Title :
A method of improving the resolution and accuracy of rotary encoders using code compensation technique
Author :
Hagiwara, Nobumi ; Suzuki, Yoshihisa ; Murase, Hideaki
Author_Institution :
Dept. of Electr. Eng., Nat. Defense Acad., Yokosuka, Japan
Abstract :
A method for improving the resolution and accuracy of incremental type rotary encoders using a phase encoding and code compensation system is described. Applying this system to an optical incremental encoder whose scale pitch is 1/36000, a rotation resolution of 1/920000 and a better than ±1/300000 rotation (±0.0012°) precision are obtained. The system can also be used for a precise measurement of speed fluctuation
Keywords :
analogue-digital conversion; angular measurement; compensation; encoding; interpolation; phase measurement; velocity measurement; accuracy; code compensation; interpolation; optical incremental encoder; phase encoding; resolution; rotary encoders; rotating angle measurement; speed fluctuation; Encoding; Goniometers; Interpolation; Linearity; Optical distortion; Phase measurement; Read only memory; Rotation measurement; Signal generators; Signal resolution;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1991. IMTC-91. Conference Record., 8th IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-87942-579-2
DOI :
10.1109/IMTC.1991.161572
