US 12,292,350 B2
Magnetoelastic torque sensor assembly for reducing magnetic error due to harmonics
Jean-Francois Veillette, St. Boniface (CA); and Serge Kaldany, Munich (DE)
Assigned to BRP Megatech Industries Inc., Valcourt (CA)
Appl. No. 17/753,716
Filed by BRP Megatech Industries Inc., Valcourt (CA)
PCT Filed Sep. 13, 2019, PCT No. PCT/IB2019/057751
§ 371(c)(1), (2) Date Mar. 11, 2022,
PCT Pub. No. WO2021/048601, PCT Pub. Date Mar. 18, 2021.
Prior Publication US 2022/0349762 A1, Nov. 3, 2022
Int. Cl. G01L 3/10 (2006.01); G01L 5/22 (2006.01)
CPC G01L 3/102 (2013.01) [G01L 5/221 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A torque sensor assembly comprising:
a shaft configured to receive an applied torque, the shaft including at least one region being magnetoelastic and configured to generate a magnetic field in response to the applied torque;
a plurality of sensors, circumferentially positioned around the at least one region, being configured to generate a plurality of signals that are indicative of the magnetic field, each signal of the plurality of signals including multiple harmonic components; and
a controller connected with the plurality of sensors and being configured to:
receive the plurality of signals;
determine (i) an average of the plurality of signals in order to cancel at least one of the harmonic components of the multiple harmonic components for each signal of the plurality of signals, and (ii) a magnitude of the applied torque based on the average of the plurality of signals; and
calculate an error for the average of the plurality of signals, the error for the average of the plurality of signals being expressed as a function of a total number of sensors of the plurality of sensors.