Near surface inspection system

Details Near surface inspection system Near surface inspection system

1983-08-25

1985-04-09

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

73627, 376249, G01N 2904

Patent

active

045093695

ABSTRACT:
An ultrasonic transmitter (10) and at least two ultrasonic receivers (12, 16) are mounted on a carrier (18) which traverses the surface (22) of a solid material (24). The sound beam (30) from the transmitter (10) passes beneath the surface (22) and enters a zone of interest disposed about a point (36) located a fixed distance (40) beneath the surface (22). Reflected sound beams (42, 46) emanating from flaws (54, 58, 60) located within the zone of interest are detected by the receivers (12, 16). The orientation and positioning of the transmitter (10) and the receivers (12, 16) for maximizing the detection and differentiation of the detected flaws (54, 58, 60) are also disclosed.

REFERENCES:
patent: 3683680 (1972-08-01), Johnson et al.
patent: 3739628 (1973-06-01), Saglio
patent: 3813926 (1974-06-01), Stubbeman
patent: 4165649 (1979-08-01), Greer, Jr.

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