【作者】 冯秀丽；

【导师】 韩建国；

【作者基本信息】 北京化工大学 ， 检测技术与自动化装置， 2001， 硕士

【摘要】 本文首先介绍了串行通信现状、电话网的发展现状、发展前景及本课题的意义。其次，结合电话网的原理进一步分析了污水管理系统中的数据传输过程。另外，介绍了该系统的总体设计思想，软硬件设计方法，并具体给出了设计的方案。在本课题中，作者独立完成了系统的软件设计及调试过程，该系统已经通过了公司的验收，运行良好。最后，基于调试的经验以及参考文献给出了有关系统可靠性设计的一些重要的建议，并列出了作者调试本系统时积累的经验，供大家参考。 本系统经过设计调试已经达到了公司的几点要求： 1、子站能够不停地并行接收流量积算仪发送过来的数据，并能够使用EEPROM存储发送过来的数据，并实时记忆当前地址，使得下次上电从当前地址开始存放下一组数据，数据存放采用循环覆盖形式。主机需要数据时，可以按下主机程序中的要求发送按钮，并且用户可以设定所需要数据的组数。 2、主机可自动定时查询子站的数据，并将其追加到数据文件中，也可以进行手动查询，手动查询时可以自行设定数据组数。 3、可以提供各种形式的报表、曲线图等。 4、数据传输过程中基本无中断问题发生，出现缺数的情况下，可以使用手动拨号进行补齐。更多还原

【Abstract】 At first, the state and prospect of serial communication and phone networks and the meaning of this thesis are introduced. Following, according to theory of phone net, the process of data communication in the sewage water system is analyzed. In addition, the general design thinking and software and hardware design method are given. The concrete scheme is given. In this project, I finished the software design of this system and debugging by myself. This system has been accepted by the company and runs well. At last, based on the debugging experience and references, some important suggestions of system security are given. The experience accumulated in the debugging process is listed for being referred.This system has reached the requirements of the company after design and debugging.1 , Substation can receive the data from flow integrating instrument continuously and the data can be stored in EEPROM. The newly address can be memorized in EEPROM for using when another group of data will be stored. The memory can be used circularly. When master computer needs data, the button for sending can be hit. The user can set the number of data group.2, The master computer can enquire the data of substation atthe setting time. The data will be appended in the data file. Besides, the master computer can enquire the data by hand. This time, the number of data groups can be set.3, All kinds of reports and curve graph are offered.4, In our project the interrupt problems of communication have been removed. Once the condition of missing data is occurred, user can use handing dial to compensate it.更多还原