接触是预付费燃气表设计.doc

摘 要 随着信息社会的到来，IC卡技术以其广泛的应用领域和巨大的产品市场成为我国信息产业的一大热点。与此同时，我国的燃气收费管理仍然采用人工抄表的方式，此方法严重影响居民生活，抄表既麻烦又劳累，工作量大，收费时间长，人力浪费严重;居民交费不方便，收费也不易管理，效率低，特别是对欠费者难以限制。因此，智能IC卡燃气表对于城市居民生活以及燃气公司的收费管理有重大的现实意义。 本文在了解了燃气表的现状，分析了技术上的优缺点，针对当前燃气计量收费的要求和特点，设计了以52系列单片机为控制核心，以IC卡为信息载体的智能IC卡燃气表。整个系统包含硬件的选择和制作、软件的设计和调试，以及系统的软件和硬件的联合调试。 硬件系统主要包括:52系列单片机、液晶显示、燃气流量信号的检测、电气阀驱动、存储器接口及看门狗、IC卡读写、电源检测等模块;软件主要包括:实时采集、正确计量、故障的查询、电源电压检测、掉电数据存储、阀门驱动、读写IC卡、报警显示功能等部分。 系统的软件和硬件的调试表明系统实现了实时采集燃气流量信号、控制用户用气情况、正确计量、实时显示剩余气量并在剩余气量不足时进行声音报警、电源检测以及声音报警提示电池欠压、掉电数据存储功能、气量累积、阀门驱动等功能。 关键词:预付费；燃气表；接触式; Abstract With the coming of information society, IC card technology becomes a hot spot in the field of information industry because of its widely application and vast product market. Meanwhile, the manual gas meter reading is still adopted in gas charging, which seriously affects the residents life. It is inconvenient, tiring and also with heavy workload, time-wasting, manpower-wasting, low efficiency, and disordered management, especially for the persons who dont pay their bills on time. Thus, the application of intelligent IC card has significant realistic meaning for the residents life as well as for the gas charging management. This paper firstly analyses the present status of gas meter, the advantages and disadvantages in technology, then designs the intelligent IC card with the control core of 52 series SCM and supported by IC card. The whole system consists of the choice and production of hardware, the design and test of software and co-test of hardware and software of the system. The hardware system mainly includes the followings: 5 2 series SCM, the 1iquid crystal display, the test of gas flow signal, memory interface, and watchdog, IC card read-write, power testing, etc. The software mainly includes the followings: real time collection, accurate measurement, breakdown inquiry, power pressure testing, power failure data storage, valve actuation, read-write IC card, alarming display, etc. The testing of hardw