| 摘要 |
<p>PURPOSE:To simplify the wiring while facilitating the modification accompanied with the extension of antenna unit when a plurality of antenna units are controlled by means of one or a plurality of controllers. CONSTITUTION:Gates 25, 26 are installed at predetermined positions of a toll- road 20 and antenna units 27a-29c are set for respective lanes 21a-21c, 22a-22c. Each group of three antenna units is controlled through controllers 37-39 connected commonly with an LAN line 36. The controller 3-7 delivers a transmission permit signal to each antenna unit 7a-29c and transmits the results of communication with the IU 24 of an automobile 23 to the controller 37-39 for each group. This system facilitates extension or modification of antenna unit or controller while simplifying the wiring thus realizing an intelligent system.</p> |
