Non-contact Method for Producing Tactile Sensation Using Airborne Ultrasound

Authors:
Takayuki Iwamoto;Mari Tatezono;Hiroyuki Shinoda
Affiliations:
Department of Information Physics and Computing Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan;Department of Information Physics and Computing Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan;Department of Information Physics and Computing Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan
Venue:
EuroHaptics '08 Proceedings of the 6th international conference on Haptics: Perception, Devices and Scenarios
Year:
2008

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Abstract

This paper describes a new tactile device which produces stress fields in 3D space. Combined with 3D stereoscopic displays, this device is expected to provide high-fidelity tactile feedback for the interaction with 3D visual objects. The principle is based on a non-linear phenomenon of ultrasound, acoustic radiation pressure. We fabricated a prototype device to confirm the feasibility as a tactile display. The prototype consists of 91 airborne ultrasound transducers packed in the hexagonal arrangement, a 12 channel driving circuit, and a PC. The transducers which were in the same distance from the center of the transducer array were connected to form a 12 channel annular array. The measured total output force within the focal region was 0.8 gf. The spatial resolution was 20 mm. The prototype could produce sufficient vibrations up to 1 kHz.