Establishing A Object's Numerical Model Using RE Technique

This paper summarizes the author's work in the study of "Establishing a Object's Numerical Model using RE(Reverse Engineering) Technique" and systematically illustrates the whole process of establishing a numerical model.At first, the paper introduces the conception of RE technique, its development in the world and the main application, then points out the significant meaning of researching RE technique. Secondly, methods of data measure are explained in RE including three-dimensional measure machine method, raster method, laser triangle method, CT scan and NMR method and automatic section scan method. Advantages disadvantages and application areas of each method are showed simultaneously. Thirdly, two kinds of softwares Surfacer and UG used in the paper are educed after comparing the popular softwares throughout the world used in RE and Surfacer is emphasized. Theories used in surface reconstruction are summaried including mathematical expressions of different free curves and surfaces and general methods of surface building from curves. Critical techniques in the post treatment of RE including the registration of point data, feature extraction and region division of point clouds are expatiated in detail from theoretical and practical aspects. It deserves pointing out that the author has done further research in grouping point clouds. BP neural network is introduced to classify point clouds and it is proved to be a feasible method. Then an example of point clouds of mobile phone shell is given to show the whole process of surface reconstruction. At last, RP(Rapid prototyping) technique is introduced and the mobile phone shell is manufactured by the RP machine.