Foreign matter detecting system

Details Foreign matter detecting system Foreign matter detecting system

1999-05-13

2000-06-27

Kim, Robert H.

Optics: measuring and testing

Inspection of flaws or impurities

Having predetermined light transmission regions

356239, G01N 1100

Patent

active

060813245

ABSTRACT:
For use in the production line for manufacturing a liquid product such as a beverage or a liquid drug, a system is provided for detecting foreign matter contained in the fluid which is being conveyed at high speed in a conduit and automatically removing the same. The system comprises an inspection station which is connected to the conduit and of which the inspection window for detecting foreign matter is made of at least a transparent material, an illuminating means for illuminating the subject to be inspected with light directed through the inspection station, an imaging means for picturing the subject to be inspected by directing an intensity of light to the inspection window and receiving transmission or reflection of the light, a detecting means for comparing the signal level where a part indicative in which the level of the video signal is sharply changing is emphasized and processed with a reference level for the subject to be inspected to detect the foreign matter contained in the fluid. When the foreign matter is detected by the detecting means, the fluid is temporarily switched to a branch of the tubular conduit by the open and close action of a control valve to systematically discharge a portion of the fluid where the foreign matter is present.

REFERENCES:
patent: 4906101 (1990-03-01), Lin et al.
patent: 4909930 (1990-03-01), Cole
patent: 5072108 (1991-12-01), Ishikawa

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