Apparatus and method for locating assets within a rail yard

• US 20070150130A1
• Filed: 12/23/2005
• Published: 06/28/2007
• Est. Priority Date: 12/23/2005
• Status: Active Grant

• Current Assignee: GE Global Sourcing LLC (Westinghouse Air Brake Technologies Corporation)
• Original Assignee: General Electric Company
• Inventors: Mitchell, Robert, Andarawis, Emad, Davenport, David, Bhotika, Rahul, Hershey, John, Welles, Kenneth
• Granted Patent: US 7,805,227 B2
• Time in Patent Office: Days
• US Class Current: 701/19
• CPC Class Codes: B61L 17/00 Switching systems for classification yards
• CPC Class Codes: B61L 2205/04 Satellite based navigation systems, e.g. global positioning system [GPS]
• CPC Class Codes: B61L 25/025 Absolute localisation, e.g. providing geodetic coordinates

Abstract

A method for tracking assets within a rail yard, the method comprising: creating a track layout database for the rail yard, the track layout database providing a map of rail tracks and switches within the rail yard, wherein the track layout database includes machine readable data identifying discrete locations of the rail tracks and switches of the rail yard, each discrete location corresponding to a geographical position of a portion of a rail track or switch; associating rail yard processing steps with portions of the track layout database; receiving a geographical position signal corresponding to an asset within the rail yard; comparing the geographical position signal to the machine readable data of the track layout database in order to identify the location of the asset within the map; and presenting a graphical representation of the location of the asset on the map along with the yard process steps associated with the track section occupied by the asset, wherein the geographical position signal is received within a time period to allow the graphical presentation to be used in a management decision corresponding to the asset.

Claims

1. A method for tracking assets within a rail yard, comprising:

creating a track layout database for the rail yard, the track layout database providing a map of rail tracks and switches within the rail yard, wherein the track layout database includes machine readable data identifying discrete locations of the rail tracks and switches of the rail yard, each discrete location corresponding to a geographical position of a portion of a rail track or switch;

associating rail yard processing steps with portions of the track layout database;

receiving a geographical position signal corresponding to a location of an asset within the rail yard;

comparing the geographical position signal to the machine readable data of the track layout database in order to identify the location of the asset within the map; and

displaying the map with a graphical presentation of the location of the asset and an indication as to the rail yard processing steps conducted on the track occupied by the asset, wherein the geographical position signal is received within a time period to allow the graphical presentation to be used in a management decision corresponding to the asset.

2. The method as in claim 1, wherein the step of creating the track layout database further comprises using aerial photography to provide a photographical image of the rail tracks and switches, wherein the discrete locations of the rail tracks and switches are created by selecting points on the photographical image to create the machine readable data using image processing algorithms, wherein the image processing algorithms cause the track layout database to have digitized machine readable data corresponding to the aerial photography of the rail yard.

3. The method as in claim 2, wherein the photographical image is a digital orthophoto quadrangle (DOQ) image or a computer-generated image of an aerial photograph wherein image displacement caused by terrain relief and camera tilt angles has been removed and a rail track segment is defined by connecting two of the selected points along a rail track segment and a selected switch position is further defined as including an end point of a rail track segment.

4. The method as in claim 2, wherein the step of creating the track layout database further comprises:

selecting one or more specific sites within the rail yard which are also visible in the aerial photographs used to construct the track layout database;

collecting geospatial position data for each specific site using signals received from at least one global positioning system receiver, the geospatial position data being generated at each specific site via the at least one global positioning system receiver;

comparing the collected geospatial position data for each site with a corresponding digitized geospatial position of each site, the corresponding digitized geospatial position being obtained from the digitized machined readable data corresponding to the aerial photography of the rail yard;

defining a geometric transformation for the collected geospatial position data and the corresponding digitized geospatial position data in order to minimize errors between the collected geospatial position data for each site and the corresponding digitized geospatial position of each site; and

applying the geometric transformation to the track layout database.

5. The method as in claim 4, wherein the one or more specific sites correspond to manual switch throw machines located along the rail tracks.

6. The method as in claim 4 wherein the at least one global positioning system receiver is a survey grade global position system receiver and the geometric transformation minimizes the errors between the collected geospatial position data for each site and the corresponding digitized geospatial position of each site via a least square error criteria.

7. The method as in claim 1, wherein the rail yard processing steps include:

train arrival;

classification of rail cars;

locomotive service;

rail car repair;

rail car inspection, and wherein the time period is less than two minutes.

8. The method as in claim 1, further comprising:

creating a data tracking history for the asset; and

using the data tracking history of the asset to assign the asset to one specific rail track section and identify the rail yard processing steps performed on the track section assigned to the asset.

9. The method as in claim 1, further comprising:

creating a special status map feature to integrate information from the rail yard concerning an associated asset;

providing a geographical position of the associated asset; and

presenting a graphical presentation of the associated asset on the map.

10. The method as in claim 9, wherein the information from the rail yard is provided by radio communications and the associated asset is a rail car selected from the group consisting of:

bad order cars;

hazmat cars;

refrigerator cars;

uniquely identified cars; and

combinations of the foregoing.

