System and method for the detection of soiling in bank notes

摘要

A method for handling soiled bank notes is disclosed. The method includes directing a bank note to an ultraviolet detector; transmitting an ultraviolet signal from the ultraviolet detector to the bank note; receiving a reflected ultraviolet signal from the bank note at the ultraviolet detector; analyzing the reflected ultraviolet signal; identifying a soiling level for the bank note based on analysis of the reflected ultraviolet signal; and handling the bank note based on the identified soiling level. Analyzing the reflected ultraviolet signal can include comparing a characteristic of the reflected ultraviolet signal with calibration data. The calibration data can be stored in a computer-readable medium. The bank note is identified as a soiled bank note if the identified soiling level exceeds a threshold soiling level.

主权项

1. A method for handling soiled bank notes comprising:
directing a bank note to an ultraviolet detector; transmitting an ultraviolet signal from the ultraviolet detector to a white portion of the bank note; receiving a reflected ultraviolet signal from the white portion of the bank note at the ultraviolet detector; analyzing the reflected ultraviolet signal; identifying biological soiling for the bank note based on analysis of the reflected ultraviolet signal indicating a wavelength of approximately 470 nanometers; and handling the bank note based on the identified biological soiling.