Fluid delivery

A flow control apparatus for fluid delivery comprising:

• a processor;
• memory in communication with the processor and storing instructions;
• tubing;
• a container in fluid communication with the tubing and adapted to store a fluid;
• and
• a pump motor operative, under control of the instructions executed by the processor, to create a suction force on a fluid in the container through the tubing to deliver a dose of the fluid from the container over a time interval, the dose comprising aliquots of the fluid deliverable over subintervals of the time interval,
• wherein the instructions, when executed by the processor are operative to cause the flow control apparatus to:
• operate, based on an objective volume of an aliquot to be delivered during a subinterval, the pump motor for a first motor duration at a beginning of the subinterval to deliver less than the objective volume of the aliquot;
• sense a change in a position of a first structure of the container relative to the position of a second structure of the container over the first motor duration;
• estimate a volume of fluid delivered over the first motor duration based on the sensed change in position;
• determine a second motor duration to deliver a remainder of the objective volume of the aliquot, the second motor duration ending no later than the end of the subinterval and being determined based on a difference between the objective volume of the aliquot and the estimated volume of the aliquot;
• and
• operate the pump motor for the second motor duration targeting delivery of the remainder of the aliquot.

A computer program product for controlling fluid delivery in a flow control apparatus, the flow control apparatus comprising a processor;

• memory in communication with the processor and storing instructions;
• tubing;
• a container in fluid communication with the tubing and adapted to store a fluid;
• and a pump motor operative, under control of the instructions executed by the processor, to create a suction force on a fluid in the container through the tubing to deliver a dose of the fluid from the container over a time interval, the dose comprising aliquots of the fluid deliverable over subintervals of the time interval, the computer program product comprising instructions that when executed by a processer are operative to cause the flow control apparatus to:
• operate, based on an objective volume of an aliquot to be delivered during a subinterval, the pump motor for a first motor duration at a beginning of the subinterval to deliver less than the objective volume of the aliquot;
• sense a change in a position of a first structure of the container relative to the position of a second structure of the container over the first motor duration;
• estimate a volume of fluid delivered over the first motor duration based on the sensed change in position;
• determine a second motor duration to deliver a remainder of the objective volume of the aliquot, the second motor duration ending no later than the end of the subinterval and being determined based on a difference between the objective volume of the aliquot and the estimated volume of the aliquot;
• and
• operate the pump motor for the second motor duration targeting delivery of the remainder of the aliquot.