Fusion of cantilever and diaphragm pressure sensors according to frequency characteristics

Abstract

This paper reports on an approach to measure sensitive barometric pressure by fusing a cantilever-based differential pressure sensor (DPS) and a commercially available diaphragm-based absolute pressure sensor (APS). At high frequency, the DPS can detect smaller pressure change than the APS. At low frequency, the APS shows less drift absolute pressure than the DPS. By utilizing the DPS and APS at each advantageous frequency, we propose a highly sensitive and drift-free measurement of barometric pressure.