Document Type and Number:
Japanese Patent JPH0570783
Kind Code:
B2
Abstract:
An apparatus for detecting defects on a bottle mouth with a screw thread has an illuminating unit (10) for applying light to the mouth of a bottle under rotation; a photoelectric conversion unit (16) for photoelectrically converting a light transmitted image of the bottle mouth applied with light by the illuminating unit into electric signals; a defect detecting unit (24) for detecting a defect within a predetermined area in the light transmitted image photoelectrically converted by the photoelectric conversion unit, based on the brightness at predetermined at-least two points in each predetermined detection direction within the area; and a judge unit (26) for calculating the number of defects detected by the defect detecting unit and judging the presence of any defect of the bottle mouth based on the number of defects. The apparatus detects defect points from the light transmitted image of the bottle mouth and judges based on the number of defect points whether or not there is a defect of a bottle.
Inventors:
FUKUCHI HIROYUKI
NISHAMA MASATOSHI
SUGAWARA YUKIO
NISHAMA MASATOSHI
SUGAWARA YUKIO
Application Number:
JP24269386A
Publication Date:
October 05, 1993
Filing Date:
October 13, 1986
Export Citation:
Assignee:
KIRIN TECHNO SYSTEM KK
International Classes:
B08B9/46; G01N21/90; (IPC1-7): G01N21/90