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Fluid flow resistance monitoring system

  • US 6,416,291 B1
  • Filed: 06/23/2000
  • Issued: 07/09/2002
  • Est. Priority Date: 07/30/1996
  • Status: Expired due to Term
First Claim
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1. A method for monitoring a flow parameter in a fluid delivery system in which a flow control device acts on a fluid conduit to control the flow of fluid through the conduit, the method comprising the steps of:

  • outputting a pseudorandom code;

    controlling the flow control device to act on the fluid conduit to cause a pattern of flow variation in the conduit in accordance with the pseudorandom code;

    monitoring pressure of the fluid in the conduit and generating pressure signals representing said monitored pressure;

    determining average pressure values for at least some of the pressure signals;

    decoding the average pressure values in accordance with the pseudorandom code; and

    processing the decoded average pressure values to determine the flow parameter.

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