Quantitative measurement of colored-fringe background oriented schlieren based on three-step phase shifting

Yingwei Zhu; Yang Song; Xiangju Qu; Zhenhua Li; Anzhi He

doi:10.1117/12.2500908

6 November 2018 Quantitative measurement of colored-fringe background oriented schlieren based on three-step phase shifting

Yingwei Zhu, Yang Song, Xiangju Qu, Zhenhua Li, Anzhi He

Author Affiliations +

Proceedings Volume 10819, Optical Metrology and Inspection for Industrial Applications V; 108191N (2018) https://doi.org/10.1117/12.2500908
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

Background Oriented Schlieren (BOS) technique can be applied for quantitative flow field diagnosis with simple experimental configurations. One of the crucial steps of BOS techniques is the extraction of image displacement vectors. The cross-correlation algorithm widely used in PIV techniques have been introduced to address the BOS extraction. However, the cross-correlation algorithm depends on interrogation windows, which usually results in low spatial resolving or unstable results. This paper proposes an improved BOS approach based on three step phase-shifting algorithm with the usage of a colored-fringe pattern as background. RGB coded carrier-fringe image is composed of three phase-shifted images. Displacement vectors are extracted by comparing the different phases between the corresponding points in three separated images. This technique avoids the problem of selecting the interrogation window. Only one image is required in this approach. An experimental setup on the measurement of hot air gun was carried out by use of our proposed method. The results demonstrate that this technique can be used for quantitative measurement in flow field.

Citation Download Citation

Yingwei Zhu, Yang Song, Xiangju Qu, Zhenhua Li, and Anzhi He "Quantitative measurement of colored-fringe background oriented schlieren based on three-step phase shifting", Proc. SPIE 10819, Optical Metrology and Inspection for Industrial Applications V, 108191N (6 November 2018); https://doi.org/10.1117/12.2500908

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available