System and method for determining a quality of a location estimation of a powered system

• US 8,190,312 B2
• Filed: 03/13/2008
• Issued: 05/29/2012
• Est. Priority Date: 03/13/2008
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Kumar, Ajith Kuttannair, Nandedkar, Vishram Vinayak
• Primary Examiner(s): Morano, S. Joseph
• Assistant Examiner(s): KUHFUSS, ZACHARY L
• Application Number:
  US12/047,496
• Publication Number:
  US 20090234523A1
• Time in Patent Office: 1,538 Days
• Field of Search: 701/19, 701/20, 701/200, 701/207, 701/213, 701/214, 701/216, 701/217, 701/220, 342/357.3, 342/357.32
• US Class Current: 701/19
• CPC Class Codes: B61L 25/021 Measuring and recording of train speed
• CPC Class Codes: B61L 25/025 Absolute localisation, e.g. providing geodetic coordinates
• CPC Class Codes: B61L 25/026 Relative localisation, e.g. using odometer

Abstract

A system is provided for determining a quality of a location estimation of a powered system at a location. The system includes a first sensor configured to measure a first parameter of the powered system at the location. The system further includes a second sensor configured to measure a second parameter of the powered system at the location. The system further includes a second controller configured to determine the location estimation of the powered system and the quality of the location estimation, based upon a first location of the powered system based on the first parameter, and a second location of the powered system based on the second parameter of the powered system. A method is also provided for determining a quality of a location estimation of a powered system at a location.

Claims

1. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the powered system is a rail vehicle having a plurality of locomotives with at least two of the locomotives including at least one of the first sensor, at least one of the second sensor, and the at least one controller.

2. The system of claim 1, wherein the quality value of the location estimation represents a potential inaccuracy of the location estimation.

3. The system of claim 1, wherein the at least one controller is configured to determine one or more corrections to the first distance estimation based on the measured position from the second sensor and the quality value.

4. The system of claim 1, wherein the second sensor is configured to periodically provide the measured position to the at least one controller.

5. The system of claim 1, wherein the at least one controller is configured to automatically control one or more operations of the powered system based on at least one of the location estimation or the quality value.

6. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the at least one controller is configured to determine the first distance estimation of the powered system based on the speed of the powered system prior to the powered system reaching the location.

7. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the at least one controller is configured to be coupled to the second sensor, the controller configured to convert the measured position of the powered system into a second distance estimation of the powered system along a route from a reference point along the route based on one or more previously acquired measured positions and corresponding distances from the reference point along the route.

8. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein;

at least one of the first sensor is configured to transmit a first uncertainty signal or the second sensor is configured to transmit a second uncertainty signal to the at least one controller, at least one of the first uncertainty signal or the second uncertainty signal being indicative of a level of uncertainty in the speed or the measured position of the powered system.

9. The system of claim 8, wherein the at least one controller is configured to determine the quality value of the location estimation based on at least one of the first uncertainty signal or the second uncertainty signal.

10. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the at least one controller is configured to determine the quality value of the location estimation based on one or more previously acquired quality values.

11. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the second sensor is at least one global positioning system (GPS) device configured to communicate with one or more global positioning satellites.

12. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the location estimation of the powered system at the location is based on at least one of a sum of or difference between the quality value of the location estimation and at least one of the first distance estimation or the measured position.

13. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the at least one controller is configured to receive the first distance estimation from the first sensor more frequently than the at least one controller receives the measured position from the second sensor.

14. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the second sensor is configured to periodically provide the measured position to the at least one controller and the at least one controller is configured to determine the quality value based on a prior quality value that is determined between the measured positions that are periodically provided by the second sensor.

15. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the at least one controller is configured to increase the quality value when the second sensor fails to provide the measured position of the powered system to the at least one controller.

16. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the at least one controller is configured to compare the first distance estimation and the measured position to determine a precision of the measured position relative to the first distance estimation.

17. The system of claim 16, wherein the at least one controller is configured to determine the quality value based on a prior quality value when the precision falls below a threshold level.

18. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the at least one controller is configured to determine a parameter of the powered system for one or more of the locations along a route traveled by the powered system based on at least one of the location estimation or the quality value.

19. The system of claim 18, wherein the at least one controller is configured to adjust the parameter of the powered system to a modified parameter for an upcoming location of the powered system along the route.

20. The system of claim 18, wherein the parameter is the speed of the powered system;

and the at least one controller is configured to adjust the speed of the powered system based on at least one of the location estimation or the quality value.

21. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the at least one controller is configured to automatically control one or more operations of the powered system based on at least one of the location estimation or the quality value and the at least one controller is configured to switch from automatically controlling the one or more operations of the powered system to manual control of the one or more operations by an operator when the quality value is outside a predetermined range.

22. A system comprising:

a speed sensor configured to determine a speed of a powered system at a location;

a position determination device configured to provide a measured position of the powered system; and

at least one controller configured to determine a quality value of a location estimation of the powered system that is based on the speed of the powered system and the measured position of the powered system, wherein the quality value also is based at least in part on at least one of an uncertainty in the speed of the powered system or an uncertainty in the measured position of the powered system,

wherein at least one of the position determination device is configured to transmit a position uncertainty signal to the at least one controller or the speed sensor is configured to transmit a speed uncertainty signal to the at least one controller, and the at least one controller is configured to determine the quality value based on at least one of the position uncertainty signal or the speed uncertainty signal.

23. The system of claim 22, wherein the powered system is a rail vehicle traveling along a route and the location estimation is a distance estimation of the rail vehicle from a reference point along the route.

24. The system of claim 22, wherein one or more of the at least one controller is configured to determine the location estimation of the powered system based upon a first distance estimation of the powered system from a reference point along the route that is determined based on the speed of the powered system, a second distance estimation of the powered system along the route from the reference point based on the measured position of the powered system, and the quality value.

25. The system of claim 22, wherein the quality value of the location estimation represents a potential inaccuracy of the location estimation.

26. A system comprising:

a speed sensor configured to determine a speed of a powered system at a location;

a position determination device configured to provide a measured position of the powered system; and

at least one controller configured to determine a quality value of a location estimation of the powered system that is based on the speed of the powered system and the measured position of the powered system, wherein the quality value also is based at least in part on at least one of an uncertainty in the speed of the powered system or an uncertainty in the measured position of the powered system, wherein the at least one controller determines the quality value based on an uncertainty in the speed of the powered system when the position determination device fails to provide the measured position of the powered system.

27. A system comprising:

a first sensor configured to determine a first distance estimation of a powered system at a location based on a speed of the powered system;

a second sensor configured to determine a measured position of the powered system at the location; and

at least one controller configured to determine a location estimation of the powered system and a quality value of the location estimation, and the quality value of the location estimation is based at least in part on the distance estimation and the measured position of the powered system, wherein the at least one controller is configured to reduce the quality value when the second sensor provides the measured position to the at least one controller.