| Autor: |
Zhao, C. X., Richardson, I. M., Kenjeres, S., Kleijn, C. R., Saldi, Z. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; Jun2009, Vol. 105 Issue 12, p123104-123112, 8p, 3 Color Photographs, 4 Diagrams, 1 Chart, 3 Graphs |
| Abstrakt: |
The oscillation of a weld pool surface makes the fluid flow motion quite complex. Two-dimensional results cannot reflect enough information to quantitatively describe the fluid flow in the weld pool; however, there are few direct three-dimensional results available. In this paper, we describe a three-dimensional reconstruction method to measure weld pool surface features based on a single high-speed camera. A stereo adapter was added in front of the high-speed camera lens to obtain two images in the same frame from different view points at the same time. According to machine vision theory, three-dimensional parameters can be reconstructed based on two such images. In this work, three-dimensional velocity fields have been obtained using this method. Based on the calibration technique employed, the associated error is estimated to be less than 11.4%. Quantitative experimental results are useful for understanding the flow pattern, and possibly for controlling the flow of liquid in the weld pool. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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