LIU Jian-wei, JIANG Zhi-qiang, LIU Yuan-peng, WEN Zhen-hua, LIANG Jin. Measurement on structural deformation of load-bearing power transmission tower based on 3D optical method[J]. Editorial Office of Optics and Precision Engineering, 2012,20(5): 942-948
LIU Jian-wei, JIANG Zhi-qiang, LIU Yuan-peng, WEN Zhen-hua, LIANG Jin. Measurement on structural deformation of load-bearing power transmission tower based on 3D optical method[J]. Editorial Office of Optics and Precision Engineering, 2012,20(5): 942-948 DOI: 10.3788/OPE.20122005.0942.
Measurement on structural deformation of load-bearing power transmission tower based on 3D optical method
The actual load-bearing capacities of Power Transmission Towers(PTTs) should be estimated by a real-scale model experiment due to their complex structures
therefore an optical full-field 3D deformation measurement method is proposed to overcome the difficulties of large-scale
large-displacement
3D deformation
rapid multi-point measurement in PTT real-scale model experiments. Based on close-range photogrammetry technology
this method utilizes specialized markers as measured targets to reconstruct the 3D coordinates of those pre-pasted artificial targets through analyzing the captured photo-set in each epoch
then it conducts the coordinate system global registration according to un-movable targets. By tracking and comparing the 3D coordinates of the deformable targets between different epoches
the 3D load-deformation diagram of the PPT stucture is obtained. Acceptance experiment results indicate that the accuracy of this method could reach about 0.1 mm/4 m and real-scale model experiments show the proposed method could meet accuracy and efficiency requirements of PPT load-deformation measurement. Comparing with traditional deformation sensors
the proposed method can satisfy measuring requirements of non-contact(non-interfere)
on-spot
high precision
rapid speed
strong anti-jamming and stabilization.
关键词
Keywords
references
赵滇生. 输电塔架结构的理论分析与受力性能研究 . 杭州: 浙江大学 ,2003. ZHAO S S. The Theoretical Analysis and Study of Machanical Behaviour for Transmission Tower . Hangzhou: Zhejiang University, 2003. (in Chinese)[2] MOON B W, PARK J H, LEE S K, et al.. Performance evaluation of a transmission tower by substructure test[J]. Journal of Constructional Steel Research, 2009,6(5):1-11.[3] FRASER C S. Monitoring the thermal deformation of steel beams via vision metrology[J]. ISPRS Journal of Photogrammetry & Remote Sensing, 2000,55(4):268-276.[4] JIANG R, JAUREGUI D V. A novel network control method for photogrammetric bridge measurement[J]. Experimental Techniques, 2007,5(6):48-53.[5] 徐芳, 于承新, 黄桂兰,等. 利用数字摄影测量进行钢结构挠度的变形监测 [J].武汉大学学报(信息科学版),2001,26(3):256-260. XU F, YU CH X, HUANG G L, et al.. The monitor of steel structure bend deformation based on digital photogrammetry[J]. Editoral Board of Geomatics and Information Science of Wuhan University, 2001,26(3):256-260. (in Chinese)[6] 余永生. 一种典型工程结构风致振动现场测量 [J]. 实验流体力学, 2006,20(4):73-76. YU Y SH, BI W T, LIANG B. Field measurements of wind-induced vibration of a structure[J]. Journal of Experiments in Fluid Mechanics, 2006,20(4):73-76. (in Chinese)[7] JIANG R, JAUREGUI D V, WHITE K R. Close-range photogrammetry applications in bridge measurement: literature review[J]. Measurement, 2008, 41(8): 823-834.[8] CHANG C, JI Y. Flexible videogrammetric technique for three-dimensional structural vibration measurement[J]. Journal of Engineering Mechanics, 2007, 133: 656-664.[9] 刘建伟,梁晋,梁新合,等. 大尺寸工业视觉测量系统 [J].光学 精密工程,2010,18(1):126-134. LIU J W, LIANG J, LIANG X H, et al.. Industrial vision measuring system for large dimension work-pieces[J]. Opt. Precision Eng., 2010,18(1):126-134. (in Chinese).[10] 韩建栋,吕乃光,王锋,等. 采用光学定位跟踪技术的三维数据拼接方法 [J].光学 精密工程,2009,17(1):45-51. HAN J D, LV N G, WANG F, et al.. 3D data registration method based on optical location tracking technology[J]. Opt. Precision Eng., 2009,17(1):45-51. (in Chinese).[11] 陈刚,姚英学. 多视点大空间三维坐标数据归一化方法 [J].光学 精密工程,2008,16(7):1309-1314. CHEN G, YAO Y X. 3D datum mosaic method of multi-view and large scale based on optical coding[J]. Opt. Precision Eng., 2008,16(7):1309-1314. (in Chinese) .[12] SANT Y L, MIGNOSI A, DELEGLISE B. Model deformation measurement (MDM) at onera . 25th AIAA Applied Aerodynamics Conference, Miami, FL, 2007:1-8.[13] LICHTI D D, GUMULYA M M, HORSLEY R R. Determination of trajectories of metallic spheres settling in non-newtonian fluids[J]. The Photogrammetric Record, 2009, 24(125): 37-50.