基于傅里叶变换轮廓术的动态液膜测量  

Dynamic liquid film measurement with Fourier transform profilometry

作　　者：管文洁 吴庆尉 公超 吴迎春[1] 吴学成[1] GUAN Wenjie;WU Qingwei;GONG Chao;WU Yingchun;WU Xuecheng(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《应用光学》2020年第2期366-374,共9页Journal of Applied Optics

基　　金：国家自然科学基金(51576177)。

摘　　要：动态液膜三维形貌的高速测量及重建,对于能源动力领域的工业过程优化十分重要。基于傅里叶变换轮廓术,对缓变表面和非缓变表面分别进行了模拟仿真,研究了物体表面形貌重建精度的影响因素,包括物体表面高度变化率、环境随机噪声以及条纹频率。并根据模拟结果对实验参数进行了优化,研发构建了高速三维结构光测量系统,对竖直壁面下降液膜表面形貌进行了动态测量。实验结果表明:随着液膜沿竖直壁面向下流动,液膜厚度呈现先增大后减小的趋势,高度方向的平均误差为0.1 mm,傅里叶变换轮廓术能够精确地应用于动态液膜高速测量。The high-speed measurement and reconstruction of dynamic liquid film 3 D morphology is very important for the industrial process optimization in energy and power fields.Based on the Fourier transform profilometry,the simulation was performed for both slow and fast varying surfaces.The influencing factors of reconstructive accuracy on object surface morphology such as surface height change rate,environment random noise and fringe frequency were studied.And according to the simulation results,the optimal system parameters were obtained,high-speed 3 D structured light measurement system was established and the surface morphology of dynamic liquid film was measured.The experimental results show that,as the liquid film flows downward along the vertical wall surface,the liquid film thickness first increases and then decreases,and the average error of the height direction is 0.1 mm.This work demonstrates that Fourier transform profilometry can be well applied in the high-speed measurement of dynamic liquid film.

关 键 词：应用光学 动态液膜测量 结构光测量 傅里叶变换轮廓术 高度变化率 条纹频率 

分 类 号：TB96[机械工程—光学工程]