多功能温湿度计设计稿毕业专业论文5662009.doc

多功能数字温湿度计设计【摘要】温度和湿度是两个最基本的环境参数,人们生活与温湿度息息相关。在工农业生产、气象、环保、国防、科研等部门,经常需要对环境温度与湿度进行测量。准确测量温湿度在生物制药、食品加工、造纸等行业更是至关重要的。因此研究温湿度的测量方法具有重要的意义。本论文讲述了一种以单片机 AT89C52 为主要控制器件,以DHT22 为数字温湿度传感器的新型数字温湿度计,具有时间、温湿度显示,并且可以自行设置温度预警值,当温度超出预警值时报警,存储温湿度的功能。【关键词】温度;湿度; DHT 22;时间 Multifunction digital hygrometer design [Abstract] Temperature and humidity are the two most basic environmental parameters, people's life is closely related to temperature and humidity. In industrial and agricultural production, meteorology, environmental protection, national defense, scientific research departments, often need to measure temperature and humidity to the environment. Accurate measurement of temperature and humidity in biological pharmaceutical, food processing, paper making industries isof vital importance. So the temperature and humidity measurement method has the vital significance. This paper tells the story ofa single chip puter AT89C52 as the main control device, a new type of digital temperature and humidity for DHT22 digital temperature and humidity meter, time, temperature and humidity display, and was able to set temperature warning value, when temperature exceeds the warning alarm, the function of storage temperature and humidity. [ Keyword ] Temperature; humidity; DHT22; time 目录 1. 温湿度计发展史-------------------------------------------------------------- 1 温度计的发展史---------------------------------------------------------------------------- 1 湿度计的发展史---------------------------------------------------------------------------- 2 2. 设计任务分析及方案论证------------------------------------------------- 3 设计数字温湿度计的需求分析---------------------------------------------------------- 3 设计任务及要求---------------------------------------------------------------------------- 3 设计总体方案及方案论证--------------------------------------------------------------- 3 器件的选择---------------------------------------------------------------------------------- 4 主控制器芯片--------------------------------------------