Utilization of Rayleigh waves for engine oil level measurements

Abstract

The paper deals with the problematics of the measurement of engine oil level based on the correlation between the attenuation of the surface Rayleigh wave and the fluid level. Available literature offers a few methods, which utilizes the surface acoustic waves for such a purpose, leaving the problem not completely resolved. The theoretical assumptions regarding Rayleigh wave formation on the free surface were supported by numerical simulations in COMSOL Multiphysics software. The final part of this article describes an experimental device that has been designed and manufactured for the measurement purposes including the proposal of the measuring method based on the attenuation of Rayleigh surface waves under the influence of propagation along the solid-liquid interface.