The Design And Implementation Of The Software System Of Two-Outlet Paper Currency Sorter

Paper currency automatic sorting is an inevitable trend of the bank work of paper currency's sort. By using sensitive and accurate paper currency sorter, it can make the heavy work of paper currency sort simple quick and credible.The main content of this paper is about the design and implementation of the software system of paper currency sorter, including the program of sorting and the program of control. Because of the superior requirement of speed of the machine, we use some special techniques to ensure the system's real time requirement.The program of sorting use some concepts and techniques of image processing and pattern recognition to implement edge detection, geometrical adjusting, feature extraction and training, classify of paper currency's image. We sample from parallel edges in equal distance, and we sample again from sample points set by slope and get fitting points set, then we use least square method to fit straight line with the fitting points set. The edges of paper currency image can be detected accurately and quickly by above method, and it is valid to some image with a certain defection. We use quick algorithm in Geometrical adjusting. The feature extraction is based on overlap gridding feature in valid area of image, and it can enhance the stability of feature. By using dot product as the distance function of distance classifier, we implement paper currency's classify.The program of control uses some concepts and techniques of Operating System to manage some simultaneous event. By using two time bases, it can manage events about the true time and synchronize the distance of paper currency's movement, know and control the movement of paper currency accurately. We implement the automatic adjusting of clearance, and it ensures the quality and efficiency. We treat the events that have different requests in real time requirement with program query and interrupt. We inspect the whole movement of paper currency and detect the error of classification led by the hardware of machine.Both the sorting program and control program are written by C language, which is efficient, fast, and easy for maintenance and upgrading. The total code number is more than 10,000. After completing the whole control program source code and improving some of the sorting program, we run the paper currency sorter...