Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Lester W"'
Publikováno v:
Ultrasonics. 97:57-62
A non-paraxial multi-Gaussian beam (NMGB) model is proposed for Leaky Rayleigh Waves (LRWs) generated by a focused immersion transducer at oblique incidence. Using the NMGB model, the velocity fields are calculated and compared with the corresponding
Publikováno v:
Ultrasonics. 50:600-605
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 ver
Autor:
Lester W. Schmerr, Ruiju Huang
Publikováno v:
Ultrasonics. 49:219-225
This work characterizes the electrical and electromechanical aspects of an ultrasonic linear phased array inspection system, using a matrix of system functions that are obtained from the measured response of individual array elements in a simple refe
Publikováno v:
Ultrasonics. 44:e969-e974
To date, ultrasonic measurement models have primarily treated systems where circular transducers are used. Recently, however, a highly efficient ultrasonic beam model for a rectangular transducer has also become available where the transducer is repr
Publikováno v:
Ultrasonics. 44:e981-e984
It has recently been demonstrated that the Born approximation for predicting the scattering response of flaws can be improved through the use of simple modifications called the “doubly distorted Born approximation”. In this paper the doubly disto
Autor:
Lester W. Schmerr, C.-P. Chiou
Publikováno v:
Ultrasonics. 29:471-481
One of the important flaw characterization tasks in the field of ultrasonic non-destructive evaluation (NDE) is to provide flaw type information by analysing the flaw responses acquired during an inspection. Here a new quasi pulse-echo ultrasonic cla
Publikováno v:
Ultrasonics. 44
Transmitting and receiving properties of ultrasonic piezoelectric crystal transducers that directly affect the measured output voltage in an ultrasonic measurement system are described. These transducer properties are the transducer's electrical impe