Title :
Low frequency PVDF transducers for 3D object profiling in air
Author :
Capineri, L. ; Fiorillo, A.S. ; Rocchi, S.
Author_Institution :
Dept. of Electron. Eng., Florence Univ., Italy
Abstract :
The feasibility of a 3D ultrasonic scanner in air for the profile reconstruction of a shoe tree is discussed. The severe requirements on the spatial resolution (about 100 μm) stress the ultrasound technique performance. High resolution time-of-flight measurement techniques based on phase measurement are combined with the ellipsoidal back-projection image reconstruction algorithm. A laboratory set-up is assembled to evaluate the achievement of the desired resolution by using wooden phantoms with constant cross sections characterised by sharp edges and low curvature radius. Preliminary experimental results are reported that show the system capability to reconstruct cross section profiles with rms and maximum errors equal to 0.38 mm and 1.2 mm respectively
Keywords :
distance measurement; image reconstruction; image resolution; piezoelectric transducers; polymer films; ultrasonic imaging; ultrasonic transducer arrays; 3D object profiling; 3D ultrasonic scanner; PVDF transducers; US distance measurement; air; constant cross sections; ellipsoidal back-projection image reconstruction algorithm; high resolution time-of-flight measurement techniques; low curvature radius; maximum errors; phase measurement; rms errors; sharp edges; shoe tree profile reconstruction; spatial resolution; wooden phantoms; Footwear; Frequency; Image reconstruction; Image resolution; Measurement techniques; Phase measurement; Spatial resolution; Stress; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495710