US 12,384,433 B2
Method and arrangement for determining the movement state of a rail vehicle wheel
Bernhard Kneidinger, Göllersdorf (AT); Gerhard Schandl, Leonding (AT); and Vladimir Stojanovic, Vienna (AT)
Assigned to Siemens Mobility GmbH, Munich (DE)
Appl. No. 18/556,717
Filed by Siemens Mobility GmbH, Munich (DE)
PCT Filed Mar. 28, 2022, PCT No. PCT/EP2022/058097
§ 371(c)(1), (2) Date Oct. 23, 2023,
PCT Pub. No. WO2022/223241, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 10 2021 204 088.8 (DE), filed on Apr. 23, 2021.
Prior Publication US 2024/0132124 A1, Apr. 25, 2024
Prior Publication US 2024/0227883 A9, Jul. 11, 2024
Int. Cl. B61L 15/00 (2006.01); B60L 3/10 (2006.01)
CPC B61L 15/0081 (2013.01) [B60L 3/102 (2013.01); B60L 2200/26 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for determining a movement state of a wheel of a rail vehicle relative to a rail traversed by the wheel of the rail vehicle, the method comprising:
using a camera focused on a wheel-rail region on the rail vehicle to capture successive images of the wheel-rail region, the wheel-rail region containing at least a sub-region of a wheel of the rail vehicle and at least a sub-region of a rail to be traversed by the wheel;
ascertaining a region in the images along which the sub-regions of the wheel and the rail are in contact;
in a first image of the sub-region of the rail, ascertaining at least a characteristic point being clearly optically recognizable in the first image and in subsequent images;
in a first image of the sub-region of the wheel, ascertaining at least one characteristic point being clearly recognizable in the first image and in the subsequent images;
determining respective distances of the characteristic points from the contact region for successive images;
determining a movement state of the wheel from a change in the distance of the characteristic points from the contact region, resulting from the successive images; and
performing at least one determining step selected from the group consisting of:
group 1) determining rolling as the movement state of the wheel when both: the distance between the contact region and the characteristic point of the sub-region of the rail, and the distance between the contact region and the characteristic point of the sub-region of the wheel, change equally and in the same direction;
group 2) determining skidding as the movement state of the wheel when: the distance between the contact region and the characteristic point of the sub-region of the wheel changes, and the distance between the contact region and the characteristic point of the sub-region of the rail remains substantially unchanged; and
group 3) determining sliding as the movement state of the wheel when: the distance between the contact region and the characteristic point of the sub-region of the rail changes, and the distance between the contact region and the characteristic point of the sub-region of the wheel remains substantially unchanged.