文档介绍：A Dissertation Submitted to Shanghai Jiao Tong University for the Degree of master
Research on Variable-rate Spraying Control System of Multi-function Sprayer
Author: Yuan Weifeng Specialty: Mechatronic Engineering Advisor: . Miao Yubin
School of Mechanical Engineering Shanghai Jiao Tong University Shanghai,
Feb. 2010
多功能变量喷雾机喷雾控制系统研究
摘要
精准农业是被广泛承认的可持续发展农业,并在国外已获得了显著的经济和社会效益。在精确农业技术体系中,变量喷雾是一个重要的组成部分,是解决我国农药杀虫剂,水肥,除草剂等投入不合理、农药平均利用率低和农业生态环境污染等问题的有效途径。本文结合上海市农委重点科技攻关项目,围绕变量施药技术,对变量喷雾控制系统进行了深入细致的研究。
论文主要研究内容如下:(1)针对我国精准农业中变量喷雾施药技术发展需求现状,在分析变量喷雾机变量控制原理的基础上,结合项目设计要求,提出并开发了测速传感器、流量传感器、系统压力传感器、电动/电磁阀相结合的农药变量喷雾系统方案。试验表明该控制系统具有较高的可靠性,能够满足精准农业意义上的变量喷雾控制精度要求。(2) 对液压回路的构建进行了分析设计,开发了变量喷雾控制系统的硬件。
(3)设计开发了系统相关的上下位机软件,主要包括裁剪移植了 Windows XP Embedded 嵌入式系统,并基于此系统开发了变量喷雾上位机控制软件, 实现了对传感器信息的自动采集和对流量控制阀的 PID 控制。(4)搭建了试验台,进行了变量喷雾相关试验。
论文研究工作为研究开发适合我国国情、具有变量平衡施药功能的多功能、低成本变量喷雾机提供了基础,为推动精准变量喷雾提供了技术支持。
关键词:变量喷雾;控制系统;电动比例控制阀;PID 控制器
Research on Variable-rate Spraying Control System of Multi-function Sprayer
ABSTRACT
Precision agriculture is widely recognized as sustainable agriculture. In foreign countries, it has made remarkable economic and social benefits. Variable-rate spraying technology, as an important part of the precision agriculture technology system, is an effective way of solving many agricultural issues in China, such as the unreasonable input of pesticide, fertilizer, herbicides, etc., the low utilization of pesticide, and the environment pollution on agricultural ecosystem. This dissertation, which is based on the variable spraying technology from the key scientific and technological project of Shanghai Agriculture Science and mission, makes an intensive study of the variable-rate spraying control system.
This dissertation is mainly concentrated on the following aspects: (1) According to the technical development needs of variable-rate spraying in the precision agriculture of our country, after analyzing the variable control principle of variable