Method and apparatus for uniform time warning of railroad trains
First Claim
1. A system for controlling a train'"'"'s approach on a right-of-way to a grade crossing such that a uniform time warning is ensured comprising:
- a communication based train control scheme including a computer, situated on the train;
means situated at a wayside location for detecting the presence of the train at a first control point on the right-of-way and for determining the train'"'"'s speed thereat;
means for activating the gate at the grade crossing responsive to the train being at a second control point on the right-of-way wherein the second control point is based on the determined speed such that a uniform time warning is provided.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for controlling a train'"'"'s approach on a right-of-way to a grade crossing such that a uniform warning time is ensured comprising: a communication based train control scheme including a computer situated on the train; means for detecting the presence of the train at a first control point on the right-of-way and for determining the train'"'"'s speed thereat; means for activating the gate at the grade crossing responsive to the train being at a second control point on the right-of-way wherein the second control point is based on the determined speed such that a uniform warning time is provided.
12 Citations
10 Claims
-
1. A system for controlling a train'"'"'s approach on a right-of-way to a grade crossing such that a uniform time warning is ensured comprising:
-
a communication based train control scheme including a computer, situated on the train;
means situated at a wayside location for detecting the presence of the train at a first control point on the right-of-way and for determining the train'"'"'s speed thereat;
means for activating the gate at the grade crossing responsive to the train being at a second control point on the right-of-way wherein the second control point is based on the determined speed such that a uniform time warning is provided. - View Dependent Claims (2, 3)
-
-
4. A system for controlling a train'"'"'s approach on a right-of-way to a grade crossing such that a uniform time warning is ensured comprising:
-
a communication based train control scheme, including a computer, situated on the train;
means situated at a wayside location for detecting the presence of a train at a first control point on the right-of-way, and for determining the train'"'"'s speed thereat;
means for detecting any acceleration in train speed at variable locations of the train beyond the first control point, including means, responsive to detecting the acceleration for controlling the train speed in selected bands to preclude violating minimum warning times required at the grade crossing. - View Dependent Claims (5, 6)
-
-
7. A method of controlling a train'"'"'s approach on a right-of-way to a grade crossing such that a uniform time warning is ensured comprising the steps of:
-
detecting the presence of the train at a first control point on the right-of-way with a communication based control scheme, including a computer situated on the train;
determining the train'"'"'s speed at the first control point;
activating the gate at the gate crossing when the train is at a second control point on the right-of-way, wherein the second control point is selectively based on the determined speed such that a uniform time warning is provided. - View Dependent Claims (8, 9, 10)
-
Specification