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Nondestructive Analysis of Three‐dimensional Objects using a Fluid Displacement Method
Author(s) -
Jabro J. D.,
Iversen W. M.
Publication year - 2015
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj2015.06.0215
Subject(s) - displacement (psychology) , sample (material) , macropore , volume of fluid method , volume (thermodynamics) , soil science , surface tension , environmental science , materials science , chemistry , chromatography , physics , psychology , mesoporous material , biochemistry , quantum mechanics , psychotherapist , catalysis
Quantification of three‐dimensional (3‐D) objects has been a real challenge in agricultural, hydrological, and environmental studies. We designed and tested a method that is capable of quantifying 3‐D objects using measurements of fluid displacement. The device consists of a stand that supports a movable platform to which the sample is attached. The sample is lowered by measured increments into a vat of fluid. In the original model, as the sample was lowered the displaced fluid overflowed into a container on a scale that sent the weight to a computer. While this worked, the surface tension limited accuracy and it was very slow. To improve the process, the fluid was contained and the fluid level was measured with a linear variable displacement transformer. The displaced fluid volume for each increment and the immersion depth is recorded by a data logger. The surface area of the fluid is reduced as the sample is immersed, so calculations are performed to account for this change. The apparatus was built to facilitate the characterization of three dimensional objects for shape and volume comparisons. It has numerous agricultural and environmental applications. It has been used at our location to quantify the size and length of soil macropores in field soils. It has also been used to numerically evaluate the taper of sugarbeet ( Beta vulgaris L.) roots. The apparatus produces good estimates for both aforementioned soil and plant applications.