Coaxial direct-coupled ultrasonic probe and method of non-destru

Details Coaxial direct-coupled ultrasonic probe and method of non-destru Coaxial direct-coupled ultrasonic probe and method of non-destru

1981-03-12

1983-08-09

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

73624, G01N 2904

Patent

active

043971865

ABSTRACT:
An improvement to ultrasonic probes useful in the non-destructive testing of structural materials includes a compact, high-sensitivity coaxial design probe. The probe has a centrally located transmitter point and a circumferentially arranged receiver ring. The geometrical relationship between the transmitter point and the receiver ring provides for high-sensitivity in the detection of defects and allows for a compact construction without orientational sensitivity. A receiver tube is provided which encloses the probe and acts as a tuned wave guide for the detection of ultrasonic vibrations from the structural material under test. The increased sensitivity of the improved ultrasonic probe is advantageous in the testing of non-metallic structural materials having a complex composite structure. The compactness of the improved ultrasonic probe is advantageous in the testing of structural materials having complex and narrow shapes. The improved probe includes a transmitter assembly slidably mounted inside a receiver tube and spring biased to project from the receiver tube. The receiver tube includes an internally mounted separator wall which is acoustically coupled to a receiver transducer so that the receiver transducer is mounted behind the transmitter assembly.

REFERENCES:
patent: 2458771 (1949-01-01), Firestone
patent: 2601779 (1952-07-01), Firestone
patent: 2784325 (1957-03-01), Halliday et al.
patent: 2989864 (1961-06-01), Bamford
patent: 3320796 (1967-05-01), Darby
patent: 3958450 (1976-05-01), Kleesattel

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