Four-reading-head digital signal decoder for steel ring encoder

Abstract

The invention discloses a four-reading-head digital signal decoder for a steel ring encoder, relates to the field of signal processing of high-accuracy encoders, and aims to solve the problems of poor structural flexibility, poor program transportability, incapability of being compatible with a plurality of protocols and incapability of eliminating angle measurement errors in an existing decoder. In the four-reading-head digital signal decoder, a microprocessor unit reads an encoder protocol parameter from an electrically erasable programmable read-only memory (EEPROM) and writes the encoder protocol parameter into a logical processor unit; the logical processor unit selects an encoder reading head interface and a decoding way according to the encoder protocol parameter, and acquires encoder data of a corresponding encoder reading head and decodes the encoder data at the same time; the microprocessor unit reads decoded encoder data and performs mean processing on the decoded encoder data to obtain synthesized encoder data; and the microprocessor unit transmits the synthesized encoder data to a servo controller, and transmits the encoder data and the synthesized encoder data to a liquid crystal display screen for real-time displaying. The four-reading-head digital signal decoder has the advantages of flexible protocol, high program transportability, high angle measurement accuracy and high universality.

Description

technical field [0001] The invention relates to the technical field of high-precision encoder signal processing, in particular to a four-reading-head digital signal decoder of a steel ring encoder. Background technique [0002] With the development of precision machinery, the position positioning accuracy of the mechanical system is required to be higher and higher. The position positioning accuracy is not only closely related to the control algorithm, but also depends on the feedback accuracy of the position sensor. For example, in the large-aperture telescope control system (the control system includes a servo controller, a liquid crystal display, a steel coil encoder (incremental encoder, absolute encoder and other components)), in order to improve the tracking accuracy of space targets, The position sensor usually adopts a large-diameter steel ring encoder, and the eccentricity of the steel ring encoder during mechanical installation will cause a large reading error. ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in existing decoders such as poor structural flexibility, weak program portability, incompatibility with multiple protocols, and inability to eliminate angle measurement errors, the present invention provides a four-reading head digital signal decoder for steel ring encoders. Meet the high-precision position detection needs of large-aperture telescope steel ring encoders

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