Process for determining the internal three-dimensional structure

Details Process for determining the internal three-dimensional structure Process for determining the internal three-dimensional structure

1996-02-15

1998-10-27

Hantis, K.

X-ray or gamma ray systems or devices

Specific application

Absorption

378901, G01N 2302

Patent

active

058287230

ABSTRACT:
A non destructive method determines the three-dimensional structure of a body opaque to visible light, by means of radiations from a single body, particularly suitable for parts of a reinforced concrete structure, wherein the distance between the source and the sensitive plate is shorter than that of the prior art, and wherein the labor time at the body site is substantially less than that of the prior art. The steps of the method include, essentially, the following steps: making some previous assumptions, such as the circular shape of cross sections of iron rods within the concrete; placing in front of the body a source having a discrete cross section spaced therefrom a distance sufficiently small for producing on the two-dimensional image, apart from shadows, measurable penumbra zones; radiating the body for obtaining a two-dimensional image wherein shadow zones as well as penumbra zones may be distinguished, and quantifying the radiation influencing such zones; applying a method for measuring the radiation influencing the sensitive sheet following a set of parallel straight lines; and calculating by computer mathematical methods the geometrical arrangement on each plane of the different parts and materials.

REFERENCES:
patent: 4827436 (1989-05-01), Sabersky et al.
patent: 4932753 (1990-06-01), Cohen
patent: 5124914 (1992-06-01), Grangeat

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