远程多点三维实时运动测量仪
Long-range multi-point three-dimensional real-time motion measuring instrument
Received:March 01, 2021  Revised:April 05, 2021
DOI:10.7520/1001-4888-21-039
中文关键词:  三维视觉测量  数字图像相关  外参标定  相机同步  运动测量
英文关键词:three-dimensional visual measurement  digital image correlation  external parameter calibration  camera synchronization  motion measurement
基金项目:国家重点研发计划(编号:2018YFF01014200);国家自然科学基金(编号:12002197,12072184,11727804);中国博士后科学基金第67批面上资助(编号:2020M671070);上海市“超级博士后”资助计划(编号:2019192)资助
Author NameAffiliation
HUANG Cheng School of Mechanics and Engineering, Shanghai University, Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Energy Engineering Mechanics, Shanghai 200444, China 
GUAN Banglei Hunan Provincial Key Laboratory of Image Measurement and Visual Navigation, College of Aerospace Science, National University of Defense Technology, Changsha 410073, Hunan, China 
SU Zhilong* School of Mechanics and Engineering, Shanghai University, Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Energy Engineering Mechanics, Shanghai 200444, China 
ZHANG Dongsheng School of Mechanics and Engineering, Shanghai University, Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Energy Engineering Mechanics, Shanghai 200444, China 
YU Qifeng Hunan Provincial Key Laboratory of Image Measurement and Visual Navigation, College of Aerospace Science, National University of Defense Technology, Changsha 410073, Hunan, China 
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中文摘要:
      基于图像和视觉的非接触运动跟踪是目前光测力学中一个活跃的研究领域,在科研和工程测量方面都得到了广泛的应用。本文基于立体视觉原理介绍了一种远程多点三维实时运动测量仪,该系统由2个可独立工作的测量站构成,每个站具备完整的高速图像采集、距离测量、姿态感知、运动控制和数据处理功能。为了实现远程测量,站点之间通过网线或者无线传输的方式进行通讯和数据交互,形成“主站+辅站”的协作测量模式。在三维计算上,利用场景特征实现双站相机的自动标定,并基于高效的数字图像相关原理进行立体匹配和时序跟踪,实现了多点三维运动的实时测量。通过室内刚体平移实验评估了该测量系统的精度;对实际风电叶片运动轨迹的测量,证明了该测量系统在远程大视场测量中的可行性。
英文摘要:
      Non-contact motion tracking based on image and vision is currently an active research field in photomechanics, and it has been widely used in scientific research and engineering measurement. This paper introduces a long-range multi-point 3D real-time motion measuring instrument based on the principle of stereo vision. The system is composed of two independently working stations. Each station has complete high-speed image acquisition, distance measurement, attitude perception, motion control and data processing function. To realize remote measurement, the stations communicate and exchange data through network cables or wireless transmission to form a cooperative measurement mode of “main station + secondary station”. In the three-dimensional calculation, the automatic calibration of the dual-station camera is realized by using scene features, and the stereo matching and temporal tracking are performed based on the efficient digital image correlation principles, realizing the real-time measurement of multi-point three-dimensional motion. The accuracy of the measurement system is verified by the indoor rigid body translation experiment; the feasibility of the measurement device in the long-distance large field of view measurement is proved through the measurement of the actual wind turbine blade movement trajectory.
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