Ultrasonic array is able to move objects in 3D space
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Three Japanese researchers, Yoichi Ochiai,  Takayuki Hoshi, and Jun Rekimoto, have managed to create an ultrasonic array that can push items around in 3D space. The system has two original features. One is the direction of the ultrasound beam, which is arbitrary because the force acting toward its centre is also utilised. The other is the manipulation principle by which a localised standing wave is generated at an arbitrary position and moved three-dimensionally by opposed and ultrasonic phased arrays.

Ultrasonic levitation has been possible for awhile, but it’s not very practical when objects must typically hover along a single axis. University of Tokyo researchers Yoichi Ochiai, Takayuki Hoshi and Jun Rekimoto have cleared this hurdle with an ultrasonic array that can push items around in 3D space. The machine creates a focal point from a three-dimensional standing wave; users just have to alter the wave’s properties to move whatever is caught inside that point. The technique can manipulate a wide range of materials, and it’s safe to disrupt with your hands. While the array will need to scale up before it lifts objects much larger than matchsticks or screws, it already shows that we don’t need exotic technologies like tractor beams to float things through the air.

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