| 摘要 |
<p>PROBLEM TO BE SOLVED: To correct a precise optical axis by specifying the memorized relative relation between the output of a car height sensor and the pitch angle of a vehicle by the two or more control lines with a different inclination and selecting a proper control line at each time. SOLUTION: In this auto-leveling device, the relation function is specified by two or more control lines B, C with a different inclination and an auxiliary sensor for detecting the absolute pitch angle of a vehicle against a horizontal surface is provided and in a calculation control part, a displacement amount added pitch angle added the change amountΔθof the absolute pitch angle found out through the auxiliary sensor to the relative pitch angleθB (θC) found out from the previously selected control line B (C) is compared respectively with the relative pitch anglesθb,θc found out from respective control lines B, C based on the this time output of a car height sensor and the drive of an actuator is controlled based on the relative pitch angleθb (θc) found out from the control line B (C) whose difference becomes minimum.</p> |
