Title :
Temperature-dependent characteristics of a density sensor based on Lamb waves generated with a P(VF2-VF3) film
Author :
Scandelari, Luciano ; Noury, Norbert ; Benech, Philippe ; Chamberod, Ericc
Author_Institution :
Lab. d´´Instrum. Micro-Inf. et Electron., Univ. Joseph Fourier, Grenoble, France
Abstract :
We present the temperature-dependent characteristics of a Lamb wave device used as a liquid density sensor. Its fabrication process was simplified using a P(VF2-VF3) film stuck on a non-piezoelectric medium. The lowest order antisymmetric Lamb waves (A 0 mode) are used for measurements. We measured the phase and group velocities of the waves for different concentrations of NaCl and we analyzed the temperature dependent performance of our device. The synchronism frequency decreases almost 1.4 kHz per Celsius degree increase. Insertion loss decreases with increasing temperature
Keywords :
density measurement; piezoelectric thin films; piezoelectric transducers; polymer films; sodium compounds; surface acoustic wave sensors; Lamb wave device; NaCl solutions; P(VF2-VF3) film; SAW transducer; group velocities; insertion loss decrease; liquid density sensor; lowest order antisymmetric Lamb waves; phase velocities; piezo-copolymer film; polyvinylfluoride based polymers; simplified fabrication process; synchronism frequency decrease; temperature-dependent characteristics; Acoustic measurements; Acoustic propagation; Acoustic waves; Character generation; Electrodes; Fabrication; Insertion loss; Sensor phenomena and characterization; Temperature sensors; Velocity measurement;
Conference_Titel :
Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-4153-8
DOI :
10.1109/ULTSYM.1997.663041
