Railway crossing collision avoidance system
First Claim
1. A railroad crossing collision avoidance system for alerting a road vehicle approaching a railroad crossing of an oncoming rail vehicle, comprising:
- tracking means on said rail vehicle to determine said rail vehicle'"'"'s position with respect to said railroad crossing;
transmitter means responsive to said tracking means for transmitting tracking data at a unique radio frequency carrier, said tracking data being indicative of the location of said rail vehicle from said railroad crossing;
first receiver means comprised of a multi-frequency scanner at said railroad crossing for receiving said transmitted tracking data from one or more of said rail vehicles;
processor means at said railroad crossing for calculating the velocity and arrival time of said rail vehicle in response to said tracking data; and
transmitter means at said railroad crossing responsive to said processor means for transmitting an alarm signal to an approaching road vehicle, said alarm signal being indicative of the velocity and time of arrival of a rail vehicle at said railroad crossing.
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Accused Products
Abstract
With the vehicle anti-collision system of the present invention, road vehicles in the vicinity of a railway crossing are alerted as a train approaches the crossing. A signalling device operating in conjunction with a GPS receiver located in the train emits a signal to a receiver located at the railway crossing to provide an indication of the rail vehicle'"'"'s location with respect to the railway crossing. The signal is sent continuously at predetermined intervals to provide the railway crossing with sufficient data to estimate the velocity and time of arrival of the train or railway vehicle at the crossing. The railway crossing processes the information and transmits an alarm signal to approaching road vehicles as the rail vehicle approaches the crossing. The signal emitted by the crossing is received at the road vehicle which provides various levels of alarms depending on how close the rail vehicle is to the crossing.
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Citations
18 Claims
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1. A railroad crossing collision avoidance system for alerting a road vehicle approaching a railroad crossing of an oncoming rail vehicle, comprising:
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tracking means on said rail vehicle to determine said rail vehicle'"'"'s position with respect to said railroad crossing; transmitter means responsive to said tracking means for transmitting tracking data at a unique radio frequency carrier, said tracking data being indicative of the location of said rail vehicle from said railroad crossing; first receiver means comprised of a multi-frequency scanner at said railroad crossing for receiving said transmitted tracking data from one or more of said rail vehicles; processor means at said railroad crossing for calculating the velocity and arrival time of said rail vehicle in response to said tracking data; and transmitter means at said railroad crossing responsive to said processor means for transmitting an alarm signal to an approaching road vehicle, said alarm signal being indicative of the velocity and time of arrival of a rail vehicle at said railroad crossing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A railroad crossing collision avoidance system for alerting a road vehicle approaching a railroad crossing of an oncoming rail vehicle, comprising:
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tracking means on said rail vehicle to derive tracking data indicative of said rail vehicle'"'"'s position with respect to said railroad crossing; storing means on said rail vehicle for storing locations of railroad crossings along a railway line travelled by said rail vehicle; processor means on said rail vehicle for calculating the velocity of said rail vehicle and arrival time at said railroad crossing, in response to said tracking data; and first transmitter means responsive to said processor means for transmitting an alarm signal to an approaching road vehicle, said alarm signal being indicative of the velocity and time of arrival of a rail vehicle at said railroad crossing; and
second transmitter means at said railroad crossings for transmitting its location to each oncoming rail vehicle, as said rail vehicle travels along said railway line. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification