Compact integrated multi-group separated magnetic encoder

Abstract

A compact integrated multi-group separated magnetic encoder of the invention is characterized in that: an encoder with adjustable group number, which is formed by a group or multi-group separated magnetic encoder principles and a hollow magnetic shielding encoder structure, is adopted, and the group number of the encoder can be expanded in a radial space, extremely compact space occupation is achieved while stable output among all groups of encoders can be ensured, thus excellent size can be provided for application scenes with high space requirements, and at the same time, position data withhigh precision and high resolution can be output.

Description

technical field [0001] The patent of the present invention relates to a device for position measurement, especially an encoder device for rotary position measurement. Background technique [0002] When the object rotates, in order to measure the position and motion state of the moving object, an encoder is generally used for measurement. The encoder returns the rotation law and data of the current object, which is provided to the system for analysis and subsequent control. [0003] In principle, encoders have the following categories: photoelectric encoders, magnetic encoders, capacitive encoders, inductive encoders, resolvers, etc.; in terms of structure, they can be divided into two types: shaft end encoders and hollow encoders. [0004] As an emerging technology, magnetic encoders are used more and more in the market, and their excellent anti-interference ability and stability are more and more favored by more products. Moreover, with the continuous growth of semiconduc...

AI Technical Summary

Problems solved by technology

However, general robot joints have more available space in the radial direction, and the axial size directly affects the overall length of the joint. The dual-encoder structure proposed in this patent still has a certain surplus in radial space, and the axial distribution of the dual-encoders The joint length cannot be reached to the extreme, and there is still room for optimization and improvement

[0008] The hollow encoder is different from the shaft end encoder. The hollow encoder must have a unique structure to achieve anti-interference and achieve high precision, high resolution, and magnetic interference resistance. Patent 2019108505346 proposes a method to protect the above-mentioned separate The structural scheme of the magnetic encoder, but this structure is limited to the application of a single encoder. If it is to achieve multiple encoders, the structure needs to be further optimized

Images