surface acoustic wave (saw) vibration sensors声表面波(看到)振动传感器.pdf

Sensors 2011, 11, 11809-11832; doi:10.3390/s111211809 OPEN ACCESS sensors ISSN 1424-8220 /journal/sensors Article Surface Acoustic Wave (SAW) Vibration Sensors Jerzy Filipiak 1, Lech Solarz 2,* and Grzegorz Steczko 1 1 Institute of Electronic and Control Systems, Technical University of Czestochowa, 17 A.K. Str., 42-200 Częstochowa, Poland; E-Mails: filipiak@el.pcz.czest.pl (J.F.); gem@.pl (G.S.) 2 Department of Civil Engineering, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland * Author to whom correspondence should be addressed; E-Mail: lechsolarz@interia.pl; Tel./Fax: +48-22-6318-768. Received: 5 November 2011; in revised form: 5 December 2011 / Accepted: 15 December 2011 / Published: 19 December 2011 Abstract: In the paper a feasibility study on the use of surface acoustic wave (SAW) vibration sensors for electronic warning systems is presented. The system is assembled from concatenated SAW vibration sensors based on a SAW delay line manufactured on a surface of a piezoelectric plate. Vibrations of the plate are transformed into electric signals that allow identification of the sensor and localization of a threat. The theoretical study of sensor vibrations leads us to the simple isotropic model with one degree of freedom. This model allowed an explicit description of the sensor plate movement and identification of the vibrating sensor. Analysis of frequency response of the ST-cut quartz s