Patent ID: 11954848
Assignee: TIAMA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 20:
21. An installation for automatically measuring linear dimensions of at least one region to be inspected of manufactured objects of a series, the installation including:
a device for transporting the objects in a direction materialized by a displacement vector (T), along a rectilinear trajectory in a conveying plane (PC), the objects traveling through an conveying volume (Vt) extending in the direction of displacement (T);
at least one focal point (Fj) of an X-ray generating tube located outside the traversed volume (Vt), and creating a divergent X-ray beam directed to pass through at least one region to be inspected of the object, each focal point being arranged on a same base straight line parallel to the direction of displacement (T) along a rectilinear trajectory;
image sensors (Ci, Cik), located outside the conveying volume (Vt) so as to receive X-rays derived from an associated focal point (Fj), the focal point(s) (Fj) and the image sensors (Ci) being disposed such that each image sensor receives the radiographic projection of the region to be inspected by the rays derived from the focal point (Fj) when the object passes through these rays, the directions of projection of these radiographic projections being different from each other;
an acquisition system connected to the image sensors (Ci, Cik), so as to acquire for each object during its displacement, a set of one-dimensional processing radiographic images, the set including:
said one-dimensional processing radiographic images for a number (NK) of distinct section planes (Pk) containing the base straight line;
for each distinct section plane (Pk), a number (NP) of said one-dimensional processing radiographic images (Spk) of the region to be inspected, obtained along at least three different directions of projection (Dijk) in the section plane;

a computer system configured:
for each distinct section plane (Pk), to determine a delineation of the object in the considered section plane (Pk), from said one-dimensional processing radiographic images (Spk) obtained along the at least three different directions of projection (Dijk) in the section plane.