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Spray drop measurements using depth from defocus

Zhou, Wu ; Tropea, Cameron ; Chen, Benting ; Zhang, Yukun ; Luo, Xu ; Cai, Xiaoshu (2021):
Spray drop measurements using depth from defocus. (Publisher's Version)
In: Measurement Science and Technology, 31 (7), IOP Publishing, ISSN 0957-0233, e-ISSN 1361-6501,
DOI: 10.26083/tuprints-00019333,

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Spray drop measurements using depth from defocus
Language: English

Sprays are typically characterised by providing local drop size and velocity distributions and number density. The present work examines the possibility of obtaining such information using backlight photography, whereby two cameras are employed and the size and position of each imaged drop is obtained using a depth from defocus approach. A simple algorithm for estimating size and position from the two camera images is introduced and the sensitivity of this algorithm to various system parameters is investigated with simulations using synthetic images, measurements from a calibration facility, and measurements conducted in a sparse spray. Comparison measurements using the analysis of focused images are provided.

Journal or Publication Title: Measurement Science and Technology
Volume of the journal: 31
Issue Number: 7
Place of Publication: Darmstadt
Publisher: IOP Publishing
Collation: 10 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
Divisions: 16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA)
Date Deposited: 24 Aug 2021 07:13
Last Modified: 24 Jun 2022 18:02
DOI: 10.26083/tuprints-00019333
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-193333
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19333
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