Dielektriskās caurlaidības sensora kalibrācija augsnes mitruma noteikšanai
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Latvijas Universitāte
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lav
Abstract
Darbā tiek pētītas īpašības un parametri, kas ietekmē kapacitātes/impedances tipa augsnes mitruma sensoru precizitāti. Eksperimenti tiek veikti, izmantojot trīs ūdens samazināšanas metodes. Tiek apskatīts un analizēts, kā ūdens elektrovadītspēja maina dielektrisko caurlaidību akmens vates un kokosa šķiedru substrātos. Īpaša uzmanība ir pievērsta akmens vates substrātu ūdens piesātināšanai. Šie rezultāti ir attēloti ar kalibrācijas līknēm pētītajiem materiāliem, kas parāda ūdens masas daļas atkarību no dielektriskās caurlaidības.
The work explores properties and parameters that affect the accuracy of capacity/impedance type soil moisture sensors. The experiments are conducted using three water reduction methods. It is examined how water electric conductivity changes dielectric permittivity in rockwool and coconut fiber substrates. Particular attention has been paid to saturation of the rockwool substrates. These results are presented with the calibration curves of studied materials showing the dependence of dielectric permittivity on the water mass content.
The work explores properties and parameters that affect the accuracy of capacity/impedance type soil moisture sensors. The experiments are conducted using three water reduction methods. It is examined how water electric conductivity changes dielectric permittivity in rockwool and coconut fiber substrates. Particular attention has been paid to saturation of the rockwool substrates. These results are presented with the calibration curves of studied materials showing the dependence of dielectric permittivity on the water mass content.