Medium discrimination apparatus and discrimination method thereof

摘要

Disclosed are a medium discrimination apparatus and a discrimination method thereof. The medium discrimination apparatus comprises first and second magnetic sensor, a differential analog/digital converter and a controller. The first magnetic sensor senses a magnetic component printed at a specific position of an introduced medium and having a form of an analog signal containing a first noise generated from an internal circuit and a second noise generated from an operation of an actuator. The second magnetic sensor senses the first and second noises which are caused when the medium is transferred and has a form of an analog signal. The differential analog/digital converter performs a subtraction operation for the first and second noises sensed by the first and second magnetic sensors and convert result signals into one digital signal. The controller determines if the introduced medium is genuine or counterfeit according to the digital signal.

主权项

1. A medium discrimination apparatus comprising:
a plurality of magnetic sensors including
a first magnetic sensor configured
to be in contact with an introduced medium to sense a magnetic component printed on a specific position of the introduced medium, andto output a first analog signal corresponding to the sensed magnetic component, the first analog signal containing a first noise generated from an internal circuit and a second noise generated from an operation of an actuator, wherein the first and second noises are caused when the medium is transferred, anda second magnetic sensor configured
to not be in contact with the introduced medium to sense the first noise generated from the internal circuit and the second noise generated from the operation of the actuator without sensing the magnetic component of the introduced medium, andto output a second analog signal containing the first and second noises; a differential analog/digital converter configured
to perform a subtraction operation for the first and second analog signals outputted by the first and second magnetic sensors, andto convert a result signal into one digital signal; and a controller configured to discriminate whether the introduced medium is genuine or counterfeit according to the digital signal.