REAL-TIME POSITIONING OF MOVING-OBJECTS BY DYNAMIC TARGET TRACKING

Positioning and navigation of construction machines are one aim in the Special Research Center on "High Precision Navigation", an interdisciplinary project at the university of Stuttgart (FRG). The positioning is done by a system of several electronic cameras containing lateral effect photodiodes in the image planes. Two modes of measurement are described: With a minimum of two fixed cameras the positioning is possible in a limited working space. The elimination of reflections along with system calibration leads to a high accuracy in object space of at least 1:10000. As an example the dynamic survey of an industrial robot is presented. With electronic cameras mounted on a motorized theodolite the system works as a highly precise dynamic surveying robot for guidance of machines on construction sites. This system is a powerful dynamic measurement tool in competition with CCD-cameras-based systems and works already with small desktop computers.