凸轮综合检测仪的研制 机电一体化毕业设计论文.doc

目 录 中文摘要……………………………………………………………………………Ⅲ 英文摘要……………………………………………………………………………Ⅳ 引言…………………………………………………………………………………Ⅴ 凸轮综合检测仪系统总体方案设计 …………………………………1 1 系统功能分析 …………………………………………………………1 系统硬件总体设计 ……………………………………………………2 1．2．1 角位移传感器的选用……………………………………………2 1．2．2 线位移传感器的选用……………………………………………3 1．2．3 B向旋转步进电机的选用………………………………………3 1．2．4 X、Y向步进电机的选用 ………………………………………3 1．2．5 检测仪系统的硬件电路总体设计………………………………3 系统软件总体设计 ……………………………………………………5 本章小结 ………………………………………………………………6 凸轮综合检测仪硬件部分设计…………………………………………7 控制面板的设计………………………………………………………7 主机板的设计…………………………………………………………8 2．2．1 CPU及其存储器电路设计………………………………………8 2．2．2 键盘与显示器电路设计 ………………………………………9 2．2．3 四倍频接口电路设计及计数器的选用………………………11 2．2．4 步进电机驱动接口电路设计…………………………………12 2．2．5 打印机驱动接口电路设计……………………………………12 2．2．6 串行通讯接口电路设计………………………………………13 2．3 系统总电路原理图的绘制……………………………………………13 2．4 本章小结………………………………………………………………14 凸轮综合检测仪软件部分设计…………………………………………15 3．1 接口芯片的初始化程序设计…………………………………………15 3．1．1 8279的初始化程序8255（1）的初始化程序8255（2）的初始化程序8253的初始化程序The Exploitation of Synthetic Measuring Device for Cams ABSTRACT A kind of synthetic measuring device for cams is designed in the paper. It can measure the ascending distances and phase-angles of cams during the process of camshaft manufacturing. The ascending distances are measured with grating-scale and the phase-angles are measured with rotating encoder. The device can check up various kinds of cams or camshafts because of its parameters setting function. The detected data is displayed in LED and stored in RAM and can be printed by printer, too. The instrument can also be connected with personal computer to generate real model of cam and give a measuring result from the comparison between the real measuring model and the stored ideal model. Keywords: cam; synthetic measuring device; ascending distance; phase-angle; grating scale; rotating encoder 引 言 凸轮轴是内燃机的一个核心部件，内燃机的使用寿命很大程度上取决于凸轮轴的精度。凸轮轴中凸轮的升程和相位角是两项关键的技术指标，在凸轮轴的制造过程中，升程和相位角的检测，行业生产厂家大多采用阿贝测长仪和光学分度头进行。在实际生产检测过程中，这些检测仪效率低、设备投资大、专业化程度高、操作繁琐、通用性差。如对一根单缸凸轮轴的进、排气凸轮的升程、油泵凸