Method and system for a data interface for aiding a satellite positioning system receiver
View Patent ↗The invention described herein relates to aiding a Satellite Positioning System (SPS) receiver of a platform with a data interface to the platform data. The platform, for example, could be a vehicle, ship, aircraft, or a pedestrian. The SPS receiver would be used to track the location of the platform. The data interface would facilitate access by the SPS receiver to the data of the platform, and the SPS receiver in turn could provide SPS data (such as position, speed, and heading) to the platform. A further aspect of the invention includes hardware or software used by the data interface and the SPS receiver to provide, format, time-stamp, synchronize, and match platform data or SPS receiver data.
1. A method for providing data to a receiver for aiding in vehicle location, comprising:
receiving vehicle data on a vehicle OBD-II data bus, the vehicle data being provided by vehicle sensors including individual wheel speed sensors;
collecting the vehicle data from the vehicle OBD-II data bus by means of a data interface;
determining a dead-reckoning-derived position for the vehicle using the collected vehicle data;
determining a Satellite Positioning System (SPS)-derived position for the vehicle using an SPS receiver;
comparing the SPS-derived position with the dead-reckoning-derived position; and
calibrating the vehicle sensors by determining scale factors to be applied to the vehicle data responsive to the comparison of the SPS-derived position with the dead reckoning-derived position.
2. The method of claim 1 , wherein the vehicle data is from a plurality of sources.
3. The method of claim 1 , wherein the vehicle data includes both a velocity and a heading for the vehicle.
4. The method of claim 1 , wherein the vehicle data is collected over a predetermined cycle.
5. The method of claim 1 , wherein the vehicle data includes turn rate data and the scale factors includes a turn rate scale factor.
6. The method of claim 5 , further comprising: applying the turn rate scale factor to the turn rate data.