Electrical Resistance Tomography for Control Applications: Quantitative Study of the Gas-Liquid Distribution inside A Cyclone
Phase separation based centrifugal forces is effective, and thus widely explored by the process industry. In an inline swirl separator, a core of the light phase is formed in the center of the device and captured further downstream. Given the inlet conditions, this gas core created varies in shape a...
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MDPI AG
2020-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/21/6069 |
| _version_ | 1797549857688256512 |
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| author | Muhammad Awais Sattar Matheus Martinez Garcia Robert Banasiak Luis M. Portela Laurent Babout |
| author_facet | Muhammad Awais Sattar Matheus Martinez Garcia Robert Banasiak Luis M. Portela Laurent Babout |
| author_sort | Muhammad Awais Sattar |
| collection | DOAJ |
| description | Phase separation based centrifugal forces is effective, and thus widely explored by the process industry. In an inline swirl separator, a core of the light phase is formed in the center of the device and captured further downstream. Given the inlet conditions, this gas core created varies in shape and size. To predict the separation behavior and control the process in an optimal way, the gas core diameter should be measured with the minimum possible intrusiveness. Process tomography techniques such as electrical resistance tomography (ERT) allows us to measure the gas core diameter in a fast and non-intrusive way. Due to the soft-field nature and ill-posed problem in solving the inverse problem, especially in the area of low spatial resolution, the reconstructed images often overestimate the diameter of the object under consideration leading to unreliable measurements. To use ERT measurements as an input for the controller, the estimated diameters should be corrected based on secondary measurements, e.g., optical techniques such as high-speed cameras. In this context, image processing and image analysis techniques were adapted to compare the diameter calculated by an ERT system and a fast camera. In this paper, a correction method is introduced to correct the diameter obtained by ERT based on static measurements. The proposed method reduced the ERT error of dynamic measurements of the gas core size from over 300% to below 20%, making it a reliable sensing technique for controlled separation processes. |
| first_indexed | 2024-03-10T15:20:21Z |
| format | Article |
| id | doaj.art-04a9fe33799a461caf9d3ec974fd4ec0 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T15:20:21Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-04a9fe33799a461caf9d3ec974fd4ec02023-11-20T18:29:07ZengMDPI AGSensors1424-82202020-10-012021606910.3390/s20216069Electrical Resistance Tomography for Control Applications: Quantitative Study of the Gas-Liquid Distribution inside A CycloneMuhammad Awais Sattar0Matheus Martinez Garcia1Robert Banasiak2Luis M. Portela3Laurent Babout4Institute of Applied Computer Science, The Lodz University of Technology, Stefanowskiego 18/22, 90-924 Łódź, PolandDepartment of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The NetherlandsInstitute of Applied Computer Science, The Lodz University of Technology, Stefanowskiego 18/22, 90-924 Łódź, PolandDepartment of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The NetherlandsInstitute of Applied Computer Science, The Lodz University of Technology, Stefanowskiego 18/22, 90-924 Łódź, PolandPhase separation based centrifugal forces is effective, and thus widely explored by the process industry. In an inline swirl separator, a core of the light phase is formed in the center of the device and captured further downstream. Given the inlet conditions, this gas core created varies in shape and size. To predict the separation behavior and control the process in an optimal way, the gas core diameter should be measured with the minimum possible intrusiveness. Process tomography techniques such as electrical resistance tomography (ERT) allows us to measure the gas core diameter in a fast and non-intrusive way. Due to the soft-field nature and ill-posed problem in solving the inverse problem, especially in the area of low spatial resolution, the reconstructed images often overestimate the diameter of the object under consideration leading to unreliable measurements. To use ERT measurements as an input for the controller, the estimated diameters should be corrected based on secondary measurements, e.g., optical techniques such as high-speed cameras. In this context, image processing and image analysis techniques were adapted to compare the diameter calculated by an ERT system and a fast camera. In this paper, a correction method is introduced to correct the diameter obtained by ERT based on static measurements. The proposed method reduced the ERT error of dynamic measurements of the gas core size from over 300% to below 20%, making it a reliable sensing technique for controlled separation processes.https://www.mdpi.com/1424-8220/20/21/6069electrical resistance tomography (ERT)swirling two-phase flowdigital image processinghigh-speed camera |
| spellingShingle | Muhammad Awais Sattar Matheus Martinez Garcia Robert Banasiak Luis M. Portela Laurent Babout Electrical Resistance Tomography for Control Applications: Quantitative Study of the Gas-Liquid Distribution inside A Cyclone Sensors electrical resistance tomography (ERT) swirling two-phase flow digital image processing high-speed camera |
| title | Electrical Resistance Tomography for Control Applications: Quantitative Study of the Gas-Liquid Distribution inside A Cyclone |
| title_full | Electrical Resistance Tomography for Control Applications: Quantitative Study of the Gas-Liquid Distribution inside A Cyclone |
| title_fullStr | Electrical Resistance Tomography for Control Applications: Quantitative Study of the Gas-Liquid Distribution inside A Cyclone |
| title_full_unstemmed | Electrical Resistance Tomography for Control Applications: Quantitative Study of the Gas-Liquid Distribution inside A Cyclone |
| title_short | Electrical Resistance Tomography for Control Applications: Quantitative Study of the Gas-Liquid Distribution inside A Cyclone |
| title_sort | electrical resistance tomography for control applications quantitative study of the gas liquid distribution inside a cyclone |
| topic | electrical resistance tomography (ERT) swirling two-phase flow digital image processing high-speed camera |
| url | https://www.mdpi.com/1424-8220/20/21/6069 |
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