Measuring and testing – With fluid pressure – Leakage
Patent
1994-05-03
1996-08-20
Williams, Hezron E.
Measuring and testing
With fluid pressure
Leakage
73 492, G01M 326, G01M 332
Patent
active
055467890
ABSTRACT:
A leakage detection system and method for measuring pressure leaks from pressure vessels, containers, or the like which hold or exclude fluids. A sealed test fixture or bell jar surrounds the container or part under test and is connected to a reference pressurized reservoir. A reference bias flow is introduced into the bell jar to establish a "floor" or offset wherein any deviation measured from introduced bias flow indicates an anomaly. The test part is pressurized. The flow between the bell jar and the reference pressurized reservoir is measured by a mass flow leak sensor. The measured flow is used to determine the leakage of the test part by taking into account the previously introduced reference bias flow. The present invention provides accurate measurement of leaks having low flow rates occurring over short periods of time.
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Intech Industry, Article: "Mass Flow Sensing Improves Leak Detection", Jacques E. Hoffmann, Jul., 1991, ISA Reprint.
Balke David J.
Hoffmann Jacques E.
Intertech Development Company
Kwok Helen C.
Williams Hezron E.
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