The research contents of this paper includes as follows : firstly , design a new type reader based on ti s6700 reader ic and try to enhance the reading distance through adding power amplifier ; secondly , adopt the idea of gpio simulation to produce spi timings to drive s6700 . secondly , overcome the shortcoming of general mcu spi port ; thirdly , design the rs232 / rs485 full duplex conversion module , mmi interface in the system ; fourthly , analyze the rfid system communication protocol iso15693 and find out the working processes and realization of the instruction ; lastly , discuss the communication safety and accidental factors including the checkout and collision design , illustrate the realization of crc and anti - collision arithmetic theory 本论文的主要研究内容包括: (一)设计基于s6700阅读器芯片的新型阅读器,通过使用对中高频阅读器外加功率放大模块的方法,实现较远距离通信。 (二)采用单片机通用口三线模拟的方法模拟通用spi口时序,克服其不可位操作的缺点,实现对s6700的驱动。 (三)在rfid系统中集成设计了rs232 / rs485通讯模块、液晶显示模块等,着重说明了其软硬件实现方法。
Based on the hypothesis of brands , this thesis presents two off - line electronic cash system applied to small payment : one is an off - line nondivisible electronic cash system with complete anonymity , and the other is an off - line nondivisible electronic cash ' system with repealed anonymity . the two systems can solve the bottleneck problem of bank server . furthermore , based on the concept of virtual debit as well as the payment demand of pay - per - use electronic commerce and mobile co mmerce , this paper designs a micro - system npay , which can solve the problem of extra - consuming , greatly reduce the system communication overhead , and the consumer can anonymously consume 基于brands假设,设计了两个适用于小额支付的离线电子现金系统:一个是具有完全匿名性的离线不可分电子现金系统,另一个是可撤消匿名性的离线不可分电子现金系统,这两个系统都较好地解决了银行服务器的瓶颈问题;针对即付即用( pay - per - use )类型电子商务和移动商务的支付需求,基于“虚借记”的概念,设计了一个微支付系统npay ,较好地解决了消费者超额消费问题,系统的通讯开销也大大减少,并且消费者可以匿名消费。
In fore part of the article , sr theory and any gene which affect sr happening are generally recommended . we also research deeply about condition of sr phenomenon happening . faint signal detection system communication between dsp processing system and pc managing system are described in the detail in back of this article 本文前半部分简略介绍了随机共振理论及各种影响随机共振因子之间的相互关系,对随机共振发生的条件进行了深入研究;本文后半部分就小信号检测系统的随机共振算法以及dsp系统与pc机间的通信进行了详细的描述。
Accordingly , this paper presents the concept of adaptive soft - bus technique . with the help of corba technology . adaptive soft - bus technique deals with how to construct a military distributed real - time system communication platform to resolve the problem of sharing and integration of complex , distributed , heterogeneous , real - time data and functional modules 为此,本文提出了“自适应软总线”的概念,利用corba技术,研究在新型军用分布实时系统中如何构建一个通信平台,用于解决复杂、分布、异构的实时数据和功能模块的共享与集成。
By adopting the layered architecture , two - lever state machine , message queue based publish / subscribe pattern and rules expressed in xml , by using technologies involved in activex , xml and distributed components , icall - aldp provides application developer with supports as rule - based flow process , asynchronism and concurrent message process , external system communication - oriented protocol - transform , and dynamic expand of components 通过使用activex控件的动态加载机制、连接外部系统的通信协议转换机制和基于元数据的柔性机制,增强了平台的可扩展性。在设计和实现中采用了activex 、 xml 、设计模式以及分布式构件等技术,实现了基于规则的流程处理、支持并发与异步的消息处理以及构件动态扩展的功能。