| Microfluidic pumps are used for biomedical applications. Typically, they are composed of a piezoelectric membrane which is stimulated to pulsate with an applied voltage waveform. The result is a device that can pump small amounts of fluids, typically for administration of pharmaceutical products, or for use in laboratories. The problem with microfluidic pumps is that they generally run "open-loop". This means that when problems arise (such as blockages), the pump control system cannot detect them. In this research program, undertaken by Mr. Tom Tomac as part of his Doctoral studies, the objective was to characterise the open-loop performance of a micro-pump. Subsequently, a closed loop control system was developed to provide a more consistent and stable pump performance that could detect irregularities, and also handle inconsistencies in the fluid media that was being pumped. The research was undertaken in collaboration with the Cooperative Research Centre for Microsystems Technology. |
Click On Image for Larger View
Doctortee.net
Closed Loop Control of Microfluidic Pump