Load weighing system for a heavy machinery

  • US 6,225,574 B1
  • Filed: 11/06/1998
  • Issued: 05/01/2001
  • Est. Priority Date: 11/06/1998
  • Status: Expired due to Term
First Claim
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1. A method of measuring the quantity of material delivered per cycle by large mining and hoisting machinery, the machinery having a device to hold the material to be delivered, the device being movable between loaded and unloading positions, said device being supported from a structure during movement between said positions, said method comprising determining the position of the device in respect to a selected location on said structure in the form of a processable position signal at a plurality of intervals during the movement of the device between said loaded and unloading positions, determining the load at a selected location within said structure where the load is related to the weight and position of the device and device contents in the form of a processable load signal at each said interval, processing said position and load signals for a plurality of interval determinations to provide a number of weight determinations of the device and device contents from the interval determinations made during said movement, selecting a sample of less than all of said weight determinations based upon the dynamic influences on the machinery when the signals are processed, some of the samples being excluded being those obtained at other than at the beginning and end of the movement of the device, and averaging said selected sample of weight determinations to provide a final determination of the weight of the device and device contents.

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