Title :
Fabrication and characterization of a SAW-oscillator-based sensing system including an integrated reciprocal counter and a wireless ZigBee transmission system
Author :
Francois, B. ; Martin, G. ; Grosclaude, Philippe ; Lamothe, Marc ; Goavec-Merou, Gwenhael ; Ballandras, S. ; Friedt, J.-M.
Author_Institution :
Dept. Temps-Frequence, ENSMM, Besancon, France
Abstract :
We focus here on the optimization of a sensing system based on SAW resonators inserted in an oscillation loop for very high accuracy measurements. We use single-port SAW resonators built on AT Quartz, inserted in a Colpitts oscillator loop operating near 434 MHz. A reciprocal counter then is implemented on a FPGA platform which communicates the counting result to the ZigBee transmission system using an IEEE 802.15.4 protocol at 2.4 GHz. This system was tested by measuring the temperature of a climatic oven, revealing a measurement accuracy of a couple of 10 μK.
Keywords :
Zigbee; field programmable gate arrays; surface acoustic wave oscillators; surface acoustic wave resonators; AT Quartz; Colpitts oscillator loop; FPGA platform; IEEE 802.15.4 protocol; SAW oscillator-based sensing system; SAW resonator; frequency 2.4 GHz; integrated reciprocal counter; oscillation loop; wireless ZigBee transmission system; Frequency measurement; Oscillators; Radiation detectors; Surface acoustic waves; Temperature measurement; Temperature sensors; Zigbee;
Conference_Titel :
Ultrasonics Symposium (IUS), 2010 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4577-0382-9
DOI :
10.1109/ULTSYM.2010.5935999
