| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a road monitoring system for detecting the number of passing vehicles, travel speed and vehicle weight, which are required for road management, by using one type of sensor. <P>SOLUTION: Oscillation sensors S1 and S4 are installed in a roadbed of a road by leaving a space in a travel direction of the vehicle. The number of oscillation detection times by the sensor S1 or S4 is counted and the number of the passing vehicles is obtained. Travel speed of the vehicle is obtained from a detection time difference by the sensors S1 and S4. Weight of the vehicle is estimated and obtained from a size of amplitude of detected oscillation and from travel speed. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
