Measuring and testing – With fluid pressure – Leakage
Patent
1991-02-26
1993-08-24
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 414, G01M 306
Patent
active
052378551
ABSTRACT:
A method and apparatus for leak testing a fluid containing chamber wherein the chamber is pressurized with a gas and is submerged in a liquid. The bubbles of gas rising from the submerged chamber are directed past a plurality of a predetermined locations that are each in optical communication with a photoelectric detector. The signals from the detectors are counted and when the number of bubbles exceeds a predetermined number, a signal is activated indicating a leaking container. By grouping a number of adjacent photoelectric detectors into a predetermined set, the apparatus can discriminate between random bubbles rising from the chamber surface as it is submerged and a number of bubbles all originating from a given location indicating a leak. The photoelectric detectors may be positioned in the liquid adjacent the predetermined locations or positioned out of the liquid and coupled to the predetermined locations by fiber optic cables. Alternatively, a laser beam can be directed across the predetermined location and received by a detector on the opposite side of the laser source. When a bubble interrupts the laser beam, a signal is generated.
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Leak Testing, Chapter 6, pp. 6-65 through 6-82, ASME Handbook Tool & Manufacturer.
Expertek, Inc.
Roskos Joseph W.
Williams Hezron E.
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