【摘要】 设计与实现了一种基于CrossBow公司的无线传感器网络的声源定位系统,该系统摒弃了复杂的网络时间同步服务,采用了星型网络,划分为主控节点和普通节点,实现了轻量级的语音信号采集同步,减少了通讯流量,节省了电能.同时,主控节点担负着语音活动检测的功能,可以唤醒和休眠普通节点,进一步减少了不必要的能耗.与传统的基于麦克风阵列的有线声源定位系统相比,该系统具有较好的规模伸缩度以及易部署性,具有广阔的应用前景.更多还原

【Abstract】 Design and implement an acoustic source localization system based on wireless sensor network produced by CrossBow.This system gets rid of complicated network time synchronization service,instead,it uses star network,divides sensor nodes into primary control node and normal nodes,and realizes light weight acoustic acquiring time synchronization which cuts communication flow and saves electricity energy. At the same time, the primary sensor node is responsible for voice activity detection, it can make normal nodes asleep and wake them,further cuts unnecessary energy cost. Compared to wire microphone array acoustic source localization system, this system is flexible in scalability and is fairly facile to be employed, and has a broad application future.更多还原