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Load measuring system for refuse trucks

  • US 5,245,137 A
  • Filed: 05/12/1992
  • Issued: 09/14/1993
  • Est. Priority Date: 12/21/1990
  • Status: Expired due to Fees
First Claim
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1. A method of determining a weight of material being emptied from a container wherein said container is lifted to and lowered from an emptying position in a lift, empty and lower cycle by an arm means, and wherein mounted on said arm means are at least one front and at least one rear first sensors having respective first outputs proportional to the weight of said container, said method comprising:

  • a) selecting at least one measurement position;

    b) calibrating said first sensors by recording at said measurement position said respective first outputs from each of said first sensors for both an empty arm means and for an arm means lifting and lowering a calibrating weight;

    c) subtracting from said respective first outputs recorded from said first sensors for said calibrating weight, the respective first outputs recorded from said first sensors for said empty arm means, at said measurement position, during both the lift and lower portion of the cycle and recording a difference;

    d) lifting, emptying and lowering an unknown load and recording said first outputs from each of said front and rear first sensors for each of said lifting and lowering portions of said cycle at said measurement position;

    e) subtracting from said output recorded during the lifting portion of said cycle, said output recorded during the lowering portion of said cycle, at said measurement position, to determine a change in output for each first sensor;

    f) computing from said change of output at said front and rear first sensors for said unknown weight and said change of output recorded for said front and rear first sensors of said calibrating weight, at said measurement position, the weight of material emptied from said container.

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