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  • Bartholmai, Matthias (1)
  • Lazik, D. (1)
  • Neumann, Patrick P. (1)

Erscheinungsjahr

  • 2015 (1) (entfernen)

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  • Gas storage areas (1) (entfernen)

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  • 8.1 Sensorik, mess- und prüftechnische Verfahren (1) (entfernen)

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Near real-time reconstruction of 2D soil gas distribution from a regular network of linear gas sensors (2015)
Neumann, Patrick P. ; Bartholmai, Matthias ; Lazik, D.
A monitoring method is introduced that creates, in near real-time, two-dimensional (2D) maps of the soil gas distribution. The method combines linear gas sensing technology for in-situ monitoring of gases in soil with the mapping capabilities of Computed Tomography (CT) to reconstruct spatial and temporal resolved gas distribution maps. A weighted iterative algebraic reconstruction method based on Maximum Likelihood with Expectation Maximization (MLEM) in combination with a source-by-source reconstruction approach is introduced that works with a sparse setup of orthogonally-aligned linear gas sensors. The reconstruction method successfully reduces artifact production, especially when multiple gas sources are present, allowing the discrimination between true and non-existing so-called ghost source locations. A first experimental test indicates the high potential of the proposed method for, e.g., rapid gas leak localization.
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