Deep Probabilistic Indoor Gas Source Localization via Physical Dependency-Guided Sequential Inference

• URL: http://arxiv.org/abs/2608.16221v1
• Date: Mon, 17 Aug 2026 07:54:02 GMT
• Title: Deep Probabilistic Indoor Gas Source Localization via Physical Dependency-Guided Sequential Inference
• Abstract summary: Gas source localization is critical to safety in industrial and urban environments.<n>High-fidelity models can capture these effects, but their computational cost limits online use.<n>We propose a deep probabilistic framework that infers the source posterior from sparse and noisy measurements collected by a mobile robot.
• Score: 8.887264017437465
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Reliable gas source localization (GSL) is critical to safety in industrial and urban environments, yet remains challenging indoors because walls and obstacles interact with airflow to create complex gas dispersion. High-fidelity models such as computational fluid dynamics and filament models can capture these effects, but their computational cost limits online use. We propose a deep probabilistic framework that infers the source posterior from sparse and noisy measurements collected by a mobile robot. Unlike end-to-end models that directly infer source estimates from measurements, the proposed method incorporates physical dependencies of indoor gas transport, where wind and source location govern the concentration field. These dependencies are embedded through sequential conditional inference, in which inferred wind and concentration fields guide source posterior estimation. This structure improves localization under sparse and noisy observations. Evaluations show that the proposed method outperforms representative GSL baselines and enables accurate and efficient active GSL in simulations. Real-robot experiments demonstrate the feasibility of online operation on an embedded GPU.

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