Measurement uncertainty evaluation of optical multi-sensor-measurements

► Accurate results for in-line measurements instead of rough external conditions are enabled. ► Rework in extruding productions can be reduced by 10% of the whole output amount. ► The improved results can be used for controlling the process parameters by external connection. ► The data fusion for optical metrology by merging scalar 1D and 2D data has been realized. ► The corresponding algorithms are fast, robust and modular designed for the use in similar systems. Optical coordinate metrology facilitates the set-up of in-line applications for quality inspection in shop floor for a variety of products. Yet, for situations with high requirements it is not possible to fulfill all demands by devices based on a single measurement principle. To enable high measurement rates and as well as precise and contact-less data acquisition, a combination of subsystems with different principles and properties has to be implemented. To assure the fitness of an optical multi-sensor-measurement system combining a shadow system and a light-section system for the in-line inspection of concave extruding profiles, an experimental measurement uncertainty analysis has been performed. To this aim, a prototype is set-up and the effect of typical environmental influences like dust, object’s vibrations, the illuminations’ pitch error or extraneous light, is examined. Subsequently, the measurement system is evaluated under shop floor conditions and the results are analyzed.