Measuring and testing – With fluid pressure – Leakage
Patent
1984-04-23
1985-06-18
Hruskoci, Peter
Measuring and testing
With fluid pressure
Leakage
73 492, 340605, G01M 326
Patent
active
045234523
ABSTRACT:
An improved method of measuring leak rates by placing a source of fluid pressure in communication with a cavity being tested, and measuring the flow rate to the cavity after a predetermined time to determine the leak rate from the cavity. The improved method achieves a determination of the leak rate in a shorter time than that required to establish steady state flow conditions between the pressure source and the test piece cavity. The improved method measures the flow rate to the test piece cavity at a much earlier time after pressurization of the cavity than normally required to establish such steady state conditions, and applies a previously generated calibration function based on a linear correspondence between the measured flow rates and the steady state flow rates. Flow rate measurements at the earlier time in the test cycle in regular testing of testing pieces are converted to steady state flow rates by application of the calibration function to substantially shorten the time required for leak rate testing of the test pieces.
REFERENCES:
patent: 3123900 (1963-03-01), Millar
patent: 3331237 (1967-07-01), Strang
patent: 3691821 (1972-09-01), Davey
patent: 3872712 (1975-03-01), Westervelt et al.
patent: 3893332 (1975-07-01), Dolan et al.
patent: 4350038 (1982-09-01), Soncrant
patent: 4364261 (1982-12-01), Askwith et al.
Benefiel John R.
Hruskoci Peter
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