基于GPRS的农情监测系统的研究与设计

文档编号:DQ266   文档字数:23950,页数:66 

摘　　要
 随着通信技术的不断发展，利用GPRS（通用分组无线业务）网络所提供的公用平台来实现数据的远程传输越来越成为一种非常便捷的信息传递手段，本设计是采用GPRS网络来实现土壤状态的远程监测。完整的监测系统由数据采集、数据传输和上位机三部分组成。数据采集部分负责收集传感器上的状态信息并将这些信息按照一定的格式传送给上位机；数据传输部分将采集终端送上来的状态信息按照网络协议通过Internet网络传送给远端控制中心的客户机；上位机部分采用组态软件开发，实现了现场数据实时上网，监测人员在任何时间、任何能接入Internet的地点都可以通过上位机浏览到现场数据。
 系统综合计算机、无线数据通讯、自动化控制等技术，系统成功实现了以GPRS平台作为一种数据传输通道，可不定时动态监控特点与数据采集，该系统具有用户投资小、运营费用少的优点。对于解决监控采集点、实时性要求较低的监控与数据采集任务，本系统具有无可比拟的优势。
 文档主要论述了基于GPRS的农情监测系统的研究与设计，按照构成整个系统的四个功能模块依次进行介绍。首先介绍了课题的背景，对传感器作了简单介绍。接下来对温度数据采集模块和无线传输系统进行了综合详细的阐述。最后介绍了上位机组态软件的实现，在结构和性能上对整个系统作了总结，提出了系统的特点和不足并对未来的技术发展进行了展望。
 
  
关键词：GPRS  组态  数据采集  传感器
Abstract
 As the fast development of communication technology, it turns into a convenience way to transmit data through GPRS (General Packet Radio Service) between long distance. This soil condition remote monitoring system consists of three parts: data acquisition, data transmission and data processing. This part is designed to gather the state information of the soil and send the data to computer as certain mode. The second part is designed to transfer the data to the clients in remote control center through Internet. With the implementation of real-time online monitoring network, users can browse the on-the-spot data in any place.
 The system synthesizes the technology of computer, wireless data communication, automatic control, etc, based in the traditional industry, and implements a data transmission channel using GPRS platform, which can meet the requirement of monitoring and data collection. This system has advantages compared with other systems that should meet the requirements as monitoring collection point, and non-strict demand for real-time.
 This paper mainly discusses Research and Design of Agriculture Content Monitoring System Based on GPRS, which is introduced according to four functions modules one by one in order. First, it introduces the background of the topic, and also made the simple introduction to the sensors. Then it introduces the total function and the design frames of data collection module and wireless transmission system. Last, the paper especially elaborates the realization of the configuration software and summarizes the whole system on the structure and functions, generalizes characteristics and existent problems of the whole system design, and carries on the outlook to the future technique development.
  
 
Key Words: GPRS  Configuration  Data Collection  Sensor
 
目　　录

摘　　要 1
Abstract 1
目　　录 1
1 绪论 1
1.1 研究背景及综述 1
1.2 系统应用可行性分析 2
1.3 整体功能及运行原理 2
2 传感器原理与设计 3
2.1 PT100温度传感器 3
2.2 FDS100土壤水分传感器 5
2.3 AH11湿敏电容型大气湿度传感器 7
3 分布式采集模块的原理与设计 11
3.1 模拟量输入模块 11
3.1.1 模块原理 11
3.1.2 设备测试与配置 12
3.2 ModBus协议 13
4 传输系统的设计 21
4.1 RS485/232通讯协议转换模块 21
4.2 GPRS模块 22
4.3 Internet传输 30
5 电源模块的设计 33
5.1 系统功耗分析 33
5.2 三路供电系统的设计 33
5.3 电源管理 34
6 上位机软件设计 36
6.1 GPRS服务器 36
6.2 虚拟服务器 39
6.3 动态域名解析软件 40
6.4 组态软件 43
7 系统的总结与展望 50
7.1 系统的特点与不足 50
7.2 系统的改进和展望 50
参考文献 51
致　　谢 53
附录1 PT100分度表 54
附录2 饱和盐溶液的平衡相对湿度表 55
附录3 DAM3058F支持的功能码 57

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