving system,and the influence of the sensors network layouts on source location results are non-uniformity.The accuracy and stability of the source locations depend on where the sources are in the sensors network layouts.Both the source location accuracy and stability inside of the network are higher than outside of the network.The accuracy and stability of the source locations consistently reduce along with the source away from the network center,and the down trend increases significantly when the sources move away from the edge of the network layouts.Based on the arrival-time-difference source location theory,the non-uniformity characteristic of hyperbolic field is revealed.The sensors network layouts affect the source location results by transferring the velocity and arrival time errors that already exist.More importantly,these errors transfer effect caused by the non-uniformity characteristic of hyperbolic field also has non-uniformity and amplification characteristics.This non-uniformity and amplification characteristics are the most important reason why the source location accuracy and stabilitydepend on the relative position of the sources and sensors network layouts.