【作者】 郎家峰；

【导师】 吴晓琳；

【作者基本信息】 南京航空航天大学 ， 机械电子工程， 2005， 硕士

【摘要】 硬币检测清分系统是对高速通过的硬币进行识别、计数,同时对伪币、残币进行剔除的系统。它是硬币的分类机、计数机、包装机、销毁机等众多硬币处理器具的研发基础。 本文从电涡流传感器的原理和特性出发,根据中国硬币体系中各币种的尺寸、材质等特征,设计了由高频反射式和低频透射式组成的双路电涡流传感器来分别检测硬币的不同特征参数,讨论了不同结构形式的电涡流传感器的检测相应硬币特征参数时的工作特性,并设计了相应的传感器电路。在整个硬币清分系统的系统硬件机构设计上,采用由数据采集、数据处理和人机接口三个系统模块构成的多 CPU 结构设计,三个系统模块分工明确,各自独立工作,同时又通过双端口 RAM 传递命令和数据的方式进行相互协调,密切配合。在以 CPU1为核心的人机接口模块系统中,设计了液晶屏显示和薄膜行列式键盘模块节电机驱动模块。在以 CPU2 为核心的数据处理模块系统中,设计了适合本系统的数据处理算法。在以 CPU3 为核心的数据采集模块系统中,设计了传感器信号发生、调理电路及由计数器组成的数据采集电路。在软件上,设计了液晶显示、按键处理、信号特征值提取等算法。同时,通过软硬件结合的方法较好地解决了多CPU 通信的问题,从而使整个硬币清分系统处于协调、稳定的工作状态。更多还原

【Abstract】 The system for detection and differentiation of the coin counts the high-speed coin that passes, rejects to the bogus money, incompletes coin at the same time. It is the foundations of numerous researches and development of dealing with utensil of coins, such as sorting machine, counting machine, packer, destroying machine of the coin, etc... This article spreads from the principle and characteristic of electric whirlpool sense, according to the characteristics, such as size, material of Chinese coin system, designs double-way electric whirlpool sensor made of low frequency transmission electric whirlpool sensor and high frequency reflection electric whirlpool sensor to detect different characters of coins. The article discusses the performance characteristics of the two kinds of sensors when they were used to detect corresponding coins and designs the corresponding sensor circuit. The system, multiple-CPU system, comprises three modules of data gathering, data processing, and man-machine interface. On the one hand, these modules work independently and every module has its definitude work. On the other hand, they cooperate closely and transmit data and command one another through dual-port-RAM. In the man-machine interface module taking CPU1 as the core, the article reject and show that drives module with the membrane determinant keyboard module section electrical machinery after designing the liquid crystal. In the module system of data processing taking CPU2 as the core, have designed the data processing algorithm of this suitable system. In the module system of data gathering taking CPU3 as the core, the article describes the circuit of signal-arising of sensors, signal-converting of sensors, and data gathering using counters. In the software, we have designed the programs of LCD display, button dealing with, and the eigenvalue picking-up. Meanwhile, the problem of communication of multi CPU system was solved well by the combination of hardware and software, thus make the clear subsystem work in a coordinating, steady state.更多还原