CAD system use for photogrammetric measurements of Agip's offshore structures

Moreno Rampolli; Egidio Bonora

doi:10.1117/12.2294288

1 August 1990 CAD system use for photogrammetric measurements of Agip's offshore structures

Moreno Rampolli, Egidio Bonora

Proceedings Volume 1395, Close-Range Photogrammetry Meets Machine Vision; 139519 (1990) https://doi.org/10.1117/12.2294288
Event: Close-Range Photogrammetry Meets Machine Vision, 1990, Zurich, Switzerland

Abstract

The dimensional control of Agip's offshore structures by means of photogrammetry is foreseen during the structure's construction or at the prefabrication yard. The purpose of this check is to ascertain whether the parts have been built in correspondence to the design's dimensions. It can be achieved through the calculation of diameters, center distances, angles. The photogrammetric process determines the coordinates of a certain number of points readable on the surface of the structural component. Agip's control procedure involves, first of all, processing of these coordinates by means of software program in order to determine the mean radius and the pipe axes directions. Afterwards the coordinates are again processed, this time by means of the Cad system, where the "as built" model will be compared with the theoretical model, previously filed during the design processing. The comparison between the two models allows the detection of any discrepancies and their possible correction.

Citation Download Citation

Moreno Rampolli and Egidio Bonora "CAD system use for photogrammetric measurements of Agip's offshore structures", Proc. SPIE 1395, Close-Range Photogrammetry Meets Machine Vision, 139519 (1 August 1990); https://doi.org/10.1117/12.2294288

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