Fluid leakage detection apparatus

Details Fluid leakage detection apparatus Fluid leakage detection apparatus

1975-06-30

1976-10-26

Watkins, Donald E.

Measuring and testing

With fluid pressure

Leakage

23515134, 340242, G01M 328

Patent

active

039876624

ABSTRACT:
An apparatus detects a leakage position between the upstream and downstream points of a fluid passage, where the fluid leaks. The flow rate of the fluid is detected both at the upstream and downstream points repeatedly at intervals much shorter than a difference .DELTA..tau. between time .tau..sub.1 and time .tau..sub.2 which elapse until a flow rate change appears respectively at the upstream and downstream points. Thus the pattern of the flow rate variation is detected with respect to the time .tau..sub.1 and the time .tau..sub.2, thereby obtaining the time difference .DELTA..tau.. Based on the time difference .DELTA..tau., the distance x between the upstream and downstream points is obtained, thus locating the fluid leakage position, by the following formula: ##EQU1## where l denotes the distance between the upstream and downstream points, and a the speed of sound through the fluid.

REFERENCES:
patent: 3505513 (1970-04-01), Fowler et al.
patent: 3667285 (1972-06-01), Wright et al.
patent: 3690150 (1972-09-01), Mullen
patent: 3695094 (1972-10-01), Hulme
patent: 3702074 (1972-11-01), Mullen
patent: 3711689 (1973-01-01), Park
patent: 3723987 (1973-03-01), Barone, Jr. et al.
patent: 3807220 (1974-04-01), Ottenstein et al.
patent: 3851521 (1974-12-01), Ottenstein
patent: 3854038 (1974-12-01), McKinley

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