Title :
SAW devices as wireless passive sensors
Author :
Reindl, L. ; Scholl, G. ; Ostertag, T. ; Ruppel, C.C.W. ; Bulst, W.-E. ; Seifert, F.
Author_Institution :
Corp. Res. & Dev., Siemens AG, Munich, Germany
Abstract :
Surface acoustic wave (SAW) radio sensors make it possible to read measurement values from a remote location. The decisive advantage of these SAW sensors lies in their passive operation with no need for a separate power supply, and in the possibility of wireless installation at particularly inaccessible locations. The passive SAW sensors are maintenance free. The physical or chemical properties that shall be detected change the propagation characteristics of the SAW. In this paper we compare the sensitivity of different types of SAW sensors. These are resonators, reflective delay lines, and dispersive structures. Examples for several applications are presented
Keywords :
chemical sensors; mechanical variables measurement; radiotelemetry; remote sensing; sensitivity analysis; surface acoustic wave delay lines; surface acoustic wave resonators; surface acoustic wave sensors; temperature measurement; temperature sensors; SAW devices; SAW radio sensors; dispersive structures; maintenance free sensors; reflective delay lines; remote location; resonators; sensitivity; wireless passive sensors; Acoustic measurements; Acoustic sensors; Acoustic waves; Chemical sensors; Delay lines; Power supplies; Sensor phenomena and characterization; Surface acoustic wave devices; Surface acoustic waves; Wireless sensor networks;
Conference_Titel :
Ultrasonics Symposium, 1996. Proceedings., 1996 IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-3615-1
DOI :
10.1109/ULTSYM.1996.583993
