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首页> 外文会议>Speckle 2010: Optical metrology >Electronic Speckle Pattern Interferometry technique for the measurement of complex mechanical structures for aero-spatial applications
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Electronic Speckle Pattern Interferometry technique for the measurement of complex mechanical structures for aero-spatial applications

机译：电子散斑干涉技术，用于测量航空航天应用中的复杂机械结构

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Using the electronic speckle pattern interferometry (ESPI) technique in the in-plane arrangement, the coefficient of thermal expansion (CTE) of a composite material that will be used in a passive focusing mechanism of an aerospace mission was measured. This measurement with ESPI was compared with another interferometric method (Differential Interferometer), whose principal characteristic is its high accuracy, but the measurement is only local. As a final step, the results have been used to provide feedback with the finite element analysis (FEA). Before the composite material measurements, a quality assessment of the technique was carried out measuring the CTE of Aluminum 6061-T6. Both techniques were compared with the datasheet delivered by the supplier. A review of the basic concepts was done, especially with regards to ESPI, and the considerations to predict the quality in the fringes formation were explained. Also, a review of the basic concepts for the mechanical calculation in composite materials was done. The CTE of therncomposite material found was 4.69X10～(-6) ±3X10～(-6) K～(-1) . The most important advantage between ESPI and differential interferometry is that ESPI provides more information due to its intrinsic extended area, surface deformation reconstruction, in comparison with the strictly local measurement of differential interferometry
机译：在平面布置中使用电子散斑图案干涉术（ESPI）技术，测量了将在航空航天任务的被动聚焦机构中使用的复合材料的热膨胀系数（CTE）。用ESPI进行的这种测量与另一种干涉测量方法（差分干涉仪）进行了比较，该方法的主要特点是精度高，但是测量仅是局部的。作为最后一步，结果已用于通过有限元分析（FEA）提供反馈。在进行复合材料测量之前，要对技术进行质量评估，以测量铝6061-T6的CTE。将这两种技术与供应商提供的数据表进行了比较。回顾了基本概念，特别是关于ESPI的基本概念，并解释了预测条纹形成质量的注意事项。此外，对复合材料中机械计算的基本概念进行了回顾。测得的复合材料的CTE为4.69X10〜（-6）±3X10〜（-6）K〜（-1）。 ESPI和差分干涉测量法之间最重要的优势在于，与严格局部测量差分干涉测量法相比，ESPI由于其固有的扩展区域，表面变形重构而提供了更多信息

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