11. The method as in claim 9, wherein the associated asset is a rail car and the information corresponds to a time when the rail car arrived in the rail yard and a time duration the rail car has been in the rail yard.

12. The method as in claim 9, wherein the information is global positioning data corresponding to the associated asset and the associated asset is not a rail car or locomotive and the graphical presentation of the associated asset locates the associated asset relative to a specific rail track within the rail yard.

13. The method as in claim 1, wherein the step of creating the track layout database further comprises:

positioning a global positioning device on a vehicle configured to travel along the tracks of the rail yard;

generating a plurality of signals corresponding to geographical positions as the vehicle traverses along the rail tracks within the rail yard; and

recording the plurality of signals to provide the map of rail tracks and switches within the rail yard.

14. The method as in claim 13, wherein the vehicle travels along the tracks of the rail yard numerous times to provide the map.

15. The method as in claim 1, further comprising:

providing name designators for the rail tracks, wherein the name designators match those used for the rail tracks at the rail yard.

16. A system for tracking assets within a rail yard, the system comprising:

a track layout database for the rail yard, the track layout database providing a map of rail tracks and switches within the rail yard, wherein the track layout database includes machine readable data identifying discrete locations of the rail tracks and switches of the rail yard, each discrete location corresponding to a geographical position of a portion of a rail track or switch;

a plurality of positioning devices configured to generate geographical position signals corresponding to locations of a plurality of assets within the rail yard; and

a computer system, configured to receive and compare the geographical position signals to the machine readable data of the track layout database in order to identify the location of the plurality of assets within the map and present a graphical presentation of the location of the plurality of assets and the rail yard process tasks performed at the track location occupied by the asset on the map.

17. The system as in claim 16, wherein the geographical position signals are transmitted wirelessly.

18. The system as in claim 16, wherein the track layout database is created from aerial photography of the rail yard and the discrete locations of the rail tracks and switches are created by selecting points on the map to create the machine readable data using image processing algorithms, wherein the aerial photography provides a photographical image of rail tracks and switches in the rail yard and the photographical image is a digital orthophoto quadrangle (DOQ) image or a computer-generated image of an aerial photograph wherein image displacement caused by terrain relief and camera tilt angles has been removed.

19. The system as in claim 18, wherein the track layout database is created by the method comprising:

selecting one or more specific sites within the rail yard which are also visible in the aerial photographs used to construct the track database;

collecting geospatial position data for each specific site using signals received from at least one global positioning system receiver, the geospatial position data being generated at each specific site via the at least one global positioning system receiver;

comparing the collected geospatial position data for each site with a corresponding digitized geospatial position of each site, the corresponding digitized geospatial position being obtained from the digitized machined readable data corresponding to the aerial photography of the rail yard;

defining a geometric transformation for the collected geospatial position data and the corresponding digitized geospatial position data in order to minimize errors between the collected geospatial position data for each site and the corresponding digitized geospatial position of each site; and

applying the geometric transformation to the entire track layout database.

20. The system as in claim 19, wherein the geometric transformation minimizes the errors between the collected geospatial position data for each site and the corresponding digitized geospatial position of each site via a least square error criteria.

21. The system as in claim 16, wherein the track layout database is created by:

positioning a global positioning device on a vehicle configured to travel along the rail tracks of the rail yard;

generating a plurality of signals corresponding to geographical positions as the vehicle traverses along the rail tracks within the rail yard; and

recording the plurality of signals to provide the map of rail tracks and switches within the rail yard.

22. The system as in claim 16, wherein the graphical presentation of the location of the plurality of assets on the map also includes a presentation of the rail yard process tasks conducted on or about the track segment occupied by each of the plurality of assets.

23. The system as in claim 16, wherein the computer system creates a data tracking history for at least one of the plurality of assets;

and the computer system uses the data tracking history to assign the asset to one specific rail track.

24. The system as in claim 16, wherein the computer further comprises a storage medium encoded with machine readable computer program code, the storage medium including instructions for causing the computer to implement a method comprising:

creating a special status map feature to integrate information from the rail yard concerning an associated asset;

providing a geographical position of the associated asset; and

presenting a graphical presentation of the associated asset on the map.

25. The system as in claim 24, wherein the information from the rail yard is provided by radio communications and the associated asset is a rail car selected from the group consisting of:

bad order cars;

hazmat cars;

refrigerator cars;

uniquely identified cars; and

combinations of the foregoing.

26. The system as in claim 24, wherein the associated asset is a rail car and the information corresponds to the time that the rail car has arrived in the rail yard and how long the rail car has been in the rail yard.

27. The system as in claim 24, wherein the information is global positioning data corresponding to the associated asset and the associated asset is not a rail car or locomotive and the graphical presentation of the associated asset locates the associated asset relative to a specific rail track within the rail yard.

28. The system as in claim 22, wherein

presenting a graphical presentation of the location of the asset on the map, wherein the geographical position signal is received within a time period to allow the graphical presentation to manage the asset, wherein the rail yard processing steps include:

train arrival;

classification of rail cars;

locomotive service;

rail car repair;

rail car inspection, and wherein the time period is less than two minutes.