Preliminary conclusions on application of ultrasonic sensors in evaluation of distribution and depth of ruts in forest thinning
Laen...
Kuupäev
2018
Kättesaadav alates
Autorid
Pužuls, K.
Štāls, T.
Zimelis, A.
Lazdiņš, A.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
The scope of the study is to elaborate equipment for measurement of ruts during log
forwarding. The
system is supposed to be used in practical forestry to replace manual
measurement of length of deep ruts and to provide spatially explicated information on soil bearing
capacity, which can be used in planning of forest operations.
A set of 4 pairs of ultra
sonic sensors were installed on front and rear bunks to measure distance
to the ground at 90
o
angle (in front and behind the wheels in each side of forwarder) and at certain
angle to measure distance to the ground outside strip
-
road. Measurement data are s
ent to the
logger, where they are stored in .csv files. Wired connection between the sensors and the logger
was used in earlier version, but later replaced with wireless connection. Depth of rut is calculated
using formula for calculation of length of cath
etus of a right
-
angled triangle. Data processing in
spreadsheet includes initial identification of error values and calculation of depth of ruts. Further
spatial data analysis is done in GIS software.
According to the study results ultrasonic sensors provi
des sufficient accuracy to characterize
depth of ruts in 1...5
m long segments of strip
-
roads, including dynamic data on depth and length
of ruts after each pass. However, the accuracy is insufficient to compare measurements from
sensors mounted on front a
nd rear bunks, as well as on left and right side of machine, therefore it
is enough to have 2 pairs on sensors on rear bunks.
Kirjeldus
Article
Märksõnad
ultrasonic sensors, rut depth, harvesting, articles