全自动节水灌溉系统--硬件部分

摘    要
自动控制节水灌溉技术的高低代表着农业现代化的发展状况，灌溉系统自动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滴灌节水灌溉系统，该系统可对不同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，其核心是单片机构成的控制部分，主要对土壤湿度与灌水量之间的关系、灌溉控制技术及设备系统的硬件、软件编程各个部分进行了深入的研究。单片机控制部分硬件部分选用单片机STC12C2052AD为核心，主要由土壤湿度传感器，显示电路，输出控制电路等组成，软件选用C语言编程。系统主要具有以下功能可在单片机提供的控制按钮上设置作物要求的土壤湿度相关参数；单片机可将土壤湿度传感器检测到的土壤湿度模拟量转换成数字量，显示于数码管上，同时单片机将此湿度值与片内的设定的湿度值进行比较，当采集到的湿度值低于设定的湿度值时，执行控制电路部分进行灌溉；当采集到的湿度值高于设定的湿度值时，停止执行控制电路部分进行灌溉。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。 [来源：http://www.think58.com]

关键词：节水灌溉；单片机；湿度传感器 [版权所有：http://think58.com]

Abstract
Automatic water-saving irrigation techniques represent the level of development of the modernization of agriculture, irrigation systems, low level of automation is constraining the development of China's main reason for high-efficiency agriculture. This article studied this issue MCU drip of water-saving irrigation system, which can be of different soil moisture monitoring, and in accordance with the crops on soil moisture requirements of timely and adequate irrigation, constitute the core of which is single-chip control some, mainly on soil moisture and the relationship between irrigation, irrigation control technology and equipment, system hardware, software, programming the various parts of an in-depth research.
SCM Singlechip optional part of the hardware part of STC12C2052AD as the core, mainly by soil moisture sensors, display circuit, the output control circuit, such as composition, choice of C language programming software. System has the following functions can be provided in single-chip control buttons to set the requirements of soil moisture, crop-related parameters; Singlechip soil moisture sensor can be detected in the soil moisture analog to digital volume, shown in the digital tube, the At the same time, this humidity value of single-chip chip set humidity values, when collected humidity Humidity is lower than the set value, the part of the implementation of control circuit for irrigation; when collected humidity humidity values higher than the set value, the control circuit to stop the implementation of parts of irrigation. [来源：http://www.think58.com]
The system is flexible, easy-to-use, high reliability, there will be a broader development prospects.

Key Words：Water-saving irrigation; Singlechip; Humidity sensor
目    录

摘    要 I
Abstract II
引    言 1
1 微灌节水系统的总体设计  4
1.1微灌技术简介  4
1.2滴灌灌溉制度的拟定 4
1.3滴灌系统简介  5
1.4 单片机系统控制简图  5
2 主要器件选取 6
2.1 单片机的选取 6
2.2 土壤湿度传感器的选取 7
3 系统主要硬件电路设计 7
3.1 单片机系统电路 7
3.2 LED显示系统电路 9
3.3 系统驱动电路  12
4 系统软件设计   13
4.1主程序 13
4.2采样且数据处理程序 13
4.3 LED显示子程序  14
4.4 按键子程序  16
4.5 定时/计数器子程序  18
5 抗干扰技术  19
5.1硬件抗干扰措施  19
5.2 软件抗干扰措施  20
结    论 21
参 考 文 献 22
致    谢 23 [资料来源：http://THINK58.com]