Acta Photonica Sinica, Volume. 51, Issue 11, 1112002(2022)
Research on Flow Field Detection System with High Precision Based on Background Oriented Schlieren
Figures & Tables(12)
Fig. 2. The relative error between the measured displacement and the actual displacement under the different optical flow
Fig. 3. The relative error between the measured displacement and the actual displacement under the different background parameters
Fig. 4. Fitting curve between the movement and measurement of background under different displacement
Fig. 7. Scene diagram of indoor alcohol lamp combustion experiment
Fig. 8. Optical flow image and wavefront of temperature pressure field
Fig. 10. Natural background，optical flow image and wavefront of voice pressure field
Table 1. The values，the relative error，the uncertainty in horizontal and vertical directions between the measured displacement and the actual displacement under different displacements
View tableView in ArticleTable 1. The values，the relative error，the uncertainty in horizontal and vertical directions between the measured displacement and the actual displacement under different displacements
Movement/pixel Horizontal
（μ+3σ）
Vertical
（μ+3σ）
Horizontal
S1/%
Vertical
S2/%
Horizontal
U1/%
Vertical
U2/%
0.1 0.100±1.19×10-2 0.100±1.21×10-2 0.018 5 0.025 0.404 0.398 0.02 0.020 0±3.72×10-3 0.020±3.94×10-3 0.094 8 0.142 0.131 0.124 0.01 0.009 94±3.10×10-3 0.009 96±2.98×10-3 0.564 0.424 0.104 0.100 0.005 0.004 99±2.90×10-3 0.004 98±2.74×10-3 0.131 0.461 0.096 9 0.091 3 0.003 3 0.003 25±2.91×10-3 0.003 21±2.69×10-3 2.47 3.57 0.094 9 0.089 8 0.002 5 0.002 41±3.08×10-3 0.002 37±2.78×10-3 3.61 5.27 0.096 9 0.092 8
Table 2. The time of function restructing and the RMSE between original and reconstructed function
View tableView in ArticleTable 2. The time of function restructing and the RMSE between original and reconstructed function
Function Algorithm t/s RMSE Aperiodic ASDI 0.211 0.079 GS 9.022 0.049 Periodic ASDI 0.283 0.227 GS 8.404 0.138
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Shiwei LIU, Haiping MEI, Yichong REN, Zhiwei TAO, Azezigul Abdukirim, Junxin ZHANG, Yanling LI, Ruizhong RAO. Research on Flow Field Detection System with High Precision Based on Background Oriented Schlieren[J]. Acta Photonica Sinica, 2022, 51(11): 1112002
Paper Information
Category: Instrumentation, Measurement and Metrology
Received: Feb. 17, 2022
Accepted: Mar. 28, 2022
Published Online: Dec. 13, 2022
The Author Email: MEI Haiping (hpmei@aiofm.ac.cn)
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