Author: Cevat İNAL, Sercan BÜLBÜL
Publishing Date: 2015
Volume: 3 Issue: 1
Since the early 1970s, Electronic Distance Measurements (EDMs) have been widely used in the length measurements. To obtain accurate and reliable results from these instruments, EDM users must have a good knowledge about the measurement system and must take necessary precaution during measurement and calibration of EDMs should be done. In this context, the periodic determination of the zero addition error, scale coefficient error and phase difference measurement errors, which cause systematic error during length measurements, is important. These errors called as instrument parameters can be determined in control baseline which was set up for calibrations. The first control baseline, for determining instrument parameters, was set up in 1990 at the campus area of Selcuk University. But in 2010, this baseline had become disfunctioning because of construction of new roads and changes in campus plan. The new baseline was set up in 2010 to control and to calibrate the EDMs used by both government agencies and Selcuk University. The baseline has 6 points and 660 m of length. Up to now, the EDMs used by Konya, Karaman, Aksaray, Eskisehir, Afyon Cadastral Survey Directorates were controlled and calibrated in this baseline. In this study, the design and technical properties of this newly built baseline are presented. Beside, a program for determining the instrument parameters in the baseline at the campus area of Selcuk University, was prepared in Microsoft Excel 2007. With the prepared program, zero addition error, scale coefficient error and phase difference measurement error of EDMs can be determined and significance test can be made for determined parameters.
Key Words: Control, calibration, zero addition, scale coefficient, phase difference measurement function