| 摘要 |
<p>While transmitting an electromagnetic wave from a transmitting antenna 5 to, for example, a magnetostrictive resonator la buried in a road 14, the reception section composed of a reception amplifier 10 and signal processor 11 is inactivated, and after stopping transmission of the electromagnetic wave, the reception section is activated, and then the electromagnetic wave radiated by the magnetostrictive resonator is received and detected by a receiving antenna 8. In this method, a magnetostrictive resonator detection apparatus having a sufficient directivity and detection distance can be presented. Still more, the magnetostrictive resonator detection apparatus applying this detecting method is mounted aboard a vehicle 15, and plural magnetostrictive resonators (for example, 1a, 1b, 1c) are buried in the road 14, and by sequentially transmitting and receiving electromagnetic waves at different resonance frequencies thereof, and judging the configuration of the road and the vehicle, a safe traffic system is presented. <IMAGE></p> |
