Method and system for shape-memory alloy wire control

摘要

A method for controlling a device using a shape-memory alloy wire is disclosed. The method includes determining an ontime for the shape-memory alloy wire based on a target volume to be pumped by a pump plunger, determining the temperature of the shape-memory alloy wire and adjusting the ontime based on the temperature of the shape-memory alloy wire.

主权项

1. A method for controlling a device using a shape-memory alloy wire comprising:
a controller determining an ontime for the shape-memory alloy wire in the device based on a target volume to be pumped by a pump plunger in the device; the controller determining a temperature of the shape-memory alloy wire; the controller adjusting the ontime for the shape-memory alloy wire based on the temperature of the shape-memory alloy wire; actuating the shape-memory alloy wire to effectuate the pumping of a volume of fluid by the pump plunger from a reservoir to a volume sensor chamber; measuring the volume of fluid pumped using a volume sensor assembly; determining the difference between the target volume and the volume of fluid pumped; and if the volume of fluid pumped is greater than or less than the target volume, updating the ontime.