Leak testing by gas flow signature analysis

Details Leak testing by gas flow signature analysis Leak testing by gas flow signature analysis

1987-08-11

1988-10-11

Noland, Tom

Measuring and testing

With fluid pressure

Leakage

G01M 326

Patent

active

047762063

ABSTRACT:
To leak test a cavity in a test item, a pressurizing gas, at a preselected pressure is applied to the test item and the flow rate of the pressurizing gas during pressurization is recorded. This recorded flow rate is compared with a threshold level based on gas flow signature data for a reference test item. If the recorded gas flow exceeds the threshold level, an excessive leak signal is produced. This leak testing method significantly reduces the time required to perform low flow rate leak detection in large volume test items.

REFERENCES:
patent: 3691821 (1972-09-01), Davey
patent: 3872712 (1975-03-01), Westervelt et al.
patent: 3918291 (1975-11-01), Pauly et al.
patent: 4350038 (1982-09-01), Soncrant
patent: 4523452 (1985-06-01), Brayman
patent: 4532795 (1985-08-01), Brayman et al.
patent: 4575807 (1986-03-01), Dodge

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