Title :
Air-coupled piezoelectric detection of laser-generated ultrasound
Author :
Hutchins, David A. ; Wright, William M D ; Hayward, Gordon ; Gachagan, Anthony
Author_Institution :
Dept. of Eng., Warwick Univ., Coventry, UK
Abstract :
A pulsed laser has been used to generate ultrasonic transients in samples of metal and fiber-reinforced polymer composite material. These have been detected using an air-coupled piezoelectric transducer. It is demonstrated that such a transduction system can be used for longitudinal waves in bulk material, Rayleigh waves at solid surfaces and Lamb waves in thin plates.<>
Keywords :
Rayleigh waves; piezoelectric transducers; surface acoustic wave devices; ultrasonic transducers; Lamb waves; Rayleigh waves; air-coupled piezoelectric detection; bulk material; composite material; laser-generated ultrasound; longitudinal waves; piezoelectric transducer; pulsed laser; solid surfaces; transduction system; ultrasonic transients; Fiber lasers; Optical materials; Optical pulse generation; Optical surface waves; Piezoelectric transducers; Rough surfaces; Solid lasers; Surface roughness; Surface waves; Ultrasonic imaging;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
