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System for measuring current position and/or moving direction of vehicle

  • US 4,305,077 A
  • Filed: 12/11/1979
  • Issued: 12/08/1981
  • Est. Priority Date: 05/30/1979
  • Status: Expired due to Term
First Claim
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1. A system for measuring the current position and/or the moving direction of a moving vehicle, comprising:

  • transmitting means installed at a reference location, said transmitting means comprisingfirst transmitting means for transmitting an azimuth scanning signal being scanned in succession in different directions,second transmitting means for transmitting a location information signal representing said reference location of said transmitting means, andthird transmitting means for transmitting an azimuth associated information signal containing information concerning a predetermined azimuth,receiving means for receiving said azimuth, scanning signals at three positions spaced apart from each other by predetermined distances and for receiving said location information signal and said azimuth associated information signal at at least one of said three positions, andinformation processing means borne on said moving vehicle, said information processing means being structured to evaluate at least one of the current position and the moving direction of said moving vehicle based on the information concerning the respective time periods from receipt of said azimuth associated information signal until receipt of said azimuth scanning signal at said three positions, said location information and the information concerning said predetermined distances between said three positions.

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