声传感基阵与数据融合的声源定位系统研究

针对实际应用环境中存在的噪声和反射对声源定位精度的影响,探讨一种基于五元平面阵声传感声源定位的三基阵系统的实现方法,利用声信号到达不同位置各传声器的时延差及各基阵几何位置参数关系进行定位.采用几何数学方法分析声源定位的基础,利用FPGA完成声信号的高速采集和预处理.实验证明,在具有一定环境噪声和反射条件下,系统能对声源的距离、方位进行有效定位,实验数据稳定可靠.

Research of Sound Source Localization System Based on Acoustic Sensor Array and Data Fusion

Considering the impact of noise and reflection in the application environment to localization accuracy,a three-array localization system based on five-element square array is proposed in this paper, which uses time delay difference to each microphone and correlation geometrical parameters relationship between arrays for localization. The space coordinates model constructed by acoustic source and planar array is researched, the basis of multi-array acoustic source localization using geometry is analyzed, high-speed data acquisition and preprocessing of acoustic signal is completed by FPGA, and the localization result of each array is fused in upper computer. The experiment results indicate that acoustic source distance, azimuth angel and pitching angel can be located effectively under the condition of environmental noise and reflection, and the location data is stable and reliable through the LCD display and the PC data real-time tracking.