Remote Data Communication Based On Phone Net And Application In Sewage Water Management System

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.