US 12,139,023 B2
Method for ascertaining a state of an electric drive of a means of transportation
Ivan Melendez Vazquez, Herrenberg (DE); and Rolando Doelling, Hechingen (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Appl. No. 17/593,077
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Mar. 4, 2020, PCT No. PCT/EP2020/055637
§ 371(c)(1), (2) Date Sep. 8, 2021,
PCT Pub. No. WO2020/182558, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 10 2019 203 364.4 (DE), filed on Mar. 12, 2019; and application No. 10 2019 203 816.6 (DE), filed on Mar. 20, 2019.
Prior Publication US 2022/0153141 A1, May 19, 2022
Int. Cl. B60L 3/12 (2006.01); G01D 21/00 (2006.01); G08B 21/18 (2006.01)
CPC B60L 3/12 (2013.01) [G01D 21/00 (2013.01); B60L 2200/12 (2013.01); B60L 2240/12 (2013.01); B60L 2240/14 (2013.01); B60L 2250/00 (2013.01); G08B 21/182 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for ascertaining a state of an electric drive of a transportation device, the method comprising:
providing sensor data from sensors of the drive, the sensor data indicating parameters of the drive;
storing, when an instantaneous operating range of the drive and/or of the transportation device, corresponds to a predefined operating range, the sensor data as measuring sensor signals, which originate from sensors predefined for the predefined operating range;
recognizing a defect of the drive when at least one of the measuring sensor signals deviates from a predefined standard sensor signal by a predefined degree;
outputting a warning about a presence of the defect to a user of the transportation device; and
classifying the measuring sensor signal, based on at least one predefined statistical code number;
wherein a calculation of a state parameter of the drive corresponds to a distance between the at least one predefined statistical code number of the measuring sensor signals and the same statistical code number of the standard sensor signal, and
wherein the distance is a Mahalanobis distance.