Arbitrary position 3D tomography for practical application in combustion diagnostics
(2022) In Measurement Science and Technology 33(12).- Abstract
This work aims to make three-dimensional (3D) tomographic techniques more flexible and accessible to in-situ measurements in practical apparatus by allowing arbitrary camera placements that benefit applications with more restrictive optical access. A highly customizable, in-house developed tomographic method is presented, applying smoothness priors through Laplacian matrices and hull constraints based on 3D space carving. The goal of this paper is to showcase a reconstruction method with full user control that can be adopted to various 3D field reconstructions. Simulations and experimental measurements of unsteady premixed CH4/air and ethanol (C2H5OH) diffusion pool flames were evaluated, comparing... (More)
This work aims to make three-dimensional (3D) tomographic techniques more flexible and accessible to in-situ measurements in practical apparatus by allowing arbitrary camera placements that benefit applications with more restrictive optical access. A highly customizable, in-house developed tomographic method is presented, applying smoothness priors through Laplacian matrices and hull constraints based on 3D space carving. The goal of this paper is to showcase a reconstruction method with full user control that can be adopted to various 3D field reconstructions. Simulations and experimental measurements of unsteady premixed CH4/air and ethanol (C2H5OH) diffusion pool flames were evaluated, comparing arbitrarily placed cameras around the probed domain to the more commonly used in-plane-half-circle camera arrangement. Reconstructions reproduced expected topological field features for both flame types. Results showed slight decrease in reconstruction quality for arbitrarily placed cameras compared to in-plane-half-circle arrangement. However, at lower numbers of camera views (N q ⩽ 6) arbitrary placement showed better results. The introduced methodology will be useful for optically limited setups in terms of handling a priori information, camera placement and 3D field evaluation.
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- author
- Sanned, David LU ; Lindström, Johan LU ; Roth, Adrian LU ; Aldén, Marcus LU and Richter, Mattias LU
- organization
- publishing date
- 2022-12
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- 3D, combustion, diagnostics, inverse problem, tomography
- in
- Measurement Science and Technology
- volume
- 33
- issue
- 12
- article number
- 125206
- publisher
- IOP Publishing
- external identifiers
-
- scopus:85139609473
- ISSN
- 0957-0233
- DOI
- 10.1088/1361-6501/ac92a1
- language
- English
- LU publication?
- yes
- id
- e7d40881-34eb-402a-a37c-bfcbd62ca49d
- date added to LUP
- 2022-12-06 14:43:16
- date last changed
- 2023-11-21 16:57:06
@article{e7d40881-34eb-402a-a37c-bfcbd62ca49d, abstract = {{<p>This work aims to make three-dimensional (3D) tomographic techniques more flexible and accessible to in-situ measurements in practical apparatus by allowing arbitrary camera placements that benefit applications with more restrictive optical access. A highly customizable, in-house developed tomographic method is presented, applying smoothness priors through Laplacian matrices and hull constraints based on 3D space carving. The goal of this paper is to showcase a reconstruction method with full user control that can be adopted to various 3D field reconstructions. Simulations and experimental measurements of unsteady premixed CH<sub>4</sub>/air and ethanol (C<sub>2</sub>H<sub>5</sub>OH) diffusion pool flames were evaluated, comparing arbitrarily placed cameras around the probed domain to the more commonly used in-plane-half-circle camera arrangement. Reconstructions reproduced expected topological field features for both flame types. Results showed slight decrease in reconstruction quality for arbitrarily placed cameras compared to in-plane-half-circle arrangement. However, at lower numbers of camera views (N <sub>q</sub> ⩽ 6) arbitrary placement showed better results. The introduced methodology will be useful for optically limited setups in terms of handling a priori information, camera placement and 3D field evaluation.</p>}}, author = {{Sanned, David and Lindström, Johan and Roth, Adrian and Aldén, Marcus and Richter, Mattias}}, issn = {{0957-0233}}, keywords = {{3D; combustion; diagnostics; inverse problem; tomography}}, language = {{eng}}, number = {{12}}, publisher = {{IOP Publishing}}, series = {{Measurement Science and Technology}}, title = {{Arbitrary position 3D tomography for practical application in combustion diagnostics}}, url = {{http://dx.doi.org/10.1088/1361-6501/ac92a1}}, doi = {{10.1088/1361-6501/ac92a1}}, volume = {{33}}, year = {{2022}}, }