Fuzzy identification of stuck banknotes based on multi-sensordouble use
Wei Xu · Journal of Zhejiang University of Technology · 2004
The main reason which causes the counting failure of bank machines is stuck banknotes. Stuck banknotes are subdivided into two types: continuous banknotes and double banknotes. The speed sensor together with the infrared sensors can measure the width of banknotes, correct errors caused by banknote slanting, and print holes. So the machine can not only check out continuous banknotes but also find out misshapen chasm banknotes. The accuracy of measurement is not lower than 2 mm. At the same time, the infrared signals through the banknotes are magnified and converted into digital signals by ADC.The membership function of banknotes is constructed on real time by sliding windows so that double banknotes can be checked out. Designed in this way, the machine can count banknotes of any countries such as USD, EURO, HKD, RUB, and AUD without manual selecting , its accuracy being better than 10~(-5) designated in GB16999-1997.