EIT measurement system with high phase accuracy for the imaging of spectral induced polarization properties of soils and sediments
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| Title: | Main Title: EIT measurement system with high phase accuracy for the imaging of spectral induced polarization properties of soils and sediments |
| Description: | Abstract: A powerful method for the non-invasive structural characterization of material is electrical impedance tomography (EIT) combined with the capabilities of impedance spectroscopy. This method determines the complex resistivity magnitude and phase images at a set of different measurement frequencies. We are particularly interested in the application of such an advanced approach for the improved characterization of soils and sediments, which only show a weak polarizability. Here, typical phase values lie between 1 and 20 mrad only, requiring instrumentation with relatively high phase resolution and accuracy. In this paper, we present a new spectral EIT data acquisition system for laboratory applications, which operates in the frequency range from 1 mHz to 45 kHz and which was developed to meet these requirements. In this context, we also present a new measurement method based on current injection swapping, which leads to significantly improved phase images, particularly for higher measurement frequencies. The system and the new measurement method are tested on a water-filled tank and column containing different 2D and 3D targets (metallic and biological objects). The tests prove a phase accuracy of 1 mrad for frequencies of up to 1 kHz and higher, resulting in a clear discrimination of the objects on the basis of the reconstructed phase images. |
| Identifier: | 10.1088/0957-0233/19/9/094010 (DOI) |
Responsible Party
| Creators: | Egon Zimmermann (Author), Andreas Kemna (Author), Joachim Berwix (Author), Walter Glaas (Author), Harry Vereecken (Author) |
| Publisher: | IOP Publishing Ltd |
| Publication Year: | 2013 |
Topic
| TR32 Topic: | Soil |
| Related Subproject: | A3 |
| Subjects: | Keywords: EIT, Impedance Spectrometer, Impedance Tomography, SIP, Electrical Soil, Sediment |
File Details
| Filename: | 2008_Zimmermann_MST_b.pdf |
| Data Type: | Text - Article |
| Size: | 9 Pages |
| File Size: | 1.3 MB |
| Date: | Issued: 24.07.2008 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | For internal use only |
| Access Limitations: | For internal use only |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Measurement Science and Technology |
| Source Website: | www.iopscience.iop.org |
| Volume: | 19 |
| Number of Pages: | 9 (1 - 9) |
Metadata Details
| Metadata Creator: | Johann Alexander (Sander) Huisman |
| Metadata Created: | 02.12.2013 |
| Metadata Last Updated: | 02.12.2013 |
| Subproject: | A3 |
| Funding Phase: | 1 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Metadata Downloads: | 0 |
| Dataset Downloads: | 0 |
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