1、 xx大学学士学位论文 - I - 基于基于 AVR 单片机的数据采集系统设计单片机的数据采集系统设计 摘要摘要 近年来，随着嵌入式微处理器的快速发展，单片机系统得到了广泛的应 用。在医疗、航空、交通、军事技术、工业控制、科学研究等领域，单片机往 往是作为一个核心部件来使用，但仅仅具备单片机方面的知识是不够的，还应 结合具体的硬件结构以及应用对象的软件特点来设计系统。本论文的目的就是 设计实现一个具有一定实用性的实时数据采集系统。 论文主要论述对土壤内部温度、湿度、压力等数据采集系统的设计与实 现。它的主要功能是完成数据采集、处理、显示、控制以及与 PC 机之间的通信 等。基于对数据采集系统体
2、系结构及功能要求的分析，本文设计并实现的采集 系统采用 Atmega64 单片机为核心，扩展了电源电路、复位电路、LCD 接口电 路以及监控电路等，并配有标准 RS-232 及 RS-422 串行通信接口。系统软件采 用汇编语言编写，为了便于扩展和更改，软件的设计采用模块化结构。由于使 用该仪器的野外环境多样，干扰严重，在系统的开发实现中，不仅要实现数据 采集仪的一般功能，也要保证它的可靠性和安全性。本文论述了数据采集系统 所采取的硬件和软件方面的抗干扰措施，并对与 PC 机之间的通信实现进行了相 应的论述。 关键词 嵌入式；数据采集；Atmega64；传感器 xx大学学士学位论文 - II
3、- Design of Data Acquisition System Based on AVR SCM Abstract In recent years, with the rapid development in embedded microprocessor,the SCM(Single Chip Micyoco)has been widely applied in many fields such as the medical treatment,the aviation,the transportation,the military technique,the industry,th
4、e science research,andso on.In this fields,SCM is usually to be used as a core parts,but the knowledge of SCM isntenough.We should combine with the structure of concrete hardware and characteristics ofrelevant software to design the system.The purpose of this thesis is to design a practicalreal-time
5、 data collection system. This thesis mainly discuss the design and realization of the data collection system whichrefers to the temperature、humidity、pressure inside the soil.The system is mainly used tofinish the data collection、processing、display and the correlative control and communicationwith th
6、e PC.On the analysis of the system structure and function requirement,the system inthis thesis adopts the Atmega64 core,expands the power、reset、LCD interface circuit withstandard RS-232 series communicate interface.For the entironment the system in use iscomplex with serious disturb.We should ensure the reliability and security besides the basicfunction in the design of the system.In this thesis we discuss the anti-jamming measuresthrough hardware and software.We talk about the realization of c
