A级点钞机纸币边缘的单向扫描定位新方法  

One-way Scanning Detection of Paper Currency Edge in Class A Currency Counting Machine

作　　者：罗颖[1] 郭涛[1,2] 刘霖[1] 黄柄权 宋昀岑[1] 叶玉堂[1] 刘永[1] 

机构地区：[1]电子科技大学现代光电测控及仪器实验室(摩米实验室),四川成都610054 [2]成都术有科技有限公司,四川成都610054

出　　处：《计量学报》2016年第1期19-23,共5页Acta Metrologica Sinica

基　　金：国家自然科学基金(61205004);粤港招标关键领域重点突破项目(w0510116);粤港招标关键领域重点突破项目(w0511206);总装预研基金(9140A01020507DZ0215)

摘　　要：针对新国标A级点钞机900张／min纸币的高速图像处理需求，提出了一种基于现场可编程逻辑门阵列和双核数字信号处理器的纸币边缘实时定位新方法。该方法用单向扫描代替了传统的4向扫描，将一维边缘信息编码过程与图像采集过程合二为一，通过双核实现了信息处理的并行性，极大地提高了纸币边缘定位的效率。实验结果表明，使用该方法将几十ms的纸币边缘定位耗时缩短至μm级，定位效率相比4向扫描定位法提高了50．5倍，对于新国标A级点钞机检钞速度的提高具有重要价值。A real-time one-way scanning edge detection on a field programming gate array with dual - core digital signal processor platform is proposed to meet the high image processing speed needs of 900 paper currency per minute in class A currency counting machine. Real-time one-way scanning edge detection is used instead of usual 4-way scanning edge detection, and the field programming gate array is used to combine the encoding process of one-dimensional edge information with the process of image acquisition. With the dual-core digital signal processor the edge information can be processed in parallel. And so, the efficiency of the edge detection could be improved greatly. The experimental results show the new method can shorten the tens of milliseconds with the 4-way paper currency edge scanning method to microsecond level. The detection efficiency is increased to 50.5 times of the 4-way scanning edge detection method.

关 键 词：计量学 边缘实时定位 A级点钞机 现场可编程门阵列 数字信号处理器 接触式图像传感器 

分 类 号：TB96[机械工程—光学工程]