摘 要:要求对电度表进行准确、及时读表既是用电户的切身利益，又是电力企业管理的重要环节， 因此得到电力企业和社区管理的高度重视。但是电度表种类繁多、分布广泛、工作环境条件各异、管理水平参差不齐，给准确、及时读表带来严峻的挑战。目前,国家正在推广智能电表技术,以不进入用户室内的方式实现方便查表,使大量数字化查表工作逐步代替人工查表传送。现有的自动抄收系统存在许多弊端,因此,开发一套兼具经济、高效、稳定、可靠、适用面宽的电表自动抄收系统已经呼之欲出。
本课题研究的是基于VB平台的读表系统。首先建立PC机和多功能电表之间的硬件通讯，利用USB转485进行连接，RS485与电表通过双绞线（网线）连接，采用RS485异步串行通讯方式通信；软件方面运用VB语言编写读表软件模块，通过对模块建立MSComm 控件和Access数据库链接实现对电表各个参数的读数和存储。系统的实际运行和测试表明:该系统满足DL/T614-1997多功能电能表通信协议方式，运行可靠稳定,操作简单,抄得的数据准确,达到了预定的目标,满足了实际的需求,具有工程应用价值。
关键词:自动抄表系统 通讯协议 VB RS485
ABSTRACT:Require meter for accurate and timely meter reading is both vital interests of electricity customers, but also an important part of enterprise management power, so get power enterprises and community management's attention. But meter variety, widely distributed, working conditions vary, the management level uneven, giving accurate, timely meter reading pose serious challenges. Currently, the state is promoting smart metering technology, the user does not enter the room to be achieved easily look-up table to make a lot of digital work gradually instead of doing lookup transmission. Collecting existing automated systems has many drawbacks, therefore, develop a set of both economic and efficient, stable, reliable and suitable meter wide has been pretty automatic meter reading system.
The research is based on the VB platform meter reading system. First established between the PC and the multifunction meter hardware communication, connect via USB to 485, RS485 with the meter via UTP (network cable) connection, asynchronous serial communication using RS485 communication; software using VB language Meter Reading software module, through the establishment of the MSComm control module and Access database links the various parameters to achieve the meter readings and storage. The actual operation of the system and test showed that: the system meets DL/T614-1997 multifunction energy meter communication protocol, running stable and reliable, simple operation, ransacked the data is accurate, reaching the intended target, to meet the actual needs, with engineering application value.
Keywords：Auto Meter Reading System；Communication Protocol；RS485；vb
