There is significant need for arrays of miniature sensors that are completely wireless. Ideally these sensors would be built as an integrated device, including sensing elements, computation/signal conditioning, communication, and an on-board power supply. However, they have not been developed due to the difficulty with integrating sensing ele-ments, and the absence of miniature power supplies. The purpose of this Phase I program is to address these two issues, and make viable, wireless, miniature sensors. Bipolar Technologies has pioneered the development of micro-scopic rechargeable batteries, built with IC processes, for direct integration into microcircuits. When combined with miniature energy scavengers, a hybrid power supply can be created, to provide autonomy for wireless sensors. During Phase I, the concept of using a miniature hybrid power supply will be demonstrated with arrays of prototype sensors, built with commercial off-the-shelf components. Microscopic, microfabricated lithium polymer batteries will be engineered, fabricated and used as part of the hybrid power supply. Phase II will be used to refine the micro-fabrication processes used to make batteries and sensors, so that completely integrated multisensors can be delivered to and used by NASA. This micropower supply will enable a new class of completely wireless sensors.
