Positioning system for a vehicle
Method and apparatus for processing data in a GPS receiving device in a road vehicle
GPS/self-contained combination type navigation system
Primary land arctic navigation system
Radio channel allocation based on location of mobile users
System for accurately determining the mileage traveled by a vehicle within a state without human intervention
Communication system and method for determining the location of a transponder unit
Position and velocity estimation system for adaptive weighting of GPS and dead-reckoning information
ApplicationNo. 304208 filed on 04/29/1999
US Classes:340/991, Position indication transmitted by vehicle after receipt of information from local station340/994, Vehicle's arrival or expected arrival at remote location along route indicated at that remote location (e.g., bus arrival systems)340/995.28, Including particular position/direction sensor701/201, Determination of travel data based on the start point and destination point701/207, Employing position determining equipment701/217Using dead-reckoning apparatus
ExaminersPrimary: Wu, David W.
Assistant: Trieu, Van T.
Attorney, Agent or Firm
International ClassG08G 001/123
AbstractA trip meter, such as a taximeter or a mileage meter for a commercial vehicle, such as a truck, are combined with an integral GPS receiver/computer which provides GPS position and time information. Odometer input pulses to the trip meter are accurately calibrated by using GPS position, velocity, and time information to generate corrected odometer pulses which are provided to the odometer input terminal of the trip meter. The GPS system is integrated into the trip meter for calibrating and cross checking of the input odometer pulses to provide reliable, consistent distance measurements by the trip meter. GPS position, velocity, and time information produce incontrovertibly accurate corrected, odometer input pulses and GPS time signals for the trip meter to precisely compute elapsed time and distance traveled. A backup dead-reckoning subsystem operates when the GPS receiver has service outages. The GPS receiver/computer system provides trip information such as information about when and where the commercial vehicle enters and leaves a predetermined zone, information establishing proof of a path followed by the commercial vehicle, information about operation within speed limits, and information verifying operation within a certain geographic area. A data recorder records the trip information.
Field of SearchVEHICLE POSITION INDICATION
With map display
Position indication transmitted by vehicle after receipt of information from local station
Vehicle's arrival or expected arrival at remote location along route indicated at that remote location (e.g., bus arrival systems)
Determination of travel data based on the start point and destination point
Employing position determining equipment
Using Global Positioning System (GPS)
Using dead-reckoning apparatus