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Detecting and measuring liquid flow in remote sewer structures

  • US 5,942,698 A
  • Filed: 11/19/1997
  • Issued: 08/24/1999
  • Est. Priority Date: 11/19/1997
  • Status: Expired due to Term
First Claim
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1. A method for monitoring flow conditions in a sewer comprisingdetecting periodically the flow rate and water level at a selected location in the sewer;

  • generating a scattergraph of the flow rate and water level data detected over a period of time;

    generating at least one polynomial curve based on the scattergraph data;

    automatically detecting an abnormal flow condition from the polynomial curve; and

    initiating action upon detection of an abnormal flow condition.

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