Self-error-correction absolute value encoder data transmission method

Abstract

The invention relates to the field of sensors, in particular to a position data self-correction method in the data transmission process of an encoder and a driver. Comprising the following steps: an encoder converts original position data into a self-error correction code; the driver verifies the self-error correction code; if the verification result of the self-error correction code is correct, the driver recovers the self-error correction code to original position data for transmission; and otherwise, the driver performs error correction and correction on the self-error correction code, and recovers the corrected self-error correction code to the original position data for transmission. According to the invention, the original absolute position data sent by the encoder can obtain the self-error correction capability, even if errors occur, the original data can be recovered through error correction, and the stability of the servo driving system is improved.

Description

technical field [0001] The invention relates to the field of sensors, in particular, to a method for self-correcting position data during data transmission between an encoder and a driver. Background technique [0002] The rapid development of modern industrial equipment such as precision CNC machine tools and industrial robots has put forward higher and higher requirements for servo drive systems. In the servo drive system, the angle encoder, as a position detection device, has an important influence on the accuracy and reliability of the servo drive system. [0003] Existing absolute encoders usually carry a check part when transmitting position data, such as CRC or other check methods. If the check is wrong, the driver discards the data. The disadvantage of this approach is that check methods such as CRC can only find errors, not correct them. Once an error occurs, at least in one communication cycle, the drive will not get the position data fed back by the encoder, res...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of this method is that once the driver and the encoder generate bit errors due to external interference during data transmission, the driver will not be able to obtain accurate absolute position values

Although the absolute position data sent by the encoder last time can be used for program calculations to reduce serious errors caused by bit errors, it will still lead to a decrease in the performance of the servo drive system

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