On the Implementation of Simultaneous Multi-Frequency Excitations and Measurements for Electrical Impedance Tomography
The investigation of quickly-evolving flow patterns in high-pressure and high-temperature flow rigs requires the use of a high-speed and non-intrusive imaging technique. Electrical Impedance Tomography (EIT) allows reconstructing the admittivity distribution characterizing a flow from the knowledge...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/19/17/3679 |
| _version_ | 1811298807874322432 |
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| author | Mathieu Darnajou Antoine Dupré Chunhui Dang Guillaume Ricciardi Salah Bourennane Cédric Bellis |
| author_facet | Mathieu Darnajou Antoine Dupré Chunhui Dang Guillaume Ricciardi Salah Bourennane Cédric Bellis |
| author_sort | Mathieu Darnajou |
| collection | DOAJ |
| description | The investigation of quickly-evolving flow patterns in high-pressure and high-temperature flow rigs requires the use of a high-speed and non-intrusive imaging technique. Electrical Impedance Tomography (EIT) allows reconstructing the admittivity distribution characterizing a flow from the knowledge of currents and voltages on its periphery. The need for images at high frame rates leads to the strategy of simultaneous multi-frequency voltage excitations and simultaneous current measurements, which are discriminated using fast Fourier transforms. The present study introduces the theory for a 16-electrode simultaneous EIT system, which is then built based on a field programmable gate array data acquisition system. An analysis of the propagation of uncertainties through the measurement process is investigated, and experimental results with fifteen simultaneous signals are presented. It is shown that the signals are successfully retrieved experimentally at a rate of 1953 frames per second. The associated signal-to-noise ratio varies from 59.6−69.1 dB, depending on the generated frequency. These preliminary results confirm the relevance and the feasibility of simultaneous multi-frequency excitations and measurements in EIT as a means to significantly increase the imaging rate. |
| first_indexed | 2024-04-13T06:24:52Z |
| format | Article |
| id | doaj.art-96f7ac90349d47739e00214dd8cb950e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T06:24:52Z |
| publishDate | 2019-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-96f7ac90349d47739e00214dd8cb950e2022-12-22T02:58:28ZengMDPI AGSensors1424-82202019-08-011917367910.3390/s19173679s19173679On the Implementation of Simultaneous Multi-Frequency Excitations and Measurements for Electrical Impedance TomographyMathieu Darnajou0Antoine Dupré1Chunhui Dang2Guillaume Ricciardi3Salah Bourennane4Cédric Bellis5CEA Cadarache, 13115 Saint-Paul-lez-Durance, FranceDepartment of Paediatrics, University of Geneva, 1205 Geneva, SwitzerlandCEA Cadarache, 13115 Saint-Paul-lez-Durance, FranceCEA Cadarache, 13115 Saint-Paul-lez-Durance, FranceÉcole Centrale de Marseille, 38 Rue Frédéric Joliot Curie, 13013 Marseille, FranceAix Marseille Univ, CNRS, Centrale Marseille, LMA UMR 7031, Marseille, FranceThe investigation of quickly-evolving flow patterns in high-pressure and high-temperature flow rigs requires the use of a high-speed and non-intrusive imaging technique. Electrical Impedance Tomography (EIT) allows reconstructing the admittivity distribution characterizing a flow from the knowledge of currents and voltages on its periphery. The need for images at high frame rates leads to the strategy of simultaneous multi-frequency voltage excitations and simultaneous current measurements, which are discriminated using fast Fourier transforms. The present study introduces the theory for a 16-electrode simultaneous EIT system, which is then built based on a field programmable gate array data acquisition system. An analysis of the propagation of uncertainties through the measurement process is investigated, and experimental results with fifteen simultaneous signals are presented. It is shown that the signals are successfully retrieved experimentally at a rate of 1953 frames per second. The associated signal-to-noise ratio varies from 59.6−69.1 dB, depending on the generated frequency. These preliminary results confirm the relevance and the feasibility of simultaneous multi-frequency excitations and measurements in EIT as a means to significantly increase the imaging rate.https://www.mdpi.com/1424-8220/19/17/3679FPGAhigh-speed EITfrequency division multiplexingONE-SHOTEIDORS |
| spellingShingle | Mathieu Darnajou Antoine Dupré Chunhui Dang Guillaume Ricciardi Salah Bourennane Cédric Bellis On the Implementation of Simultaneous Multi-Frequency Excitations and Measurements for Electrical Impedance Tomography Sensors FPGA high-speed EIT frequency division multiplexing ONE-SHOT EIDORS |
| title | On the Implementation of Simultaneous Multi-Frequency Excitations and Measurements for Electrical Impedance Tomography |
| title_full | On the Implementation of Simultaneous Multi-Frequency Excitations and Measurements for Electrical Impedance Tomography |
| title_fullStr | On the Implementation of Simultaneous Multi-Frequency Excitations and Measurements for Electrical Impedance Tomography |
| title_full_unstemmed | On the Implementation of Simultaneous Multi-Frequency Excitations and Measurements for Electrical Impedance Tomography |
| title_short | On the Implementation of Simultaneous Multi-Frequency Excitations and Measurements for Electrical Impedance Tomography |
| title_sort | on the implementation of simultaneous multi frequency excitations and measurements for electrical impedance tomography |
| topic | FPGA high-speed EIT frequency division multiplexing ONE-SHOT EIDORS |
| url | https://www.mdpi.com/1424-8220/19/17/3679 |
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