Title :
Detection of mesa spots and indents on slowly moving object surface by laser-light beam scanning
Author :
Shinohara, Shigenobu ; Uda, Hidenobu ; Ichioka, Yoshiyuki ; Yasui, Hiroaki ; Yoshida, Hirofumi ; Ikeda, Hinata ; Sumi, M.
Author_Institution :
Shizuoka Univ., Hamamatsu, Japan
Abstract :
Measuring time of mesa spots and indents on a slowly moving (less than 8 mm/s) is greatly reduced to 3.5 seconds (for 121 points) by utilizing a 3D range image measuring system. In the system, a laser light beam from a range-finding speedometer is mechanically scanned to illuminate a successive point on the object surface. The minimum detectable size of a square mesa or a square indent which is moving 2 times the minimum scanning length (MSL=7.6 mm), and the minimum detectable depth of those was 6 mm-7 mm
Keywords :
laser ranging; laser velocimetry; motion estimation; object detection; position measurement; 3.5 s; 3D range image measuring system; 6 mm; indent detection; laser-light beam scanning; mesa spot detection; range-finding speedometer; slowly moving object surface; Laser beams; Object detection; Optical modulation; Pulse measurements; Size measurement; Surface emitting lasers; Thickness measurement; Time measurement; Velocity measurement; Vibration measurement;
Conference_Titel :
SICE '95. Proceedings of the 34th SICE Annual Conference. International Session Papers
Conference_Location :
Hokkaido
Print_ISBN :
0-7803-2781-0
DOI :
10.1109/SICE.1995.526650
