基于双目立体视觉的直升机旋翼桨叶位移变形测量方法  

Displacement and deformation measurements of helicopter rotor blades based on binocular stereo vision

作　　者：左承林 马军[1,2] 岳廷瑞[2] 宋晋[2] 王勋年[1] ZUO Chenglin;MA Jun;YUE Tingrui;SONG Jin;WANG Xunnian(State Key Laboratory of Aerodynamics,China Aerodynamics Research and Development Center,Mianyang Sichuan 621000,China;Low Speed Aerodynamics Institute of China Aerodynamics Research and Development Center,Mianyang Sichuan 621000,China)

机构地区：[1]中国空气动力研究与发展中心空气动力学国家重点实验室,四川绵阳621000 [2]中国空气动力研究与发展中心低速空气动力研究所,四川绵阳621000

出　　处：《实验流体力学》2020年第1期87-95,共9页Journal of Experiments in Fluid Mechanics

基　　金：空气动力学国家重点实验室研究基金(SKLA2017-2-1)。

摘　　要：为实现直升机旋翼桨叶位移变形的非接触测量,提出了基于双目立体视觉的三维测量方法。采用编码标记方式,在旋翼桨叶表面粘贴具有唯一编码信息的标记点,以高频激光器提供纳秒级瞬态照明,同步触发高速CCD相机采集桨叶瞬态图像,基于双目立体视觉原理计算标记点的三维坐标,进而计算得到旋翼桨叶的位移变形参数。试验结果表明:该测量方法的测量精度小于0.1mm,测量准度小于0.3mm,可满足直升机旋翼桨叶位移变形的高精度测量需求。To realize the displacement and deformation measurements of helicopter rotor blades in a non-contact way,the binocular stereo vision based three-dimensional measurement method is presented.First,coded targets with unique identifying information are pasted on the rotor blades.Then,with nanosecond illumination provided by the high-frequency laser,highspeed CCD cameras are triggered synchronously to acquire the transient images of rotor blades.Finally,based on the binocular stereo principle,three-dimensional coordinates of coded targets are obtained,which are used to calculate the displacement and deformation parameters of rotor blades further.The test results show that the accuracy of our proposed method is better than 0.3 mm,which is capable of meeting the high precision displacement and deformation measurement requirements of helicopter rotor blades.

关 键 词：直升机旋翼 位移变形 非接触测量 双目立体视觉 编码标记 

分 类 号：V211.71[航空宇航科学与技术—航空宇航推进理论与工程]