Documento de conferencia

Development of a Robust and Accurate Positioning System in Micromachining Based on CAMERA and LCD Screen

Conference Proceeding cp
Procedia Engineering
  • Volumen: 132
  • Fecha: 01 enero 2015
  • Páginas: 895-902
  • ISSN: 18777058
  • Tipo de fuente: Ponencia
  • DOI: 10.1016/j.proeng.2015.12.575
  • Tipo de documento: Documento de conferencia
  • Editorial: Elsevier Ltd
© 2015 The Authors. Published by Elsevier Ltd. In this proceeding, a positioning system based on a camera-screen control in micromachining has been developed. With this control system, the position of the cutting tool with respect to the workpiece coordinate system during a machining operation, has been controlled by an artificial vision algorithm. The positioning system consists of setting a path of target positions, each defined in the form of lighted LEDs on a smartphone, in order to capture them by a camera. As a result, each LED has been magnified and turned into a set of pixels due to the higher resolution of the camera. Afterwards, the developed artificial vision algorithm has used a filtering method to detect the pixels with weighted intensity values over a given threshold. The quality of the micro-machining positioner has been proved by means of two calibration tests: Back-step Test without the use of artificial vision, and an Artificial Vision Test using the camera-screen control system. The results demonstrate that the use of a screen-camera closed loop control system provides appropriate accuracy in positioning the workpiece in a micro-machine tool.

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