Data processing: measuring – calibrating – or testing – Measurement system – Measured signal processing
Reexamination Certificate
2011-05-03
2011-05-03
Dunn, Drew A (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system
Measured signal processing
C702S150000, C356S614000
Reexamination Certificate
active
07937246
ABSTRACT:
Systems and methods for determining a trend in vertical track modulus are described. Vertical deflection data is collected along a particular section of railroad track. A first set of vertical track modulus is determined, based in part, on the collected vertical deflection data. At a second time, vertical deflection data is again collected along the particular section of railroad track to be used in determining a second set of vertical track modulus. At least the first and second sets of vertical track modulus are analyzed to determine a mathematical algorithm that facilitates developing a trend in the vertical track modulus of the railroad track.
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Farritor Shane Michael
Lu Sheng
Board of Regents of the University of Nebraska
Dunn Drew A
Faegre & Benson LLP
Vo Hien X
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