Recent Patents on Magnetic Encoder and its use in Rotating Mechanism

Abstract

Background: The application of magnetic encoder relieves the problem of reliable application of servo system in vibration field. The magnetic encoder raises the efficiency and reliability of the system, and from structural considerations, the magnetic encoder is divided into two parts: signal conversion and structural support. Objective: In order to improve the accuracy of the magnetic encoder, its structure is constantly improving. To evaluate a magnetic encoder, the accuracy is a factor, meanwhile, the structure of magnetic encoder is one of the key factors that make difference in the accuracy of magnetic encoder. The purpose of this paper is to study the accuracy of different structures of magnetic encoder. Methods: This paper reviews various representative patents related to magnetic encoder. Results: The differences in different types of magnetic encoders were compared and analyzed and the characteristics were concluded. The main problems in its development were analyzed, the development trend forecasted, and the current and future developments of the patents on magnetic encoder were discussed. Conclusion: The optimization of the magnetic encoder structure improves the accuracy of magnetic encoder. In the future, for wide popularization of magnetic encoder, modularization, generalization, and reliability are the factors that practitioner should pay attention to, and more patents on magnetic encoder should be invented.