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Dot-Projection Photogrammetry and Videogrammetry of Gossamer Space Structures

机译:游丝空间结构的点投影摄影测量和录像测量

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This paper documents the technique of using hundredsrnor thousands of projected dots of light as targets forrnphotogrammetry and videogrammetry of gossamer spacernstructures. Photogrammetry calculates the three-dimensionalrncoordinates of each target on the structure, andrnvideogrammetry tracks the coordinates versus time.rnGossamer structures characteristically contain large areas ofrndelicate, thin-film membranes. Examples include solar sails,rnlarge antennas, inflatable solar arrays, solar powerrnconcentrators and transmitters, sun shields, and planetaryrnballoons and habitats. Using projected-dot targets avoids thernunwanted mass, stiffness, and installation costs of traditionalrnretroreflective adhesive targets. Four laboratory applicationsrnare covered that demonstrate the practical effectiveness ofrnwhite-light dot projection for both static-shape and dynamicrnmeasurement of reflective and diffuse surfaces, respectively.rnComparisons are made between dot-projectionrnvideogrammetry and traditional laser vibrometry forrnmembrane vibration measurements. The paper closes byrnintroducing a promising extension of existing techniquesrnusing a novel laser-induced fluorescence approach.
机译:本文介绍了使用成百上千个投射光点作为游丝间隔结构的摄影测量和视频测量的技术。摄影测量法计算结构上每个目标的三维坐标,而摄影测量法则跟踪坐标与时间的关系。游丝结构通常包含大面积的精美薄膜。示例包括太阳帆,大型天线,可膨胀太阳能电池阵列,太阳能集中器和发射器,遮阳罩以及行星气球和栖息地。使用投影点靶可避免传统的反光胶粘靶的不必要的质量,刚度和安装成本。涵盖了四个实验室应用,分别证明了白光点投影在反射和漫反射表面的静态形状和动态测量中的实际有效性。在点投影视频摄影法和传统的激光振动膜膜振动测量之间进行了比较。本文以引入一种有前景的,使用新型激光诱导荧光方法的现有技术扩展为结尾。

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