Decoding circuit of Manchester encoding of Tamagawa encoder

Abstract

The invention discloses a decoding circuit of Manchester encoding of a Tamagawa encoder which employs a programmable logic device to realize the decoding circuit of Manchester encoding of the Tamagawa encoder. The programmable logic device at least comprises a synchronization head detection unit, an enable signal generation unit, a decoding unit of Manchester code, a synchronous clock extraction unit, a series-parallel conversion unit, a CRC calibration unit, a data register group unit and a parallel interface unit. The decoding circuit provided by the invention can replace the existing special conversion chip, and employs the programmable logic device to realize the processing like decoding, series-parallel conversion, CRC calibration, data separationand the like of Manchester encoding of the Tamagawa encoder and is characterized by flexible design, high reliability strong practicabilityand the like. The circuit can be used in communication technology, signal processing, servo control and other fields, realizes detection and processing of the Tamagawa encoder signal, and has a great practical application value.

Description

technical field [0001] The invention relates to the fields of communication technology, signal processing and the like, in particular to a decoding circuit for Manchester encoding of a Tamagawa encoder. Background technique [0002] With the rapid development of modern industry, industrial equipment such as precision CNC machine tools and industrial robots have put forward higher and higher requirements for servo drive systems. As the most commonly used position detection link in the servo drive system, the photoelectric encoder is absolutely unique for each position determined by the mechanical position, has strong anti-interference performance, is easy to remember and save, and can directly read out the absolute position information without accumulation Error, high data reliability, widely used in angle, length measurement and positioning control in various industrial systems, such as CNC machine tools and robots and other occasions with relatively high precision requireme...

AI Technical Summary

Problems solved by technology

For this reason, the decoding board of the client needs to design the circuit according to the custom communication protocol of Tamagawa Company and the AU5688 special conversion chip, such as using 26LS32 as the intermediate interface circuit with the conversion chip, which makes the circuit design complicated; and the AU5688 special conversion chip usually costs Expensive, its price is about a quarter of the price of the entire absolute encoder, which increases the development cost to a certain extent

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