Acoustic sensor for volumetric detection of natural and industrial Vinegar

Abstract This paper reports numerical research based on phononic crystals as the two-dimensional periodic arrangements to design a sensor for sensing the acid concentration in both natural and industrial Vinegar. The proposed solid-fluid array consists of a stainless steel as matrix and liquid-filled scatterers. Defect modes are introduced into the bandgap through a linear waveguide, formed by adjusting the inclusion radii. A resonant cavity is integrated into the waveguide to establish a resonance mode within the defect frequency spectrum. It has been shown through finite element simulations that the sensor can quantify the acid content in both natural and industrial Vinegar. Finally, the sensor is optimized to sense all percentages of acetic acid in the Vinegar.