Ultrasonic transducer arrays realize non-contact manipulation using acoustic radiation force. Non-contact pick-up conventionally uses hemispherical ultrasonic arrays. However, particles on reflective stages cannot be picked up. In this study, we propose a multi-channel hemispherical ultrasonic transducer array for non-contact pick-up on a rigid stage with reflection. The phase and amplitude of each channel are optimized using the sound reproduction method. This creates an acoustic trap at only the desired position, and pick up can thus be realized on the rigid stage. To the best of our knowledge, this is the first study to demonstrate non-contact pickup using this approach.

超声波换能器阵列利用声辐射力实现非接触式操纵。非接触式拾取器通常使用半球形超声波阵列。但是，反射台上的粒子无法被拾取。在这项研究中，我们提出了一种多通道半球形超声换能器阵列，用于在具有反射的刚性台上进行非接触式拾取。使用声音再现方法优化每个通道的相位和幅度。这仅在所需位置产生声阱，因此可以在刚性舞台上实现拾音。据我们所知，这是第一项使用这种方法证明非接触式拾取的研究。