基于非同步采集方式小型声源定位系统设计

摘要

利用非同步采集设备,通过广义互相关(GCC)时延估计算法,估算出通道间的相对时延;对非同步采集方式产生的时延误差进行软件补偿;利用基于到达时间差(TDOA)声源定位算法的双步定位特性,估算出声源的位置.分别设计了四元均匀线阵系统和四元平面十字阵列系统对以上方法进行验证,系统能够较准确地实现对声源方位的估计.%Use non-synchronous sampling equipment,by generalized cross correlation (GCC ) time delay estimation algorithm to estimate the relative delay between channels. Second,compensate delay time error generated by non-synchronous collection method by software. Third,the location of sound source is estimated by the two-step localization feature of time difference of arrival(TDOA) sound source location algorithm. Four element uniform linear array and planar four element cross array system are designed to verify the above methods,the results prove the method can more accurately realize the estimation of the sound source orientation.