Measuring and testing – Vibration – By mechanical waves
Patent
1988-04-08
1990-02-20
Chapman, John
Measuring and testing
Vibration
By mechanical waves
73588, G01N 2900
Patent
active
049015761
ABSTRACT:
Leak detector arrangement for the detection of small openings in car bodies or other enclosures or containers which may permit undesired passage of water, fumes, or other fluids in which phase coded or linearly frequency modulated sound waves are directed towards potential leak areas. The portion of these waves which pass through the leak openings is received, and these signals are processed so as to discriminate these leak signals from other sound waves normally entering the receiver from other parts or from other sources. The discriminated signals are compared with a threshold so as to determine the absence or presence of a leak.
REFERENCES:
patent: 4384489 (1983-05-01), Crutzen et al.
patent: 4603584 (1986-08-01), Bartle et al.
patent: 4719801 (1988-01-01), Blaser et al.
Chapman John
Fogiel Max
Robotic Vision Systems Inc.
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