US 11,866,080 B2
Signal aspect enforcement
Alon Green, Toronto (CA); and Walter Kinio, Toronto (CA)
Assigned to THALES CANADA INC, Ontario (CA)
Filed by THALES CANADA INC., Toronto (CA)
Filed on Oct. 16, 2020, as Appl. No. 17/073,145.
Claims priority of provisional application 62/916,672, filed on Oct. 17, 2019.
Prior Publication US 2021/0114634 A1, Apr. 22, 2021
Int. Cl. B61L 3/02 (2006.01); B61L 3/00 (2006.01); B61L 9/00 (2006.01); B61L 15/00 (2006.01); B61L 25/02 (2006.01); B61L 3/12 (2006.01); B61L 23/04 (2006.01)
CPC B61L 3/02 (2013.01) [B61L 3/008 (2013.01); B61L 3/125 (2013.01); B61L 9/00 (2013.01); B61L 15/0027 (2013.01); B61L 25/021 (2013.01); B61L 25/025 (2013.01); B61L 23/041 (2013.01); B61L 2201/00 (2013.01); B61L 2205/00 (2013.01); B61L 2207/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A signal aspect enforcement method for a rail vehicle with an unknown position comprising:
receiving speed measurements from speed measuring device by an on-board controller;
determining using the received speed measurements if rail vehicle speed is less than a predetermined line-of-sight threshold speed;
receiving grade measurements from a grade measuring device by the on-board controller and determining grade of rail;
determining worst-case braking distance of the rail vehicle using the rail vehicle speed and grade of rail;
receiving image data including a first signal aspect from a camera system and beacon/radio data including a second signal aspect from a beacon/radio system by the on-board controller;
determining if the first signal aspect matches the second signal aspect; and
determining route of rail vehicle and speed limit of rail vehicle by the on-board controller based on the first signal aspect.