Patent ID: 9631611
Date: 2017-04-25
CPC Classifications: F04B

Claim:
1. A system for monitoring operation of a pump, comprising: a multi-stage pump having a chamber, a barrier valve upstream to the chamber, and an outlet valve downstream from the chamber; a pressure sensor coupled to the multi-stage pump to measure the pressure of a fluid within the chamber; and a pump controller coupled to the multi-stage pump and the pressure sensor to control the pressure of the fluid at the pump, the pump controller operable to: create an operating profile for a measured parameter of the pump associated with a recipe, wherein the recipe is one of a plurality of recipes stored in the controller, each recipe defining a sequence of operation of a plurality of valves or one or more motors of the multi-stage pump to dispense fluid from the multi-stage pump and each recipe of the plurality of recipes being associated with a baseline profile, and wherein the creation of the operating profile comprises recording a value of the parameter at each point of a set of points during the operation of the multi-stage pump when the multi-stage pump is operated according to the recipe; compare the operating profile for the measured parameter associated with the recipe to the baseline profile for the parameter associated with the recipe to generate at least one goodness of fit measure for the operating profile that provides a statistical measure of how well the baseline profile predicts the operating profile, the at least one goodness of fit measure comprising an overall goodness of fit measure; determine if the at least one goodness of fit measure for the operating profile is within a predetermined range; and if the at least one goodness of fit measure is not within the predetermined range, generate an alarm.