Ultrasonic reference standard and the methods of construction an

Details Ultrasonic reference standard and the methods of construction an Ultrasonic reference standard and the methods of construction an

1978-04-21

1979-11-06

Ciarlante, Anthony V.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01N 2904

Patent

active

041731395

ABSTRACT:
A reference standard for calibrating ultrasonic flaw detection test equipment and the like. The standard comprises a substantially solid body having at least one surface adapted to be engaged by the test equipment and a void of known dimensions located within the body at a known distance from the test equipment engaging surface. The standard may be constructed of two or more substantially solid bodies, at least one of which contains an aperture of known dimensions, and at least one of which is of known length and contains a surface adapted to be engaged by the test equipment, the bodies being diffusion bonded together to substantially eliminate the bond line such that the aperture forms a void of known dimensions within the substantially solid body at a known distance from the equipment engaging surface. In one embodiment, test equipment may be dynamically calibrated by rotating the standard about its longitudinal axis to produce a dynamic calibrated signal. The void formed within the standard by the aperture may be filled with an inclusion representing material to realistically modify the ultrasonic reflectance and attenuation characteristics.

REFERENCES:
patent: D149117 (1948-03-01), Funfrock
patent: D221601 (1971-08-01), Markarian
patent: 2467301 (1949-04-01), Firestone
patent: 3169393 (1965-02-01), Stebbins
patent: 3754472 (1973-08-01), Dory
Paton, "Proceedings of the ARPA/AFML Review of Quantitative NDE", 7/17/75, pp. 89-105.
Tittmann et al., "A Technique for Studies of Ductile Fracture in Metals Containing Voids or Inclusions", 2/24/76, pp. 320-323, vol. 7A.
Art-Vue, Inc., Gifts & Decor Access, p. 217.

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