Novel double-speed coarse and fine combination system for resolver-to-digital converter

Abstract

The invention relates to a simple, quick and accurate method which is specially used for a double-speed coarse and fine combination system for a resolver-to-digital converter and realizes coding error correction by using a pure hardware circuit, in particular to a novel double-speed coarse and fine combination system for a resolver-to-digital converter. The novel double-speed coarse and fine combination system for the resolver-to-digital converter is characterized in that a double-speed rotary transformer directly inputs data to the coarse and fine resolver-to-digital converter (RDC), so that coarse data and fine data are respectively obtained; when the coarse data and the fine data are combined together by a velocity ratio, error correction of the coarse data and the fine data is realized through an error correction circuit, the error-corrected data are then combined with the fine data, and a digital output of the double-speed coarse and fine combination system of the resolver-to-digital converter is formed by three-state latching. During coarse and fine combination, an error correction problem is a key problem of the double-speed coarse and fine combination system for the resolver-to-digital converter. The error correction circuit realizes error correction of the coarse data and the fine data through a digital circuit, the error-corrected data are then combined with the fine data, the digital output of the double-speed coarse and fine combination system for the resolver-to-digital converter is formed by the three-state latching, and an enable control end controls the output state of an effective bit data output.

Description

technical field [0001] The invention relates to the technical field of shaft-angle digital converters, in particular to a coarse-fine combination system of a double-speed shaft-angle digital converter. Background technique [0002] The axis angle digital conversion circuit is widely used in high-precision numerical control systems, such as robot control, industrial control, weapon fire control and inertial navigation. With the improvement of the accuracy requirements of the numerical control system, the shaft angle test accuracy required by the system is getting higher and higher, so there is a dual-speed shaft angle digital conversion circuit. [0003] The design idea of ​​the double-speed shaft angle digital circuit is to use the coarse-fine combination method to connect two rotary transformers with the speed change mechanism. When the rotary transformer works between one rotary transformer and the measured shaft, the fine shaft drives the coarse The shaft turns. The ide...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a pure hardware circuit for realizing encoding error correction processing, so as to solve the problem that the error correction processing of the current coarse-fine combination system cannot realize miniaturization and high speed

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