| 摘要 |
<p>PURPOSE: To provide the toll receiving system which normally charges vehicles running in the forward direction but surely prevents vehicles running in the opposite lane from being charged. CONSTITUTION: First and second antennas 9 to 12 are installed in the vicinity of a tollhouse in going directions of vehicles 2, and the charges are received without contacting by radio communication between these antennas and machines 21 mounted on vehicles 2. Information including different antenna numbers are transmitted from first antennas 9 and 11 and second antennas 10 and 12, and the machine 21 on each vehicle receives the transmission signals from antennas 9 to 12 ana recognizes the first antenna or the second antenna, whose communication area the vehicle first enters, by antenna numbers; and if the vehicle is running in the opposite lane, a reverse flag is set to prevent this vehicle from being charged. The machine 21 on the vehicle measures the time, when the reverse flag is set, by a timer; and when a certain time elapses or the vehicle enters the communication area of tollhouse antennas having different place information, the reverse flag is reset to set the communicatable state.</p> |
