基于三维扫描技术的结冰风洞冰形非接触测量研究
作者:郭龙1,2, 马军2, 李明1,2, 倪章松2 作者单位: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 飞行器结冰与防除冰重点实验室, 四川 绵阳 621000 发布时间:2018-09-27 15:48:15 点击数:127

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关键词:双目测量;结构光;结冰风洞;结冰外形;显影剂
摘要:

在结冰风洞中进行冰形测量,传统的接触方法测量精度低、对冰形有损坏,且只能获得二维的冰形迹线。采用双目视觉测量与结构光方法相结合的三维扫描技术,利用两个CCD相机和一个光栅投射器,辅助旋转平台和计算机,构成一个三维非接触扫描系统。通过解决冰的透光性以及结冰风洞低温高湿的环境影响,设计加热保温装置,并探索多种显影剂及播撒方法,实现对透明光冰的非接触测量。实验结果表明:采用三维扫描系统测量冰形的精度可达到0.1 mm,可以满足小尺度模型结冰外形的三维非接触测量,可在实验研究或工程实践中使用。

Non-contact measurement of ice shape in icing wind tunnel based on 3D scanning technology

GUO Long1,2, MA Jun2, LI Ming1,2, NI Zhangsong2

1. State Key Laboratory of Aerodynamics, China Aerodynamics Research and Development Center, Mianyang 621000, China;
2. Key Laboratory of Icing and Anti/De-icing of Aircraft, China Aerodynamics Research and Development Center, Mianyang 621000, China

Abstract: Because of the shortcoming of the traditional contact measurement of ice shape in icing wind tunnel, such as low accuracy, damage to the ice shape and only obtaining 2D ice shape trajectory. A 3D scanning technology was developed by combining binocular vision measurement and structured light method, which includes two CCD cameras, a grating projector, an auxiliary rotating platform and a computer, forming a 3D non-contact scanning system. Ice transparence and environment influence of icing wind tunnel with low temperature and high humidity were considered, and an attemperator was designed and many types of developers and seeding methods were researched to achieve non-contact measurement for light ice with transparent characteristics. The test results indicate that ice shape measuring precision based on 3D scanning system was 0.1mm, which meets 3D non-contact measurement demands for small-size model icing shape and it can be used during experimental study or engineering practice.

Keywords: binocular measurement;structured light;icing wind tunnel;ice shape;developer

2018, 44(9): 18-22  收稿日期: 2018-01-09;收到修改稿日期: 2018-02-05

基金项目: 国家973计划项目(2015CB755800)

作者简介: 郭龙(1980-),男,陕西淳化县人,高级工程师,研究方向为飞行器结冰试验技术

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