VEHICLE HEAD LAMP OPTICAL AXIS DIRECTION AUTOMATIC ADJUSTMENT DEVICE

摘要

A storage unit (12) stores: a front sensor output signal characteristic and a rear sensor output signal characteristic which have been corrected by a front sensor output signal characteristic correction value and a rear sensor output signal characteristic correction value, respectively, for cancelling the affect of an error factor such as deformation of a vehicle body frame; and a known predetermined calculation expression. A calculation unit (11) acquires a front and rear vehicle height change reflecting the deformation of the vehicle body frame according to a front sensor output signal of a front vehicle height sensor (2) and a rear sensor output signal of a rear vehicle height sensor (3) as well as the corrected front sensor output signal characteristic and the rear sensor output signal characteristic. By using the obtained vehicle height change and a predetermined calculation expression, the optical axis control amount ? is calculated.