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首页> 外文会议>Conference on Two-and Three-Dimensional Vision Systems for Inspection, Control, and Metrology; Oct 29-30, 2003; Providence, Rhode Island, USA >Full-field dynamic displacement and strain measurement using pulsed and high-speed 3D image correlation photogrammetry
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Full-field dynamic displacement and strain measurement using pulsed and high-speed 3D image correlation photogrammetry

机译：使用脉冲和高速3D图像相关摄影测量法进行全场动态位移和应变测量

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摘要

3D image correlation is a robust method for measuring full-field displacements and strains using a calibrated pair of video cameras. Underlying principles and benefits are reviewed, and the method is compared to 3D ESPI, moire and 2D image correlation. Several applications combining image correlation photogrammetry with stroboscopic illumination and/or high-speed video cameras are presented. Operational strains in ionic polymeric muscle samples and electro-restrictive actuators are determined. The use of short-duration white light pulses to study automobile tires on road wheels at speeds up to 150 miles per hour is demonstrated. Initial work measuring strains on an 18" flywheel in a spin pit at up to 35,000 rpm is described. A notched rubber dogbone sample is pulled to failure at 125% strain in 38 milliseconds, and hundreds of full-field strain maps are captured. This paper includes discussion of sample preparation methods and special lighting systems, including pulsed arc lamps and pulsed lasers. A matrix of capability using available high-speed cameras is included.
机译：3D图像相关性是使用校准的一对摄像机测量全场位移和应变的可靠方法。回顾了基本原理和优点，并将该方法与3D ESPI，莫尔条纹和2D图像相关性进行了比较。提出了将图像相关摄影测量与频闪照明和/或高速摄像机相结合的几种应用。确定离子聚合物肌肉样品和电致伸缩执行器中的操作应变。演示了使用短时白光脉冲以高达每小时150英里的速度研究车轮上的汽车轮胎。描述了在旋转坑中以高达35,000 rpm的速度测量18“飞轮上的应变的初始工作。在38毫秒内，将有缺口的橡胶狗骨样品以125％的应变拉至失效，并捕获了数百个全场应变图。论文讨论了样品制备方法和特殊照明系统，包括脉冲弧光灯和脉冲激光，还包括使用高速相机提供的功能矩阵。

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