《高频相位检测系统设计》-毕业论文.doc

毕业论文（设计） 题 目 高频相位检测系统设计 系 部 机械工程系 专 业 机械设计制造及其自动化 年级 学生姓名 　 学 号 指导教师 高频相位检测系统 【摘要】 高频相位检测系统是根据轮廓仪的设计需要而研制的，它主要研究如何将高频信息从信号中提取出来，在这里主要是要解决：如何利用现有的低频测量系统来实现高频测量，解决如何将高频信号转换到低频测量系统的测量范围，就需要处理好信号的采集，混频器的设计，以及选择合适的取样脉冲以实现信号的降频，在取样器中就涉及到取样滤波器、信号发生器、相位比较器的设计。在低频部分，主要研究的内容分三个部分：相位测量仪部分，移相信号发生器，移相网络。低频部分信号的采集，可以通过单片机来控制。相位差的测量主要是将转换的低频信号的高电平用频率稳定的脉冲来填充，通过记录测量脉冲个数来实现相位差的测量，相位差就是由两输入信号相异或的高电平脉冲个数与信号脉冲个数相比得到。 【关键词】 高频 高频相位 相位检测 相位检测系统 High-frequency phase detection system 【Abstract】 The check and measure system of the high frequency phase was designed，which was needed by apparatus of contour ,it mostly investigate how to distill the high frequency information from the signal .It mostly solve how to use the existing low frequency measure system to measure the high frequency signal and how to transform the high frequency signal to low frequency signal ,so we have to dispose the signal’s collection ,the mixer’s design ,and choose the right sampling pulse to debase frequency .the sampling utensil come down to how to design the filter,signal befallen utensil and phase compare utensil .The low frequency part divide into three part which are the phase’s measure, phase changing signal generator and phase changing meshwork .The signal’s collection of the low frequency part could be controlled by the SCM. The measure of the phase’s difference mostly use the steady pulse to fill the low frequency signal ,and register the number of the pulse ,and then we could get hold of the phase’s difference. the phase’s difference is the ratio of the number of the pulse. 【Key words】 The high frequency The high frequency phase The check and measure of the phase The check and measure system of the high frequency phase 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc263322885 1 序言 PAGEREF _Toc263322885 \h 1 HYPERLINK \l _Toc263322886 1.1 高频测量