| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily and surely detect a defect by departing from first and second wheel rotation numbers, obtaining an actual slip number, and in the case that prescribed conditions are present, detecting an error when an actual accumulated slip number exceeds a threshold value. SOLUTION: A sensor 101 detects the rotation number of a left rear wheel, the sensor 102 detects the rotation number of a right rear wheel, the sensor 103 detects the rotation number of a left front wheel and the sensor 104 detects the rotation number of a right front wheel. Departing based on the compared result of the four detected wheel rotation numbers, a control signal setting part 140 calculates signals to be supplied to an adjustment operation part 110. That is, the sensor signals of the sensors 101-104 are supplied to an evaluation device 130, the actual slip number is obtained, and in the case that the prescribed conditions are present, the actual slip number is accumulated and the error is detected when the accumulated slip number exceeds the threshold value. Thus, the defect is detected by this simple and sure method.</p> |
