TDR response properties and their use in the estimation of soil permittivity

Savi, Patrizia; Maio, Ivano Adolfo; Stievano, Igor Simone

doi:10.1109/imtc.2007.379459

Cited by 2 publications

(1 citation statement)

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“…With the advancement of engineering design and construction technology, on-site monitoring of the basic physical parameters of soil such as water content and density becomes more and more important [1][2][3]. Feller-Feldegg (1969) introduced a method that can measure the complex permittivity of liquids, called a time domain reflectometry (TDR) [4].…”

Section: Introductionmentioning

confidence: 99%

Research on the Method of Measuring Soil Water Content by Time Domain Reflectometry

Cui

Kong

2022

J. Phys.: Conf. Ser.

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Time domain reflectometry (TDR) can calculate the water content by testing the dielectric constant of the rock and soil medium, but the TDR measurement results under time domain conditions are susceptible to the influence of soil conductivity. This article introduces the basic theory of TDR measurement, then uses the transmission scattering matrix to describe the transmission equation, analyzes the dielectric constant in the frequency domain, simulates the TDR waveform with matlab based on the Debye model, and fits the simulated waveform to the measured waveform, and then according to the simulated waveform The matching degree proves the feasibility of calibrating the dielectric constant of the soil. Taking clay as the measurement object, finally fitting a simulation waveform with a higher degree of matching with the measurement waveform, which proves the feasibility of the method and has certain reference value for the study of the TDR method of measuring soil dielectric constant and water content.

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Section: Introductionmentioning

confidence: 99%