中科新闻网海贼王vr游戏公布截图:拜托能人帮我----汉译英2
来源：百度文库 编辑：中科新闻网 时间：2024/05/05 05:16:24
目前，在国际市场上已出现了一些用于产品逆向设计的应用软件，如美国Imageware公司的Surfacer7．1，英国Renishaw公司的TRACE，英国MDTV公司的STRIM and Surface Reconstruction等，英国DelCAM公司产品CopyCAD；此外，一些CAD／CAM系统。如美国PTC公司的Pro；Engineer 2000i、美国UGS公司的Unigraphics与美国IBM公司的CATIA等在其系统中也集成了可实现逆向三维造型设计的模块，但与专业的逆向工程软件比较在功能上有较大局限性。例如：Surfaccr7．1逆向设计软件可方便的实现下面几项功能：1)接受不同来源的扫描资料点的分析与处理。如CMM.Laser，sensors，Ultrasound等；2)快速、准确地将扫描点转换成NURBS曲面；3)对曲面模型的精度、品质进行评价；4)对曲线、曲面的形状实现交互修改。在产品的曲面模型重建时。Surfacer7．1不需经过建造曲线来构造曲面而是直接由扫描点来直接产生曲面；或采用建立周边曲线再用该边界与其内部的扫描点群来产生曲面；也可首先在扫描点群中构造NURBS曲线，再由曲线来产生曲面。
4 结 论
展望未来．伴随着计算机硬件与软件技术条件的发展，逆向设计法所具备的起点高、成本低、周期短、易改型、易创新的优势会日渐明显，该方法必将成为现代工业造型设计师实现产品造型设计的首选方法之一。
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3 An applied software that useds for the contrary design
Currently, at international have already appeared some pplied softwares that used for the contrary design of product on the market, such as the Surfacer7s of the American company of Imageware.1, the TRACEs of the British company of Renishaw, the STRIMs and Surface Reconstruction etc.s of the British company of MDTV, British DelCAM company product CopyCAD;In addition, some system of CAD/ CAM.Such as the Pro of the American company of PTC;The Unigraphics of the 2000 is of Engineer, American company of UGS and CATIA etc. of the American company of IBM at it also gathers in the system can carry out the contrary three 维 shapes design of the mold piece, but compare with the contrary engineering software of the profession to on the function compare the general situation limit.For example:Surfaccr7. the 1 contraries design software can convenient realization underneath a few function:1)Accept the different source scans the analysis and the processing that the data order.Such as the CMM. Laser, sensors, Ultrasound etc.;2)Fast, will scan to order the conversion accurately curved face of NURBS;3)Carry on the evaluation to the accuracy, quality of the curved face model;4)Hand over to the shape realization of the curve, curved face to modify with each other.At the curved face model of the product rebuild.Surfacer7.1 not need to pass by to construct the curve to construct the curved face but is directly from scan to order to come to direct creation curved face;Or the adoption build up the peripheral curve to scans some cluster inner part with it to produce the curved face with that boundary again;Also can first the structure NURBS curve in scan some cluster, is produced the curved face by the curve again.
4 Knot theory
Prospect the future. accompany with the conditional development of the calculator hardware and the software techniques, the point of departure that the contrary design method have is high, the cost is low, the period is short, remodels easily, easy creative advantage would gradually obvious, that method necessarily will become the modern industry shape the designer carries out the head of the product shape design to choose one of the methods.