基于单片机的码盘转速测量系统的优秀毕业设计.doc

摘 要 在控制领域中,经常需要进行各种角度、位移量的测量。当前，世界上正面临着一场新的技术革命，这场革命的基础就是技术。技术的发展给人类社会和国民经济的各个部门及各个领域带来了巨大的、广泛的、深刻的变化，带动着传统工业和其他新兴产业的更新和变革，是当今人类社会发展的强大动力。Abstract In the control field, a variety of angles and displacement measurements often need to be carried out. At present, the world is facing a new technological revolution; one of the most important bases of the revolution is measurement. The development of measurement technology brings extensive，tremendous and profound changes to human society and all sectors of the national economy, changes the traditional industries and other emerging industries, becomes todays strongest driving force for development of human society . The encoder speed measurement system is designed to measure a different speed from the outside values，to achieve real-time speed measurement and display. Specific application use AT80C51 microcontroller as its core, rotary encoder measures real-time shaft speed, in both 8 serial Segment type LCD display module display. Rotary encoder output a 4.25V, 8-bit binary natural code into the MCU processed and computed, and then look-up table converts to 10 decimal number, sent to LCD display module. In this paper, detailed working process of speed measurement system is started with principle of speed measurement, and hardware circuit design and display. This paper has absorbed the idea of hardware and software to achieve with the subject required functionality. Key words: rotational speed measurement, rotary encoder, microcontroller, LCD display module 目 录 第一章 绪论 1 1.1国内外转速测量技术简介 1 第二章 原理说明及方案选择 2 2.1 转速测量理论的简要介绍 2 2.2 方案选择 3 2.3 方案原理 3 2.4 转速测量参数及电路参数分析 4 2.4.1MCS-51的定时器/计数器简介 4 2.4.2定时器模式选择位 5 第三章 硬件电路的设计 7 3.1 单片机的选择 7 3.1.1 80C51的介绍 10 3.2 旋转编码器的选择 13 3.2.1 PALD6615-256-C05E简介 13 3.2.2 PALD6615-256-C05E编码器的应用 14 第四章 显示部分 15 4.1 LED显示器 15 4.2 LCD显示器 15 4.2.1 LCD的分类及特点 15 4.2.1笔段式LCD液晶显示器的驱动 15 4.2.2 LCD显示模块LCDM（Liquid Crystal Display Module） 15 4.3 LCD显示器的驱动接口 17 结论 19 谢辞 20 参考文献 21 附录一 系统电路图 22 附