基于51单片机的温室大棚温湿度检测报警系统设计.

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湖南科技大学

课程设计

课程设计名称：多路温湿度测试报警系统

学生姓名：学院：机电工程学院专业及班级： 09学号：指导教师：

2013年 01 月 18 日

级测控一班

0903030110

湖南科技大学机电工程学院

课程设计任务书

课程设计名称专业综合课程设计课程设计题目学生姓名指导教师年级 09级专业温室大棚温湿度检测系统设计测控技术与学号 0903030110 仪器单位湖南科技大学重点实验室 2012-12-30~2013-1-18 课程设计起止日期设计内容：通过多个DHT11温湿度传本设计是基于AT89c51单片机的大棚温湿度控制系统，感器采集不同地点的坏境数据，并用LCD12864实时显示；程序中设置所需的温湿度，若显示的坏境数据超过设置值，则通过蜂鸣器报警。任务与要求：湿度 ±5% 0～100% 温度 ±1% 0～100℃ 限定（20～100）限定（1～20%） LCD实时显示电源DC 5V 工作环境温度小于90℃ 湿度小于90% 可设置报警温湿度主要参考资料：单片机编程实用技巧丛书传感器原理与应用 LCD1602系列液晶显示与模块设计

摘要

随着现代技术的不断发展，生产生活现代化的不断提高，用温室大棚技术来培养农作物可以显著的提高农作物产量，降低农业生产对自然环境和气候变化的要求。然而温室大棚对于温度湿度等一系列空气成分指标要求非常严格，而现代化的温室大棚则必须有一整套温度湿度的检测和控制系统，本设计就是为了适应现代温室大棚的需求，更加方便有效地观测环境温湿度，以便于更为科学合理地对温室大棚进行管理。本设计是以单片机为核心，配合温湿度传感器，以及相关的外围电路组成的检测系统，可以接收所测环境的温度和湿度信号，检测人员可以通过LCD显示的数据，实时监控环境的温度和湿度情况，如果检测到的数据超过所设定的温湿度上下限，则系统会自动产生相应的声光报警。所有的测量操作都可以通过主机控制软件来实现，温度和湿度传感器得到的测量信号，经电路转换为电信号，然后通过转换送到单片机进行数据处理，经软件分析处理后送显示装置。

本系统包括系统硬件和软件设计,可靠性高，结构简单，系统还应用RS232与上位机相连接，可以设置自动记录温度、湿度的相关的参数，也可以设置每隔一定的时间自动记录，操作简便，应用广泛。

关键词：STC89C52单片机，温湿度传感器， LCD显示

Abstract

With the development of modern technology, the production of modern life continues to improve, for greenhouse technology to cultivate crops can significantly increase the yield of crops, reducing the agricultural production of the natural environment and climate change request. However, the greenhouse temperature and humidity requirements for a series of air composition indicators are very strict, and greenhouse modernization must have a set of temperature and humidity measurement and control system, the design is for people living with and the continuous improvement of production level, to the living environment and the requirements of the production environment is particularly important, control temperature and humidity is a typical example, therefore, emerge as the times require an intelligent temperature and humidity detection system in modern life and fast, convenient and reliable detection system, especially in the industrial production if the detection of inaccurate will occur in many production accidents. To provide a better life for modern people to work, scientific research, and more convenient facilities, we must start from the SCM technology, all toward digital control system, intelligent control direction. The design is based on single-chip microcomputer as the core, with the temperature and humidity sensor, detecting system and related peripheral circuit, can receive the measurement of environmental temperature and humidity signal, detecting personnel can be displayed by the LCD data, the temperature and humidity of real-time monitoring of the environment. The measurement operation all can be realized through the host computer control software, the measurement signals are temperature and humidity sensor, the circuit is converted to electrical signals, and then the data were processed by conversion to SCM, through the software analysis processing evacuation display device.

The system hardware and software design, including the system of high reliability, simple structure, realizes the automatic control of temperature and humidity. The system also applies RS232 and host machine is connected, can parameters related to the automatic recording of temperature, humidity settings, can also be set at a certain time automatic recording, available in the meteorological observation.

Keywords ：STC89C52 microcontroller, temperature and humidity sensor, LCD display

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