Wide bore rotary encoder

Abstract

It is a large-diameter rotation coder, which comprises the following: a mounting ring with matching size to the rotation parts; a grating rule stick on the circle range more than 180 degrees in outside of the mounting ring; a zero mark located on the mounting ring on one end of the grating rule; first reader probe and second reader probe relative to the mounting ring fixed on the parts, wherein, the said first reader probe and second reader probe output end is connected to the reader through process circuit.

Description

technical field [0001] The invention relates to an encoder, especially a large-diameter rotary encoder, which is suitable for measuring the rotation angle of rotating parts with any shape and size, and is especially suitable as a large-diameter, high-precision position sensor. Background technique [0002] Rotary motion is used in many electromechanical systems, such as: wheel discs, wafer handling, machine tool rotary axes, angle testers, etc. Due to the introduction of mechanical vibration and noise during the transmission process, these will affect the accuracy of the entire system. Therefore, a rotary encoder is usually used as a position sensor, and the feedback information of the rotational position is introduced through the position closed loop to continuously correct the relationship between the controlled value and the input value. The deviation between them can improve the system accuracy. [0003] Optical encoders have become one of the most commonly used positio...

AI Technical Summary

Problems solved by technology

However, for large-diameter rotary encoders with a diameter greater than 400mm, there is no circular encoder product in the domestic and foreign markets.

Only the early method of wrapping and pasting can be used, but for some high-precision situations, especially those that need to measure continuous rotation, the error caused by the "blind zone" of the reading is unacceptable

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