DOI: 10.5593/SGEM2014/B22/S9.006


R. Radziejewski, J. Markiewicz, D. Zawieska
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-11-7 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 2, 43-48 pp

Projection of appearance and geometry of complicated industrial objects is a complex task, which requires that appropriately scheduled and prepared measurements are performed. Such objects must be accurately inventoried, but their complicated shapes often makes the access to such objects and visibility of their entire surface very difficult. Prepared documentation was often developed in the form of sketches, plans or maps, which were additionally amended by photographic documentation. Visualisation of objects in such a form is often insufficient. Due to the increasing number of industrial objects, as well as technological development, the need to modify methods of inventorying has appeared. Designing of new elements with the use of CAD/CAM tools requires that an object is described in three dimensions. Measurements were initially performed with the use of tacheometers, allowing for obtaining spatial co-ordinates of each point. Such technique required the utilisation of a mirror and involvement of the second person. Zones which are excluded from the possibility of visits by humans often exist within the areas of industrial objects. That is why mirror-less total stations appeared in the market, which allow for contact free measurements. However, measurements lasted too long and they were not cost effective. Basing on this technology a laser scanner was constructed. It automatically measures millions of points [5] and operates much faster than a total station. The terrestrial laser scanning technology produces a three-dimensional description of geometry of scanned objects. The accuracy of measurements performed by the scanner does not differ from the accuracy of measurements performed by precise tacheometers and the speed of measurements reaches about o million of points per second. Integration of laser scanning and digital images allows for creation of a realistic 3D model. Data acquired by means of the laser scanner may serve for inventorying complex industrial objects and for valuable analyses, which could not be performed using conventional techniques. Operating the "cloud of points" includes realistic visualisation and precise measurements in a space transformed to the virtual reality and it is the basis for advanced spatial modelling and reverse engineering [2].

Keywords: terrestrial laser scanning, conditions of industrial objects, modelling industrial elements, deformation of tanks, piping modeling, point cloud