基于简化特征匹配的双目视觉测量系统及其参数计算  

Implementation of Binocular Vision Measurement System Based on Simplified Feature Matching Method

作　　者：陈蓓[1] 曹文伦 CHEN Bei;CAO Wen-lun(School of Automation,Northwestern Polytechnical University,Xi’an,Shaanxi 710129,China;School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an,Shaanxi 710072,China)

机构地区：[1]西北工业大学自动化学院,陕西西安710129 [2]西北工业大学航海学院,陕西西安710072

出　　处：《计算技术与自动化》2022年第2期1-6,共6页Computing Technology and Automation

基　　金：国家自然科学基金资助项目(51377314)。

摘　　要：为了解决高温风洞内部高精度非接触测量的难题,完成了观察窗透视双目视觉测量系统。该系统基于主动投射移动线激光和超高速同步相机,以简化左右图像特征匹配的复杂度。介绍了提取线激光光条中心的改进的灰度重心法,还讨论了相机和镜头的选型策略以及参数计算。实验表明,该系统最快可以Is完成一个扫描幅面,在1300〜1500 mm处,待测幅面为300 mmX 300 mm时的最大测量标准偏差为0.11 mm。应用显示,该系统可以保证高温风洞内待测物的实时连续测量和后续动态分析、演示。In order to solve the problem of high-precision non-contact measurement inside the high-temperature wind tunnel,a binocular vision measurement system through the observation window was completed.The system is based on active projection of moving line lasers and ultra-high-speed synchronous cameras to simplify the complexity of matching left and right image features.Moreover,This paper introduces the improved gray centroid method for extracting the center of the line laser light strip,and discusses the selection strategy of the camera and lens and the calculation of the parameters in detail.Experiments show that the system can complete a target scan plane in one second at the fastest.At the distance of 1300〜1500 mm,the standard deviation is less than 0.11mm for the target size of 300 mm X 300 mm.Engineering applications show that the system can ensure real-time continuous measurement under test in the high-temperature wind tunnel and subsequent dynamic analysis and demonstration.

关 键 词：风洞测量 双目视觉 三维重建 非接触测量 

分 类 号：TM930.9[电气工程—电力电子与电力传动]