Novel Rotary Position Sensor Based on Gray Scale Pattern Disc

Abstract

Absolute rotary angular /position sensors play an important role in various applications and the rapid development of new technologies requires further accurate measurement and control. In this paper, a novel, simple, highly accurate absolute rotary angular/ position sensor is presented. The sensor operation is based on the combination of a circular gradient grayscale and gray code pattern. A simple experiment is done to demonstrate the proof of concept of the proposed sensor. The experimental results show that the proposed absolute rotary angular/position sensor has good linear characteristics with accuracy below ±1° and a resolution of 0.1° within the full measurement range from 0° to 360°. The proposed idea and experimental results can be helpful to design an absolute rotary angular/position sensor to improve its performance of it.