Dimension measuring system using track reference targets to define left and right top-of-rail elevations
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United States of America Patent
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May 29, 2018
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app pub date -
Jul 26, 2017
filing date -
May 28, 2014
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Abstract
A dimension measuring system includes a target positioning system mounted on a railroad track's parallel rails. The target positioning system includes two targets positioned at fixed positions in a first plane perpendicular to the rails, and another two targets positioned at fixed positions in a second plane perpendicular to the rails and spaced-apart from the first plane. A laser-based distance measuring device measures vector distances to the four targets. A processor, coupled to the laser-based distance measuring device, determines an elevation of each of the rails in the first plane and second plane using the vector distances and the fixed positions of the targets in the first and second planes. The elevation of each the rails in the first and second planes define a top-of-rail reference plane used by the processor when dimensions of an object above the top-of-rail reference plane are to be measured.
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