Method and apparatus for detecting checks in glass tubes

摘要: A method and apparatus for inspecting glass tubes fire checks other defects is disclosed. Each tube positioned on transport equipment moved through an inspection area as it rotated about its longitudinal axis by a spinner mechanism. broad source of diffused light illuminates each in the area. camera above moving line includes array photosensitive diodes arranged parallel to axes tubes. check will reflect higher intensity than non-defective portion tube. By averaging signals from first few scan camera, reference voltage level can be electronically determined scan. Any signal generated diode element which greater sum predetermined indicates presence defect