风洞试验中的视频测量技术现状与应用综述

发布时间：2018-03-26 01:13

  本文选题：视频测量　切入点：模型变形　出处：《空气动力学学报》2016年01期

【摘要】：视频测量(Videogrammetric Measurement,VM)技术因其对试验模型的设计制造无要求,受到国内外风洞试验机构的青睐,本文综述了国外航空航天强国的风洞试验机构所掌握的VM技术,并分析了VM技术在我国高速暂冲风洞试验中应用所面临的问题,据此中国空气动力研究与发展中心(CARDC)提出了多相机动态标定与基于运动估计的序列图像匹配技术,在暂冲高速风洞高噪声(130dB左右)振动环境下,建立了高精度的模型位姿光学测量技术,2米量级高速风洞中的多个应用表明:视频测量的精度高,已用于高速试验模型的姿态与变形测量;另一方面,通过VM测量偏折位移场得到光束从摄影中心出发穿过扰流区的光程差,为气动光学效应的研究与测量以及试验模型的壁面流动显示提供新的途径,其光路简单、无需使用价格昂贵的相干光源,因此具有巨大应用前景。
[Abstract]:Videogrammetric Measurement (VMM) technology is favored by wind tunnel test organizations at home and abroad because it has no requirement for the design and manufacture of test models. This paper summarizes the VM technology grasped by wind tunnel test organizations in foreign countries. The problems in the application of VM technology in high-speed temporary impulse wind tunnel test in China are analyzed. Based on this, the dynamic calibration of multi-camera and the sequence image matching technology based on motion estimation are proposed by China Aerodynamics Research and Development Center (CARDC). In the vibration environment of temporary impulse high-speed wind tunnel with high noise and about 130dB), a high precision model position and attitude optical measurement technology is established. Many applications in 2 meters high speed wind tunnel show that the accuracy of video measurement is high. It has been used to measure the attitude and deformation of the high speed test model. On the other hand, the deflection displacement field is measured by VM to obtain the optical path difference of the beam passing through the spoiler area from the camera center. It provides a new way for the study and measurement of aero-optical effect and the display of wall flow in the experimental model. The optical path is simple and there is no need to use expensive coherent light source, so it has a great application prospect.
【作者单位】： 中国空气动力研究与发展中心;
【基金】：国家自然科学基金(风洞动态试验对象姿态的视频测量及其运动规律建模,51475453;时变正交光偏折投影场定量视频测量及其三维重建,11472297)
【分类号】：V211.74
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本文编号：1665679