Title :
A tracking vision sensor system
Author :
Wellington, S. ; King, G.A. ; Crowder, R.M.
Author_Institution :
Div. of Inf. Syst., Southampton Inst. of Higher Educ., UK
Abstract :
The initial aim was to develop a nontactile scanner capable of tracking a weld seam during robot welding operations. In addition, it was intended to investigate AGV guidance and surface inspection applications. The scanner is based on the `flying spot´ principle as described by Batchelor et al. (1985), with a low power helium-neon laser scanned across the work-piece by means of a mirror rotated at constant speed using a stepper motor. Clearly the scan rate of the laser across the work-piece is determined by the number of sides on the mirror and the switching rate of the motor, while the scan length is a function of the distance between mirror and work-piece and the number of sides on the mirror. An eight-sided mirror has been selected as this gives the maximum scan rate with the required scan length and stand off height
Keywords :
computer vision; image sensors; inspection; laser beam welding; tracking; AGV guidance; He-Ne laser; mirror; nontactile scanner; robot welding; scan length; scan rate; stand off height; stepper motor; surface inspection; switching rate; tracking vision sensor system; weld seam;
Conference_Titel :
Binary Image Processing - Techniques and Applications, IEE Colloquium on
Conference_Location :
London
