Inspection system and method

摘要

An electronic system for detecting faults or flaws in individual items of a stream of items has a single row of light sensors and a light source and detects the presence of an item between source and detectors, establishes a reference level for comparison that is a function of the individual item under inspection, and produces a fault signal from any individual sensor having a change in incident light that is a predetermined amount greater than the reference level and which occurs within a predetermined adjustable portion of the item passing the sensors.