Abstract
This paper presents the design, implementation, and evaluation of an optical fiber imaging based tomographic system for the 3-D visualization and characterization of a burner flame. Eight imaging fiber bundles coupled with two RGB charge-coupled device cameras are used to acquire flame images simultaneously from eight different directions around the burner. The fiber bundle has 30k picture elements and an objective lens with a 92 \circ angle of view. The characteristic evaluation of the imaging fiber bundles and the calibration of the system were conducted to ensure the accuracy of the system. A new tomographic algorithm that combines the logical filtered back-projection and the simultaneous algebraic reconstruction technique is proposed to reconstruct the flame sections from the images. A direct comparison between the proposed algorithm and other tomographic approaches is conducted through computer simulation for different test templates and numbers of projections. The 3-D reconstruction of the cross- and longitudinal-sections of a burner flame from image projections obtained from the imaging system was also performed. The effectiveness of the imaging system and computer algorithm is assessed through experimental tests.
Original language | English |
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Pages (from-to) | 1417-1425 |
Number of pages | 9 |
Journal | IEEE Transactions on Instrumentation and Measurement |
Volume | 61 |
Issue number | 5 |
Early online date | 5 Mar 2012 |
DOIs | |
Publication status | Published - 1 May 2012 |
Keywords
- charge-coupled device (CCD) camera
- flame
- imaging fiber
- luminosity distribution
- three-dimensional reconstruction
- tomography