科学仪器类专业硕士论文代写：有关转轴径向跳动和转速实时检测光电系统的探索与研究
目录：
摘要 4-5
Abstract 5-6
第1章绪论 10-21
1.1课题的来源及研究意义 10-11
1.2径向跳动的研究现状 11-14
1.2.1打表法 11-12
1.2.2电涡流传感器测量法 12-13
1.2.3CCD测量法 13-14
1.3转速测量研究现状 14-17
1.3.1定时计数法 15-16
1.3.2定数计时法 16
1.3.3同步计数计时法 16-17
1.4光纤传感器的研究现状 17-19
1.4.1反射式光纤位移传感器 18-19
1.4.2透射式光纤位移传感器 19
1.5本文研究主要内容 19-21
第2章测量系统的总体结构设计 21-29
2.1径向跳动测量的基本原理 21-25
2.1.1径向跳动分析 21-22
2.1.2反射式光纤传感器工作原理 22-25
2.2径向跳动测量系统总体设计 25-26
2.3转速测量原理 26-27
2.4转速测量系统的总体设计 27-28
2.5本章小结 28-29
第3章系统硬件设计 29-40
3.1光纤传感器的硬件电路设计 29-32
3.1.1半导体激光器光源驱动电路 29-30
3.1.2光电接收器的选择 30-32
3.2数据采集电路 32-34
3.2.1PCI局部总线的性能 33
3.2.2模拟输入主要技术参数 33
3.2.3模拟输入码制以及数据与模拟量的对应关系 33-34
3.3转速测量系统电路设计 34-39
3.3.1光电编码器电路 34-35
3.3.2整形电路 35
3.3.3单片机测量电路 35-39
3.4本章小结 39-40
第4章系统软件设计 40-47
4.1转速测量程序 40-43
4.1.1RS－232概述 40-41
4.1.2基于MSComm控件的串口程序 41-43
4.2径向跳动测量程序 43-46
4.2.1标定程序 43-45
4.2.2测量程序 45-46
4.3本章小结 46-47
第5章实验数据处理和误差分析 47-56
5.1系统实验数据处理 47-51
5.1.1径向跳动测量系统静态稳定性测试 47
5.1.2径向跳动测量系统标定 47-49
5.1.3径向跳动测量系统精度实验和灵敏度实验 49-50
5.1.4径向跳动的测量实验 50
5.1.5转速测量实验 50-51
5.2误差源分析及解决方法 51-55
5.2.1数据采集误差 52
5.2.2系统标定误差 52
5.2.3测头相对位置误差 52-53
5.2.4被测表面曲率的影响 53
5.2.5被测表面情况不同的影响 53-54
5.2.6转速误差分析 54-55
5.3本章小结 55-56
结论 56-57
参考文献 57-60
附录1实验电路实物图 60-61
附录2实验设备实物图 61-62
附录3单片机内部程序 62-65
致谢 65
【摘要】 自20世纪60年代以来,由于空间技术及计算机技术等领域发展的需要,对零件的加工精度的要求不断提高。但高精度的机床的径向跳动却是影响机床加工精度的主要因素之一;对于汽轮机、燃气轮机而言,径向跳动又是安全稳定运行的关键参数。而转速也是旋转机械中非常重要的参数。本文针对传统的径向跳动测量方法中位移传感器的不足,提出了利用光纤传感器测量径向跳动的方案。光纤用于位移测量具有常规测量技术不可比拟的诸多优点,抗强电磁干扰能力强,可灵活柔性弯曲,可在某些特殊条件下进行测量。对于转速的测量,也提出了一种简单、精确和有别于传统方法的光电编码器测量方法。本文对转轴的径向跳动和转速测量进行了深入研究,包括以下几个方面的内容:径向跳动和转速测量的发展现状及常用原理;径向跳动测量系统光纤位移传感器的硬件电路研究;转速测量的硬件电路的研究与开发;系统软件的设计;处理实验数据、分析误差来源,提出系统改进建议。本文在径向跳动测量方面,为保证测量精度,采用光源的软启动电路和恒亮度控制电路;在转速测量方面,采用单片机作为数据处理的主控芯片,选择施密特触发器对光电编码器输出信号进行整形,实现了整个测量范围的高精度测量。在软件方面,以Visual C++为开发平台,对测量数据进行实时的处理、显示和保存。测量结果以图形直观显示。设计的转轴径向跳动实时检测光电系统,抗干扰能力强、精度高,应用软件可实时测量,快速处理、存储数据,测量结果动态图形显示;设计的转速测量系统简单易行、精度高。实验表明,径向跳动测量系统的静态稳定性误差小于0.53%,灵敏度可达1.38μm/mv;转速测量系统的相对误差为0.13%,满足设计要求。
硕士论文代写【Abstract】 Since 1960’s, the precision required for processing parts has continually improved as a result of development of space technology, computer technology and so on. But radial runout of a high-precision machine tool is one of the most important factors which influence the precision of processing parts. For steamships and gas turbines, radial runout is also the key parameter of running safely and steadily. Also rotary speed is an important parameter of rotary mechanical equipment.In allusion to deficiencies of traditional sensors, a project based on reflex fiber-optic sensor to measure radial runout is proposed. The technology based on optical fiber to measure displacement has many merits which normal measure technologies do not have, such as better capability of resisting strong electromagnetism interfere, flexible bend, even it can work in some special conditions. For rotary speed, a method of using photoelectric coder which is easier and more precise than traditional methods is proposed.This paper studies on radial runout and rotary speed measurement of rotary shaft, which involves these aspects: development situation and principles of radial runout and rotary speed measurement; measurement principle of reflex fiber displacement sensor which belongs to the measurement system of radial runout; research and design of hardware circuit of the system of rotary speed; design of software; experiment data processing, error sources analyses, and presenting advice for system enhance.Considering radial runout measurement, LD soft-startup circuit and constant luminance control circuit have been adopted. Considering rotary speed measurement, SCM (Single Chip Micyoco) is used as the main control chip and Schmitt trigger is also chose to plastic the signal coming from photoelectric coder for ideal pulse signal. SCM enhances the precision of the rotary speed measurement system.Considering software, Visual C++ is chose as the development platform. The software can process data, store and display the measuring results. Measuring result is displayed intuitionally in form of graph. The photoelectric radial runout measurement system designed for rotary shaft, can better resist strong electromagnetism interfere and have high precision. The software can measure real-time, process and store data fast, display measuring result with dynamic graph. The rotary speed of rotary shaft measurement system is easy to realize and has high precision. Experiments have shown that the relative error of the radial runout measurement system’s static stability less than 0.53% and its sensitivity can reach 1.38μm/mv; the relative error of the rotary speed measurement system is 0.13% which achieves design demand.
【关键词】 径向跳动； 转速； 光纤传感器； 光电编码器； 单片机；
【Key words】 radial runout； rotary speed； optical fiber senso； photoelectric coder； SCM；