计量学报2024，Vol.45Issue(9)：1324-1330,7.DOI:10.3969/j.issn.1000-1158.2024.09.09
面向粒子图像测速仪的分参数校准方法
Fractional Parameters Calibration for Particle Image Velocimeter
摘要
Abstract
The calibration methods of particle displacement and cross-frame time during particle image velocimetry(PIV)measurement are studied.The geometric size standard of disc is designed for camera calibration,the proportional relationship between the image obtained by camera and the object is determined,and the particle displacement calibration is realized by comparing with the ruler under the same experimental condition.A traceable timer is used to calibrate the time interval of PIV synchronizer pulse signals at different speed points.The cross-frame time correction coefficient is the ratio of the actual value to the initial value.As the result the PIV calibration coefficient is determined by the particle displacement correction coefficient and the cross-frame time correction coefficient.The uncertainty of PIV calibration results based on the sub-parameter method is evaluated.The results indicate that:at the theoretical speed point of 100 m/s,the maximum relative error is 0.08％,and the uncertainty of the relative error is 0.01％.关键词
流量测量/粒子图像测速/校准方法/分参数/不确定度Key words
flow measurement/particle image velocimetry/calibration method/fractional parameter/uncertainty分类
通用工业技术引用本文复制引用
单杰,黄震威,崔骊水,谢代梁,王毅,张淑婷,高山,张育闻,钱振宇..面向粒子图像测速仪的分参数校准方法[J].计量学报,2024,45(9):1324-1330,7.基金项目
国家重点研发项目(2022YFF0610805) （2022YFF0610805）
