Patent ID: 11866080
Assignee: THALES CANADA INC.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
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.