Felix Sundblad, Denys Iablonskyi, Axi Holmström, A. Salmi, E. Hæggström
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引用次数: 0
摘要
控制悬浮仅限于亚波长样品，很少有球体和立方体例外。我们演示了2λ大小的复杂形状物体(3D字母，X, U, T)的可控空中悬浮。通过布置多个小的不对称声阱，可以根据特定的样品形状定制压力场。这允许稳定锁定的对象和控制其方向和位置在半空中。压力场是由一个450元相控阵(f = 40kHz)产生的，该相控阵具有单元振幅和相位控制。
Position and Orientation Control of Complex-Shaped Samples in Acoustic Levitation
Controlled levitation has been limited to sub-wavelength samples with few exceptions of spheres and cubes. We demonstrate controlled airborne levitation of 2λ-sized complex-shaped objects (3D letters, X, U, T). The pressure field was tailored to a particular sample shape by arranging multiple small asymmetric acoustic traps. This allows stable locking of the object and control of its orientation and position in mid-air. The pressure field was produced with a 450-element phased array (f = 40kHz) featuring element-wise amplitude and phase control.
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