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Vehicle monitoring system

  • US 4,728,922 A
  • Filed: 10/29/1985
  • Issued: 03/01/1988
  • Est. Priority Date: 03/21/1985
  • Status: Expired due to Fees
First Claim
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1. A vehicle monitoring system comprising:

  • a vehicle monitoring station having a radio transmitter, a radio receiver, means for identifying a vehicle from a reply code transmitted to said receiver from said vehicle, means for requesting via said transmitter the transmission of stored data concerning said vehicle from said vehicle after receipt of said reply code and means for sending instructions to a driver of said vehicle via said transsmitter that said vehicle is either to stop at said station or not to stop and proceed past said station;

    means for receiving a radio transmission from said transmitter located in the general vicinity of the vehicle at said vehicle monitoring station, said receiving means being adapted for installation in a vehicle and including carrier detect signal means for indicating the transmission of an interrogation signal from said transmitter and a phase detector for processing the the received radio transmission;

    a central processing unit connected to said receiving means, adapted to receive and process information sent from said receiving means, capable of storing information received or produced by said unit, and producing said reply code upon receipt of said interrogation signal;

    means for displaying or indicating to said driver information or instructions stored in or received by said central processing unit, including said instructions that said vehicle is either to stop or not stop and proceed;

    means for sensing or measuring physical parameters of said vehicle, including the weight thereof, and converting the sensed or measured parameters to electrical signals indicative thereof;

    means for conveying said electrical signals to said processing unit for storage or processing;

    means for transmitting said reply code and subsequently said stored information concerning said vehicle by radio transmission from said processing unit to said vehicle monitoring station in the vicinity of said vehicle, said central processing unit permitting said transmission of the reply code only after receipt of said interrogation signal and permitting said subsequent transmision of said stored information only after receipt of a request for the transmission of same from said monitoring station; and

    power supply means for said monitoring system.

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