Title :
A method of improving the resolution and accuracy of rotary encoders using a code compensation technique
Author :
Hagiwara, Nobumi ; Suzuki, Yoshihisa ; Murase, Hideaki
Author_Institution :
Dept. of Electr. Eng., Nat. Defense Acad., Yokosuka, Japan
fDate :
2/1/1992 12:00:00 AM
Abstract :
A method of 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 1/3600 rotation, results in a resolution of up to 1/920000 rotation, and better than ±1/300000 rotation (±0.0012°) precision is obtained
Keywords :
analogue-digital conversion; angular measurement; angular velocity measurement; coding errors; encoding; error correction; interpolation; phase measurement; accuracy; code compensation; interpolation; nonlinearity error; optical encoder; optical incremental encoder; phase encoding; resolution; rotary encoders; scale pitch; Encoding; Goniometers; Interpolation; Optical distortion; Optical pulses; Pulse measurements; Read only memory; Rotation measurement; Shafts; Signal resolution;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
