Carnegie Mellon University
Wireless Power Delivery for Serivce-life Indicators in Chemical Sensors
Low-cost chemical sensors that can be installed to monitor service-life inside sealed, replaceable, activated
-carbon filter cartridges are being designed. Such service-life indicators can be used to determine the state of the cartridge and the need for
its replacement. Fully-integrated chemical sensors are being designed in CMOS-MEMS technology in a sister project. Wireless powering of the
sensors greatly simplifies the installation of the cartridges and preserves the structural integrity of the cartridge by elminiating connection
wires. Local power reception and management circuits for use within the senensors electronics are being developed. A batter-powered transmitter
acts as the power source, and is installed external to the cartridge in the gas mask. I will present an inductive power link designed for this
purpose. I will introduce the limitations for such powering method, develop a theoretical model of the desired inductive link and then assess
this theoretical model based on experiment data obtained using a developed prototype.
Ahmad Khairi is currently an M.S/Ph.D. student in Electrical and Computer Engineering at Carnegie Mellon
University, advised by Professor Jeyanandh Paramesh. He recieved his B.S degree from Harvard University, USA, in 2004. His research interests
include wireless power transfer and its biomedical and environmental applications and low power sensors.