ANGLE IN CODE TRANSDUCER ERROR CORRECTION DEVICE Russian patent published in 2021 - IPC H03M1/06 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment and automatic control equipment, in particular to angle-to-code converters, and can be used in systems where it is required to measure position with high accuracy. Angle-code converter error correction device comprises four units for calculating correction coefficients (for first, second, third and fourth harmonics), based on conversion of uncorrected angle code (with shift to required number of digits from the left) into corresponding correction coefficients based on CORDIC-converters in "turn" mode, wherein for third harmonic formula of three-angle angle is used for sinus and formula of degree reduction for square of sine. Outputs of correction coefficients calculation units are added with angle-code converter code and output of last adder is corrected angle code.

EFFECT: high accuracy of angle converters into a code, including elimination of non-linearity with odd period (3rd harmonic).

1 cl, 1 tbl, 13 dwg