仓库温湿度检测系统设计-计算机毕业设计.doc

仓库温湿度检测系统设计-计算机毕业设计 摘 要 本设计是基于AT89S52单片机的大棚温湿度自动控制系统，采用SHT10作为温湿度传感器，LCD1602液晶屏进行显示。SHT10使用类似于I2C总线的时序与单片机进行通信，由于它高度集成，已经包括A/D转换电路，所以使用方便，而且准确、耐用。LCD1602能够分两行显示数据，第一行显示温度，第二行显示湿度。这个控制系统能够测量温室大棚中的温度和湿度，将其显示在液晶屏LCD1602上，同时将其与设定值进行对比，如果超出上下限，将进行报警并启动温湿度调节设备。此外，还可以通过独立式键盘对设定的温湿度进行修改。通过设计系统原理图、用Proteus软件进行仿真，证明了该系统的可行性。 关键词：AT89S52，SHT10，I2C总线，独立式键盘，温湿度控制  A design of warehouse temperature and humidity detection system Abstract This design is an automatic temperature and humidity controller for greenhouses, with the AT89S52 MCU being its main controller. It uses the SHT10 as the temperature and humidity sensor, and the LCD1602 to display the messages. The SHT10 uses a timing sequence much like the I2C to communicate with the micro-controller. Because it’s a highly integrated chip, it already includes an analog to digital converter. Therefore, it’s quite convenient to use, and also accurate and durable. The LCD1602 can display two lines of messages, with the first line for temperature and the second line for humidity. The design can measure the temperature and humidity in a greenhouse, and then display it on a LCD1602. Meanwhile, it compares the data with the set limit. If the limit is exceeded, then the system will send out a warning using a buzzer and activate the temperature and humidity controlling equipment. Besides, the set limit can be modified with the independent keyboard. Through schematic design and Proteus simulation, the feasibility of this design has been proved. Keywords: AT89S52, SHT10, I2C bus, independent keyboard, temperature and humidity control  第 PAGE II 页 共 II 页 目 录 TOC \o 1-3 \h \z \u HYPERLINK 1 绪论 1 HYPERLINK 1．1 本课题研究的背景 1 HYPERLINK 1．2 国内外研究的历史与现状 1 HYPERLINK 1．3 本课题研究的目的和意义 2 HYPERLINK 2 系统总体设计 3 HYPERLINK 2．1 系统实现功能 3 HYPERLINK 2．2 系统总体结构框图 3 HYPERLINK 2．3 主要元器件介绍 3 HYPERLINK 2.3.1 单片机AT89S52 3 HYPERLINK 2.3.2 温湿度传感器SHT10 6 HYPERLINK 2.3.3 显示器LCD1602 8 HYPER