Study Of Paper Currency Discrimination And Sort System Based On CIS Sensor

Paper currency sorter is an advanced financial processing device integrated with optics, mechanics and electronics. Its main function is to recognize the denomination and face direction of the bills, and to distinguish the newer bills from the older ones and so on. Henceforth, paper currency sorter may satisfy the general operation of drawing out bills for ATM, the selection of reusable bills, and the elimination of fragmentary bills automatically. In this paper, against the problems of complicated hardware design and poor performance of domestic bill sorters, and based on the summarization of correlative contents of paper currency sorters, combined with the characters of paper currency sorter requiring high running speed and reliability, on the basis of embedded MCU/MPU, image sensor technology and digital image processing and recognition and so on, author brings forward a blue print for the paper currency sorter system, and introduces a new innovation of surveillance of RMB through recognition of RMB serial numbers, at last, does some experiments for demonstration. The paper consists of the following parts:1. Discuss the history background, research status inside and outside and development trend in the future of paper currency sorter, analyze realization techniques of its functions, and summarize the shortages of domestic bill sorter. On the basis, bring forward one realizable scheme of paper currency sorter.2. Against the high requirement of speed and reliability in paper currency sorter, search after one arithmetic that is the same with RMB image processing and recognition. Firstly, with the main study of the digital image processing, RMB characters are analyzed. Then, methods of bill image processing and recognition are introduced in order to lay down the solid base for software arithmetic design in the real paper currency system.3. A new solution for the system about hardware and software is presented. First, from the point of view of the realization of system functions, compartmentalize several modules of its function; second, on the basis of these modules, design its hardware circuits and software flows; at last, give the detailed realization of paper currency sorter.4. The test results from the system platform are analyzed to evaluate the system's performance. On the basis of the repeating tests on the realized platform, by adjusting the parameters of the system, the high performances are realized.