US 9,809,237 B2
Gate crossing arm collision detection system and method
Barton DeJarnatt, Louisville, KY (US); and Travis Pless, Waddy, KY (US)
Assigned to SIEMENS INDUSTRY, INC., Alpharetta, GA (US)
Filed by Siemens Industry, Inc., Alpharetta, GA (US)
Filed on Jan. 29, 2016, as Appl. No. 15/10,362.
Prior Publication US 2017/0217463 A1, Aug. 3, 2017
Int. Cl. G05D 1/00 (2006.01); G05D 3/00 (2006.01); G06F 7/00 (2006.01); G06F 17/00 (2006.01); B61L 29/08 (2006.01); B61L 23/00 (2006.01); B61L 29/04 (2006.01)
CPC B61L 29/08 (2013.01) [B61L 23/007 (2013.01); B61L 29/04 (2013.01); B61L 2201/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A detection and warning system for a railroad crossing, the system comprising:
a sensor configured to be mounted on an underside of a gate arm of a railroad crossing gate to detect a presence of a vehicle or other object that is obstructing the railroad crossing, the sensor including a sensing strip;
a sensing circuit coupled to the sensing strip to detect an event of contact being made between the vehicle or the object and the sensing strip of the sensor; and
a communication interface coupled to the sensor,
wherein in response to a detection of the vehicle or the other object, the communication interface relays to a locomotive approaching the railroad crossing a warning signal indicative of a possible collision on the railroad crossing with the vehicle or the other object,
wherein the communication interface to relay the warning signal to a control interface of a locomotive engine, and
wherein the sensing circuit is configured to operate in a fail-safe mode in that a reduce speed command is broadcast to all oncoming trains in case of a transmit condition when a collision or a circuit compromise is detected and no command is broadcast in case of a do not transmit condition when no collision is detected or the sensing circuit is functioning properly.