Image blanking circuit for line follower

Details Image blanking circuit for line follower Image blanking circuit for line follower

G - Physics

06

K

340/134.2

G06K 11/02 (2006.01) B23Q 35/128 (2006.01) G05B 19/00 (2006.01) G08C 21/00 (2006.01)

Patent

CA 1185341

ABSTRACT OF THE DISCLOSURE A window generation circuit is provided for gating image signals from an an electronically scanned sensor array in a line tracing machine. The window generation circuit includes two shift registers of variable length for measuring intervals of time for setting first and second bounds to a sector scan. The interval of the second register corresponds to the width of the window. Logic circuitry, responsive to the detection of image data, alters the electrical lengths of the registers to enlarge the window in the absence of an image, and restores the original lengths upon return of the image. -27-

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