Method for measuring the weight of a suspended load

Details Method for measuring the weight of a suspended load Method for measuring the weight of a suspended load

G - Physics

01

G

G01G 9/00 (2006.01) B66C 13/16 (2006.01) E02F 9/20 (2006.01) G01G 19/14 (2006.01)

Patent

CA 2059011

Abstract of the Disclosure A method for measuring the weight of a suspended load, such as the bucket of a dragline, is disclosed. The method incorporates visual observations by a person such as a test engineer, or the operator of the dragline. During a dig cycle, once the steady state operation of the hoist is achieved, sampling of parameters such as hoist motor armature and field currents, and hoist and drag rope lengths, is performed. Using the calculated values of the force applied to the load and the geometry determined by the various rope lengths, the weight of the suspended load is calculated for each sample in the dig cycle. The calculated weight data may be accepted or rejected based upon the presence of dynamic factors observed by the test engineer or operator, or evident in the data. Calibration of certain values, such as the hoist efficiency, may take place on-site, rather than relying on theoretical or modeled values. If multiple hoist motors are used, data is sensed at each, and the hoist pull force applied by each individually calculated, for improved accuracy.

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