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DSRC car-mounted equipment

  • US 6,337,622 B1
  • Filed: 07/11/2000
  • Issued: 01/08/2002
  • Est. Priority Date: 04/06/2000
  • Status: Expired due to Fees
First Claim
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1. A DSRC car-mounted equipment comprising:

  • a main body of a car-mounted equipment having a control unit and an antenna unit for executing radio communication with an on-the-road equipment installed on a road on which a vehicle travels;

    information output means connected to said control unit;

    a checking unit arranged in the vehicle so as to be positioned between said antenna unit of the car-mounted equipment and a radio equipment of the road side of said on-the-road equipment, and having a checking circuit unit and a checking antenna unit for executing radio communication with said antenna unit of the car-mounted equipment; and

    an antenna-judging means for judging the communication ability of said antenna unit of the car-mounted equipment based on the communication state of check signal waves between said antenna unit of the car-mounted equipment and said checking antenna unit;

    wherein said antenna-judging means produces an alarm signal when the communication ability of said antenna unit of the car-mounted equipment is smaller than a predetermined value; and

    said control unit of the car-mounted equipment drives said information output means in response to said alarm signal to produce an alarm.

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