Patent ID: 11922799
Assignee: nan
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A method for a warning system to provide a warning in the event a foreign object is detected travelling in a wrong direction, said method comprising:
(a) providing a plurality of components in the warning system, said warning system comprising:
(i) a Lidar device being adapted to emit one or more laser beams configured to detect a first foreign object travelling in a first direction and a second foreign object travelling in a second direction, wherein the first and second directions are opposite directions;
(ii) an audio source configured to generate an audible sound when a first relay is closed and not generate the audible sound when the first relay is open; and
(iii) a light source configured to generate a light signal when a second relay is closed and not generate the light signal when the second relay is open; and

(b) determining whether the first foreign object has crossed a first laser;
(c) determining, in response to determining that the first foreign object has crossed the first laser, whether the first foreign object has crossed a second laser;
(d) opening the first relay and opening the second relay in response to determining that the first foreign object has crossed both the first laser and the second laser;
(e) determining whether the second foreign object has crossed the second laser;
(f) determining, in response to determining that the second foreign object has crossed the second laser, whether the second foreign object has crossed the first laser; and
(g) closing at least one of the first relay or the second relay in response to determining that the second foreign object has crossed both the second laser and the first laser.