SSI (Small Scale Integration) data transmitter for rotary encoder based on CPLD (Complex Programmable Logic Device)/FPGA (Field Programmable Gate Array)

Abstract

The invention discloses an SSI (Small Scale Integration) data transmitter for a rotary encoder based on a CPLD (Complex Programmable Logic Device) / FPGA (Field Programmable Gate Array), which adopts the CPLD / FPGA as a basic hardware platform and mainly comprises an RD (Resistance discharge) controller, an SSI communication interface, an FIFO (First In First Out) and an RD decoder. The SSI data transmitter has the advantages that the characteristic information of the descending edge, the ascending edge, the high-low level duration time and the like of an SSI synchronous clock for the rotary encoder can be automatically detected; the absolute type parallel data of the angular displacement information output by a rotary transformer can be directly converted into the serial mode of the SSI interface for an industrial encoder to be transmitted; and the SSI data transmitter provides a new method for realizing the application of the SSI interface by the rotary encoder on industrial site.

Description

technical field [0001] The invention is an SSI (Synchronous Serial Interface) data transmitter for resolver encoders based on CPLD (Complex Programmable Logic Device) / FPGA (Field Programmable Gate Array), and is mainly oriented to the detection of parameters such as rotational speed and angular displacement at industrial sites. The angular displacement information from the resolver dedicated decoder chip (RD decoder) can be received through the RD controller, and the information can be sent out in the form of industrial SSI. Background technique [0002] The output signal of the resolver is an orthogonal sine-cosine analog angular position signal. Usually, a dedicated resolver signal decoding chip (RD chip) is required to convert the analog signal into absolute digital information. At the same time, the RD chip often requires a controller output control timing to work properly. The general RD decoding chip has incremental signal output, parallel output and serial output, an...

AI Technical Summary

Problems solved by technology

However, resolver encoders generally do not have an SSI communication interface, and current encoder suppliers do not provide such interface converters, which has caused great troubles in practical applications and limited absolute encoders to a certain extent. Applications

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