Background Oriented Schlieren Method Using Multi-scale Periodic Pattern

机译：多尺度周期模式的背景定向Schlieren方法

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A new BOS method using periodic brightness patterns as the background screen of the BOS system is introduced. The data processing of the method is much faster than that of the ordinary BOS with a random-dots background. The problem of phase inversion that characterizes this method is circumvented by introducing a background pattern synthesized from two periodic patterns with different frequencies.This new technique was applied to visualization of thermal convection and underexpanded free jet and the usefulness of the method was confirmed.

机译：介绍了一种使用周期性亮度模式作为BOS系统背景屏幕的BOS新方法。该方法的数据处理比具有随机点背景的普通BOS的数据处理要快得多。通过引入由两个不同频率的周期性模式合成的背景模式，克服了表征该方法的相位反转问题。将该新技术应用于热对流和膨胀不足的自由射流的可视化，并证实了该方法的实用性。

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《International Symposium on Shock Waves》|2015年|453-458|共6页
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Kazuaki Hatanaka; Tsutomu Saito;
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1. Assessment and application of quantitative schlieren methods: Calibrated color schlieren and background oriented schlieren [J] . Elsinga GE., van Oudheusden BW., Scarano F., Experiments in Fluids: Experimental Methods and Their Applications to Fluid Flow . 2004,第2期

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2. Study of Shock-wave Flows in the Channel by Schlieren and Background Oriented Schlieren Methods [J] . F. N. Glazyrin, I. A. Znamenskaya, I. V. Mursenkova, Optoelectronics, Instrumentation and Data Processing . 2012,第3期

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3. Multi-scale approach for analyzing convective heat transfer flow in background-oriented Schlieren technique [J] . Rajshekhar Gannavarpu, Ambrosini Dario Optics and Lasers in Engineering . 2018,第NOVa期

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4. Background Oriented Schlieren Method Using Multi-scale Periodic Pattern [C] . Kazuaki Hatanaka, Tsutomu Saito International Symposium on Shock Waves . 2015

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5. Three-Dimensional Shock Wave Reconstruction Using Multiple High-Speed Digital Cameras and Background Oriented Schlieren Imaging [D] . Winter, Kyle Oakley. 2018

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6. Background-oriented schlieren imaging and tomography for rapid measurement of FUS pressure fields: initial results [O] . Michael Kremer, Charles Caskey, William Grissom 2015

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7. Multi-scale approach for analyzing convective heat transfer flow in background-oriented Schlieren technique [O] . Gannavarpu Rajshekhar, Dario Ambrosini 2018

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8. Background-Oriented Schlieren Pattern Optimization [R] . Hartberger, J. E. 2011

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Background Oriented Schlieren Method Using Multi-scale Periodic Pattern

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