【作者】 谭文斌；

【导师】 李醒飞；

【作者基本信息】 天津大学 ， 测试计量技术及仪器， 2008， 硕士

【摘要】 回转体工件的生产在制造行业中占有很大的比重,由于内燃机的广泛使用,气缸套、活塞等回转体工件在国民经济中更是占有极重要的地位,而随着现代工业的快速发展,传统的回转体检测仪器不能很好地满足高精度在线检测的要求,从而对高精度高效率的回转体检测仪器研制提出了要求,本课题的研究即是在这种形势下开展的。本文设计的通用回转体测量仪在检测原理上属于坐标测量,是一种将接触和非接触两种探测技术结合的坐标测量系统,能够很好地满足工业生产提出的高精度快速高效检测的要求,且具有较好的通用性和开放性,并在一定程度上实现了仪器的智能化。论文主要研究内容和工作如下:根据回转体的特点,对传统的标准三坐标测量机进行改造,更适合于回转体的检测,并节省了仪器的制造成本;将接触和非接触测量结合,继承两者的优势,使仪器能同时具备高精度和快速高效的优点;建立了以“PMAC+IPC”的双CPU硬件结构为基础的运动控制系统,再与开放性良好的测量软件相结合,使仪器具有较好的开放和扩展性;使用各硬件模块搭建了完整的运动控制系统,对该系统的参数进行合理的设置与调试,并通过PMAC实现了手轮功能、触发式测头的保护以及典型的操作面板等功能;编写了智能化的测量软件,说明了测量软件的设计思想和实现方法,并给出了一键快速测量的详细实现框架和步骤;根据国家或行业的相关安全标准,对仪器进行了预先危险性分析,并采取了多种安全保护措施保障仪器中的安全可靠运行;对检测仪进行了测量系统分析(MSA),分别对仪器的偏倚、稳定性、线性以及重复性和再现性等重要统计特性进行了研究,并根据MSA的判定原理和流程对仪器进行了实际评定。更多还原

【Abstract】 The total production of axisymmetric workpiece has accounted for a large percentage of manufacturing industry. Along with wide application of internal-combustion engine, axisymmetric workpiece such as cylinder liner, plunger has played more and more important role in national economy. With the rapid development of modern industry, the traditional axisymmetric workpiece detector can no longer fulfills the requirement of on-line detection, axisymmetric workpiece detector of high precision and high efficiency has become the trend of development.This paper presents a general detecting instrument of axisymmetric body using a coordinate measuring system based on the combination of the contact measurement and non-contact measurement. It can fulfill the requirements of industrial production as high precision and on-line detection, and it also has advantages like good generality and openness. Besides these, it is an intelligent instrument to some extent.The main research works are as follows.According to the characteristics of the axisymmetric body, the traditional and standard CMM is reformed to make this instrument be more suitable for the detection of the axisymmetric body, and to lower manufacturing cost. This instrument inherits advantages of the contact measurement and non-contact measurement, so it has both high precision and high efficiency. It also has good openness and expansibility, because its motion control system is based on a dual CPU architecture composed by PMAC and IPC, and also because its measurement software has good openness. This paper presents a complete motion control system with various hardware modules and makes reasonable parameters for it. This system uses PMAC to complete functions such as handwheel, protection of the touch trigger probe and operation panel. Intelligent measurement software is edited for this instrument, and the designing thought, realizing method of the whole software and the detailed implementation steps for one-key fast measurement are included in this paper. According to relevant country or industry safety standards, the preliminary hazard analysis is made, and some safety measures are taken to ensure the safety and reliability of the operation. The basic principle of MSA is introduced, and bias, stability, linearity, repeatability, reproducibility and other important statistical characteristics are researched as its main contents. Finally this paper makes a actual evaluation for this instrument according to the assessment methodologies and procedure of MSA.更多还原