Calibration of rotary encoders with different interfaces by means of laser dynamic goniometer

P. A. Pavlov; Yu. V. Filatov; I. B. Zhuravleva

doi:10.1117/12.2573782

10 October 2020 Calibration of rotary encoders with different interfaces by means of laser dynamic goniometer

P. A. Pavlov, Yu. V. Filatov, I. B. Zhuravleva

Proceedings Volume 11552, Optical Metrology and Inspection for Industrial Applications VII; 115520D (2020) https://doi.org/10.1117/12.2573782
Event: SPIE/COS Photonics Asia, 2020, Online Only

Abstract

Rotary optical encoders are widely used in all areas of industry, robotics and special equipment. The accurate measurement of their characteristics is a necessary task for their successful implementation. The report attempts to find a unified approach to determining the accuracy of rotary encoders. The proposed approach is based on statistics, on the reliability of the code, which characterizes the probability that the measured code corresponds to the specified code. To find the reliability of the code, it is necessary to measure angle of the turn using some goniometric device and compare the measured values with the codes of encoder. The report considers the laser dynamic goniometer for determining the error of absolute angle encoders, which allows measurements in a wide range of rotation rates with high accuracy. The measurement is performed at certain moments of time, depending on the electrical interface of the encoder. In the case of a parallel interface, the moments of time are determined by the moment when the code of the encoder changes. This data collection allows to get a General set of data. In the case of an encoder, where the sequential principle of reading the code, it is not possible to receive the General set in a wide range of rotation rates. The report analyzes the situation discussed above in detail. The report presents experimental data obtained on a laser dynamic goniometer and the results of calculating the reliability of the code.

Conference Presentation

Citation Download Citation

P. A. Pavlov, Yu. V. Filatov, and I. B. Zhuravleva "Calibration of rotary encoders with different interfaces by means of laser dynamic goniometer", Proc. SPIE 11552, Optical Metrology and Inspection for Industrial Applications VII, 115520D (10 October 2020); https://doi.org/10.1117/12.2573782

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