Measuring and testing – Vibration – By mechanical waves
Patent
1979-09-07
1981-03-31
Kreitman, Stephen A.
Measuring and testing
Vibration
By mechanical waves
346 33F, G01N 2904
Patent
active
042585732
ABSTRACT:
Method and apparatus for in line ultrasonic inspection of linearly extending brazed composite workpiece including a linearly extending bonded region, traveling linearly at a given speed. A source of ultrasonic signals is focussed on the workpiece and is reciprocated in the plane of the workpiece in a sweep transverse to the direction of workpiece travel, the sweep being at least commensurate with the width of the bonded region. The signals reflected from the workpiece are received and processed to derive control signals, which are input to a marker. The marker is reciprocated in phase with the reciprocation of the signal source. A linearly extending record medium is moved past the marker transversely to the reciprocation of the marker at a speed not greater than one-half the workpiece speed, whereby the marker traces successive generally parallel strokes against said record medium. The resulting record gives a useful representation of the condition of the entire bonded region, allowing the bonding conditions to be correct during production.
REFERENCES:
patent: 2836059 (1958-05-01), Beaujard et al.
Checon Corporation
Kreitman Stephen A.
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