【摘要】 为了对低速移动的声源目标进行较高实时性的方向跟踪,把四元声传感器面阵分为两个二元线阵,分别对目标进行测向,然后融合两组测量结果,给出了目标方位角的计算公式。根据线阵在被跟踪目标方位角不同时测向精度的不同,用加权因子增加较高精度的线阵测量结果的影响,降低误差较大的线阵测量结果的影响。该算法可对传感器阵列所在平面内任意方位的声源快速进行测向,完成一次测向只需对两对时间采样序列分别进行互相关运算,并可获得较高的定向精度,通过实验验证了该算法的精度和有效性。更多还原

【Abstract】 To track acoustic sound source on real time,a fast direction finding algorithm for four-acoustic sensor square planar array was proposed.The four-acoustic sensor square planar array was divided into two dualistic linear arrays and both of the dualistic linear arrays were used to approximately measure the direction of the sound source respectively.Then the measurement results of the both linear arrays were integrated and an expressions was proposed to calculate the azimuth angle of the sound source.According to the varying direction finding precision of the dualistic linear arrays with varying azimuth angle of the sound source,weighting factors were introduced to increase the influence of the measurement result with higher precision and to decrease the influence of the measurement result with lower precision in the proposed expressions.The algorithm is capable of finding the arbitrary azimuth angle of the sound source in the plane where the sensor array is with high accuracy.To complete one measurement requires only calculating the cross-correlation functions of two pairs of time sequence respectively.An experiment was also executed to verify the measurement precision of the algorithm.更多还原