基于GPRS的流量计数据采集系统

介绍了GPRS通信技术在流量计数据采集系统应用中的硬件和软件实现,讨论了系统的结构组成及动态域名和端口映射等技术的应用.针对流量计数据通信接口和GPRS通信技术的特点,采集同一GPRS终端下的仪表数据.与一般每次一台的设计方法不同,提出了数据中心采用打包发送指令及GPRS终端打包返回仪表数据的新思路,并在已有通信协议的基础上专门设计了自己的协议,增加了通信系统的效率和稳健性.提出了支持各种不同通信指令系统的流量计或其他仪表可方便加入一个数据采集系统的方法,使系统具有很强的通用性.

The Design of Flowmeters Data Acquisition System Based on GPRS

The hardware and software design of GPRS communication technology applied to flowmeters data acquisition is introduced in this paper.The entire system structure and the application of dynamic domain name and port mapping are discussed.According to the features of flowmeter communication interface and GPRS communication technology,a new idea is put forward which differs from general data acquisition way by collecting data once a meter and takes the strategy for data acquisition from the same GPRS terminal equipment that Data Center Server sends instruction or GPRS terminal equipment returns the meters data by making up many frames as one big packet.A self defining special protocol system based on existing ones is developed,which greatly increases the communication efficiency and robust in practice.A good means can be found to allow various flowmeters or other meters with different communication instruction systems to access one data acquisition system;Therefore,the communication system has good versatility.