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低空声源目标具有较强的隐身性,为了实现对此类目标的定位,构建基于TMS320C6713平台的分布式麦克风阵列低空声源定位系统。麦克风阵列节点以DSP为核心处理器,通过A/D芯片采样麦克风阵列接收到的信号,通过到达时间差(TDOA)计算声源的角度,利用测向交叉法,融合多个节点的角度信息,计算出声源的位置。结果表明:在时延估计精确的情况下,对低空目标具有较好地估计;系统具有较高的精度和稳定性,能够满足对低空声源目标进行定位的实际需求。
In order to locate such a target, a low-altitude sound source localization system based on TMS320C6713 platform is constructed. The microphone array node takes the DSP as the core processor, samples the signal received by the microphone array through the A / D chip, calculates the sound source angle through time difference of arrival (TDOA), combines the angle information of multiple nodes by the direction finding cross method, calculates Out of the source of the location. The results show that the proposed method has better estimation of low-altitude targets when the delay estimation is accurate. The system has high accuracy and stability and can meet the actual needs of low-altitude sound source targets.