Detecting and measuring liquid flow in remote sewer structures
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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Abstract
In the particular embodiments described in the specification, a virtual sewer flow monitor detects flow rate and depth information periodically and supplies it to a scattergraph generator and a polynomial curve generator produces a polynomial curve corresponding to the scattergraph data. A filter eliminates polynomial curve portions corresponding to normal sewer flow conditions and an SSO detector responds to curve portions indicating a sewer overflow condition to generate an alarm.
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Citations
9 Claims
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1. A method for monitoring flow conditions in a sewer comprising
detecting 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. - View Dependent Claims (2, 3, 4)
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5. An arrangement for monitoring sewer flow conditions automatically comprising:
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a sewer pipe flow monitor for generating liquid depth versus flow rate data periodically; a scattergraph generator for generating a scattergraph from data produced by the sewer pipe flow monitor; a polynomial curve generator for generating a polynomial curve based on data in the scattergraph produced by the scattergraph generator; a detector for detecting an abnormal flow condition based on the configuration of the polynomial curve produced by the polynomial curve generator; and means for initiating further action based on the operation of the detector. - View Dependent Claims (6, 7, 8, 9)
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Specification