Void detection in cast metal

Details Void detection in cast metal Void detection in cast metal

1984-06-12

1986-04-15

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

378 58, G01N 2318

Patent

active

045829934

ABSTRACT:
A method of, and apparatus for, detecting voids in or on the surface of cast metal comprises passing a substantially collimated beam of photons through the cast metal, detecting the photon flux emerging from the cast metal with a photon detector, and estimating the size and location of any void present in or on the cast metal from the standard deviation of the output of the photon detector with calculating means.

REFERENCES:
patent: 4393313 (1983-07-01), Calkins et al.
patent: 4415980 (1983-11-01), Buchanan
patent: 4549306 (1985-10-01), Shideler et al.
R. C. Woods and L. P. Kenna, "A New Use for X-Rays in Industry" Electronics (Apr. 1941), pp. 29-31, 89-91.
L. W. Mysovski and G. S. Ismailova, "The Illumination of Metallic Castings by Gamma Rays, With the Object of Detecting Cavities and Other Defects" Reports of the Academy of Sciences of U.S.S.R. [A], (2), (1926), pp. 29-31.
P. Elsip & R. J. Lewis, "Television and Industrial Fluoroscopy", Reprinted from The British Journal of Non-Destructive Testing, vol. 6-No. 1, (1964).
Andrex NDT Systems, X-Ray Imaging Detectors, sales brochure.
Marconi Instruments Limited, sales brochure.

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