Inspection method and apparatus

Details Inspection method and apparatus Inspection method and apparatus

1975-06-09

1976-05-11

Stolwein, Walter

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250209, 356205, 235 6111E, G01D 2104

Patent

active

039566293

ABSTRACT:
Method and apparatus for inspection similar articles by first passing an ideal sample article through the field of view of a scanning array, generating a train of pulses corresponding to the image falling on the scanning array by sequentially interrogating each sensor in the array in response to a clock frequency, selecting discrete pulses from the train of pulses which are indicative of the characteristics of the sample article, and preferably pulses indicating perturbations, storing data identifying the selected pulses in a sample memory, sequentially passing other articles to be inspected past the scanning array and similarly generating and storing the identification data for selected characteristics pulses in an object memory, and comparing the stored data in the sample and object memories for correspondence between the data within preselected tolerances to determine correlation, or the absence of correlation, between the same article and each article to be inspected.

REFERENCES:
patent: 3591294 (1971-07-01), Neil
patent: 3754120 (1973-08-01), Fitzgerald et al.
patent: 3788749 (1974-01-01), George
patent: 3894215 (1975-07-01), Lotter et al.

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