The 2nd wiper blade Drive with the 1st wiper blade

摘要

PROBLEM TO BE SOLVED: To realize the smooth operation while restricting the fluctuation of wiping cycle by separately driving a first and a second motors so that a difference between the target angle difference and a real angle difference at a first and a second wiper blade sides is reduced so as to reduce a difference between the real speed and the target speed. ;SOLUTION: A device is provided with a first wiper blade side real angle difference computing means for computing a real position angle difference between both wiper blades 2a, 2b on points of a DR side and an AS side on the basis of the real position angle of both the wiper blades 2a, 2b and for correcting that value at need so as to compute the DR side real angle difference information, and provided with a second wiper blade side real angle difference computing means for similarly computing the AS side real angle difference. The target angle difference between both the wiper blades 2a, 2b at the real position angle and the real angle difference are compared with each other, and output of each motor 3a, 3b for reducing a difference between them so as to reduce a difference between the target speed and the real speed is computed, and the computed output is indicated to each motor driving device 10a, 10b.;COPYRIGHT: (C)1999,JPO