Coder interface testing device based on Nios II processor

Abstract

The invention discloses a coder interface testing device based on a Nios II processor. The device comprises an FPGA (Field Programmable Gate Array) chip, an incremental TTL (Transistor Transistor Logic) interface module, an incremental sine and cosine interface module, an absolute interface module, a display screen and a PS (Poly Styrene) / 2 interface device, wherein the incremental TTL interface module, an incremental sine and cosine interface module, an absolute interface module, a display screen and a PS / 2 (Purple Green) interface device are connected with the FPGA chip; the incremental TTL interface module is used for being connected with the coder of an incremental TTL interface type, the incremental sine and cosine interface module is used for being connected with the coder of an incremental sine and cosine interface type, the absolute interface module is used for being connected with an absolute coder so that a serial digital signal output by the absolute interface module is transformed between a differential signal and a single-end signal, and the FPGA chip comprises a Nios II processor embedded in a chip, and the Nios II processor is used for processing an input signal and realizing the testing of coder interfaces. The Nios II processor-based coder interface testing device can be used for solving the problems that the coder interfaces in the existing coder testing platform can not be mutually compatible and are inconveniently carried, and has the characteristics of low cost, strong function, small volume, compact structure and high integration.

Description

technical field [0001] The invention belongs to the field of encoder detection, and in particular relates to an encoder interface testing device, which is used for encoder interface signal testing in a numerical control system. Background technique [0002] In the numerical control system, the encoder is the core functional component of the measurement system, which can be divided into incremental encoders and absolute encoders according to different working principles. The incremental encoder converts the displacement into a periodic electrical signal, and then converts the electrical signal into a counting pulse, and uses the number of pulses to represent the magnitude of the displacement. Each position of the absolute encoder corresponds to a certain digital code, and its indication is only related to the starting and ending positions of the measurement. The incremental encoder interface types include 1Vpp sine-cosine pulse and TTL level pulse, while the absolute encoder...

AI Technical Summary

Problems solved by technology

[0006] The invention provides an encoder interface testing device based on a Nios II processor, which solves the problem of incompatible encoder interfaces and inconvenient portability in the existing encoder testing platform, and has the advantages of low cost, strong function, small volume and compact structure , high integration characteristics

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