基于单片机C8051F020的声源定位系统

Sound Localization System Based on SCM C8051F020

为了能精确判断声源的位置,设计了一种4路高精度拾音,单片机C8051F020控制的声源定位系统。该系统采用基于到达时差的方法来确定移动声源的位置。先获得声音信号到达拾音器对的时间差,根据到达时间差和拾音器的位置获得移动声源的位置,液晶显示屏LCD12864模拟坐标系显示移动声响模块的位置和坐标,第四路接收电路的信号用于对所测数据校验。经测试,该系统能精确定位移动声源,并准确显示其移动轨迹。

In order to accurately judge the location of sound source,this paper designs a sound localization system which con sists of four high accuracy sound pickup devices and SCM control system.The system uses a method of time difference of arrival to locate the moving sound source position.Firstly,the time difference of sound signals arriving at two pickup de vices is obtained,and then the moving sound source position is gotten according to the TDOA （time difference of arrival） and the pickup devices positions.The liquid crystal display LCD12864 simulates coordinated system to display the position and coord of the moving sound module,the signal of the fourth receiving circuit is used for checking the data tested.