Browsing by Author "BOUNAB ANIS"

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    Design and Modeling of a Micro Pressure Sensor for Biomedical Applications
    (University of Msila, 2025) BOUNAB ANIS; BOUGOUTAIA MOHAMED; ENCA/ LAKHDARI Abdelghani
    This memory focuses on the modeling and design of a pressure sensor for biomedical applications. The sensor is a capacitive MEMS (microelectromechanical systems) device used to measure blood pressure. Its sensing element is a thin circular silicon membrane [100], tightly clamped at the edges and subjected to a uniform static pressure. The analysis was performed assuming small deformations. In the first part of the work, the mechanical behavior of the membrane was studied. Based on accurate mathematical equations, we modeled the membrane deformation, capacitive response, and sensor sensitivity using MATLAB. The results demonstrate a linear capacitive response over a pressure range of 0 to 40 kPa (0 to 300 mmHg), with high sensitivity. These results were validated through numerical simulations using COMSOL Multiphysics. In the second part of the memory, the capacitive pressure sensor was integrated into a conditioning circuit simulated using PSPICE. The circuit's output voltage varies linearly with the applied pressure.