Patent ID: 6337622
Filing Date: 2002-01-08
Classification: G07B,G07C

Abstract:
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.