Coding optimization for the absolute optical rotary encoder

Ting Feng Wang, Yung Jhe Yan, Hou Chi Chiang, Tsan Lin Chen, Yang-Mang Ou

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    2 Scopus citations

    Abstract

    Precise positioning system is assuming increasing importance. One of Implementation is an optical rotary encoder system which is composed of a fixed light source, a group of photodetectors, and a coding disc. In fact, position resolution is affected with a permutation of coding on the disc. Unstable dc voltage was found from an analog signal transmitted by photoelectric detectors. Setting up a threshold voltage for digital binarization become difficult in this case.In this paper, the limitations, characteristics and operation mode of coding on the disc operation mode arrangement rules of coding on the disc was observed. After collecting the relevant literature, the mathematical sequence named De Bruijn sequence which matches to the arrangement of the above rules and restrictions was found. The desired requirements are summarized and used to filter out the best solution in all solution sets with the designed algorithm. Finally, the characteristics of new and old solutions are compared and discussed.

    Original languageEnglish
    Title of host publication2018 International Automatic Control Conference, CACS 2018
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781538662786
    DOIs
    StatePublished - 9 Jan 2019
    Event2018 International Automatic Control Conference, CACS 2018 - Taoyuan, Taiwan
    Duration: 4 Nov 20187 Nov 2018

    Publication series

    Name2018 International Automatic Control Conference, CACS 2018

    Conference

    Conference2018 International Automatic Control Conference, CACS 2018
    Country/TerritoryTaiwan
    CityTaoyuan
    Period4/11/187/11/18

    Keywords

    • Absolute
    • Coding
    • De Bruijn sequence
    • Optical
    • Optimization
    • Rotary encoder

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