| 摘要 |
<p>PURPOSE: To provide a vehicle detector which is not affected by the vehicle running on an adjacent lane, and further is capable of detecting all the vehicles such as motorcycles shaded with the running vehicle. CONSTITUTION: In the charge collecting system of a toll road, the system is provided with (A) a frame 2 which strides all over the whole of a road having plural lanes and is provided in a vehicle advance direction, (B) plural light emitting functions arranged at the proper places of the frame 2 and a laser radar 1 which is also provided with a light receiving function and perpendicularly irradiates optical pulses on the road surface on the lower part and (C) an arithmetic circuit determining the height of a passing vehicle from the difference of the reflection time from the road surface of the optical pulse that the laser radar 1 irradiates and the reflection time of the vehicle passing on the road surface and measuring the kind and number of vehicles.</p> |
