Up-to-date technique for easy high-accuracy position acquisition with sinusoidal incremental encoders
B. Höscheler, László Számel · Repository of the Academy's Library (Library of the Hungarian Academy of Sciences) · 1998
Currently known methods for high-resolution position acquisition with sinusoidal incremental encoders (i.e.VeCon) always require additional hardware components for counting whole cycles, two AID-converters for quantifying the position within the current cycle and a routine for synchronising both information.The presented method uses only the information of the two AID-converters with a relatively simple procedure.The most important fact is that the position may be calculated even at a rotation speed, where the fundamental frequency of the encoder signals exceeds the sampling frequency by a multiple value, so that the sampling theorem may be violated.The paper discusses the development of this technique, the implementation of an additional error detection method, a practical application as well as experimental results.