CAD Modelling of a Human 3D Child Body

The CAD program RAMSIS was developed for ergonomic formation of car packages. This computer aided resource made it possible to create a real geometric and kinematic model of the human body. By using this model, the designer does not have to think about the posture of a person in a certain situation, because RAMSIS is able to prognosticate the natural estimated posture automatically. Furthermore, it is possible to rate the posture under comfort and health aspects. The research could be made with the male and female body types including the individual adjustment of body height, corpulence and proportion. In addition to this male and female model the body of a child, subdivided in different age groups, was developed and designed. In developing the child model, the first question that has to be clarified is the one about a suitable database. One problem is that most databases provide just values of 50 First by making a literature enquiry the found values of a 50 Another database that was found is the Tanner study (Atlas of children's growth, 1982). In this book the author documents the growth of 54 children by measuring and taking 2 pictures of them each year from the age of 3 and up to the age of 18. Those pictures were scanned into the computer and we imposed the above-mentioned 50 percentile child dummy of the corresponding age. This was done using the stereophotogametric anthropometric measuring program PCMAN which was developed at the institute. In the end those anthropometric data were worked up statistically, so that the reproduction of a real test person was found that was nearly similar to the 50 percentile child. Those measurements were made, as mentioned above, for the age between 3 and 12 yr. In order to provide a 3D child dummy to the constructor to shape the interior of cars ergonomically for children meeting their demands. Relevance to industry RAMSIS is a CAD-tool for ergonomic analysis of vehicles developed for the German automotive industry. Up to now the different RAMSIS types were adults, so it was not possible to make statements on the quality of a car interior from the point of view of children. It was necessary to develop a realistic 3D child model which could be used by the designers for seat and safety analysis on a CAD-system     «

The CAD program RAMSIS was developed for ergonomic formation of car packages. This computer aided resource made it possible to create a real geometric and kinematic model of the human body. By using this model, the designer does not have to think about the posture of a person in a certain situation, because RAMSIS is able to prognosticate the natural estimated posture automatically. Furthermore, it is possible to rate the posture under comfort and health aspects. The research could be made with...     »