Title :
Ultrasonic imaging system based on two-dimensional array of ultra-wavelength transducers
Author :
Titov, S.A. ; Maev, Roman Gr. ; Bogachenkov, A.N.
Author_Institution :
Inst. for Diagnostic & Imaging Res., Univ. of Windsor, Windsor, ON, Canada
Abstract :
A method of imaging of a flat reflector with a smooth boundary using two-dimensional array of ultra-wavelength transducers has been developed. The method is based on the comparison of the amplitudes of the echoes received by the elements of the array with the step response of the element and the reconstruction of the reflector´s boundary. The proposed method has been experimentally tested using the 15 MHz matrix array. The error of the measured diameter of the test hole in steel foil was found to be significantly lower than the pitch of the array. Also, the proposed technique was applied for measurement of the nugget size in the spot welds.
Keywords :
diameter measurement; image reconstruction; image sensors; measurement errors; optical elements; sensor arrays; size measurement; spot welding; ultrasonic imaging; ultrasonic transducers; diameter measurement error; echo amplitude; flat reflector imaging method; frequency 15 MHz; matrix array; nugget size measurement; reflector boundary reconstruction; spot weld; steel foil hole testing; step response; two-dimensional array; ultrasonic imaging system; ultrawavelength transducer; Accuracy; Acoustics; Arrays; Estimation; Imaging; Spot welding; Transducers; imaging; matrix array; oversampling; spot weld; step function;
Conference_Titel :
Ultrasonics Symposium (IUS), 2012 IEEE International
Conference_Location :
Dresden
Print_ISBN :
978-1-4673-4561-3
DOI :
10.1109/ULTSYM.2012.0612
