1 An Attempt at Using a Terrestrial Laser Scanner for Detecting Minimal Displacement and Objects ’ Deformations

Key words: terrestrial laser scanner, minimal detected movements SUMMARY Observations of geodetic market and new measuring instruments show that the difference in the accuracy of measurements with instruments which use the reflector and the reflectorless ones disappears. The range of reflectorless measurements is still shorter then those with the use of prism but the possibility of recording inaccessible places is, without doubt, an advantage of reflectorless instruments. Laser scanners may serve as an example of such instruments which for a few years have been in the scope of interest of engineers all over the world. The aim of this paper is to compare the displacement of the High Definition Survey targets measured with a terrestrial laser scanner assigned to intended intervals. The displacement was search for three directions (X,Y,Z coordinate axes). The experiment was conducted for five different intervals (0,001m, 0,003m, 0,005m, 0,010m, 0,020m) and several distances finally reaching the maximum range of the scanner. The data was processed using Cyclone and Matlab software and compared to theoretical intervals. The analysis of the obtained result