Measuring and testing – Vibration – By mechanical waves
Patent
1980-03-03
1982-03-16
Kreitman, Stephen A.
Measuring and testing
Vibration
By mechanical waves
310335, G01N 2900
Patent
active
043194907
ABSTRACT:
A plurality of flat or curved, wedge-shaped elements form the surface of a ens of an ultrasonic inspection transducer. The multiple wedge-shaped elements permit the ultrasonic energy from the transducer to be focused (1) in a substantially straight line (line focus) parallel to the axis of the lens and (2) deflected from a plane parallel to the wedge-shaped elements and at an oblique angle to the line focus. This achieves a concentration of ultrasonic energy along a line that can be projected into material as shear waves while maintaining equidistance from the transducer's sensing wafer. This results in a concentration of ultrasonic energy that can detect small cracks in a workpiece. Further, with this lens, wider ultrasonic scan may be made with minimal errors in detection. This lens also provides accurate location information on depth of flaws. Furthermore, the novel lens is the only known shape that can achieve reduced errors, wide transducer scan, accurate depth location information and small crack detection of circumferential cracks in tubular shaped products as well as cracks oriented parallel to the direction of scan in flat plates. The same concept can be used on a flat lens (rather than curved cylindrical) with straight multiple wedge elements to minimize errors of flaw detection and identification of flaw location in flat and tubular workpieces while maintaining a wide path of scan.
REFERENCES:
patent: 3283264 (1966-11-01), Papadakis
patent: 3924453 (1975-12-01), Clark et al.
patent: 4044273 (1977-08-01), Kanda et al.
patent: 4084582 (1978-04-01), Nigam
Edelberg Nathan
Erkkila A. Victor
Gibson Robert P.
Kreitman Stephen A.
The United States of America as represented by the Secretary of
LandOfFree
Multiple wedge element lens for an ultrasonic inspection transdu does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiple wedge element lens for an ultrasonic inspection transdu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple wedge element lens for an ultrasonic inspection transdu will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1637113