US 11,722,157 B2
Methods, computer programs, devices, and encoders for signal error correction
Fredrik Gustafsson, Strängnäs (SE)
Assigned to LEINE & LINDE AB, Strängnäs (SE)
Filed by LEINE & LINDE AB, Strängnäs (SE)
Filed on Jan. 29, 2019, as Appl. No. 16/261,145.
Claims priority of application No. 1850118-9 (SE), filed on Feb. 1, 2018.
Prior Publication US 2019/0238161 A1, Aug. 1, 2019
Int. Cl. H03M 13/00 (2006.01); H03M 13/31 (2006.01); G11B 20/18 (2006.01); G01D 5/244 (2006.01); G01D 5/245 (2006.01)
CPC H03M 13/31 (2013.01) [G01D 5/24471 (2013.01); G01D 5/24495 (2013.01); G11B 20/1833 (2013.01); G01D 5/2451 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for signal error correction of a position signal relating to a relative position of at least one sensor with respect to a position reference, comprising:
determining a set of parameter values of a parameterized approximation of a corrected relative position with respect to time based on measurements of the position signal over a duration of at least one period of a periodic signal error of the position signal;
estimating a first corrected relative position at a first time based on the parameterized approximation using the determined set of parameter values and the first time, the estimating including forming a weighted average of a set of previous speeds relating to a change of the relative position of the at least one sensor with respect to the position reference and a current speed relating to a change of the relative position of the at least one sensor with respect to the position reference; and
outputting a compensated signal related to the first corrected relative position.