Study of the Possibility of Using Langatate and Langasite Crystals as a sensing element in Vehicle Weight Sensors in Dynamics

Abstract

The main goal of this work is to analyze the possibility of using commercially available piezoelectric crystals of langasite (La3Ga5SiO14) and langatate (La3Ga5.5Ta0.5O14) as a sensitive element in vehicle weight sensors in dynamics, as an alternative to the already proven quartz crystals used for this purpose. For this purpose, we analyzed and compared the amplitudes of the output signal obtained at the faces of langasite, langatate, and quartz crystals using finite element simulations (in COMSOL Multiphysics 5.6 software) and analytical simulations. The results show that langasite and langatate crystals can be used on a par with quartz crystal to obtain qualitative results of vehicle weight measurement in dynamic weighing.