Avaliação de peças em um veículo de Formula SAE através de escaneamento 3D de baixo custo

Abstract

3D scanning is a modern method that can be used to assist in the evaluation of projects by engineers, as a complement of reverse engineering of third-party built projects or to measure differences in dimensions between the designed and the manufactured component. However, commercial devices have high financial cost for the reality of most Brazilian university students (both hardware and software), restricting its use for professional sectors outside the scope of university projects with restricted budget as in the case of SAE projects (Formula, Baja or Aerodesign type), which end up not benefiting from the use of 3D scanning to evaluate their projects or assemblies. To elaborate a possible solution, this work proposes the use of Kinect as a low-cost option. For this, a comparison was made between the dimensions obtained from two parts manufactured by the team, and their corresponding values in a drawing scanned by Kinect of the same item. The results obtained showed an average percentage error around 2.55% to 4.36%, in the analyzed components, but having points where the error reached 19.94% (between the real measure and its scanned image), showing that the equipment cannot be considered accurate enough to obtain a satisfactory result (in the margin of 0.1 mm) for more important purposes. As a conclusion, the 3D scanner used proved inadequate to the requirements of this project and it is necessary to test other sensors to find a balance point between cost and benefit in function of each application, as for example, programs for smartphones, which can provide a low-cost proposal and satisfactory answers.