APPARATUS FOR OVERLAP SENSING IN BILL DISPENSER

摘要

PURPOSE: An overlap detecting device of a bill dispenser is provided to improve detection precision by minimizing the error and the influence of a noise in an ultrasonic sensor receiver. CONSTITUTION: A controller(110) controls the generation of an ultrasonic signal to detect the overlap of a medium. A signal transmitter(130) generates an ultrasonic wave transmission control signal corresponding to a transmission signal generated from a signal processor(120). An ultrasonic wave transmitter(140) transmits an ultrasonic wave according to the ultra wave transmission control signal. An ultrasonic wave receiver(150) receives the ultrasonic wave from the ultrasonic transmitter on a medium transfer path. A signal compensator(160) adjusts the received signal from the ultrasonic wave receiver to a constant level.