Focusing ultrasonic levitation

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.