Jia Zhenyuan, Ma Xin, Liu Wei, Lu Wenbo, Li Xiao, Chen Ling, Wang Zhengqu, Cui Xiaochun
Key Laboratory for Precision and Non-Traditional Machining Technology of the Ministry of Education, Dalian University of Technology, Dalian 116024, China.
AVIC Aerodynamics Research Institute, Shenyang 116024, China.
Sensors (Basel). 2014 Dec 12;14(12):23933-53. doi: 10.3390/s141223933.
High-precision wind tunnel simulation tests play an important role in aircraft design and manufacture. In this study, a high-speed pose vision measurement method is proposed for high-speed and rolling targets in a supersonic wind tunnel. To obtain images with high signal-to-noise ratio and avoid impacts on the aerodynamic shape of the rolling targets, a high-speed image acquisition method based on ultrathin retro-reflection markers is presented. Since markers are small-sized and some of them may be lost when the target is rolling, a novel markers layout with which markers are distributed evenly on the surface is proposed based on a spatial coding method to achieve highly accurate pose information. Additionally, a pose acquisition is carried out according to the mentioned markers layout after removing mismatching points by Case Deletion Diagnostics. Finally, experiments on measuring the pose parameters of high-speed targets in the laboratory and in a supersonic wind tunnel are conducted to verify the feasibility and effectiveness of the proposed method. Experimental results indicate that the position measurement precision is less than 0.16 mm, the pitching and yaw angle precision less than 0.132° and the roll angle precision 0.712°.
高精度风洞模拟试验在飞机设计与制造中发挥着重要作用。本研究针对超音速风洞中高速滚动目标，提出了一种高速姿态视觉测量方法。为获取高信噪比图像并避免对滚动目标气动外形的影响，提出了一种基于超薄逆反射标记的高速图像采集方法。由于标记尺寸小，且目标滚动时部分标记可能丢失，基于空间编码方法提出了一种新的标记布局，使标记在表面均匀分布，以获得高精度姿态信息。此外，通过案例删除诊断去除不匹配点后，根据上述标记布局进行姿态采集。最后，在实验室和超音速风洞中进行了测量高速目标姿态参数的实验，以验证所提方法的可行性和有效性。实验结果表明，位置测量精度小于0.16mm，俯仰角和偏航角精度小于0.132°，滚转角精度为0.712°。
