| dc.description.abstract | Reflectorless distance measurement
(REDM) was used to form various platforms in
specific total stations for engineering projects,
land surveys etc. It provided rapid measurement
by saving time and field hands for surveyors;
hence, the reliability of the measured distance
from an object has great importance. Also, it
increased personal safety without approaching
unsafe surfaces. This study aimed to investigate
the accuracy difference between the reflector
and reflectorless distance of the total station with
ten different materials and two different
environmental conditions. The study was
conducted outdoor using Sokkia SET530R and
Trimble M3 total stations. Ten different materials
were tested typically in construction fields. Two
different conditions were investigated, including
dry and wet targets. Two dissimilar incident
angles were also inspected, 000 and 300
respectively. The experiment was evaluated by
taking the reflector reading as true value to check
the accuracy of reflectorless measurement. It
concluded that Sokkia SET530R total station
gained deviations between 12-23 mm for all
conditions and incident angles. The Analysis of
Variance (ANOVA) tables proved that eight
materials were reflected with good accuracy
except for granite and plywood materials for the
Sokkia total station (P<0.05). In addition to that,
the results of all materials showed a deviation
between 5-8 mm for Trimble M3 total station at
an incident angle of 000 for both dry and wet
conditions. | en_US |
