Fatigue Crack Length Real Time Measurement Method Based on Camera Automatically Tracking and Positioning

机译：基于摄像头自动跟踪定位的疲劳裂纹长度实时测量方法

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Fatigue crack propagation test is a very important testing way to study the metallic engineering material fatigue fracture characteristics by on-line measuring crack length under the cyclically varying loads. Crack length has been obtained through crack image capture, image processing and image analysis. In order to improve the crack measurement precision when the fatigue crack keeps growing, a new crack length real time measurement method based on the image processing and camera automatically tracking techniques was presented in this paper. This method includes the crack image processing algorithms and camera tracking and positioning movement control. The crack length measurement errors based on the camera tracking and fixed camera are respectively 0.076mm and 0.148mm. The experiment results show the proposed method has greatly improved the crack length measuring precision with the ordinary optical device.

机译：疲劳裂纹扩展测试是通过在线测量周期性变化载荷下的裂纹长度来研究金属工程材料疲劳断裂特性的一种非常重要的测试方法。裂纹长度是通过裂纹图像捕获，图像处理和图像分析获得的。为了提高疲劳裂纹不断扩展时的裂纹测量精度，提出了一种基于图像处理和相机自动跟踪技术的裂纹长度实时测量新方法。该方法包括裂纹图像处理算法以及相机跟踪和定位运动控制。基于摄像机跟踪和固定摄像机的裂纹长度测量误差分别为0.076mm和0.148mm。实验结果表明，该方法大大提高了普通光学器件的裂纹长度测量精度。

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《International conference on mechanical and electronics engineering》|2011年|3111-3118|共8页
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Hongli GAO; Shanshan SHEN; Yan YUN;
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中图分类 TH15;
关键词
Fatigue crack; On-line Measurement; Image processing; Camera automatically tracking;

机译：疲劳裂纹;在线测量;图像处理;相机自动跟踪;

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专利

1. Automated real-time measurements of fatigue crack length and crack opening load using unloading elastic compliance method [J] . Chung-Seog Oh, Youn-Young Earmme, Ji-Ho Song International Journal of Fatigue . 1997,第2期

机译：使用卸载弹性柔度法自动实时测量疲劳裂纹长度和裂纹开裂载荷
2. Automatically controlled pan-tilt smart camera with FPGA based image analysis system dedicated to real-time tracking of a moving object [J] . Zawadzki Artur, Gorgon Marek Journal of systems architecture . 2015,第10期

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3. A passive, camera-based head-tracking system for real-time, three-dimensional estimation of head position and orientation in rodents [J] . Vanzella Walter, Grion Natalia, Bertolini Daniele, Journal of Neurophysiology . 2019,第6期

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4. Fatigue Crack Length Real Time Measurement Method Based on Camera Automatically Tracking and Positioning [C] . Hongli GAO, Shanshan SHEN, Yan YUN International conference on mechanical and electronics engineering . 2011

机译：基于摄像机的疲劳裂缝长度实时测量方法自动跟踪和定位
5. Real-time three-dimensional head position tracker system with stereo cameras using a face recognition neural network. [D] . Girado, Javier Ignacio. 2004

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8. Real Time Eye Tracking and Hand Tracking Using Regular Video Cameras for Human Computer Interaction [R] . Yin, L. 2011

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Fatigue Crack Length Real Time Measurement Method Based on Camera Automatically Tracking and Positioning

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