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Integrated taximeter/GPS position tracking system

  • US 5,917,434 A
  • Filed: 06/15/1995
  • Issued: 06/29/1999
  • Est. Priority Date: 06/15/1995
  • Status: Expired due to Term
First Claim
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1. A calibrated electronic taximeter system for a taxi, comprising:

  • a GPS receiver/computer system having means for receiving input odometer pulses from an odometer, said GPS receiver/computer system providing GPS information as output signals;

    interface means for receiving the GPS information from the GPS receiver/computer system and for providing continuously calibrated odometer output pulses as a function of the received GPS information, when the GPS information is available;

    a taximeter having means for receiving calibrated odometer output pulses from the interface means and for receiving the GPS information, said taximeter having means for computing and displaying a taxi fare from the calibrated odometer output pulses and GPS information provided by said GPS receiver/computer system;

    wherein the GPS receiver/computer system includes dead reckoning means for providing location information to the GPS computer system during GPS receiver system service outages;

    means for providing trip information;

    means for recording the trip information; and

    wherein the trip information includes information selected from the group consisting of information about when and where a vehicle enters and leaves a predetermined zone, information establishing proof of a path followed by a taxi, information about operation within speed limits, and information verifying operation within a certain geographic area.

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