基于单片机的光功率计的设计.doc

《光电转换电子电路》课程设计论文 论文题目：基于单片机的光功率计的设计 学院(系)： 信息工程 专 业： 物理电子学 班 级： 信研1108 学生姓名： 庞锦 学 号： 1049721103104 教 师： 张翠 2012年 6月 27 日 摘要 本文首先对光功率计的组成原理进行了详细的分析，查阅大量资料并比较国内外产品的性能和价格，然后根据生产的实际需要进行低成本研发工作。在能满足生产的的要求基础上进行总体的设计规划，并给出各个电路的设计和说明，包括光探测器的选择、放大滤波电路的设计、A／D转换、单片机控制、外围电路的设计、液晶显示电路、按键电路等设计。在选择芯片方面，我们尽量做到IC集成化，因为集成IC的整体功能更加稳定而且价格相对来说也比较便宜．最后是对系统的各个模块的软件进行编写，我们摒弃用汇编语言开发下位机程序，而改用C语言，这样使得开发效率更高和程序的可读性更强。其中有下位机MCU自身的初始化，下位机MCU与外围芯片的通信，下位机与上位机的通信，上位机程序的书写等。 关键词：单片机，智能仪表，光功率计 abstract This paper first light to the composition of the power meter principle of a detailed analysis, consulting a large number of material and the comparison of domestic and foreign products performance and price, and then based on the actual need of the production of the low cost research and development work. In satisfy the production based on the requirements of the overall design planning, and give each circuit design and shows, including the choice of light detectors, amplify filter circuit design, A/D conversion and single-chip microcomputer control, peripheral circuit design, liquid crystal display circuit, key circuit design. In the choice of chips, we try to do IC integration, because the integrated function of the integrated IC more stable and the price is relatively cheap. The last of the system is different models of the software to write, we abandoned in assembly language development a program under the machine, to C language, this makes the efficiency of development in higher and the program more readable. Among them are a machine itself under the initialization of MCU, a machine and peripheral communications chip MCU, superordination machine communication, PC program of writing, etc. Key words: a single-chip microcomputer, intelligent instrument, light power meter 1 绪论 近年来，光纤通信已成为通信领域发展中的最前沿，它不仅在军用，而且在民用通信中也得到广泛应用。光纤通信系统的主要组件有： (