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Sensors 2012, 12(5), 5906-5918; doi:10.3390/s120505906
Article

An Alternative Approach to Control Measurements of Crane Rails

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Received: 29 March 2012 / Accepted: 23 April 2012 / Published: 8 May 2012
(This article belongs to the Section Physical Sensors)
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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 control measurements; crane rails; electronic tachymeter; “L” platform
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Marjetič, A.; Kregar, K.; Ambrožič, T.; Kogoj, D. An Alternative Approach to Control Measurements of Crane Rails. Sensors 2012, 12, 5906-5918.

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