SMART DUST MOTE FORERUNNERS
Abstract
We have demonstrated a 138mm3 autonomous uni-directional sensing/communication mote that optically transmits a measure of the ambient light level. We have also developed a 6 3 m 3 autonomous bi-directional communication mote that receives an optical signal, generates a pseudorandom sequence based on this signal to emulate sensor data, then optically transmits the result, although it has only been demonstrated in a bench configuration at this time. The latter system contains a micromachined comer cube reflector, a 0.078mm3 CMOS chip that consumes 75pW, and a Mn-Ti-Li cell, but we have also demonstrated operation from an -2mm2 solar cell. These motes allow us to demonstrate necessary concepts of Smart Dust such as optical data transmission, data processing, energy management, miniaturization, and system integration.
Written by arjun on November 10th, 2008 with
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