Method and apparatus for real time detection of faults in industrial objects
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United States of America Patent
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-
Feb 21, 1984
Grant Date -
N/A
app pub date -
Jan 13, 1981
filing date -
Jan 14, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method and apparatus for the detection of faults in industrial objects and signalling such faults to handling apparatuses. According to the invention, the image is taken of a sample object by a television camera or other sensing device; the image is digitized and stored in a frame memory. The digitized sample (standard) image is then divided into small areas, for each of which the square root of variance (standard deviation) for the luminance levels of dots belonging to each area is calculated and stored. The same operations and elaborations are followed for each object to be checked and the obtained values are compared with those of the sample. When the differences thereof are above predetermined thresholds, an output signal is generated for distinguishing the fault and generally the faulty object and for controlling a handling apparatus for the objects.
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