电涡流式金属板材测厚仪的设计毕业论文.doc

电涡流式金属板材测厚仪的设计 院 系 专 业 班 级 学 号 姓 名 指导教师 负责教师 沈阳航空工业学院2008年6月摘 要 LED显示，给出合格检验时超标与否的指示灯提示及蜂鸣超标报警提示。本系统由两部分组成：硬件系统和软件系统。硬件系统利用电涡流传感器及其测量电路测量不同材质和厚度的金属板，得到不同电压，经放大后进行模数转换输入单片机。单片机通过软件编程对被测数据进行相关处理，结果送往LED显示器进行显示，并外接蜂鸣器和指示灯实现超标报警。软件系统用汇编语言进行编程，采用模块化设计思想。该系统通过联调后，实现了预期各种功能，符合设计要求。 关键词：电涡流传感器；金属板材测厚仪；合格检验；单片机；LED显示 Abstract This paper introduces the design of metallic material thickness based on eddy current sensor. The task uses eddy current sensor, Single Chip Micyoco system to design metallic material thickness meter. The system can realize the functions of thickness measurement, pass examination and its overrun alarm. The input of the quality of metallic planking to be measured the preseting of object thickness and error grade when pass examinating all can be done through key board. The relative information is displayed on LED readtine. When pass examinating,buzzer and light prompting of overrun or not are given. The system design contains two parts: hardware design and software design. The hardware system uses eddy current sensor and its measuring circuit to measure different kind of metallic plankings to get different voltage value.After amplified, the voltage is tramcformed to digital signal and then is sent to SCM. Through softwere programming, the measured data is processed and the result is displayed on LED in SCM system. The overrun alarm is realized by buzzer and light in dicator. Assemble language is used in the software system and modularization design idea is adopted. This system realizes all desired functions and coincides with demand after system debugging. Keywords: eddy current sensor; planking thickness meter; pass examination; Single Chip Micyoco; LED display 目 录 第1章 绪论 1 1.1 课题产生的背景 1 1.2 本课题的主要任务及内容 2 1.3 本课题的任务分析与实现 3 1.4 本论文的主要内容安排 3 第2章 电涡流式金属板材测厚仪的基本原理 5 2.1概述 5 2.2电涡流传感器测厚原理 5 2.2.1 电涡流传感器测量原理 5 2.2.2 电涡流传感器测厚原理 10 第3章 金属板材测厚仪的硬件系统设计 12 3.1 金属板材测厚仪的硬件设计方案 12 3.2 传感器及其测量电路的设计 13 3.3 放大电路的设计 13 3.4 单片机系统电路的设计 1