【作者】 李晓伟；

【导师】 邹久朋；

【作者基本信息】 大连理工大学 ， 安全工程， 2012， 硕士

【摘要】 现代科学技术的飞速发展,给温湿度监测技术提供了一个新的发展机遇。于此同时,人们在生产生活中又对温度湿度的测量系统提出了新的要求,如较快的响应速度、高精度、低功耗、高集成度、具有友好的人机交互功能等。为满足现代用户对温湿度监测的功能和性能需求,宜采用嵌入式系统技术进行温湿度监测。本文通过分析工业现场温湿度监测技术的现状及需求状况,并结合嵌入式系统技术的发展现状,提出来一种基于嵌入式系统技术的温湿度监测方案。在分析了该温湿度监测系统的功能需要的基础上,做出了系统的总体设计。硬件部分,采用Sensirion公司生产的SHT11集成数字温湿度传感器为温湿度数据采集模块,以艾特梅尔(Atmel)公司生产的Atmega8单片机为核心控制模块,应用RS485总线接口与上级监控网络进行通信,使用模块化思想把硬件电路划分为几个较小的模块,具体设计每个模块的硬件电路；软件部分,同样应用模块化思想把软件部分分成几个较小的软件模块,采用AVR Studio对每个模块进行具体编程。继而使用Labcenter electronies公司推出的免费仿真软件Proteus对软硬件进行仿真测试。最后结合软硬件对系统做功能测试。对于温湿度数据的转换公式,在盛世瑞恩公司给出的Datasheet里转换公式的基础上,独创了一种简化的转换公式,在几乎不损失数据转换精度的情况下,减小了程序代码量,减少了程序运行时间。经过对系统软硬件的仿真测试及功能测试,结果表明,本课题研制的温湿度监测系统能长时间稳定的运行,满足当前大部分用户的功能需求,能够快速精确地测量温湿度,并及时的把结果通过人机交互反映给用户或通过通讯模块上传给上级监控网络。更多还原

【Abstract】 The development of modern science and technology, give the temperature and humidity monitoring system a new development opportunity. At the same time, there are new requirements in the production and life for temperature and humidity monitoring system, such as quicker response speed, high precision, low power consumption, high level of integration, friendly human-machine interaction, etc. In order to meet the user’s requirements of the temperature and humidity monitoring system, we use embedded system technology in the temperature and humidity monitoring system.Through analysis of the present situation of modern temperature and humidity monitoring technology and demand conditions, and combining the current situation of the development of the embedded system technology, we present a temperature and humidity monitoring project based on embedded system. On the analysis of functional requirements of the of the temperature and humidity monitoring system, this paper design the whole system solutions. Using Senserion’s integrated digital temperature and humidity sensor SHT11for data acquisition module, with Atmel produced Atmega8single-chip microcomputer as control module, applying the RS485BUS Interface for communicating with higher level network, then building the hardware platform, using modular design concepts we divided the hardware circuit into several smaller modules, specific design each module of the hardware circuit; we also using the modular programming thought in software designing, divided the program into several smaller software module, using AVR Studio specific programming for each module, then using Labcenter electronies company’s free simulation software Proteus simulate and test the hardware and software of the. Lastly we carry on function testing based on the hardware and software.Based on the temperature and humidity data conversion formula, which given in the data sheet of Sensirion, we design a kind of simplified transformation formula, at the cost of no loss of data conversion accuracy, reducing the program code and decreasing the program running time."After test the system hardware and software, the results show that the subject of the temperature and humidity monitoring system can be long time stable operating, meet the most user’s function demand and performance requirements, it can quickly and high precision measure the temperature and humidity, and transmit the results through the human-computer interaction reflects to users or through the communication module to the monitoring network.更多还原