NSTI Nanotech 2009

A Novel Virtual Button User Interface for Determining the Characteristics of an Impulse Input Based on MEMS Inertial Sensors

A. Zwart, D. Effa, P. Nieva, S. Lancaster-Larocque
University of Waterloo, CA

Keywords: inertia sensor, electronic device, modes of vibration, impulse, software

Abstract:

This paper introduces a novel application of MEMS accelerometer in consumer electronics device for a ‘Virtual Button’ Technology. MEMS based accelerometers is designed in order to measure low-g acceleration to sense tapping motion on the cellophane or other electronics device. The paper outlines this, patented application and discusses the modeling and analysis of an accelerometer primarily designs for this purpose. The analytical model of the device developed and compared with FEA modeling with reasonable agreement. The desired resolution for this accelerometer is 5-20 m/s2 with a noise level less than 0.124mg/root Hz . A prototype MEMS accelerometer fabricated and the test results showed that the prototypes’ sensing capabilities are fit to use in consumer applications.
 
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