中国计量学院学报2013，Vol.24Issue(1)：8-13,34,7.
频率调制多普勒全场测速实验系统测试
Test on a frequency modulation Doppler global velocimetry system
摘要
Abstract
Frequency modulation Doppler global velocimetry (DGV), which was based on molecular/atomic filter principle and laser Doppler shift phenomenon, had great potential use in the cases of high supersonic speed and large scale wind tunnels. We developed an FM-DGV system, of which a CCD camera was used as the detector to receive the scattering light. The system was made up of a narrow band laser, a light-sheet-forming optics, an iodine cell, an image acquisition CCD camera, and a frequency monitor unit. Based on this system, measurement was carried out on the ratio of amplitudes of the first and second harmonics, and on the velocity distribution of a rotating wheel. The results showed that the system is stable with the maximum velocity measurement error less than 2 m/s.关键词
频率调制/多普勒全场测速/分子滤波Key words
frequency modulation/ Doppler global velocimetry/ molecular filter分类
航空航天引用本文复制引用
王天宇,张洪军,何春生,赵晓东..频率调制多普勒全场测速实验系统测试[J].中国计量学院学报,2013,24(1):8-13,34,7.基金项目
国家自然科学基金资助项目(No.10972210). （No.10972210）
