Title :
Wireless interrogator system for SAW-identification-marks and SAW-sensor components
Author :
Schmidt, F. ; Sczesny, O. ; Ruppel, C. ; Mágori, V.
Author_Institution :
Corp. Res. & Dev., Siemens AG, Munich, Germany
Abstract :
A sensor system is presented, comprising surface acoustic wave (SAW) components as identification marks (“ID-tags”) or as sensor elements for various tasks, and an interrogator for reading the sensor elements from a distance. As interrogator a chirp radar device at 2.45 GHz center frequency was developed, using a pair of dispersive SAW filters for pulse expansion and compression. It transmits expanded pulse signals to the SAW sensor elements and receives their responses. Reading ID-tags at a maximum distance of about 2.5 m with 10 mW peak output power, this system was successfully introduced to the Munich subway system for railway vehicle identification at high speed
Keywords :
FM radar; pulse compression; radar equipment; railways; surface acoustic wave filters; surface acoustic wave sensors; surface acoustic wave signal processing; 10 mW; 2.45 GHz; 2.5 m; ID-tags; Munich subway system; SAW-identification-marks; SAW-sensor components; chirp radar device; dispersive SAW filters; pulse compression; pulse expansion; railway vehicle identification; wireless interrogator system; Acoustic sensors; Acoustic waves; Chirp; Dispersion; Frequency; Radar; Sensor systems; Surface acoustic wave devices; Surface acoustic waves; Wireless sensor networks;
Conference_Titel :
Frequency Control Symposium, 1996. 50th., Proceedings of the 1996 IEEE International.
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-3309-8
DOI :
10.1109/FREQ.1996.559845
