ROAD SURFACE CONDITION DETERMINING METHOD, ROAD SURFACE CONDITION OUTPUTTING METHOD, ROAD SURFACE CONDITION DETERMINING DEVICE AND ROAD SURFACE CONDITION OUTPUT EQUIPMENT

摘要

In pavement state determination method of the invention, the suspension pressure of dump truck (20) in detection traveling, find out the detected value (FR of the suspension pressure, FL, RR, RL peak swing (PP) and frequency (PPHz)) at the appointed time determine pavement state based on the peak swing (PP) and the frequency (PPHz).