Swept-frequency, magnetically-coupled resonant tags for realtime, continuous, multiparameter control

1 January 1999

proceedings article
Published by Association for Computing Machinery (ACM)

p. 212-213
https://doi.org/10.1145/632716.632848

Abstract

We have developed a passive tag reader optimized for applications in human-computer interaction. It sweeps through a 50-300 kHz read frequency, flagging any magnetically-coupled resonators in that range. It is a minimally-complicated circuit, and is able to provide the center frequency, resonance width, and amplitude for each detected tag over a serial line at 30 Hz continuous updates. The tags are easily fashioned, consisting only of an inductor and capacitor or magnetostrictor tag cut to appropriate length. We have written an engaging musical application to demonstrate this system, tagging over 11 different objects and tracking their proximity and state, launching or modifying musical sounds in accordance.

Keywords

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