Vehicle determination system and method using a kalman filter and critical milepost data
First Claim
Patent Images
1. A vehicle location determination system (LDS) comprising:
- a computer or processor;
a speed bias based speed integration module;
a Kalman filter based estimator, wherein the computer or processor is programmed to estimate real time location of the vehicle along a route via the Kalman filter based estimator that estimates the real time location in response solely to both GPS information and vehicle speed information; and
a critical milepost module comprising a database of identifying entries that are distinct and independent from the GPS information and the vehicle speed information, wherein the computer or processor is further programmed to reset the speed bias based integration module based upon the identifying entries in the database such that the estimated real time location is robust to cumulative errors and disturbances associated with both the GPS information and vehicle speed information to ensure the estimated real time location information is accurate.
2 Assignments
0 Petitions
Accused Products
Abstract
A vehicle location determination system and method provide an estimate of real time location of the vehicle along a route in response solely to vehicle GPS information and vehicle speed information such that the estimated real time distance is robust to errors and disturbances associated with both the vehicle GPS information and vehicle speed information to ensure the estimated real time location information is accurate.
-
Citations
27 Claims
-
1. A vehicle location determination system (LDS) comprising:
-
a computer or processor; a speed bias based speed integration module; a Kalman filter based estimator, wherein the computer or processor is programmed to estimate real time location of the vehicle along a route via the Kalman filter based estimator that estimates the real time location in response solely to both GPS information and vehicle speed information; and a critical milepost module comprising a database of identifying entries that are distinct and independent from the GPS information and the vehicle speed information, wherein the computer or processor is further programmed to reset the speed bias based integration module based upon the identifying entries in the database such that the estimated real time location is robust to cumulative errors and disturbances associated with both the GPS information and vehicle speed information to ensure the estimated real time location information is accurate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of determining real time location of a vehicle along a route, the method comprising:
-
providing a location determination system (LDS) comprising a computer or processor, a GPS processing module, speed bias based speed integration module, and a Kalman filter based estimator; programming the computer or processor to measure GPS information via the GPS processing module, and measuring the GPS information via the GPS processing module associated with the vehicle; programming the computer or processor to measure speed information via the speed bias based speed integration module and measuring the speed information via the speed bias based speed integration module associated with the vehicle; estimating real time distance of the vehicle along the route solely in response to both the GPS information and the vehicle speed information via the Kalman filter based estimator; and intermittently communicating a corrected value of speed bias to the speed bias based speed integration module and resetting the speed bias based speed integration module in response to both the corrected value of speed bias and predetermined critical milepost data that is distinct and independent of the GPS information and the vehicle speed information, such that the estimated real time distance is robust to cumulative errors and disturbances associated with both the GPS information and vehicle speed information to ensure the estimated real time location information is accurate. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A vehicle location determination system (LDS) comprising:
-
a computer or processor; a GPS processing module; a speed integrator module; a Kalman filter based estimator module;
wherein the computer or processor is programmed to estimate real time distance of the vehicle along a route via the Kalman filter based estimator that estimates the real time location in response solely to both GPS information from the GPS processing module and vehicle speed information from the speed integrator module; anda critical milepost module comprising a database of identifying entries that are distinct and independent from the GPS information and the vehicle speed information, wherein the computer or processor is further programmed to reset the speed integrator module based upon the identifying entries in the database such that the estimated real time distance is robust to cumulative errors and disturbances associated with both the GPS information and vehicle speed information to ensure an estimated real time location is accurate. - View Dependent Claims (23, 24, 25, 26, 27)
-
Specification