Keyword: «3d reconstruction»

The paper presents the results of the development and testing of a technique for non-invasive monitoring of pore moisture dynamics in a dispersed material (sand) under freezing conditions. The technique is based on the use of a specialized cylindrical capacitance sensor, which allows reconstructing the spatial distribution of dielectric permittivity correlated with moisture content. Laboratory experiments involved unidirectional freezing of soil samples with different initial moisture contents. Based on a series of measurements, a three-dimensional reconstruction of the dielectric constant was performed. The technique was verified by comparison with data from the reference gravimetric method. Satisfactory quantitative agreement between the moisture distributions obtained by the capacitance and gravimetric methods is demonstrated, confirming the adequacy of the proposed approach.