| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tollgate guiding device for properly guiding a tollgate booth where the payment of charge is performed to an operator from among a plurality of tollgate booths arranged along a traveling direction, and for making a vehicle smoothly pass through. <P>SOLUTION: This tollgate guiding device is provided with sensors 1 to 3 for detecting a vehicle in the neighborhood of a plurality of tollgate booths arranged along the traveling direction, a control part 5 for controlling the contents of a voice message according to the detection outputs of the sensors 1 to 3, a voice reproducing part 6 for outputting a voice signal expressing the voice message corresponding to the control of the control part 5, modulators 7 to 10 for generating super-directive voice signals by modulating the voice signal so that an ultrasonic wave can be turned to be a carrier wave, and speakers 15 to 18 having super-directivity for inputting the super-directive voice signal, and for emitting the ultrasonic wave to be demodulated into the voice message in air to a vehicle in the neighborhood of the tollgate booth. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
