New Global Referencing Approach in a Camera-LCD Micro Positioning System
Metadata
Show full item recordEditorial
MDPI
Materia
Accuracy Pattern recognition Position Artificial vision Precision
Date
2020-04Referencia bibliográfica
de Francisco Ortiz, Ó., Ortiz, I., & Bueno, A. (2020). New Global Referencing Approach in a Camera-LCD Micro Positioning System. Sensors, 20(7), 2118. [doi:10.3390/s20072118]
Abstract
In any precision manufacturing process, positioning systems play a very important role
in achieving a quality product. As a new approach to current systems, camera-LCD positioning
systems are a new technology that can provide substantial improvements enabling better accuracy
and repeatability. However, in order to provide stability to the system a global positioning system
is required. This paper presents an improvement of a positioning system based on the treatment
of images on an LCD in which a new algorithm with absolute reference has been implemented.
The method is based on basic geometry and linear algebra applied to computer vision. The algorithm
determines the spiral center using an image taken at any point. Consequently, the system constantly
knows its position and does not lose its reference. Several modifications of the algorithm are proposed
and compared. The simulation and test of the algorithm provide an important improvement in the
reliability and stability of the positioning system providing errors of microns for the calculation of
the global position used by the algorithm.