【作者】 陈希；

【导师】 王双保；

【作者基本信息】 华中科技大学 ， 软件工程， 2016， 硕士

【摘要】 随着科技和技术的不断发展,冶金和一些金属相关领域对光电直读光谱仪提出了更高的要求。近些年发展起来的CCD火花直读光谱仪较好地满足了很多需求,CCD火花直读光谱仪除了具有传统直读光谱仪的优点:测量精度和准确度高、操作简单以外,还可以进行全谱测量,这是现阶段采用光电倍增管(PMT)的直读光谱仪所不具有的功能。这很大程度源自于CCD火花直读光谱仪的特殊光学结构和采用的CCD传感器。作为CCD直读光谱仪器来说,其光学结构大部分采用罗兰圆光学结构,也是整个系统设计的核心部分。本文首先介绍了CCD火花直读光谱仪的基本原理和组成结构,着重分析了罗兰圆光路结构的光学零部件。之后采用ZEMAX光学软件对其光路结构进行了仿真和分析,并选用白口铸铁中的Fe、C、P、S四种元素的特征谱线参数进行了光学仿真分析,通过分析确定了相关光学元器件的基本参数,并进行了优化来获得理想光路的相关参数,根据公差仿真分析了对应谱线的分布。并基于光线仿真效果评价进行了元器件公差以及机械夹具的公差分析,为光学元件机械夹具设计提供了具体要求,最后利用UG软件对光路上的各个机械结构进行了设计,并实现了整个光路结构的加工和安装。还对其安装误差等问题进行了一定程度地分析和讨论,最后予以实验测试和验证。这些都提供了较为准确和直接的设计参考。更多还原

【Abstract】 With the development of science and technology,more and more metallurgical industry and the fields relate to metallic manufacturing increases requirements to the elemental checking. The spark direct reading spectrometer with CCD was invented and developed to respond to the some of the requirements, it has the basic advantages that other direct reading spectrometer owned: high measurement accuracy and high precision, simple to operate,besides, it can measure the full elemental spectrum of the samples. At present, the spark direct reading spectrometer with PMT doesn’t have the function. Objectively, the system very depends on the optical structure and the CCD device. The main optical structure is a Rowland circle, the design of the optics and the physical structure is the main works.Firstly, this article introduces the basic principle and construction of the spark direct reading spectrometer with CCD, then we put emphasis on analyzing the Rowland light path structure: the basic optical element and the mechanical fixture. After the simulation and analysis of light path structure of the Rowland circle by choosing the characteristic lines of Fe、C、P、S elements in a white cast iron to optimize and determine basic parameter of the optical components, on this basis, we make the basic analysis on assembling tolerance and the distribution of the corresponding spectral line, then to determine the parameter of the ideal light path structure. Lastly, the optical structure was simulated and realized by the mechanical designing soft-ware UG, it provide a practical route to the realization of the design. In addition, the assembly error was also analyzed and discussed refer to the UG design and a final measurement is performed to prove the design. All of these provide a visual design reference.更多还原