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Compensating liquid delivery system and method

  • US 20060181695A1
  • Filed: 02/11/2005
  • Published: 08/17/2006
  • Est. Priority Date: 02/11/2005
  • Status: Abandoned Application
First Claim
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1. A system for supplying fluids at selected rates comprising a conduit along which fluid flows, the conduit having an interrogation region with at least one predetermined geometrical or flow characteristic, a pump adapted to move a nominal volume of fluid along the conduit with each pumping action, a pump driver for causing the pump to perform pumping actions at nominal selected times, the nominal selected times corresponding to a user selectable fluid supply rate, a sensor for measuring at least one property of flow of the fluid at the interrogation region, a processor for calculating an actual supplied volume of fluid from each pumping action based on at least one property of fluid flow measured by the sensor and the geometric or flow property of the interrogation region, for calculating an actual supply rate based on the calculated actual supplied volume of fluid and the selected times, for comparing the actual supply rate and the selected supply rate, and for calculating new actuation times for the pump when the actual and selected supply rate are different such that the supply rate based on the new actuation times and actual supplied volume more nearly matches the selected supply rate.

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