K. Ohmiya et al., CONE RESISTANCE MEASURING SYSTEM FOR GENERATING CONE RESISTANCE DISTRIBUTION MAP, Journal of terramechanics, 30(3), 1993, pp. 181-190
To investigate soil physical conditions affected by soil compaction or
tillage. a computer controlled cone resistance measuring system and v
isualization software for generating cone resistance distribution maps
were developed. A cone resistance measuring system was developed so t
hat the coordinates of the measuring point were chosen at any location
in a 1.5 x 2 m horizontal x-y plane. Then, using this system, a serie
s of cone resistances with x, y, z coordinates was measured. A portabl
e computer was selected to measure and acquire the series of cone resi
stances. This computer was used to set the location of the cone, to op
erate a strain amplifier for measuring cone resistance and to measure
the location of data. The visualization software generates two- and th
ree-dimensional maps. x-z, y-z and x-y cross section are generated in
two-dimensional maps. Plane and view point may be selected from a thre
e-dimensional map. Using this system, cone resistance of 1.5 m width x
2.0 m length x 0.6 m depth in several fields was measured. Cone resis
tance distribution maps of two and three dimensions were generated by
the visualization software. It was concluded that two- and three-dimen
sional distribution maps gave us information that we could not obtain
from a map of one cross section.