Reconstruction of 3D Models in Automotive Engineering Applications Using Close-Range Photogrammetry Approach
Keywords:digital close-range photogrammetry, 3D modeling design, photogrammetric measurement system
The use of digital close-range photogrammetry techniques is becoming an interesting area in 3D modeling and design. The present study focuses on developing 3D measurement system method for measuring complex shapes by means of quality control assessment and surface inspection, and simulation studies for hard-to-define parts geometries. The idea is to introduce an alternative solution to conventional method of geometry generation, which for use in CAE simulations. Therefore, the main objective of this research is to propose the photogrammetric measurement system on a car model (sedan) using a smartphone camera for the data acquisition procedure. Attempts are made to evaluate the precision and accuracy of the constructed 3D computer model of the car using Autodesk ReCap photogrammetry software. These attempts include the modification of photogrammetric data acquisition procedure and the car exterior geometry. Their photogrammetric products are then outlined clearly by each digital model due to the surface body panel differences. The different model visualizations are shown, where before the car modification is made the produced digital model is imprecise and poorly reconstructed, while after modification the model is more precise and accurate. The photogrammetric 3D car model is used for preliminary thermal behavior analyses. The results highlight the engine hood panel without the polyurethane (PU) foam has the highest surface temperature distribution of 347.65 K (74.65 ?) and panel with PU foam covered show the highest temperature distribution of 294.03 K (21.03?).