Decoding method of absolute value encoder, equipment medium and product

Abstract

The invention relates to the field of absolute value code discs, and discloses a decoding method of an absolute value encoder, which comprises the following steps of: outputting a first driving signal for driving an LED light source and a second driving signal for controlling a CCD (Charge Coupled Device); receiving pixel information collected by a CCDon the absolute value encoder, wherein the pixel information is a pixel pattern which is collected by the CCD and formed by light and dark stripes of a coded disc irradiated by an LED light source on the absolute value encoder; determining a position code corresponding to the pixel information according to the code corresponding to each stripe in the pixel information, and determining a coarse angle of a measuring shaft connected with the coded disc according to the position code; calculating the average value of the distances between the center positions of a plurality of stripes in the pixel information and the center of a preset pixel corresponding to the CCD as a subdivision value; and correcting the rough angle according to the subdivision value to obtain an accurate angle of the measuring shaft. According to the invention, the precision of the output angle of the absolute value coded disc is improved, so that the high-precision measurement requirements of different external measurement devices are met.

Description

technical field [0001] The invention relates to the field of absolute value code discs, in particular to a decoding method, device, medium and product of an absolute value encoder. Background technique [0002] Due to the increasing development of the current industry, people have great requirements for the accuracy of the code disc, and it is very important to obtain the accurate value of the position in real time. In the prior art, the pixel information collected by the CCD is directly decoded, and the decoded angle value is output as the final angle value. Since the decoding accuracy and frame rate of the existing absolute value code disc are severely limited, it cannot be guaranteed High precision and high frame rate output at the same time. Most of the current absolute encoders are used in precision measuring equipment, and they all need to output more accurate angle values. For example, when the authority uses the sub-encoder in a total station, the total station itse...

AI Technical Summary

Problems solved by technology

[0004] The second object of the present invention is to provide an electronic device, which can solve the problem of directly decoding the pixel information collected by the CCD in the prior art, and output the angle value obtained by decoding as the final angle value. The decoding accuracy and frame rate of the value code disc are severely limited, so it is impossible to guarantee high precision and high frame rate output at the same time

[0005] The thi

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