摘要
通过对传声器阵列合成孔径算法进行研究,提出了一种适用于变电站低频噪声定位的测量方法。根据变电站电气设备主要声源为稳态噪声的特点,通过传声器阵列在不同空间位置对电气设备噪声信号进行采集,利用合成孔径原理进行数据处理,将不同空间位置信号拟合成虚拟的大孔径阵列,在不改变阵列物理尺寸的同时,大幅度增加了接收面内的信息量。通过在750 kV变电站的实际应用,证明了合成孔径方法的可行性,与传统波束形成算法相比,合成孔径法能够降低低频噪声旁瓣干扰,提高定位精度和分辨率。
By studying microphone array synthetic aperture algorithm, the paper proposes a novel method for measuring and locating substation low-frequency noise. Since the main noise source of electrical devices in substation is steady, the noise of electrical devices in different positions is measured by the microphone array. Using synthetic aperture algorithm, virtual array with larger aperture is built by processing the signals of different positions. Information collected is greatly enriched while the size of the array remains unchanged. Finally, the feasibility of the method is verified by the application in 750 kV substation. Compared with the traditional beam-forming algorithm, the method can reduce the low frequency sidelobe disturbances and improve the positioning accuracy as well as resolution.
出处
《陕西电力》
2017年第1期86-89,共4页
Shanxi Electric Power
关键词
传声器阵列
合成孔径
波束形成
噪声提取
声成像
microphone array
synthetic aperture
beam-forming
noise extracting
acoustic imaging
