Code wheel, rotary encoder, encoding method and device with the encoder

Abstract

The invention relates to a code wheel, a rotary encoder, an encoding method and equipment with the encoder. The code wheel includes a first code track family, and the first code track family includes a plurality of first code tracks. Each first code track includes a plurality of code lines arranged in parallel from a direction close to the center of the code wheel to a direction far away from the center of the code wheel. In each first code track, the included angle between the first connecting line between the center of the circle and the first code line and the second connecting line between the center of the circle and the last code line is a first preset value greater than zero. Among them, the first yard line is the yard line closest to the center of the circle in each first yard lane, and the last yard line is the yard line farthest from the circle center in each first yard lane. By adopting the code disc, rotary encoder, encoding method and equipment with the encoder of the present invention, the angular physical resolution can be improved under the same code disc radius and description process conditions, thereby improving the precision of the rotary encoder.

Description

technical field [0001] The invention relates to a rotation detection technology, in particular to a code wheel, a rotary encoder, an encoding method and equipment with the encoder. Background technique [0002] The so-called encoder is a device that converts a certain physical quantity into a digital format. The function of the encoder in the motion control system is to convert parameters such as position and angle into digital quantities. Mechanisms such as electrical contact, magnetic effect, capacitive effect, and photoelectric conversion can be used to form various types of encoders. The most common encoders used in motion control systems are optical encoders. [0003] Photoelectric encoders are divided into rotary photoelectric encoders and linear photoelectric encoders according to their different uses, which are used to measure the rotation angle and linear dimension respectively. The key component of the photoelectric encoder is the photoelectric encoding device, ...

AI Technical Summary

Problems solved by technology

This encoding method is limited by the radius of the code disc and the characterization process, and the improvement of the angular physical resolution is limited, which brings difficulties to the improvement of the accuracy of the rotary encoder.

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