| 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 |
