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Device and method for weighing solid waste with an angle-correction scale

  • US 5,717,167 A
  • Filed: 01/24/1995
  • Issued: 02/10/1998
  • Est. Priority Date: 01/24/1995
  • Status: Expired due to Fees
First Claim
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1. Weighing apparatus having a device for correcting an error introduced in the weighing operation by an out-of-level condition, comprising:

  • scale means for weighing a load disposed thereon and providing a weight output signal proportional thereto;

    dual-axis clinometer means for detecting an out-of-level condition of said scale means and providing at least a first and a second angle signal respectively proportional to the out-of-level condition;

    conditioning means for receiving said first and second angle signals and generating a compensated angle output signal that is derived from a non-trigonometric function, wherein said conditioning means includes null means for receiving said first and second angle signals and generating corresponding first and second tilt signals, comparator means for receiving said first and second tilt signals, comparing said first and second tilt signals to a preselected error level, and generating an interrupt signal when either of said first and second tilt signals exceeds said preselected error level and generating first and second comparator signals whenever said first and second tilt signals are within said preselected error level, rectifier means for receiving said first and second comparator signals, converting said first and second comparator signals to their respective absolute values, and generating corresponding first and second rectified signals, and summation and adjustment means for summing said first and second rectified signals to each other to generate said compensated angle output signal;

    converter means for receiving said weight output signal and said compensated angle output signal wherein any out-of-level tilt imparted to said scale means causes a corresponding reduction in said weight output signal and a corresponding decrease in a nominal value of said compensated angle output signal, and wherein said converter means employs a ratio of said weight output signal to said compensated angle output signal to generate said output signal; and

    processor means for receiving said output signal and providing a visual indication of said output signal.

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