DefinePK

Abstract

The aim of the study is plane laser system precision detection as direct leveling means. Two goals have been put forward in order to achieve the aim of the study: to detect the staff reading precision by naked eye using laser level horizontal light trail and reveal reading error type of the dependence from the distance to the rod. The research has been done using optical tilting level H-05, laser levels: Condtrol Xliner combo and ADA 6D Servo Liner. The distance between devices and the levelling staff have been measured every 1-3 m, maximum distance is 25 m. The staff has been put in vertical position by a circular bubble. The staff readings have been taken with 1 mm precision. Rod’s height has been randomly changed 10 times at every distance. The research results have demonstrated that the dependence of rod reading mean squared error (MSE) from the distance between the device and the rod does not follow theoretically established linear law, but possesses wavelike properties. The smallest error values have been recorded at the distance of 13 - 15 m, local maximums have made 4-5 m and 22-25 m from the device to the rod.