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Two-dimensional optical coherence tomography for real-time structural dynamical characterization |
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| Institution: | 1. Laboratory of Optics, Terahertz and Non-destructive Testing, School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, PR China;2. Fujian Key Laboratory of Medical Instrument and Pharmaceutical Technology, Fuzhou 350108, PR China;1. Department of Physics, Faculty of Science, University of Damietta, New Damietta, Egypt;2. BIAS (Bremer Institut für Angewandte Strahltechnik), Bremen, Germany;1. School of Electro-Mechanical Engineering, Xidian University, Xi’an 710071, Shaanxi, PR China;2. State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, PR China |
| Abstract: | We present a two-dimensional optical coherence vibration tomography (2DOCVT) system with an ultra-precision displacement resolution of ~0.1 nm that is capable of in site real-time absolute displacement measurement of structural line vibrations. Experimental results of sinusoidal, sweep and impulse vibrations were reported. The key figures of merit such as the 2DOCVT system could obtain fast line vibration measurement without scanning and it also could be used to capture structural modal parameters in one single impulse excitation measurement without any vibration excitation input information, making it attractive for the application in low-frequency vibration measurement and response-only modal analysis. |
| Keywords: | Two-dimensional optical coherence tomography Absolute displacement measurement Response-only modal analysis |
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