ROAD SURFACE CONDITION DETERMINATION METHOD, ROAD SURFACE CONDITION OUTPUT METHOD, ROAD SURFACE CONDITION DETERMINATION DEVICE, AND ROAD SURFACE CONDITION OUTPUT DEVICE

摘要

In this road surface condition determination method, the suspension pressure of a moving dump truck (20) is detected, and the maximum amplitude (PP) and frequency (PPHz) of detection values (FR, FL, RR, RL) of the suspension pressure within a predetermined time are obtained to determine a road surface condition on the basis of the maximum amplitude (PP) and the frequency (PPHz).