K-space Prony's method for generating the basis functions of multi-Gaussian beam models.
The expansion coefficients of a multi-Gaussian ultrasonic beam model are obtained by a new approach that applies Prony s method in a K-space domain. This method allows the fitting of the Gaussian beam directly at the face of the transducer with very high computational efficiency. It is demonstrated that the K-space Prony's method can be used to accurately model the transducer field of planar and focused piston transducers, as well as probes that do not act as pistons. The choice of parameters appearing in the method and their influence on performance are discussed.
Schmerr
Lester W
LW
Center for NDE and the Dept. of Aerospace Engineering, Iowa State University, Ames, Iowa 50011, USA. lschmerr@cnde.iastate.edu
Lopez-Sanchez
Ana L
AL
Sedov
Alexander
A
D008962:Models, Theoretical; D016011:Normal Distribution; D014159:Transducers; D014465:Ultrasonics