基于双目视觉的可变后掠角机翼角度测量技术  

Variable swept wing angle measurement technology based on binocular stereo vision

作　　者：王馨悦 徐志伟[1] Wang Xinyue;Xu Zhiwei(College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210000,China)

机构地区：[1]南京航空航天大学航空学院,南京210000

出　　处：《国外电子测量技术》2022年第11期114-119,共6页Foreign Electronic Measurement Technology

摘　　要：针对可变后掠角机翼模型,设计了双目立体视觉测量系统,实现对可变后掠角机翼偏转角的无接触测量。该系统采用基于现场可编程逻辑门阵列(FPGA)的双摄像头视觉采集系统,获取机翼上表面的方形标志作为检测对象,提取图像中的边界和特征点信息,利用空间圆拟合的方法对数据点进行拟合,从而获得可变后掠角机翼的偏转角度。对比了角点检测与边界提取检测两种方法,结果显示,采用边界检测方法能有效降低随机误差的干扰,所得测量角度相对误差低于3.5%,验证了该测试系统的可行性和准确性。Aiming at the variable sweep wing model, a binocular stereo vision measurement system is designed in this paper to realize the non-contact measurement of the deflection angle of the variable swept wing.The system adopts a dual camera visual acquisition system based on field programmable logic gate array(FPGA), obtains the square mark on the upper surface of the wing as the detection object, extracts the boundary and feature point information in the image, and uses the spatial circle fitting method to fit the data points, so as to obtain the deflection angle of the variable swept wing. This paper compares two methods of corner detection and boundary extraction detection. The results show that the boundary detection method can effectively reduce the interference of random errors, and the relative error of the measured angle is less than 3.5%, which verifies the feasibility and accuracy of the test system.

关 键 词：双目立体视觉 变体机翼 可变后掠角机翼 嵌入式(FPGA)测试系统 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] V247.5[自动化与计算机技术—计算机科学与技术]