Node Design Of Fast Deployment Distributed Source Positioning System

Sound source localization technology is a technology that uses acoustic sensor array to collect information of sound source,and uses acoustic source localization algorithm to get the location of sound source.The research on sound source localization technology is in the late nineteenth Century and early twentieth Century,but the sound source positioning technology is ignored,because of the rapid development of some investigation techniques,such as laser,radar and infrared.Recent years,due to the development of anti-reconnaissance technologies such as laser,radar and infrared,and with the development of digital signal processing technology,the sound source localization technology once again become the focus of attention.The nodes of the distributed sound source localization system are designed through researching the sound source localization technology and combined with the construction project of "Unmanned Alert System" of China Ordnance Industry Testing and Testing Institute in this paper.The overall scheme design of the nodes is completed through the study of related technologies and the analysis of the functional requirements of the nodes.In view of the limitations of the traditional sound source localization system in practical engineering projects,this paper designs a rapidly deployed distributed sound source localization system node.The node mainly includes two parts: Detection of node's position and attitude information and Localization of acoustic source targets.The nodes can achieve relatively rapid deployment by detecting the node's pose information,the detection of the position and posture information of the node includes node location detection and gesture information detection.The location of the node to the target of the sound source is the main content in the paper,the first step is to obtain the information of the sound source by the node,the second step is to locate the target of the sound by using the sound source positioning algorithm.According to the overall design of the node,a hardware platform based on ARM processor chip STM32F407VET6 is built.Using the GPS module and the attitude sensor module MPU-9250 to detect the position and posture information of the nodes,the multi-channel synchronous acquisition of the source information of the node is realized by using the MEMS sound sensor MP45DT02 and the audio processing module based on the STA321,and the localization of the node to the target of the sound source has been completed by using the sound source localization algorithm.Finally,the function test of the node is carried out through the experiment,include the detection experiment of position,posture information of nodes and the localization experiment of sound source target,the experimental results show that the rapid deployment of distributed source localization system nodes can achieve the desired goal.