Methods, apparatuses, and computer program products for blockage detection in porous media

Abstract

Methods, apparatuses, and computer program products for monitoring environmental conditions are provided. For example, a computer-implemented method may include transmitting a plurality of signals to a vibration actuator coupled to a resonator that is affixed to a porous media of a diffusion sensor, each of the plurality of signals causing the vibration actuator and the coupled resonator to vibrate at a corresponding different one of a plurality of frequencies; detecting a plurality of vibration displacements of the resonator, each of the plurality of vibration displacements corresponding to a different one of the plurality of frequencies; determining a maximum vibration displacement of the resonator and an associated one of the plurality of frequencies at which the maximum vibration displacement occurs, thereby determining a resonant frequency of the porous media; and periodically determining if the resonant frequency of the porous media has changed.