US 11,860,125 B2
Prognostics system for detecting wear in encoders used to sense wheel speed in vehicles
Mohit Batra, Kitchener (CA); Jasmeet Singh Ladoiye, Carleton Place (CA); Milad Alekajbaf, North York (CA); and Douglas James Spry, Auburn Hills, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on May 11, 2021, as Appl. No. 17/317,697.
Prior Publication US 2022/0365030 A1, Nov. 17, 2022
Int. Cl. G01N 27/82 (2006.01); B60T 8/175 (2006.01); B60T 8/172 (2006.01); B60T 8/1755 (2006.01); G06F 18/25 (2023.01)
CPC G01N 27/82 (2013.01) [B60T 8/172 (2013.01); B60T 8/175 (2013.01); B60T 8/17551 (2013.01); G06F 18/254 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A system for detecting wear in an encoder used to sense a wheel speed in a vehicle, the system comprising:
a sensor configured to sense the wheel speed of the vehicle by sensing a magnetic material on the encoder coupled to a wheel of the vehicle;
a noise detection module including a plurality of noise detectors configured to detect noise in a wheel speed signal generated by the sensor;
an estimation module configured to:
estimate a state of health of the encoder based on the noise detected in the wheel speed signal; and
generate an alert in response to the state of health indicating that an amount of wear on the encoder is greater than a predetermined threshold; and
a filter configured to filter the noise in the wheel speed signal and to output a filtered wheel speed signal to a control system controlling stability of the vehicle.