Description
Currently, underwater mines and unexploded ordnance represent a persistent threat to maritime navigation and the environment. In submarine warfare, detecting such objects is particularly challenging, especially when they are abandoned and buried under sand. To address this issue, mine countermeasures have been developed that take advantage of various technologies, including acoustic and electromagnetic waves. Recently, new modeling approaches for ground penetrating radar (GPR) have led to significant advancements in the detection of buried landmines. The aim of this work is therefore to adapt the GPR methodology to enhance the detection and classification of underwater targets using sonar systems.Additional Description
To achieve this, laboratory experiments were conducted to simulate various scenarios involving asonar sensor, a sediment layer, and various targets. Particular attention was given to understanding
the measurements and pre-processing steps specific to the sensor. Subsequently, extensive numerical
simulations were performed to validate and compare the results obtained experimentally. This comparison involved introducing the concept of a perfect acoustic reflector (PAR), which is useful for retrieving the transfer functions of the sonar-hydrophone-multilayered media system. These experiments highlighted both the limitations and potential of the model for analyzing realistic scenarios.
| Period | 1 Feb 2024 → 31 Jan 2025 |
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| Examinee | Lucas Pirot |
| Examination held at |
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| Degree of Recognition | National |