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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Skierucha, W.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2021Application of a dagger probe for soil dielectric permittivity measurement by TDRcitations
- 2020Application of a Monopole Antenna Probe with an Optimized Flange Diameter for TDR Soil Moisture Measurementcitations
- 2020Time domain transmission sensor for soil moisture profile probe, selected technical aspects citations
- 2020Evaluation of a Multi-Rod Probe Performance for Accurate Measurements of Soil Water Contentcitations
- 2020Dielectric Properties of Glass Beads with Talc as a Reference Material for Calibration and Verification of Dielectric Methods and Devices for Measuring Soil Moisturecitations
- 2020Wideband Characterization of Soil Complex Dielectric Permittivity Spectrum
- 2019Impact of soil salinity, texture and measurement frequency on the relations between soil moisture and 20 MHz–3 GHz dielectric permittivity spectrum for soils of medium texturecitations
- 2019An open-ended probe with an antenna for the measurement of the water content in the soilcitations
- 2019One-Port Vector Network Analyzer Characterization of Soil Dielectric Spectrumcitations
- 2019Verification of soil salinity index model based on 0.02–3 GHz complex dielectric permittivity spectrum measurementscitations
- 2019Seven-Rod Dielectric Sensor for Determination of Soil Moisture in Small Volumes
- 2019A Seven-Rod Dielectric Sensor for Determination of Soil Moisture in Well-Defined Sample Volumescitations
- 2018The Calibration-Free Method for Determining Dielectric Permittivity Spectrum
- 2018Electromagnetic multi-simulation method for determining dielectric permittivity spectrum
- 2018Impact of soil salinity on the relation between soil moisture and dielectric permittivitycitations
- 2018The Effect of Storage Time on Dielectric Properties of Pasteurized Milks and Yoghurtcitations
- 2017Soil salinity characterization based on 0.05-3 GHz dielectric permittivity measurementscitations
- 2017Wideband extraction of soil dielectric spectrum from vector-network-analyzer measurementscitations
- 20170.05–3 GHz VNA characterization of soil dielectric properties based on the multiline TRL calibrationcitations
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article
Application of a dagger probe for soil dielectric permittivity measurement by TDR
Abstract
The most basic parameter of soil is volumetric water content (VWC). This parameter is typically determined indirectly, based on other parameters. Currently, a widely used method for indirect VWC determination is a method which is based on soil dielectric permittivity (DP) measurement, using the well-known Topp formula. The paper presents a novel probe for soil VWC and electrical conductivity (EC) measurement employing the above method. The new probe is going to be adopted on a mobile plant-watering machines used in precise agriculture e.g. for plants watering, thus it features a robust mechanical design and allows for instantaneous readout of VWC and EC values. The design of the probe mimics a dagger with three flat conductors forming a short-circuited coplanar waveguide with the space between the conductors filled with a mineral cold-curing resin. The resin filling the space between the bars improves the mechanical stiffness of the probe and ensures constant electrical parameters, which increases the measurement accuracy. In the first step, Ansys HFSS software was used to perform electromagnetic (EM), numerical simulations for the proposed solution, in order to determine the optimal electrical parameters of the probe. Next, a probe prototype was made to carry out laboratory tests. The measurements were performed with the use of a vector network analyzer (VNA) in the frequency range (3.74 MHz − 3 GHz). The measured complex reflection coefficients were transformed into the time domain with the use of the inverse Discrete Fourier Transform (IDFT). Based on the time distance between the reflections of an electric pulse traveling along the probe's sensing element, bulk dielectric permittivity of soil surrounding the probe can be calculated. A linear relation between the square root of DP and the pulse propagation time was obtained. Also, the probe was calibrated for bulk electrical conductivity measurements.