Representing Surfaces in Reverse Engineering Using Analogue Signals

Reverse engineering is the process of reconstructing a computer model for physical objects based on 3D data points captured from the surface of the object. This work presents a low end and extremely cost effective technique for representing free-form surfaces of physical objects in a CAD model. An analogue signal was used to acquire the free-form surface data unlike conventional methods like laser scanners or Coordinate Measurement Machines (CMM). The examined surface was scanned using a Linear Variable Differential Transducer, (LVDT) as position sensor for measuring the data from the surface of the object. The analogue signal of the LVDT was acquired through a data acquisition system in a continuous fashion to PC. Solid-Works CAD/CAM software was used to obtain the free-form surface from the acquired 3D data using spline technique.

Autorentext

Ibrahim Eldeeb, demonstrator at Tanta University, Faculty of Engineering, Egypt, since 2006 in the department of Production Engineering and Mechanical Design. Ph.D student at Moscow State University of Mechanical Engineering, Russian Federation, since 2015.