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�������պ����ѧѧ�� 2006, Vol. 32 Issue (01) :79-82    DOI:
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������, ������, ��ѫ, �ŵ�Զ*
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Focusing ultrasonic levitation
Pan Xiangsheng, Xing Lihua, Li Xun, Zhang Deyua*
School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� The technique of ultrasonic levitation has a wide application in the containerless processing and manufacturing of materials and the status simulation of space on the Earth. Taking advantage of the principle of ultrasonic focusing, a single axis ultrasonic levitation system was set up with the radiator designed into a concave circular one so as to improve the system’s capability of levitation. The distributions and characteristics of the sound field were investigated theoretically. The further research based on the numerical analysis was also conducted. Three sorts of ultrasonic levitation configurations were fabricated and a series of experiments were carried out consequently. The results show that the capability of levitation is directly proportional to the curvature radius of the radiator, as well as the distance between it and the reflector. And the results also proved that the performance of the focusing ultrasonic levitation system is higher than that of the conventional one.
Keywords�� ultrasonic transducers   acoustic radiators   focusing   numerical analysis     
Received 2004-10-28;
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About author: ������(1978-),��,����������,��ʿ��, pxsben@163.com.
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������, ������, ��ѫ, �ŵ�Զ.�۽�ʽ��������[J]  �������պ����ѧѧ��, 2006,V32(01): 79-82
Pan Xiangsheng, Xing Lihua, Li Xun, Zhang Deyua.Focusing ultrasonic levitation[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(01): 79-82
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