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Articles | Volume XL-5/W5
https://doi.org/10.5194/isprsarchives-XL-5-W5-117-2015
https://doi.org/10.5194/isprsarchives-XL-5-W5-117-2015
09 Apr 2015
 | 09 Apr 2015

PRECISE LASER-BASED OPTICAL 3D MEASUREMENT OF WELDING SEAMS UNDER WATER

T. Ekkel, J. Schmik, T. Luhmann, and H. Hastedt

Keywords: Calibration, Camera, Multi-Media, Optical, Photogrammetry, Tracking, Underwater

Abstract. This paper deals with the development of a measuring procedure and an experimental set-up (stereo camera system in combination with a projecting line laser and a positioning unit) which are intended to detect the surface topography, particularly of welds, with high accuracy in underwater environments. The system concept makes provision for the fact that the device can be positioned in space and manipulated by hand. The development, optimization and testing of the system components for surface measurements as well as calibration and accuracy evaluations are the main objectives within this research project. Testing procedures and probes are constructed and evaluated to verify the results. First results will be shown, where the test objects are underwater. The development considers conditions for a future adaption to underwater use.