论文部分内容阅读
提出一种直线型超声阵列信号测向方法。首先,利用FastICA算法对超声阵列信号进行去噪;然后,采用双边相关变换(two-sided correlation transformation,TCT)算法对其进行聚焦处理,实现宽带信号方位信息的累积;接着采用FastDOA对聚焦后的窄带信号进行波达方向估计。在此基础之上,研究该测向方法在电气设备局放检测中的应用,先在不同信噪比下仿真直线型局放超声阵列信号的测向精度,结果显示误差约为2o;通过多次实验,表明该方法的实际测向误差约为3.5o,证明了该方法的正确性。
A linear ultrasonic array signal direction finding method is proposed. Firstly, the FastICA algorithm is used to denoise the ultrasonic array signal. Then, the signal is processed by two-sided correlation transformation (TCT) to get the accumulated signal’s position information. Then, Narrowband signal direction of arrival estimation. Based on this, the application of this direction finding method in the PD detection of electrical equipment is studied. First, the accuracy of directional signal of linear PD array signals is simulated under different signal-to-noise ratios. The result shows that the error is about 2o. Experiments show that the actual error of the method is about 3.5o, which proves the correctness of the method.