A New Method of Angle Measurement Error Analysis of Rotary Encoders

In this article, a method of error source analysis and detection to improve the angle measurement accuracy of rotary encoders in precision measuring instruments is proposed. The angle measurement error caused by the installation eccentricity of the grating disk and the radial error motion of the rot...

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Bibliographic Details
Published inApplied sciences Vol. 9; no. 16; p. 3415
Main Authors Jia, Hua-Kun, Yu, Lian-Dong, Zhao, Hui-Ning, Jiang, Yi-Zhou
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2019
Subjects
Accuracy
angle measurement error
Calibration
Eccentricity
Error analysis
Error detection
Image processing
Information processing
Installation
instrument
Measurement methods
Measuring instruments
radial error motion
Reading
rotary encoder
Rotating shafts
Sensors
Shaft encoders
Visual system
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Summary:In this article, a method of error source analysis and detection to improve the angle measurement accuracy of rotary encoders in precision measuring instruments is proposed. The angle measurement error caused by the installation eccentricity of the grating disk and the radial error motion of the rotating shaft is analyzed, and the error model is built. The method of measuring the radial error motion is introduced, and the visual system and image processing technology is proposed to detect the eccentricity. The verification experiment by the use of an autocollimator and a polygon is carried out. The residual error after comparison within ±6″ accounts for 9% of the angle measurement error. The proposed error model is verified, and the angle measurement error can be predicted if the installation eccentricity and radial error motion are known.
ISSN:2076-3417
2076-3417
DOI:10.3390/app9163415