Single microphone positioning based on Angular scanning of acoustic Bessel beam from symmetric ultrasound emission
Single microphone positioning based on Angular scanning of acoustic Bessel beam from symmetric ultrasound emission
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DOI：
10.1016/j.measen.2021.100247
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发表时间：
2021-12
期刊：
影响因子：
--
通讯作者：
K. Hasegawa
中科院分区：
文献类型：
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作者：
K. Hasegawa
我们提出了一种三维自定位的方法，位于声场中的单个麦克风包含转向贝塞尔波束由二维平面超声相控阵产生。所提出的方法是以前提出的一个遭受相当大的定位误差的修改版本。在本文中，我们报告说，这个错误是由于不对称发射的相控阵列，导致扭曲的波束形状。为了克服这个问题，我们将阵列孔径分为两个子孔径，分别形成两个扫描光束。结果，极大地减小了估计误差。我们还证明，这种误差甚至可以减少到几毫米，通过执行粗到细的两个阶段的估计作为后处理。
We propose a three-dimensional self-positioning method of the single microphone situated in the acoustic field containing the steered Bessel beams generated by a two-dimensional planar ultrasound phased array. The presented method is a modified version of the previously proposed one that suffered from considerable positioning errors. In this paper, we report that this error is caused from asymmetric emission of the phased array that results in distorted beam shape. To overcome this problem, we divided the array aperture in two sub-apertures that separately formed two scanning beams. As a result, the estimation error is tremendously reduced. We also demonstrate that this error can be even reduced to several millimeters by performing coarse-to-fine two stage estimation as a post processing.