关键词:离子推力器；栅极热变形；摄像测量学；远距显微镜；亚像素定位；计算机视觉

Journal of Propulsion Technology ›› 2019, Vol. 40 ›› Issue (4): 953-960.

• Electric Propulsion and Other Advanced Propulsion • Previous Articles

关键词:离子推力器；栅极热变形；摄像测量学；远距显微镜；亚像素定位；计算机视觉

College of Aerospace Science and Engineering，National University of Defense Technology，Changsha 410073，China,College of Aerospace Science and Engineering，National University of Defense Technology，Changsha 410073，China,College of Aerospace Science and Engineering，National University of Defense Technology，Changsha 410073，China,National Key Laboratory of Vacuum and Cryogenic Technology on Physics，Lanzhou Institute of Physics， Lanzhou 730030，China and National Key Laboratory of Vacuum and Cryogenic Technology on Physics，Lanzhou Institute of Physics， Lanzhou 730030，China

Published:2021-08-15

离子推力器栅极热变形的摄像测量方法

梁栋¹,袁杰红¹,周仕明¹,孙明明²,李兴坤²

国防科技大学空天科学学院，湖南长沙 410073,国防科技大学空天科学学院，湖南长沙 410073,国防科技大学空天科学学院，湖南长沙 410073,兰州空间物理技术研究所真空低温技术与物理国家级重点实验室，甘肃兰州 730030,兰州空间物理技术研究所真空低温技术与物理国家级重点实验室，甘肃兰州 730030

作者简介:梁栋，硕士生，研究领域为实验固体力学。E-mail: liangdong16@nudt.edu.cn 通讯作者:周仕明，博士，讲师，研究领域为实验固体力学。
基金资助:
真空技术与物理重点实验室开放基金(ZWK1702)。

Abstract

Abstract: In order to solve the technical problem of the detection of the tiny thermal deformation of the grid in vacuum， high temperature and plasma environments， a method for measuring the grid thermal deformation of ion thruster based on videometrics is proposed， and a system for measuring the grid thermal deformation based on a telemicroscope is designed. An interactive zone calibration method is used to detect clear edges with multiple targets. With the use of ceramic probes and circular cooperation logos， sub-pixel level deformation detection， image magnification factor calculation， and tangential distortion correction and horizontal plane correction were completed. Accuracy verification experiments show that the static detection accuracy of this method is 9 microns.The results of grid thermal deformation measurements are consistent with the trend of similar foreign experiments.The system satisfies the needs of the thermal deformation measurement of the grid of the ion thruster.

Key words: Ion thruster；Grid thermal deformation；Videometrics；Telemicroscope；Sub-pixel positioning；Computer vision

摘要： 为了解决离子推力器栅极在真空、高温、等离子体环境中微小热变形量检测的技术难题，提出了一种基于摄像测量原理的离子推力器栅极热变形测量方法，设计了一套基于远距显微镜进行栅极热变形测量的系统。运用交互式分区标定方法获得多目标清晰边缘，借助陶瓷探针及圆形合作标志完成栅极亚像素级变形量检测、图像放大系数计算以及切向畸变校正、水平面校正。精度验证实验表明本方法静态检测精度9μm，栅极热变形实验测量结果与国外同类实验趋势一致，系统满足离子推力器栅极热变形测量的需求。

关键词: 离子推力器；栅极热变形；摄像测量学；远距显微镜；亚像素定位；计算机视觉

LIANG Dong¹,YUAN Jie-hong¹,ZHOU Shi-ming¹,SUN Ming-ming²,LI Xing-kun². 关键词:离子推力器；栅极热变形；摄像测量学；远距显微镜；亚像素定位；计算机视觉[J]. Journal of Propulsion Technology, 2019, 40(4): 953-960.

梁栋,袁杰红,周仕明,孙明明,李兴坤. 离子推力器栅极热变形的摄像测量方法[J]. 推进技术, 2019, 40(4): 953-960.

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关键词:离子推力器；栅极热变形；摄像测量学；远距显微镜；亚像素定位；计算机视觉

离子推力器栅极热变形的摄像测量方法

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