利用单片机及RS-485半双工通信网构成现代化住宅的自动抄表记费系统VIP免费

-摘要本系统是利用单片机及 RS-485 半双工通信网构成现代化住宅的自动抄表记费系统的前端数据采集模块和通信控制模块。能够实现对同一单元中一层楼的两家住户的水、电、气使用量的采集和集中存储及发送。本文首先介绍了自动抄表系统的发展情况，接着对本自动抄表系统进行了简要的描述。然后阐述了数据采集模块和通信控制模块的通信方式及使用的通信介质。最后重点介绍了数据采集模块和通信控制模块的硬件构成和软件设计。关键词：89c51 单片机，自动抄表系统，串行通信，RS-485 接口标准,数据采集ABSTRACTThis system is about the technology of using the 89c51 single chip computer and RS-485 half-duplex transportation network to compose the system of automatic recording and charging. This system is used for modern residence .They can pick , storage and transmit the amount of water、electricity and gas of the two users in the same storey. This thesis first introduce the current development status of automatic recording and charging system, then simply introduce this automatic recording and charging system. Then emphatically present the design and accomplish of the hardware and software of the data collect module, communication control module and electrify control module . Finally introduce the simulation and the fail test of the whole system. Key words: 89c51single chip computer, automatic recording system, Serial communication RS-485 standard interface and data collect module.目 录第 1 章 引言........................................................11.1 本课题的研究意义..............................................11.2 本课题的研究内容..............................................2第 2 章 系统概述...................................................32.1 前端数据采集处理装置..........................................32.2 传输线路......................................................52.2.1 上层传输线路..............................................52.2.2 底层传输线路...