Calibration method, device and system of rotary encoder

Abstract

The invention discloses a calibration method of a rotary encoder. The calibration method comprises the following steps: controlling a servo motor to drive a motor of a to-be-calibrated encoder to rotate; wherein a motor shaft of the motor is fixedly connected with a code disc of an encoder to be calibrated; when the motor reaches a constant-speed rotation state, code disc position data of the to-be-calibrated encoder is read once every preset time length; determining theoretical position data corresponding to the coded disc position data according to the rotating speed and the preset duration of the state that the servo motor drives the motor to rotate at a constant speed; and determining the calibration amount of the encoder to be calibrated according to the theoretical position data and the code disc position data. According to the invention, when the to-be-calibrated encoder is in the constant-speed rotation state, the position data of the code disc is read, the theoretical position data is derived based on the rotation speed and the rotation duration, and finally the calibration amount of the to-be-calibrated encoder is determined; the calibration difficulty is reduced; and high-precision calibration is realized. The invention also provides a calibration device and system of the rotary encoder, which have the above beneficial effects.

Description

technical field [0001] The present invention relates to the technical field of encoders, and in particular, to a calibration method, device and system of a rotary encoder. Background technique [0002] The encoder is a kind of sensing device that converts the rotational displacement into a series of digital pulse signals to realize position measurement; the encoder is widely used in the fields of electromechanical control and engineering control due to its high measurement accuracy. [0003] The encoder must be calibrated before leaving the factory, thereby reducing the position measurement deviation and improving the measurement accuracy; the calibrated encoder is only shipped to the end customer for use. At present, there are various calibration methods for encoders, but they often require the help of more complex calibration tools. On the one hand, it will increase the calibration cost of the encoder. Difficulty in calibrating the encoder. SUMMARY OF THE INVENTION [...

AI Technical Summary

Problems solved by technology

At present, there are various calibration methods for encoders, but they often need to use more complicated calibration tools. On the one hand, the calibration cost of the encoder will be increased, and on the other hand, the calibration tools themselves are also required to be higher in accuracy, thereby increasing the Encoder Calibration Difficulty

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