Open AccessStudy on influence and compensation for soil compactness on volumetric water content measurement
Author(s) -
Huaming Tian,
Cuimin Gao,
Zhen Gao,
Yandong Zhao
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/346/1/012033
Subject(s) - water content , compact space , compaction , soil compaction , soil water , soil science , environmental science , content (measure theory) , dielectric , geotechnical engineering , materials science , mathematics , geology , mathematical analysis , optoelectronics , pure mathematics
Volumetric water content measurements based on soil dielectric properties are affected by soil compaction. Today’s commercial products produce substantial measurement error as they do not account for the influence of soil compaction. This paper presents a portable soil volumetric moisture content sensor based on the principle of standing wave rate and simultaneous soil compactness measurement. The coupling relationship between soil compactness and soil volumetric moisture content can be easily observed by converting them into polar coordinates. A modified soil volumetric moisture content model based on the soil compactness is also established to support the operation of the proposed sensor.