Structural parameter study of dual transducers-type ultrasonic levitation-based transportation system
Structural parameter study of dual transducers-type ultrasonic levitation-based transportation system
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DOI：
10.1088/1361-665x/abe4e4
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发表时间：
2021-04-01
影响因子：
4.1
通讯作者：
Sun, Tong
中科院分区：
文献类型：
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作者：
Mu, Guanyu;Zhao, Jie;Sun, Tong
在制造业和制药业中，具有连续的运输模式是期望的，并且这通过使用双换能器类型的基于超声悬浮的运输系统来促进。众所周知，结构参数和电参数决定了什么可以连续输送，但这些重要参数之间的关系仍然不清楚。在这项研究中，振动板的长度和两个换能器之间的相移进行了研究，因为这两个都是运输系统的关键参数，并影响驻波比（SWR），声辐射力，从而运输系统的运作方式。通过数值分析和实验验证可知，当空间相位差之和或之差（由振动板长度确定）并且相移等于180度x（1 + 2n）（其中n是整数），除了180度中心点m的空间相位差（其中m也是整数）并且驻波比接近1，所有这些都意味着行波（TW）在振动板上被主导地激发。因此，大大超过驻波诱导力的TW诱导的声辐射力导致在声场中移动的颗粒的连续运输。本文不仅阐明了产生这种连续运输的要求，而且还提供了有价值的信息，这样的运输系统的实际设计。
Having a continuous mode of transportation, in the manufacturing and pharmaceutical industries, is desirable and this facilitated by the usage of dual transducer-type ultrasonic levitation-based transportation systems. It is well known that the structural and electrical parameters determine what can be transported continuously, but the relationships between these important parameters are still not clear. In this study, the vibrating plate length and the phase shift between the two transducers were investigated as both of these are key parameters for the transportation system, and affect the standing wave ratios (SWRs), the acoustic radiation forces, and consequently the way the transportation system operates. Through numerical analysis and experimental verification, it can be seen that when the sum or difference of the spatial phase difference (determined by the vibrating plate length) and the phase shift is equal to 180 degrees x (1 + 2n) (where n is an integer), except for the spatial phase difference of 180 degrees center dot m (where m is also an integer) and the SWRs approaches unity, all this implying that traveling waves (TWs) are dominantly excited on the vibrating plate. As a consequence, the TW-induced acoustic radiation force, which greatly exceeds the standing wave-induced force, causes the continuous transportation of the particle being moved in the sound field. This paper not only clarifies the requirements for generating this continuous transportation, but also provides valuable information on the practical design of such a transportation system.