System and method for operation of a pump
Systems and methods for monitoring operation of a pump, including verifying operation or actions of a pump, are disclosed. A baseline profile for one or more parameters of a pump may be established. An operating profile may then be created by recording one or more values for the same set of parameters during subsequent operation of the pump. A value for a goodness of fit measure comparing the operating profile and baseline profile can be established. If the goodness of fit measure is insufficient, an alarm may be sent or another action taken, for example the pumping system may shut down, etc. An example goodness of fit measure is an R-squared measure.
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.
2. The system of claim 1 , wherein the parameter comprises one or more of motor speed, motor current, or motor position.
3. The system of claim 1 , wherein the set of points comprises a set of points collected over a segment of the operation.
4. The system of claim 3 , wherein the controller is further operable to compare the value of the overall goodness of fit measure to an overall goodness of fit threshold.
5. The system of claim 1 , wherein the overall goodness of fit measure is an R-Squared measure.
6. The system of claim 1 , wherein the at least one goodness of fit measure comprises a goodness of fit measure for a portion of the operating profile.
7. The system of claim 6 , wherein the controller is further operable to compare the value of the goodness of fit measure for the portion of the operating profile to a goodness of fit threshold for that portion.
8. A method for monitoring operation of a multi-stage pump using a non-transitory, tangible computer readable medium storing a set of computer instructions, comprising:
establishing a baseline profile for a measured parameter of the multi-stage pump associated with a recipe, the multi-stage pump having a chamber, a barrier valve upstream to the chamber, and an outlet valve downstream from the chamber;
creating an operating profile for the measured parameter associated with the 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 determining 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;
comparing the operating profile for the parameter associated with the recipe to the baseline profile for the parameter associated with the recipe to determine a value for at least one goodness of fit measure 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;
determining 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, generating an alarm.
9. The method of claim 8 , wherein the parameter comprises one or more of motor speed, motor current, or motor position.
10. The method of claim 8 , wherein the set of points comprises a set of points collected over a segment of the operation.
11. The method of claim 8 , wherein the at least one goodness of fit measure comprises an R-squared measure.
12. The method of claim 11 , wherein the parameter comprises one or more of motor speed, motor current, or motor position.
13. The method of claim 8 , wherein the controller is further operable to compare the value of the overall goodness of fit measure to an overall goodness of fit threshold.
14. The method of claim 8 , wherein the at least one goodness of fit measure comprises a goodness of fit measure for a portion of the operating profile.
15. The method of claim 14 , wherein the controller is further operable to compare the value of the goodness of fit measure for the portion of the operating profile to a goodness of fit threshold for that portion.
16. A computer program product comprising a non-transitory, tangible computer readable medium storing a set of computer instructions, the computer instructions comprising instructions executable to:
establish a baseline profile for a measured parameter of a multi-stage pump associated with a recipe, the pump having a chamber, a barrier valve upstream to the chamber, and an outlet valve downstream from the chamber, 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, wherein each recipe of the plurality of recipes is associated with a baseline profile;
create an operating profile based on one or more measurements corresponding to the parameter, the creating the operating profile comprising determining a value of the parameter at each point of a set of points during an operation of the multi-stage pump from a sensor, when the pump is operated according to the recipe;
compare the operating profile for the parameter associated with the recipe to the baseline profile for the parameter associated with the recipe to determine a value for at least one goodness of fit measure that provides a statistical measure how well the baseline profile predicts the operating profile, the at least one goodness of fit measure comprising an overall goodness of fit measure; and
determine if the at least one goodness of fit measure for the operating profile is within a predetermined range.
17. The computer program product of claim 16 , wherein the parameter comprises one or more of motor speed, motor current, or motor position.
18. The computer program product of claim 16 , wherein the at least one goodness of fit measure comprises an R-squared measure.
19. The computer program product of claim 18 , wherein the parameter comprises one or more of motor speed, motor current, or motor position.
20. The computer program product of claim 16 , wherein the at least one goodness of fit measure comprises a goodness of fit measure for a portion of the operating profile.
21. The computer program product of claim 20 , wherein the controller is further operable to compare the value of the goodness of fit measure for the portion of the operating profile to a goodness of fit threshold for that portion.