火箭推进2025，Vol.51Issue(2)：115-124,10.DOI:10.3969/j.issn.1672-9374.2025.02.012
贮箱液面三维形态的双目视觉测量方法
Binocular vision-based method for three-dimensional liquid surface topography measurement of propellant tank
摘要
Abstract
During the ground test,the accurate three-dimensional liquid surface topography measurement of propellant tanks can provide a more detailed sloshing characterization,which is important for the study of sloshing dynamics and the optimal design of tanks.However,there is still a lack of effective high-spatial-resolution measurement techniques.A binocular vision-based method for three-dimensional liquid surface topography measurement of propellant tanks was proposed.The random speckle projection was adopted for the rapid attachment of feature information.Considering the sparseness and inhomogeneity of the distribution of feature points on the liquid surface in binocular view,a sparse-to-dense strategy was employed,and a high-spatial-resolution stereo matching algorithm was developed by integrating the artificial neural network with the SIFT feature algorithm to generate a dense and uniform set of measurement points.The three-dimensional coordinates of the measurement points were determined through the binocular vision imaging model,thereby facilitating the three-dimensional reconstruction of the liquid surface topography.The static topography measurement experiments were carried out at various liquid levels.The average off-plane error of the proposed method was no greater than 2.3 mm,with the maximum off-plane error no greater than 3.0 mm.The dynamic topography measurement experiments were conducted under harmonic excitation,and the measurement results of the proposed method demonstrated high consistency with the mode shape calculated by the finite element method.The relative error between the measured main sloshing frequency and the actual excitation frequency was 1.96%.The findings indicate that the proposed method can achieve high-spatial-resolution three-dimensional liquid surface topography measurement of propellant tanks with high accuracy,and can effectively capture the dynamic behavior of the liquid surface of propellant tanks.关键词
推进剂贮箱/液面形态测量/双目视觉/人工神经网络/立体匹配/三维重建Key words
propellant tank/liquid surface topography measurement/binocular vision/artificial neural network/stereo matching/three-dimensional reconstruction分类
航空航天引用本文复制引用
张一鸣,郝方楠,徐自力,张钰豪,张轩..贮箱液面三维形态的双目视觉测量方法[J].火箭推进,2025,51(2):115-124,10.基金项目
装备重大基础研究项目群(514010106-302) （514010106-302）
