Data processing: measuring – calibrating – or testing – Measurement system – Weight
Reexamination Certificate
2005-10-11
2008-09-30
Cosimano, Edward R (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Weight
C177S001000, C177S025110, C177S025120, C177S132000, C177S136000, C702S127000, C702S173000, C702S174000
Reexamination Certificate
active
07430491
ABSTRACT:
A method and system for estimating weight of a trailer (10) being towed by a tractor (22) along a generally horizontal underlying surface. A portion of the trailer weight is borne on the tractor fifth wheel (26) and the remainder by rear wheels (18) rolling on the underlying surface. The tractor accelerates the trailer from an initial velocity to a final velocity over a time interval that is measured by a timer. The force that the tractor needed to exert on the trailer in order to change the velocity is also measured. Various data, including that force, are processed according to an algorithm to calculate the weight of the trailer by itself. Other data processed includes data (N0) representing the portion of the weight of the trailer borne through the tractor, data representing the change in velocity of propulsion (□v), data representing length of the interval of time (t), and data (μk) representing coefficient of friction of the wheels (18) with the underlying surface.
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Carlson Bradley S.
Gutierrez Francisco A.
Askew Gerald W.
Calfa Jeffrey P.
Cosimano Edward R
International Truck Intecllectual Property Company, LLC
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