【2017年整理】基于虚拟仪器技术的表面粗糙度测量仪.doc

基于虚拟仪器技术的表面粗糙度测量仪 院 系 专 业 技术班 级 学 号 姓 名 指导教师 负责教师 沈阳航空工业学院2009年6月摘 要 ：；；Abstract Surface roughness is a reflection of the extent of parts of the physical surface. It is in the process of cutting by the cutter in the workpiece surface, the marks left behind created. Currently widely used touch-stylus profilometer roughness of some parameters can be assessed, but there is less parameters, the lower the measurement accuracy, the measurement results are not intuitive, such as the shortcomings of the output can no longer meet the measurement requirements of modern work. In this paper, According to the definition of surface roughness, the roughness measuring instrument 2201, improved by hardware, a design based on Virtual Instrument Technology of surface roughness measuring instrument. In addition to the instruments of traditional instruments to solve the existing problems, but also with the measurement of speed and a high degree of automation and good man-machine interface and so on. This paper introduces some relevant knowledge of surface roughness and LabVIEW virtual instrument software function and application, the design for the software design, the design calculation software， the next-bit machine for measuring and gathering data through the serial port to transmit data to PC, PC machine for the next crew of the data collected to deal with, come to the surface roughness measurement of objects, for which the data display and storage. Keywords: single chip computer; fiber optic sensor; surface roughness;LabVIEW 目 录 1 1.1 立题意义 1 1.2 光纤传感技术的发展与现状 1 1.3 虚拟仪器测试技术发展 3 1.4 表面粗糙度测量技术的发展 4 1.5 本文研究内容 5 第2章 粗糙度的基本概念 6 2.1 表面粗糙度的概念 6 2.2 表面粗糙度的测量参数 6 2.3 反射式光纤位移传感器的结构 7 2.4 反射式光纤位移传感器输出特性 7 2.5 粗糙度测量原理 8 第3章 粗糙度测量仪的总体方案设计 10 3.1 下位机硬件方案设计 10 3.1.1 传感器的选择 10 3.1.2 光纤传感器特性实验 11 3.1.3 单片机数据采集和传输电路的设计 11 3.2 下位机软件系统设计 11 3.3 上位机总体设计 12 第4章 粗糙度测试仪的下位机设计 14 4.1 信号调理电路 14 4.2 单片机及其外围扩展电路的设计 14 4.2.1 单片机介绍 14 4.2.2 时钟电路设计 16 4.2.3 复位电路的设计 17 4.2.4 A/D转换电路的设计 17 4