US 11,054,435 B2
Method and device for processing a signal produced by a sensor for detecting the rotation of a rotating target
Fabien Joseph, Castanet Tolosan (FR); and Valerie Gouzenne Coutier, Tournefeuille (FR)
Assigned to CONTINENTAL AUTOMOTIIVE FRANCE, Toulouse (FR); and CONTINENTAL AUTOMOTIVE GMBH, Hannover (DE)
Appl. No. 15/552,859
Filed by CONTINENTAL AUTOMOTIVE FRANCE, Toulouse (FR); and CONTINENTAL AUTOMOTIVE GMBH, Hannover (DE)
PCT Filed Feb. 22, 2016, PCT No. PCT/EP2016/000306
§ 371(c)(1), (2) Date Aug. 23, 2017,
PCT Pub. No. WO2016/134841, PCT Pub. Date Sep. 1, 2016.
Claims priority of application No. 1551551 (FR), filed on Feb. 24, 2015.
Prior Publication US 2018/0031594 A1, Feb. 1, 2018
Int. Cl. G01P 3/44 (2006.01); G01P 13/04 (2006.01); G01D 5/245 (2006.01); F02D 41/00 (2006.01); F02D 41/28 (2006.01); H03K 5/26 (2006.01); G01M 15/06 (2006.01)
CPC G01P 3/44 (2013.01) [F02D 41/009 (2013.01); F02D 41/28 (2013.01); G01D 5/245 (2013.01); G01D 5/2457 (2013.01); G01P 13/04 (2013.01); G01P 13/045 (2013.01); F02D 41/0097 (2013.01); F02D 2041/0095 (2013.01); F02D 2041/286 (2013.01); F02D 2250/06 (2013.01); G01M 15/06 (2013.01); H03K 5/26 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for processing a primary signal produced by a sensor for detecting rotation of a rotating target of voltage level type, said primary signal comprised of pulses having, for a given speed of rotation of the target, a first positive voltage level when the target is turning in a first direction of rotation, and a second positive voltage level different from said first voltage level when the target is turning in a second direction of rotation opposite said first direction of rotation, the method comprising:
generating a first secondary signal by comparing the primary signal to a first voltage threshold between the first voltage level and the second voltage level;
generating a second secondary signal by comparing the primary signal to a second voltage threshold between the second voltage level and zero voltage;
introducing a delay in the second secondary signal with respect to the first secondary signal;
determining a duration between an active edge of the second secondary signal and a last active edge of the first secondary signal preceding said active edge of the second secondary signal; and
determining the direction of rotation of the target from a result of comparing the determined duration to a time threshold.