Surveying of large fusion reactor components

For CAD-supported remote maintenance of fusion machines a surveying system has to measure the geometrical changes of the ractor components. A study of principally applicable techniques indicated that triangulation with theodolites is well suited to update the CAD-models of fusion reactor components. The remote-controlled and CAD-supported surveying system GMS (Geometry Measurment System), developed by KfK, is equipped with two digital theodolites, a laser- and a camera-theodolite, completely controlled by a computer. The data transfer CAD-GMS will be realized with the standardized IGES-interface. Two show the feasibility of this draft a GMS-prototype, equipped with a single camera-theodolite, is built up presently. (author). 10 refs.; 7 figs