MOTOR REVOLUTION NUMBER DETECTING DEVICE, CONTROL DEVICE FOR SIDE-VIEW MIRROR OF AUTOMOBILE EQUIPPED WITH THE SAME, AND DETECTING METHOD FOR MOTOR REVOLUTION NUMBER

摘要

PROBLEM TO BE SOLVED: To provide a motor revolution number detecting device which can highly precisely detect the motor revolution.;SOLUTION: This motor revolution number detecting device 13 is equipped with a signal generating unit 30 which generates a specified signal every time a motor 5 rotates by a specified number, and a signal outputting unit 17 in which the signal from the signal generating unit 30 is input, and which rectify-converts the signal into a pulse signal of a specified pulse width and outputs it. The signal outputting unit 17 is constituted in such a manner that the pulse width of the pulse signal may become shorter when the motor rotation speed is relatively higher than when the motor rotation speed is relatively lower.;COPYRIGHT: (C)2004,JPO&NCIPI