[KSCI] Korea Science Citation Index Service

Development of Signal Processing Technique of Digital Speckle Tomography for Analysis of Three-Dimensional Density Distributions of Unsteady and Asymmetric Gas Flow

Baek, Seung-Hwan (School of Mechanical Engineering, Sungkyunkwan University)
Kim, Yong-Jae (School of Mechanical Engineering, Sungkyunkwan University)
Ko, Han-Seo (School of Mechanical Engineering, Sungkyunkwan University)

Publication Information

Journal of the Korean Society for Nondestructive Testing / v.26, no.2, 2006 , pp. 108-114 More about this Journal

Abstract

Transient and asymmetric density distributions of butane flow have been investigated from laser image signals by developed three-dimensional digital speckle tomography. Moved signals of speckles have been captured by multiple CCD images in three angles of view simultaneously because the flows were asymmetric and transient. The signals of speckle movements between no flow and downward butane flow from a circular half opening have been calculated by a cross-correlation tracking method so that those distances can be transferred to deflection angles of laser rays fur density gradients. The three-dimensional density fields have been reconstructed from the fringe shift signal which is integrated from the deflection angle by a real-time multiplicative algebraic reconstruction technique (MART).

Keywords

Digital Speckle Tomography; Cross-Correlation; Multiplicative Algebraic Reconstruction Technique; Butane Flow;

Citations & Related Records

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