System and method for computing rail car switching solutions in a switchyard including logic to re-switch cars for block size

• US 7,792,616 B2
• Filed: 03/23/2006
• Issued: 09/07/2010
• Est. Priority Date: 12/30/2005
• Status: Active Grant

• Current Assignee: Canadian National Railway Company
• Original Assignee: Canadian National Railway Company
• Inventors: Morency, Vincent, Pathak, Anshu, Doyle, Gordon, Muinonen, Kari, Barker, Matthew
• Primary Examiner(s): Keith; Jack
• Assistant Examiner(s): Nguyen; Chuong P
• Application Number:
  US11/388,041
• Publication Number:
  US 20070156307A1
• Time in Patent Office: 1,629 Days
• Field of Search: 701/1, 701/19, 246/2.R, 246/167, 246/176, 246/182, 246/219, 246/220, 705/7, 705/8
• US Class Current: 701/19
• CPC Class Codes: B61L 17/00 Switching systems for classification yards

Abstract

A system for computing car switching solutions in a railway switch yard. The system is computer based and has an input for receiving data conveying information about one or more arrival trains arriving at the switch yard and data conveying information about departure trains to depart the switch yard. A processing entity processes the data and computes car switching solutions for the railcars.

Claims

1. A method using a processor for computing car switching solutions in a railway switch yard containing a switch, a plurality of classification tracks and a reswitching track, the reswitching track defining a path that re-circulates cars from a position downstream the switch to a position upstream the switch, said method comprising:

a) receiving at an input first data conveying information about a size of a given train block to be assembled by the switch yard;

b) computing with the processor a car switching solution for one or more cars of the given train block, wherein a computation of a car switching solution includes a selection of at least one car switching option among a set of car switching options, one car switching option of the set including switching the car of the given train block to a classification track and another car switching option of the set including switching the car of the given train block to the reswitching track;

c) using during said computing the information about the size of the given train block as a factor in selecting between a car switching option to switch the car to a classification track and a car switching option to switch the car to the reswitching track;

d) releasing at an output second data conveying the car switching option selected on a basis of said computing.

2. A method as defined in claim 1, including communicating to a user the car switching option selected on a basis of said computing.

3. A method as defined in claim 1, including communicating the second data to a car switch control system that derives car switching commands from the second data.

4. A method as defined in claim 1, including computing an expected switch time for a given car that belongs to the given train block and using the computed expected switch time to compute a car switching solution for the given car, the expected switch time being indicative of when the given car is expected to arrive at the switch.

5. A method as defined in claim 1, wherein the railway switch yard has a switching queue containing a plurality of cars that belong to the given train block to be sequentially switched to classification tracks, said method including computing multiple switching solutions for the one or more cars as the one or more cars progress through the switching queue.

6. A method as defined in claim 1, including receiving at said input data indicative of an ETA at the switch yard of a car that belongs to the given train block, said method further including computing one or more car switching solutions by using the data indicative of an ETA as a factor.

7. A method as defined in claim 1, wherein the switch yard is a hump switch yard.

8. A method as defined in claim 1, wherein the switch yard is a flat switch yard.

9. A method for computing railcar switching solutions as defined in claim 1, including computing switching solutions for each car of the given train block, wherein the switching solutions locate each car of the given train block in the re-switching track.

10. A method for computing railcar switching solutions as defined in claim 1, including selecting a car switching option to switch the car to the re-switching track when the first data indicates that the given train block has a size below a certain threshold.