位移测量系统的设计

摘要

在现代工业生产过程中，常常需要测量很多不同的位移量。与此同时对位移量进行较为精确地检测，是提高控制精度的基础。因此之前所普遍采用的传统位移测量装置已经不能适应时代发展的潮流。在此情况下通过科研人员的不断努力终于研制出了数字式光电编码器,它的输入量是角位移量其输出量是相应的电脉冲,并且它有体积小，精度高的优点。故而，这次毕业设计选用的是光电编码器。

本次毕业设计是以AT89C51单片机为核心，用光电编码器来实现对位移量的精确测量，再将测量结果显示在LCD液晶显示器上。其中本次设计中所选用的是输出电压为5V的光电编码器。

本文由浅入深先介绍了一些关于位移测量的基本原理，进而阐述了各个模块的设计思路，工作过程以及显示效果。本文借鉴了一些当前较为流行的设计思想，例如硬件软件化，很好的满足了设计要求。

关键词：位移，测量，光电编码器，单片机，LCD显示器

Abstract

In the control field, a variety of displacement measurements often need to be carried out. In actual industry position control domain, to increase the control precision, carries on the examination to the controlled member is accurately very important.The traditional machinery survey displacement installs has not been able to satisfy the modern production by far the need, but the digital sensor electro-optic encoder, can transform the angular displacement into with it correspondence electricity pulse output, mainly uses in the mechanical position and the velocity of whirl examination, has the precision to be high, volume small and so on characteristics, therefore this design decided that uses the electro-optical encoder to carry on the displacement to examine.

This design to use the electro-optical encoder to realize the displacement survey and the simulation, realizes the survey from the exterior different displacement value and the demonstration. Makes concrete using at89C51 monolithic integrated circuit is the core, the electro-optical encoder carries on the displacement to survey, simultaneously by LCD liquid crystal display module demonstration. This design uses the electro-optical encoder output voltage is 5V, the output signal after four doubling circuit processing sends in the monolithic integrated circuit to carry on counting processing, finally sends in the LCD module demonstration.

In this paper, detailed working process of displacement measurement system is started with principle of displacement 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:The displacement surveys, electro-optical encoder, microcontroller, LCD display module

目录

第一章绪论·················································

1.1位移测量及其传感器简介··································

1.2光栅位移测量技术简介··································

第二章原理及方案说明···································

2.1 方案选择及原理··········································

2.1.1鉴相原理·············································

2.1.2脉冲的鉴相和计数的软件实现方法···························

2.1.3脉冲的鉴相和计数的硬件实现方法···························

2.1.4用单片机内部计数器实现可逆计数·······················

2.2位移测量参数及电路参数分析······························

2.2.1MCS-51的定时器/计数器简介····························

2.2.2定时器模式选择位·····································

第三章系统电路的设计········································

3.1 硬件电路的设计···········································

3.1.1 单片机的选择·········································

3.1.2 AT89C51的介绍········································

3.1.3 1XP8001-1简介········································

3.2 软件的设计···············································

第四章显示部分···············································

4.1 LCD显示器················································

4.2 LCD分类及特点······································

4.3 LCD1602液晶显示器································

第五章仿真实现················································

5.1 PROTEUS仿真软件简介·······································

5.2 KEIL软件的简介··································

结论······························································

致谢······························································

参考文献··························································