Two-dimensional Fourier-domain optical coherence vibration tomography for structural modal analysis

被引：0
|
作者：
Fang B. [1 ]
Zhong S.-C. [1 ,2 ]
Lin J.-W. [1 ]
Chen W.-Q. [1 ]
Zhong J.-F. [1 ]
Zhang Q.-K. [3 ]
机构：
[1] Laboratory of Optics, Terahertz and Non-destructive Testing, School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou
[2] School of Mechatronics Engineering and Automation, Shanghai University, Shanghai
[3] School of Physics and Information Engineering, Fuzhou University, Fuzhou
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2020年 / 33卷 / 02期
关键词：
Line field vibration measurement; Modal analysis; Spectrum correction; Two-dimensional Fourier domain optical coherence vibration tomography system;
D O I：
10.16385/j.cnki.issn.1004-4523.2020.02.016
中图分类号：
学科分类号：
摘要：
Based on low-coherence light interference principle, a two-dimensional Fourier domain optical coherence vibration tomography (2D-OCVT) system is developed, in which a high speed CMOS camera is employed as the detector. By analyzing the interference signal caused by the interference of reflected light from vibration structure surface and the reference light, the displacement of the vibrating structure can be obtained. Nano-scale ultra-high resolution can be achieved after using discrete spectrum correction method. 2D-OCVT system can be used to measure line field vibrations, that is, multipoint displacement information can be measured simultaneously at one data acquisition. Therefore, it can take advantage of output-only model analysis without knowing the input force information for real-time structural modal analysis. It also does not need to move sensors along the measured structure to get multipoint displacement information. Experimental results show that the 2D-OCVT can precisely measure 0-1000 Hz vibration signal. The system can meet the need of high- and low- frequency measurement, providing a new tool for the engineering structure vibration modal analysis. © 2020, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：356 / 363
页数：7
相关论文
共 23 条
  • [1] Zhong J., Zhong S., Zhang Q., Two-dimensional optical coherence tomography for real-time structural dynamical characterization, Opt. Laser Eng., 66, pp. 74-79, (2015)
  • [2] Huang D., Swanson E.A., Lin C.P., Et al., Optical coherence tomography, Science, 245, 5035, pp. 1178-1181, (1991)
  • [3] Guo Y., Yao X., From Michelson interferometer tooptical coherence tomography, College Physics, 26, 1, pp. 1-6, (2007)
  • [4] You T., Zhong S., Zhong J.-F., Et al., Development of two-dimensionaloptical coherence tomography, Journal of Mechanical & Electrical Engineering, 32, 5, pp. 602-606, (2015)
  • [5] Xie M., Ding K., Rectifying technique of spectrum analysis, Journal of Vibration Engineering, 7, 2, pp. 172-179, (1994)
  • [6] Xiong S., Huang C., Mechanical Engineering Test Technology, pp. 193-202, (2013)
  • [7] Shu G., Gao Z., Liu Y., Dynamic Mechanical Vibration and Noise, pp. 139-151, (2008)
  • [8] Lopes H., Ferreira F., Araujo Dos Santos J.V., Et al., Localization of damage with speckle shearography and higherorders patial derivatives, Mech. Syst. Signal Process, 49, 1-2, pp. 24-38, (2014)
  • [9] Hsu C., Sung Y., Lin Z., Et al., Prototype of a compact displacement sensor with a holographic diffraction grating, Opt. Laser Technol., 48, pp. 200-205, (2013)
  • [10] Verrier N., Atlan M., Absolute measurement of small-amplitude vibrations by time-averagedheterodyne holography with a dual local oscillator, Opt. Lett., 38, 5, pp. 739-741, (2013)
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