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Method of controlling a mobile pugmill having a weight metering control system

  • US 6,036,353 A
  • Filed: 02/16/1999
  • Issued: 03/14/2000
  • Est. Priority Date: 01/29/1996
  • Status: Expired due to Fees
First Claim
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1. A method of controlling a blending and mixing plant comprising the steps of:

  • a) providing an ideal aggregate flow rate;

    b) providing an ideal additive percentage set point;

    c) sending the ideal aggregate flow rate to an aggregate process controller;

    d) receiving a current aggregate flow rate signal from an aggregate sensor;

    e) comparing the ideal aggregate flow rate to the current aggregate flow rate in the aggregate process controller;

    f) calculating the ideal additive flow rate from the additive percentage set point and the current aggregate flow rate;

    g) changing the current aggregate flow rate by sending an aggregate output signal from the aggregate process controller to an aggregate dispenser;

    h) sending the ideal additive flow rate to an additive process controller;

    i) receiving a current additive flow rate signal from an additive sensor;

    j) comparing the ideal additive flow rate to the current additive flow rate in the additive process controller;

    k) changing the current additive flow rate by sending an output signal from the additive process controller to an additive dispenser; and

    l) repeating steps c-k at predetermined intervals.

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