水质远程智能化监控系统设计及其在农业领域中的应用

发布时间：2018-01-05 18:03

本文关键词：水质远程智能化监控系统设计及其在农业领域中的应用　出处：《西安邮电大学》2017年硕士论文　论文类型：学位论文

【摘要】：本文所研制的系统来源于陕西省教育厅产业化培育项目,项目名称为:水质远程分析科学决策智能化环保系统的研制(项目编号:14JF022)。为满足农业灌溉水质监测的需求,该项目所研制的系统需要采用太阳能供电并可以完全工作在野外,数据分析速度在1分钟之内,系统所监测的水质pH、氨氮含量、溶氧量、盐度、浊度、温度、电导率数据精度优于4%,系统无线传输距离大于10000公里,控制延时小于1.5秒,监控中心可存储2年的水文信息,数据库可以存储16G的测量数据。为完成陕西省教育厅产业化培育项目的具体技术指标,保障农业灌溉用水的安全性。本文从农业水质远程智能化监控系统结构设计入手,结合物联网技术、PLC技术、传感器融合技术,设计了一套农业水质远程智能化监控系统。本文所做主要工作如下:1.首先分析了国内外水质监测仪的发展与现状,并结合陕西省教育厅产业化培育项目的实际技术指标和要求对水质远程监控系统的整体结构进行了研究,研发了一套农业水质远程智能化监控系统。2.完成了农业水质远程智能化监控系统的硬件设计与制作,在对PLC的I/O 口资源分配后给出了农业水质远程智能化监控系统的具体接线方案,并针对水质传感器的原理及输出特性绘制了水质传感器调理电路PCB、制作了单独的模块。3.完成了农业水质远程智能化监控系统PLC梯形图以及嵌入式触摸屏组态软件的设计与编写,根据农业水质监测的实际需求完成了水质监控系统的智能模式功能,完成了农业水质远程智能化监控系统的Modbus协议确定,协助团队另外一名同学完成手机端的软件开发。系统能够通过DTU向COMWAY物联网云服务平台发送数据,在电脑端完成了监控系统的组态设计,实现了数据实时获取、历史数据查询、超标报警、农业用水控制功能。4.针对水质传感器的特点,研究了传感器信号修正补偿方法,并根据具体的水质数据给出了一种曲面拟合的温度补偿方法,减小了温度对盐度、浊度、pH、电导率、氨氮含量、溶解氧值测量精度的影响。上述工作完成了陕西省教育厅产业化培育项目的研发内容,达到了项目所要研发系统的技术指标。为保障陕西省咸阳市乾县阳峪镇1100亩果园灌溉用水的安全性,将该系统应用在该园区,保障了该园区灌溉用水的安全性,达到了本系统的设计目的。
[Abstract]:The system developed in this paper comes from the industrialization cultivation project of Shaanxi Provincial Education Department. The name of the project is: the development of intelligent environmental protection system for scientific decision of water quality remote analysis (item No.: 14JF022) to meet the needs of agricultural irrigation water quality monitoring. The system developed by this project needs to be powered by solar energy and can work completely in the field. The analysis speed of the data is within 1 minute. The pH, ammonia nitrogen, dissolved oxygen, salinity and turbidity are monitored by the system. The accuracy of temperature and conductivity data is better than 4, the wireless transmission distance of the system is more than 10000 kilometers, the control delay is less than 1.5 seconds, and the monitoring center can store hydrological information for 2 years. The database can store 16G measurement data. It is the specific technical index to complete the industrialization cultivation project of Shaanxi Education Department. This paper starts with the structure design of agricultural water quality remote intelligent monitoring system, combining with the technology of Internet of things (IOT) and PLC technology, sensor fusion technology. A set of remote intelligent monitoring system for agricultural water quality is designed. The main work of this paper is as follows: 1. Firstly, the development and present situation of water quality monitor at home and abroad are analyzed. The overall structure of the water quality remote monitoring system is studied in combination with the actual technical indexes and requirements of the industrialization cultivation project of Shaanxi Provincial Education Department. Developed a set of agricultural water quality remote intelligent monitoring system. 2. Completed the hardware design and manufacture of agricultural water quality remote intelligent monitoring system. After allocating the resource of I / O port of PLC, the concrete connection scheme of the remote intelligent monitoring system of agricultural water quality is given. According to the principle and output characteristics of the water quality sensor, the conditioning circuit PCB of the water quality sensor is drawn. Make a separate module. 3. Completed the agricultural water quality remote intelligent monitoring system PLC ladder diagram and embedded touch screen configuration software design and programming. According to the actual demand of agricultural water quality monitoring, the intelligent mode function of the water quality monitoring system is completed, and the Modbus protocol of the remote intelligent monitoring system of agricultural water quality is completed. The system can send data to the COMWAY Internet of things cloud service platform through DTU, and complete the configuration design of the monitoring system on the computer side. Achieve real-time data acquisition, historical data query, alarm, agricultural water use control function. 4. According to the characteristics of water quality sensor, the sensor signal correction and compensation method is studied. According to the specific water quality data, a curved surface fitting temperature compensation method is given to reduce the temperature to salinity, turbidity, pH, conductivity, ammonia nitrogen content. The above work has completed the research and development of the industrialization cultivation project of Shaanxi Education Department. In order to ensure the safety of 1100 mu orchard irrigation water in Yangyuzhen, Xianyang City, Shaanxi Province, the system is applied in the park. The safety of irrigation water in the park is guaranteed, and the design purpose of the system is achieved.
【学位授予单位】：西安邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP277

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