Method and means for detecting foreign particles in liquid filled containers

摘要: A liquid filled transparent container is spun momentarily and successive video frames are then taken by a camera while the swirls in stationary container. One or more of these can be stored memory digitized form. Two compared electronically, ''''subtracting'''' one from other, to generate reject signal when ''''difference'''' exceeds some preset number pulses. The threshold voltage for frame being generated altered reference order increase sensitivity that at discrete points corresponding voltages exceeding desensitized all other reduce likelihood spurious signals.