Measuring and testing – Vibration – By mechanical waves
Patent
1973-12-07
1979-02-06
Kreitman, Stephen A.
Measuring and testing
Vibration
By mechanical waves
73628, G01N 2904
Patent
active
041377796
ABSTRACT:
A method of determining depth propagation of a defect in a body by ultrasonic materials testing wherein a first angle probe having an ultrasonic wave transmitting oscillator produces a scatter signal at structural inhomogeneities of a body formed with a defect and the scatter signal is received by an ultrasonic wave receiving oscillator of a second angle probe, which includes: transmitting an ultrasonic wave at a first angle along a first line in direction towards the defect so that the scatter signal thereat is shadowed by the defect and diminished in intensity; receiving the diminished signal from the defect at a second angle in a direction along a second line intersecting with the first line at a defect, transmitting additional ultrasonic waves and receiving diminished scatter signals along respective lines intersecting at the defect at varying depths of the body and ascertaining the depth propagation of the defect by a marked increase in intensity of the received signal when the intersection of the respective lines along which the ultrasonic wave is transmitted and the scatter signal is received reach beyond the innermost limit of the defect.
REFERENCES:
patent: 2628335 (1953-02-01), Drake
patent: 2799157 (1957-07-01), Pohlman
patent: 2912854 (1959-11-01), Schubring
patent: 2995925 (1961-08-01), Worlton
patent: 3332278 (1967-07-01), Wood et al.
patent: 3572099 (1971-03-01), Wieczorek
patent: 3592052 (1971-07-01), Giacomo
patent: 3608352 (1971-09-01), Walton
patent: 3687219 (1972-08-01), Langlois
Schulz Eduard
Wustenberg Hermann
Kraftwerk Union Aktiengesellschaft
Kreitman Stephen A.
Lerner Herbert L.
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