Simultaneous determination of the ultrasound velocity and the thickness of solid plates from the analysis of thickness resonances using air-coupled ultrasound.
A method that combines transmission of air-coupled ultrasound pulses through solid plates and amplitude and phase spectral analysis is presented. In particular, the method analyzes the first thickness resonance of the plates. The purpose is to determine, simultaneously, velocity and attenuation coefficient of the ultrasounds in the material and the thickness of the plate. This is especially useful when thickness can not be measured independently. The method is successfully applied to soft membranes, biological samples and FRP composites.
Gómez Alvarez-Arenas
Tomás E
TE
Ultrasonic Signals, Systems and Technologies Dept., Instituto de Acústica, CSIC, Serrano 144, 28006 Madrid, Spain.
D000388:Air; D054459:Elasticity Imaging Techniques / Q000295:instrumentation*; D004867:Equipment Design; D008962:Models, Theoretical; D011108:Polymers; D014159:Transducers; D014465:Ultrasonics; D014675:Vegetables
D011108:Polymers