Title :
Re-configurable Completely Unpowered Wireless Sensors
Author :
Brocato, Robert W. ; Wouters, Gregg A. ; Heller, Edwin ; Blaich, Jonathan ; Palmer, David W.
Author_Institution :
Sandia Nat. Labs., Albuquerque
fDate :
May 29 2007-June 1 2007
Abstract :
A methodology for remotely and wirelessly reading any type of unpowered impedance varying sensor is described. Unpowered wireless sensors, in existence for a number of years, have been limited to low impedance sensors. Techniques for reading high impedance sensors are introduced here. The resulting methodology can be used to measure a wide range of different sensors, including temperature, pressure, light level, mechanical switch, acoustic emission, and acceleration. These sensors report physically measurable data in the same manner as do similar conventional sensors, but they do it remotely and without any local power source. The sensors are measured remotely using a radar-like interrogation device, and the sensors and their related communication electronics draw all of the power needed for communicating from the radar pulse.
Keywords :
radar; remote sensing; wireless sensor networks; communication electronics; impedance sensor; impedance varying sensor; radar-like interrogation device; unpowered wireless sensor; Acoustic measurements; Acoustic sensors; Impedance; Mechanical sensors; Power measurement; Pulse measurements; Sensor phenomena and characterization; Switches; Temperature sensors; Wireless sensor networks; SAW correlator; passive; sensors; wireless;
Conference_Titel :
Electronic Components and Technology Conference, 2007. ECTC '07. Proceedings. 57th
Conference_Location :
Reno, NV
Print_ISBN :
1-4244-0985-3
Electronic_ISBN :
0569-5503
DOI :
10.1109/ECTC.2007.373795