Desarrollo de un sistema automático para el control de calidad de productos terminados, mediante un scáner 3D realizado con técnicas de visión artificial y tecnología Kinect.

Abstract

An authomatic system was developed in order to control the quality of the final products. This system was designed through the use of a 3-D scanner and the artificial and Kinect technology at the Ingenieria Electronica en Control y Redes Industriales (EIE-CRI) of the Escuela Superior Politecnica de Chimborazo. The most suitable architecture was designed to locate the receiving equipment and to have an entire copy of the object. A connection between the PC and the system is established through a serial port and the use of the Arduino microcontroller. A scale model was designed and implemented according to the scale of the process of the quality control of an industry. This industry consist on a transport conveyor activated by a 24 volts engine, Voltage of Continuos Current (VDC), servo motor of 5 volts Continuos Current (VDC) to depose the products in bad conditions, optical sensor to detect if the object is within the scanner, two Kinect sensors to scan the ceramic mugs, control board to active and desactivate the whole system of the 3-D scanner. The algorithm of this scanner was programmed in the language C++ was applied, working together with the libraries of artificial vision like: Open CV and Libfreenect. The device Kinect acts a scanner allowing to get the characteristics that an object presents. After that, it is compared with a designed model and finally it decides if the product is of good or bad quality, it also consist on a plotted interface per computer that shows data of the state of the product like: area, position and amount of samples. The scanner receives 100 scenes of the ceramic mug per day in order to determine the performance of the system. It takes 10% of the samples and gives the margin of ± 1.13. In conclusion, the system works in an efficient way and presents a low degree of error. A suggestion for the Empresa Ceramica Andina is to implement the scanner totally covered so it does not have any light influence that will affect its optimal performance.