自动量程转换频率计的设计 毕业设计 毕业论文及文献综述.doc

 东华理工大学长江学院 毕业设计（论文） 题 目 ： 自动量程转换频率计的设计 EAST CHINA COLLEGE OF TECHNOLOGY CHANGJIANG INSTITUE GRADUTION PROJECT(PAPER) TITLE:Automatic range switching frequency meter design STUDENT NAME:Ke Jian STUDENT NUMBER SPECIALIZED:Electronic information project INSTRUCTS TEACHER:Xu Jian 摘 要 这些年来，51系 单片机一直作为单片机系列的主流产品，在其基础上形成8位，16位，32位等51单片机系列。随着时代的发展，新的技术逐步引入，包括羚羊单片机系列，ARM单片机系列，PIC单片机系列，DSP单片机系列，CPLD可编程逻辑控制器件等等，然而51系列作为上一代的主流产品，已经推广和运用了十几年了，无论从基础学科学习上还是实际工业生产中，51系列单片机仍然保有其一席之地。 本设计以AT89C51单片机小系统作为核心器件，采用了等精度的测量方法，使用INA128和斯密特触发器对输入信号进行放大、整形，利用Keil C?编译环境对AT89C51进行编程，最终在数码管上显示出频率值。 关键词：AT89C51; 等精度; 频率 Abstract These years,51 series monolithic integrated circuits tookcontinuosly the monolithic integrated circuit control section the mainsteam product,forms 8 in its foundation,16,32 and so on 51 monolithic integrated circuits series. Along with the time development,the new technology introduces gradually,including antelope monolithic integrated circuit series,ARM monolithic integrated circuit series, DSP monolithic integrated circuit series, CPLD programmable logic control component and so on, however 51 series achievement previous generations mainstream product, already promoted and has utilized for several years, regardless of from the foundation discipline study in the actual industrial production, 51 series monolithic integrated circuits still held its small space. This design by the AT89C51 monolithic integrated circuit small system took the core component, has used the precision measuring technique, uses INA128 and the Smith special trigger carries on the enlargement, the reshaping for the input signal, translation environment carries on the programming using Keil the C to AT89C51, finally demonstrates the frequency value on the digital tube. Key word: AT89C51; precision; frequency 目 录 摘要................................................................. Abstract............................................................. 0绪论..............