离面振动光流分析方法研究

Analysis of out-of-plane vibration using optical flow

视觉振动检测方法因大范围、非接触等特点,已得到广泛的研究和应用。研究了结构离面振动视觉检测的基本原理,建立了检测模型。根据光流法运动估计的基本原理及离面振动视觉检测模型,研究了离面振动光流分析方法,提出了两种离面振动的光流检测模型。最后,对悬臂梁进行了视觉振动检测实验,并与有限元仿真进行了对比,结果表明该方法无需图像的特征提取,能够有效地识别结构的振动参数。

Visual vibration measurement has been extensively researched and applied due to its large range and non-contact characteristics.The principle of vibration detection based on the out-of-plane vision under conventional imaging condition was investigated.Models of vibration detection based on the out-of-plane vision were developed. According to these models and the principle of optical flow motion estimation,vibration measurement methods based on the out-of-plane vision using optical flow were discussed.Two basic models of vibration detection based on the out-of-plane vision using optical flow were proposed.The results of visual vibration detection experiments on a cantilever beam were rigorously compared with those of a finite element simulation to verify the efficacy of the proposed methods.It turns out that the proposed methods can effectively identify the vibration parameters of a structure without its image feature extraction.