Mobile object positioning system
Patent 5598166 Issued on January 28, 1997. Estimated Expiration Date: 
April 1, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 1, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPositioning system for a vehicle Position and velocity estimation system for adaptive weighting of GPS and dead-reckoning information Odometer assisted GPS navigation method Method for in-field updating of the gyro thermal calibration of an intertial navigation system Patent #: 5527003 InventorsAssigneeApplicationNo. 626722 filed on 04/01/1996US Classes:342/357.06, Using Global Positioning Satellite (GPS or Glonass)701/213Using Global Positioning System (GPS)ExaminersPrimary: Blum, Theodore M.Attorney, Agent or FirmForeign Patent References
International ClassesH04B 007/185G01S 005/02 Foreign Application Priority Data1995-03-30 JPAbstractA mobile object positioning system includes a GPS signal receiver for receiving positioning radio signals from a plurality of satellites, calculating a present location of a mobile object in accordance with the positioning radio signal and outputting present location data at each of a plurality of calculating times. An electronic controller is provided for updating the present location data at each calculating time, storing the present location data, estimating an error of the present location data in accordance with the positioning radio signals and outputting error data at each estimating time. A vehicle velocity sensor is disposed on the mobile object for detecting the velocity of the moving mobile object and outputting a mobile velocity signal. The electronic controller determines a stationary condition of the mobile object in accordance with the mobile velocity signal and prohibits updating the present location data when a stationary condition of the mobile object is determined and a value of the error data at a present estimating time is larger than that at a last previous estimating time. | |
