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提出了一种基于电场的VFTO测量方法,以实现气体绝缘变电站(Gas Insulated Substations GIS)开关操作引起的快速暂态过电压(Very Fast Transient Overvoltage VFTO)的测量.通过MEMS电场传感器测量GIS母线周围的电场,进行大量试验确定电场强度与母线电压的线性关系,并对传感器进行标定,实现VFTO的测量.从理论上对GIS变电站不同负载的VFTO建模并进行仿真数值计算;使用扫频法、方波响应法对电场传感器的响应特征进行了测试,高频截止频率>134 MHz;在实验室内进行了高幅值电压测量实验,在云南电网公司超高压试验研究基地进行GIS变电站现场VFTO测量实验,结果表明利用电场传感器能够进行快速暂态过电压的测量. 相似文献
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提出并研制了一种二维电场检测传感芯片,将四个电场测量微型单元和旋转式驱动微结构集成在3. 5 mm ×3. 5 mm的敏感结构上,实现了单芯片的电场二维测量.介绍了传感器的工作原理、敏感结构的设计,以及基于绝缘体上硅( SOI)工艺的单芯片微型二维电场传感器制备工艺技术.成功研制出传感器原理样机,研究了微型二维电场传感器的标定方法,开发了用于电场二维标定的测试装置,并在室温常压下对传感器进行了二维标定.实验结果表明:该传感器能够有效减小电场的轴间耦合干扰,测量误差优于7. 04%,线性度可达到1. 25%. 相似文献
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针对目前触觉传感器研究中不能兼有柔韧性和多维力测量等难题,设计了一种基于力敏导电橡胶的具有整体两层非对称网状式结构的触觉传感器,通过检测导电橡胶的电阻值变化来分析三维力信息。本文介绍了该传感器的基本结构,并基于理想力敏导电橡胶的力学特性建立了三维力并行测量的数学模型,通过对该模型的求解解决了三维力及各受力点之间复杂的耦合问题。仿真实验结果表明该传感器能够实现对表面任意单点三维力、多点三维力以及三维面力信息的测量。 相似文献
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Three‐dimensional lenticular display synthetic image rendering based on light field acquisition
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Renjing Pei Zheng Geng Kui Ma Mei Zhang Rong Wang 《Journal of the Society for Information Display》2017,25(2):117-125
Crosstalk is a critical defect affecting image quality in multiview lenticular 3D displays. Existing optimization methods require tedious computations and device‐specific optical measurements, and results are often suboptimal. We propose a new method, on the basis of light field acquisition and optimization, for crosstalk reduction in super multiview displays. Theory and algorithms were developed, and experimental validation results showed superior performance. 相似文献
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本文介绍了对箭载电场仪数据的处理及分析软件。该软件是将电场仪及其搭载设备所提供的原始数据转换成可用的子午工程数据产品,主要实现原始科学数据的格式转换和附加电场的处理。文章阐述了数据处理方法及软件的具体功能,以及软件设计的核心算法,该系统功能完善。 相似文献
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Computing hierarchical curve-skeletons of 3D objects 总被引:6,自引:0,他引:6
Nicu D. Cornea Deborah Silver Xiaosong Yuan Raman Balasubramanian 《The Visual computer》2005,21(11):945-955
A curve-skeleton of a 3D object is a stick-like figure or centerline representation of that object. It is used for diverse
applications, including virtual colonoscopy and animation. In this paper, we introduce the concept of hierarchical curve-skeletons
and describe a general and robust methodology that computes a family of increasingly detailed curve-skeletons. The algorithm
is based upon computing a repulsive force field over a discretization of the 3D object and using topological characteristics
of the resulting vector field, such as critical points and critical curves, to extract the curve-skeleton. We demonstrate
this method on many different types of 3D objects (volumetric, polygonal and scattered point sets) and discuss various extensions
of this approach. 相似文献
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鸟击事件是威胁航空安全以及导致航空事故发生的最主要原因之一.鸟类生态调查研究和鸟击风险防控是机场必要的日常业务.为了使机场鸟击防范工作更有针对性,对存在于三维空间中抽象的鸟击风险评估结果进行可视化具有重要应用价值.本文提出一种基于游戏引擎的鸟击风险三维可视化方法,并以厦门翔安国际机场为例,开发了一套鸟击风险可视化系统来实现该方法.构建了机场周边10×40平方公里上空的三维地理场景及鸟击风险三维标量场,叠加机场净空区三维模型,根据鸟情观测数据,模拟鸟类飞行路径,最后通过摄像头漫游与飞机飞行模拟的方式实现了风险场场景的沉浸式动态展示.该系统可为机场飞行安全管控提供辅助决策支持. 相似文献
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《Displays》2021
Various 3D displays have been proposed to show realistic and vivid 3D images. Moreover, 3D displays have been applied in various fields including medicine, entertainment, and advertising. Depending on the application, 3D displays have different pixel structures and sizes. In this paper, we present a 3D-display design method that can be applied regardless of the pixel structure and display sizes. The area of the designable 3D display is suggested by the improved 3D image quality. The manufactured displays are used to verify the proposed method. Furthermore, a light field simulation is performed to confirm the area that was not proven by the manufactured displays. With the proposed 3D image-quality model and 3D image simulation by the light field representation, a general design of 3D displays with various pixel structures can be developed. 相似文献