US 11,718,163 B2
Method and system for obstruction detection
Dennie Wilhelmus Hendrikus Craane, Nijmegen (NL); and Gerrit Schwepper, Kamp-Lintfort (DE)
Assigned to INALFA ROOF SYSTEMS GROUP B.V., Oostrum (NL)
Filed by Inalfa Roof Systems Group B.V., Oostrum (NL)
Filed on Jul. 16, 2021, as Appl. No. 17/378,034.
Claims priority of application No. 20186202 (EP), filed on Jul. 16, 2020.
Prior Publication US 2022/0016961 A1, Jan. 20, 2022
Int. Cl. B60J 7/057 (2006.01); B60J 7/043 (2006.01); H02H 7/085 (2006.01)
CPC B60J 7/0573 (2013.01) [B60J 7/043 (2013.01); H02H 7/0854 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of detecting a movement obstruction of a movably arranged vehicle component driven by an electric motor, the electric motor being supplied with a motor current, the method comprising:
supplying the electric motor with a supply voltage, thereby supplying the motor current;
determining a frequency content of the motor current; and
analysing the frequency content to determine whether the movement obstruction is present or not, comprising filtering the frequency content of the motor current with a frequency filter, comparing a filter output of the frequency filter with a threshold value, and based on a comparison of the filter output of the frequency filter with the threshold value determining whether the movement obstruction is present or not.