Medium processing apparatus, medium processing method, and financial device
A medium processing apparatus is provided. The medium processing apparatus comprises an MR sensor, one or more differential amplifiers, a storage, and a controller. The MR sensor comprises a plurality of detection elements configured to detect a magnetic component of a medium. The one or more differential amplifiers receive respective output signals of two detection elements among the plurality of detection elements to subtract and amplify the received signals. The storage stores various pattern information of a magnetic component signal for the medium. The controller compares the pattern information, stored in the storage, with magnetic component signals respectively outputted from the detection elements and a magnetic component signal outputted from the one or more differential amplifiers to determine authenticity of the medium.
1. A medium processing apparatus comprising:
a magnetic resistance (MR) sensor comprising a plurality of detection elements configured to detect a magnetic component of a medium;
one or more differential amplifiers configured to receive respective output signals of two detection elements among the plurality of detection elements to subtract and amplify the received signals;
a storage configured to store various pattern information of a magnetic component signal for the medium; and
a controller configured to compare the pattern information, stored in the storage, with both magnetic component signals respectively outputted from the detection elements and a magnetic component signal outputted from the one or more differential amplifiers to determine authenticity of the medium.
2. The medium processing apparatus of claim 1 , wherein the two detection elements are adjacent.
3. The medium processing apparatus of claim 1 , wherein the one or more differential amplifiers output a signal which is obtained by subtracting an output signal of a first detection element of two detection elements from an output signal of a second detection element of the two detection elements to amplify the subtracted signal, and a signal which is obtained by subtracting the output signal of the second detection element from the output signal of the first detection element to amplify the subtracted signal.
4. The medium processing apparatus of claim 1 , wherein the detection elements are comprised as even number.
5. The medium processing apparatus of claim 1 , wherein,
the detection elements are comprised as odd number, and
an output signal of one of the detection elements is not delivered to the one or more differential amplifiers.
6. The medium processing apparatus of claim 1 , further comprising an image sensor acquiring image information of the medium,
wherein the controller compares characteristic information for denomination of the medium which is acquired with the magnetic component signals and characteristic information for denomination of the medium which is acquired with the image information to determine authenticity of the medium.
7. A financial device comprising:
a transfer path for transfer of a medium; and
a medium processing apparatus configured to recognize a medium which is transferred along the transfer path of the medium,
wherein the medium processing apparatus comprises:
a magnetic resistance (MR) sensor comprising a plurality of detection elements configured to detect a magnetic component of the medium;
a signal processor configured to process signals respectively outputted from the detection elements; and
a controller configured to determine authenticity of the medium by using both magnetic component signals respectively outputted from the detection elements and the processed signals.
8. The financial device of claim 7 , wherein the signal processor subtract and amplifies signals respectively outputted from two adjacent detection elements.
9. The financial device of claim 7 , wherein the signal processor outputs a signal which is obtained by subtracting an output signal of a first detection element of two detection elements from an output signal of a second detection element of the two detection elements to amplify the subtracted signal, and a signal which is obtained by subtracting the output signal of the second detection element from the output signal of the first detection element to amplify the subtracted signal.
10. The financial device of claim 7 , wherein,
the medium processing apparatus further comprises a storage storing various pattern information of a magnetic component signal for the medium, and
the controller compares the pattern information, stored in the storage, with magnetic component signals respectively outputted from the detection elements and a signal outputted from the signal processor to determine authenticity of the medium.
11. A medium processing method comprising:
detecting a plurality of first magnetic component signals for a plurality of regions of a medium;
detecting one or more second magnetic component signals by processing the detected signals; and
comparing a pre-stored magnetic component signal for each medium with both the plurality of first magnetic component signals and the one or more second magnetic component signals to determine authenticity of the medium.
12. The medium processing method of claim 11 , wherein the detecting of one or more second magnetic component signals comprising subtracting and amplifying the plurality of first magnetic component signals.
13. The medium processing method of claim 12 , wherein the processing the detected signals comprising mutually subtracting and amplifying two first magnetic component signals to output two second magnetic component signals.