SearchPublisher and Institutes
You are here: Home :: Area NEM :: Engineering :: Machine construction
M. Chen, G. Frankowski
Calibration Strategy for Optical 3D Coordinate Measuring Machines based on Projected Fringes and Photogrammetric Algorithms
Optical 3D methods of measurement gain more and more importance for industrial measurement technologies. For the measurement, digitization, and rapid prototyping of the 3D shape of parts with large dimensions, e.g. car bodies, photogrammetric measuring devices are used very successfully. More complicated is the situation for the measurement of samples with small dimensions between one millimetre and hundred millimetres. In this case the use of photogrammetric methods is very complicated and in most cases even impossible. The reason is that photogrammetric methods at the moment do not provide the accuracy necessary for the measurement of pieces with such a small dimension. The combination of projected fringes and photogrammetric methods in the same measuring device turn out to be useful for the cases. There is a high measurement accuracy in a single point by means of the photogrammetry while a complete 3D area can be measured by means of the projected fringe method. In order to realize such a measuring strategy it is important to have a calibration concept combining the advantages of the two optical methods.
tm – Technisches Messen, Oldenbourg Wissenschaftsverlag
Print ISSN: 0171-8096
Volume: 69, 05/2002
Pages: 240