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Opportunities for the Use of Electronic Distance Measurement Instruments in Nondestructive Testing and Structural Health Monitoring and Implications for ASNT

机译：使用电子距离测量仪器在非破坏性测试中使用电子距离测量仪器的机会，以及无ASNT的结构健康监测和影响

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The state-of-the-art for commercially available electronic distance measurement instruments (EDM), commonly known as laser trackers, advanced by quantum leaps in 2004 and 2010. It is now practical to measure 3-D coordinates of targets attached to cardinal points on large-scale structures with an absolute accuracy (traceable to NIST) of the order of one part-per-million, and relative dynamic movements, such as vibrations, typically 10 times better. For example, absolute 3-D coordinates of a structure within a 100 meter cube can be measured within a volume of a 0.1 mm cube (the thickness of a sheet of standard printer paper), and vibrations within a 0.01 mm cube. While this technology has been widely exploited in the manufacturing and aerospace industries, a literature search confirms that it has not yet been generally adopted by the nondestructive testing (NDT) industry. However, due to the unprecedented measurement accuracy, this technology presents opportunities for new methods for NDT. For example, instead of looking for defects as indicators of reduced performance of a structure, one could simply measure the performance of the structure under various loading conditions, and compare the measured performance to finite element models (FEM), or look for salient characteristics such as; linearity, hysteresis, creep, symmetry, damping coefficient, and the like. Moreover, the measurements can be repeated over the life of the structure in a trend analysis. The manufacturing and aerospace industries have adopted the technology from a quality control perspective, i.e., comparing the measured coordinates to the drawings-not from a failure mode perspective. The experience resources of the ASNT Membership are needed to adopt these new methods to NDT.
机译：用于市售电子距离测量仪器（EDM）的最先进，通常称为激光跟踪器，2004年和2010年通过量子跳跃提出。现在可以实际测量附着在红衣主教的目标3-D坐标在具有绝对精度（可追溯至NIST）的大规模结构上，每百万百万级，以及相对动态运动，如振动，通常更好10倍。例如，100米立方体内的结构的绝对3-D坐标可以在0.1mm立方体（标准打印机纸的厚度）的体积内测量，以及0.01mm立方厘米的振动。虽然这项技术已被广泛利用在制造和航空航天行业中，但文献搜索证实，无损检测（NDT）行业尚未采用。然而，由于前所未有的测量准确性，该技术为NDT提供了新方法的机会。例如，不是寻找缺陷作为结构的降低性能，可以简单地测量各种装载条件下结构的性能，并将测量的性能与有限元模型（FEM）进行比较，或者寻找突出特性作为;线性，滞后，蠕变，对称性，阻尼系数等。此外，在趋势分析中可以在结构的寿命中重复测量。制造业和航空航天行业从质量控制视角采用了该技术，即，将测量的坐标与图纸进行比较 - 从故障模式的角度来看。需要ASNT成员资源的经验资源，以采用这些新方法到NDT。

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