Dexterous ultrasonic levitation of millimeter-sized objects in air

IEEE Trans Ultrason Ferroelectr Freq Control. 2014 Jul;61(7):1233-6. doi: 10.1109/TUFFC.2014.3022.

Abstract

Acoustic levitation in air has applications in contactless handling and processing. Here a first-order Bessel function-shaped acoustic field, generated using an 8-element circular array operating at 40 kHz, traps millimeter-sized objects against gravity. The device can manipulate objects in a vertical plane over a few millimeters with an accuracy of ± 0.09 mm.

Publication types

  • Letter
  • Research Support, Non-U.S. Gov't