Conference Paper

3D Ultrasonic Gesture Recognition

DOI: 10.1109/ISSCC.2014.6757403 Conference: International Solid State Circuits Conference

ABSTRACT An ultrasonic 3D gesture recognition system uses an array of AlN MEMS transducers and custom readout electronics to localize targets over a +/-45deg field of view up to 1m away. The rms localization error at 0.5m range is 0.4mm, 0.2deg, and 0.8deg for the range, x-angle, and y-angle axes, respectively. The 0.18μm CMOS ASIC comprises 10 independent channels with separate high voltage transmitters, readout amplifiers, and ADCs. Power dissipation is 400μW at 30fps, and scales to 5μW/ch at 10fps.

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    ABSTRACT: A miniaturized ultrasound range finder in a standard 0.8-μm CMOS technology is described. It uses thermally excited silicon membrane transducers to generate or detect ultrasound at 100 kHz and can measure distances up to 11 cm with an accuracy of 2.5 mm. The distance sensor is based on a quasi-continuous measurement requiring coherent ultrasound waves, that are delivered by an electro-mechanical phase locked loop. Circuit and system techniques as well as package considerations are presented which allow the range finder to be implemented as a fully integrated 0.8-μm CMOS microsystem
    IEEE Journal of Solid-State Circuits 01/2001; · 3.11 Impact Factor
  • A Micromechanical Ultrasonic Distance Sensor With >1 Meter Range. R Przybyla . Transducers Dig. Tech. Papers 2070-2073.
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May 20, 2014