活检针自动参数化设计以及优化集成系统的开发

发布时间：2018-04-16 05:15

本文选题：穿刺活检 + 活检针　；参考：《山东大学》2016年硕士论文

【摘要】：穿刺活检是基于活检针来获取所需的人体软组织样本,并利用电镜病理细胞学检测来诊断病症的一种方法。活检针作为穿刺活检中的基本工具,其几何结构对穿刺效率和精度有重大影响。目前临床上使用的活检针针尖切削刃几何形状比较单一,穿刺效率和精度都有待提高。当前,活检针的设计主要依赖设计者的经验,往往受限于已存在的活检针,很难突破已有结构设计出穿刺效率和精度高的活检针。针对这种问题,本文开发了活检针自动参数化设计以及优化集成系统,实现了活检针的自动化、参数化、系统化设计与开发,避免了活检针模型创建过程中的重复劳动,提高了活检针设计以及开发的效率。本课题的主要工作如下：活检针针尖切削刃几何结构建模。基于类比的方式,穿刺活检中活检针刺入软组织可以看成是金属刀具切削材料,其中活检针类似金属刀具是穿刺活检的基础器械。基于金属切削刀具的分析方法,建立活检针的几何结构模型,并分别计算活检针针尖切削刃的前角和刃倾角,为不同活检针切削性能的简单判定提供依据。基于Pro/Toolkit开发复杂曲面活检针参数化设计系统。针对ABAQUS中无法精确创建曲面模型,本文基于Pro/Toolkit对Pro/E进行二次开发,建立复杂曲面活检针参数化设计系统。详细介绍了Pro/Toolkit中二次开发的关键技术以及复杂曲面活检针参数化设计系统的应用程序设计过程。复杂曲面活检针参数化设计系统的设计对象的参数化驱动。为了避免设计人员在复杂曲面针模型创建过程中的重复劳动,本文基于Pro/Toolkit零件参数化,运用三维模型与程序控制相结合的方法,实现了复杂曲面针参数化设计系统的参数化设计。活检针自动参数化设计与优化集成系统开发。基于ABAQUS二次开发中的自定制应用程序开发了活检针自动参数化设计与优化集成系统,实现了简单平面针自动参数化建模以及复杂曲面活检针的模型导入。并基于MATLAB和Python的接口,实现了活检针针尖切削刃上前角和刃倾角的自动计算以及分布曲线图的绘制,让设计人员对设计与优化的活检针切削性能有了一个直观的了解。
[Abstract]:Biopsy is a method based on biopsy needle to obtain the required human soft tissue samples and to use electron microscopic cytology to diagnose the disease.As a basic tool in biopsy, the geometric structure of biopsy needle has great influence on the efficiency and precision of puncture.At present, the cutting edge geometry of biopsy needle used in clinic is simple, and the puncture efficiency and precision need to be improved.At present, the design of biopsy needle mainly depends on the designer's experience, and is often limited by the existing biopsy needle, it is difficult to break through the existing structure to design the biopsy needle with high efficiency and precision.In order to solve this problem, the automatic parameterization design and optimization integrated system of biopsy needle are developed in this paper, which realizes the automation, parameterization, systematic design and development of biopsy needle, and avoids the repeated work in the process of creating biopsy needle model.The efficiency of design and development of biopsy needle is improved.The main work of this paper is as follows: modeling the geometric structure of needle tip cutting edge.Based on analogies, the biopsy needle can be regarded as the cutting material of metal cutting tool, in which the needle is similar to the metal tool and is the basic instrument of the puncture biopsy.Based on the analysis method of metal cutting tool, the geometric structure model of biopsy needle is established, and the anterior angle and edge dip angle of needle tip cutting edge are calculated respectively, which provides the basis for the simple judgment of cutting performance of different biopsy needle.A parameterized design system for complex curved needle biopsy was developed based on Pro/Toolkit.In view of the fact that the surface model can not be precisely created in ABAQUS, a parameterized design system for complex curved surface biopsy needle is established in this paper, which is based on the secondary development of Pro/E based on Pro/Toolkit.The key technology of secondary development in Pro/Toolkit and the application program design process of parameterized design system for complex curved needle biopsy are introduced in detail.Parametric drive of parametric design system for complex curved biopsy needle.In order to avoid the repeated work of the designer in the process of creating the needle model of complex curved surface, based on the parameterization of Pro/Toolkit parts, the method of combining 3D model with program control is used in this paper.The parametric design of the needle parameterized design system for complex curved surface is realized.Development of automatic Parametric Design and Optimization system for biopsy Needle.An integrated system for automatic parameterization design and optimization of biopsy needle is developed based on the custom application program in the secondary development of ABAQUS. The automatic parameterized modeling of simple planar needle and the model import of biopsy needle with complex curved surface are realized.Based on the interface of MATLAB and Python, the automatic calculation of cutting edge angle and edge inclination angle and the drawing of distribution curve are realized, which makes the designer have a direct understanding of the design and optimization of the cutting performance of the needle.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP311.52;R730.4

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