多功能纤维电子强伸仪

本文报道了新设计制成的多功能纤维电子强伸仪.对这一仪器的结构、原理、性能、应用及主要部分的设计,作了概括的叙述.文中指出,本仪器的重要特点是采用步进电机和集成电路数字控制的传动系统.这种仪器除能作出拉伸图外,还附有强力、伸长、反复拉伸次数和断裂功等自动显示装置.     

Evaluation of Image-Analysis-Based Drape Tester

The performance of image-analysis-based drape tester is studied by analyzing the testing results. The accelerating and decelerating method is used to make the initial testing condition same before draping. A feature vector is proposed to describe the drapeability of fabrics comprehensively. Moreover, the exponential relationship curves between drape coefficient and rotating speed are obtained from the drape tester to describe the dynamic drapeability. Finally, the stability of tested results of image-analysis-based system is studied.     

棉纤维长度测试钩夹取样法研究

在微量点取样的研究基础上,进一步探讨了取样器从“均匀分布散纤维”中取样时其夹持宽度及取样角度对纤维照影机曲线的影响,分析了取样影响因素,根据研究结果得到了理想试样的取样要求,据此提出一种钩夹取样方法并通过实验说明这种方法具有可行性。     

服装CAD中三维人体数据处理与曲面拟合

讨论了三维人体数据的处理过程,介绍了NURBS曲面的拟合理论和NURBS用于三维人体曲面拟合的具体实施过程。     

虚拟环境中三维贴体衣片的设计

介绍了在虚拟环境中利用鼠标和三维空间交互球选取并控制人体模型上的点，将之作为三维衣片边界上的点，结合相应的数据结构，得到三维衣片轮廓线的点、边、衣片结构，接着利用插值的方法生成边界内的点，然后Delaunay三角化，生成衣片的三角面片，并将之演示出来。本文的创新点主要有以下几方面：开发了一个三维衣片设计系统，该系统集成了一套小型虚拟现实系统(小型立体显示观察系统和三维空间交互球)，在该系统生成的三维虚拟环境中，设计者可以引入由美国(10)公司三维人体测量系统生成的真实人体模型，在此基础上自由设计三维衣片，该系统提供了一些交互手段，使设计者可以像在真实三维环境中设计衣片一样，提供了直观的设计效果，该系统是用VC 6．0和opengl开发的；介绍了一种新的插值方法，利用这种特定的方法，可以得到符合人体且具有一定空隙量的贴体三维衣片；对Delaunay三角化生成的三角衣片，进行了改进，去掉了位于三维衣片凹边外的部分，从而得到了完全符合衣片设计轮廓的三维衣片。     

The Analysis of the Untwisting and Retwisting Methods in Determining the Twist of OE Yarn

The twists of twelve kinds of the cotton OE yarns in different machine twists and different yarn linear density have been determined by one time back twisting and twisting method, triple twisting method and double twisting method. The quantitative analysis of the measurement principles of all the untwisting and retwisting methods has been made by the writers. It is theoretically and practically concluded that for twelve kinds of the cotton OE yarns the difference between the twist determined by triple twisting method and machine twist is the lowest and there is measuring method error in determining the twist of OE yarn by all the untwisting and retwisting methods.     

Measurement of Wool Fiber Diameter by Image Analysis

Fiber diameter is the most important raw wool property determining price, processing potential and end use. In this paper, a digital - image- processing algorithm is described for automatically measuring the diameters of wool fibers from microscope images. Experiment result shows that the system is fast, reliable and accurate.     

The Mechanism of Negative-ion Generation of Natural Fiber Fabrics

Generally there are three kinds of substances used as negative-ion generator in textiles, natural silicate minerals （ceramic/tourmaline）, natural rare-earth minerals and natural sediment with ultra-fine pores. Based on different additive, the mechanism of negative-ion generation is largely divided into three kinds, the piezoelectricity and pyroelectricity of tourmaline crystal, air ionization caused by low-level radiation and breaking up of the clusters of moisture in air when going through the ultra-free pores of natural sediment. In this paper, the negative-ion generating properties of natural fiber fabrics-cctton, wool, silk and linen were first proposed. By some kind of physical stimulation, rubbing or vibrating, natural fiber fabrics without any additive could also emit negative ions. Considering that the piezoelectric effect was observed in wool fibers, silk fibers and cellulose fibers, the piezoelectricity was studied as a mechanism of negative-ion generation of natural fiber fabrics. Another possible mechanism was the tribeelectricity produced by the sense of ntbbtng or vibrating and tip discharge of hairiness. The Final experiment results verified that the latter would be the main reason, and the electrolytic dissociation of moisture was also contributing to negative-ion generation.     

服装CAD中三维数据的拾取与服装造型点的生成

讨论了在二维屏幕上拾取三维人体模型数据点的几种方法,并讨论一种服装款式的造型方法,即通过直接在屏幕人体模型上绘制衣片轮廓线和计算衣片曲面和人体间偏离值来获得款式造型关键点。由此可通过人机交互方式生成和修改三维服装款式。     

应用于试衣系统人体建模的点云数据预处理方法研究

对点云数据分层，然后对层截面数据采用柱面坐标排序。对每层截面离散点运用最小二乘拟合后再用B样条基函数加权，由此推算出截面中心和对称线。在此基础上找出特征点备后续构造曲面模型使用。