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An Alternative Approach to Control Measurements of Crane Rails
Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova 2, 1000 Ljubljana, Slovenia
* Author to whom correspondence should be addressed.
Received: 29 March 2012 / Accepted: 23 April 2012 / Published: 8 May 2012
Abstract: Horizontal and vertical positions of points for the control assessment of crane rails are classically determined separately. The procedure is time consuming and causes non-homogenous accuracy of the horizontal and vertical position of control points. The proposed alternative approach is based on polar measurements using a high accuracy total station instrument and a special platform with two precise surveying prisms fixed on it. Measurements are carried out from a single station thus ensuring a common coordinate system and homogenous accuracy. The position of the characteristic point of a rail is derived from the measured positions of both prisms with known geometry of the platform. The influence of platform non-horizontality is defined, along with its elimination procedure. Accuracy assessment is ensured with redundant measurements. Result of the proposed procedure is a numerical and graphical presentation of characteristic points. The control parameters required in international Eurocode standards are easily determined from them.
Keywords: control measurements; crane rails; electronic tachymeter; “L” platform
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MDPI and ACS Style
Marjetič, A.; Kregar, K.; Ambrožič, T.; Kogoj, D. An Alternative Approach to Control Measurements of Crane Rails. Sensors 2012, 12, 5906-5918.
Marjetič A, Kregar K, Ambrožič T, Kogoj D. An Alternative Approach to Control Measurements of Crane Rails. Sensors. 2012; 12(5):5906-5918.
Marjetič, Aleš; Kregar, Klemen; Ambrožič, Tomaž; Kogoj, Dušan. 2012. "An Alternative Approach to Control Measurements of Crane Rails." Sensors 12, no. 5: 5906-5918.