最后介绍了扫描曲面的造型方法在实际车身零件曲面造型中的应用。
In the end, the paper introduces the application of the swept surface modelling methods in the practical surface modelling of autobody parts.
提出一种实现刀具扫描体与曲面矢量求交的有效算法。
An effective algorithm is presented here for seeking and realizing the intersection of tool sweep volume with surface vector.
本课题的研究对于空间曲面的复杂工件的扫描测量具有重要的参考价值。
To the scanning measurement of other complicated workpieces with space curved surface, it has very important referenced value.
采用曲面的表面法矢建立了毛坯的几何模型，结合扫描体代数方程，实现了加工仿真和NC代码验证算法。
Surface normal vector technique is used to setup geometry models for blanks. Combined it with s AE, we implement algorithm for NC machining simulation and Verification.
设计过程中按推导出的数学方程构造各段螺旋线，并以该螺旋线作为扫描轨迹，遵循范成法原理包络出螺杆的各段螺旋曲面。
The varying pitch helixes were constructed on the parameter equation, and were selected as sweep trajectory; the surface of the screw was enveloped on the generating method.
从测量速度和精度两方面考虑，提出采用圆弧切线外插算法控制激光束跟踪扫描，实现曲面的自适应跟踪测量。
It is that the measurement point can be predicted via the arc extrapolation method and can be adaptive to sense the change of the free-form surface.
材料和方法：用Siemens螺旋CT扫描机，对20例共25颗上颌埋伏阻生前牙患者进行螺旋CT横断面扫描，并进行曲面、三维重建。
Materials and Methods:20 patients with 25 un-erupted and impacted teeth were scanned by Spiral CT and processed by dental reconstruction with SIEMENS spiral CT scanner.
介绍了激光扫描系统的原理，三角法测量原理，激光扫描仪的结构特征以及曲面拟合有关问题。
The principle of the laser scanning system, principle of triangulation measuring method, the structure characteristics and the relative affairs about surface fitting of laser scanner are introduced.
细化点曲线时，细化扫描会稍微更改曲面的曲率。
As when you refine a point curve, refining a sweep can change the curvature of the surface slightly.
在激光扫描大型三维曲面测量中， 激光光斑中心的准确定位是提高测量分辨力的关键。
The precise location of the laser spot center is an important step to raise the measurement resolution in large 3-D surface profile measuring system of laser scanning.
将扫描体与复杂曲面法矢的求交问题，转化为三角网格与有向线段之间的求交计算。
The intersection of sweep volume with complicated surface normal is transformed into computation of intersection between triangular mesh and directed line segment.
介绍了以反求工程为技术支撑的自由曲面数控加工的基本原理和全过程，并对其中的数字化扫描、CAD建模及刀具轨迹生成等关键技术作了进一步的分析。
Basic theory and procedure of NC machining for free-form surface based on reverse engineering were introduced. Digital measure and CAD modeling as well as tool path generating were analyzed.
另外，对自由曲面的数字化展示了该数字化策略强大的扫描线点云采集能力。
In addition, for the digitization of free surface object, the digitization strategy represents the powerful sampling capability of scanning line point cloud.
在深入研究上述方法的基础上，提出了一种自由曲面的非接触自动测量方法，介绍了测量系统的构成、曲面边缘的提取、自动扫描方式的规划以及测头跟踪方式等设计要点。
On the basis of a thoroughgoing study of the above methods, a non contact method for measuring free form surface automatically is given, and some key techniques are also described.
在深入研究上述方法的基础上，提出了一种自由曲面的非接触自动测量方法，介绍了测量系统的构成、曲面边缘的提取、自动扫描方式的规划以及测头跟踪方式等设计要点。
On the basis of a thoroughgoing study of the above methods, a non contact method for measuring free form surface automatically is given, some key techniques are also described.
细化点曲线时，细化扫描会稍微更改曲面的曲率。
The Completely Equal Curvature of Tubular Surface on Viviani s Curve;
利用UG软件的相关功能，生成直齿圆锥齿轮的当量齿轮的齿廓曲线，并沿分度圆锥母线扫描获得齿廓曲面片体；
By using the related method of UG, the profiles of virtual gear are generated, the profile surface is formed by swept along the generater of graduation cone;
针对复杂曲面数据测量及曲面重构的要求，以玩具狗头为例，介绍使用三维激光扫描仪的自由曲面反求过程中产品点数据的处理方法，以及CAD模型的重构技术，分析了反求建模中存在的问题。
The processing methed of data tested by laser scanner and reconstruction technology of CAD model in the reverse process of free-form surface were persented with toy of dog head as example.
针对复杂曲面数据测量及曲面重构的要求，以玩具狗头为例，介绍使用三维激光扫描仪的自由曲面反求过程中产品点数据的处理方法，以及CAD模型的重构技术，分析了反求建模中存在的问题。
The processing methed of data tested by laser scanner and reconstruction technology of CAD model in the reverse process of free-form surface were persented with toy of dog head as example.
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