节水灌溉智能控制系统设计方案.doc

PAGE 34 - LANZHOU 毕业设计 题 目 节水灌溉智能控制系统设计 学生姓名 赵 胜 学 号 专业班级 自动化（3）班 指导教师 成娟娟 学 院 电信工程学院 答辩日期 兰州理工大学毕业设计(论文) 摘 要 节水灌溉智能控制技术的高低代表着农业现代化的发展状况，灌溉系统智能化水平较低是制约我国高效农业发展的主要原因。本文就此问题研究了单片机控制的节水灌溉系统，该系统对土壤的湿度进行监控，并按照作物对土壤湿度的要求进行适时、适量灌水，其核心是单片机通过采用PID算法对土壤湿度的控制部分，主要对灌溉控制技术及系统的硬件、软件编程各个部分进行了深入的研究。 单片机控制部分采用AT89C51单片机为核心，主要由土壤湿度传感器，AD转换器，显示电路，输出控制电路，故障报警电路等组成；软件选用C语言编程。系统主要具有以下功能：单片机可根据土壤湿度传感器检测到的土壤湿度，自动控制灌溉系统，并且同时显示出当前土壤的湿度值。该系统灵活性强，易于操作，可靠性高，将会有更广阔的开发前景。 关键词：节水灌溉；湿度传感器；单片机 ；自动控制 Abstract The level of auto-control water-saving irrigation technology reflects the development condition of agriculture modernization．The low automatic level of irrigation system is the main reason that prevented our agriculture’s development．As to this condition，this paper mainly studies the drip water-saving irrigation system that controlled by MCU(Micro—controller Unit)．This system call supervise and control moisture of different soil．It can irrigate to different farm corps with the right amount of water at the well time．The control part that consists of MCU and PC (personal computer) is its core． Research work hand been carried Oil to the relationship between soil moisture and water, irrigate control technology, hardware and software program and so on.It adopts the top and bottom form to realize the control function of drip irrigation system．Based onAT89C5lMCU,the bottom hardware system mainly consists of soil moisture sensor, Signal transfer circuit，monitor display circuit，out port control circuit，malfunction display circuit and the procedure programmed with C language Part of SCM AT89C51 miscrocontroller as the core, mainly by the soil moisture sensors,AD converter, display circuit,the output confrol circuit,the fault alam circuit and other components;software selection of the C programming language.The system has the following functions:MCU can be detected in soil moisture soil moisture