Rolling wheel deflectometer
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United States of America Patent
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Aug 15, 2017
Grant Date -
Aug 27, 2015
app pub date -
Jun 14, 2012
filing date -
Jun 14, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A method and an apparatus for rolling wheel deflection measurement are disclosed. The apparatus includes a rolling wheel to be moved along a measuring surface in a first direction; a frame extending essentially along the measuring surface in the first direction from at least the rolling wheel; four spaced apart range sensors; a scanner for scanning in a first time interval a number of lines using each of the range sensors, so as to get a corresponding number of virtual images, in which the pixel values represent distances; and a data processor adapted for comparing and matching the virtual images, so as to identify corresponding regions, and for calculating a deflection value using matched pixel values of virtual images from the virtual images based on the identification corresponding regions.
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