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In this paper a prototype of an intelligent micropump is presented. The electrical parameters of the micropump are regulated by measuring the actual flow rate with an integrated thermal flow sensor. The micropump moves liquids with a regulated flow rate with a range of 100 μl/min to several ml/min. The accuracy is better than 10%. The micropump and flow sensor are controlled via integrated...
Steady-state electrohydrodynamic micropumping through bipolar conduction phenomenon has been investigated experimentally and numerically. A single-stage axisymmetric conduction micropump in the vertical configuration has been proposed in this paper. This micropump consists of four components: high voltage ring electrode, grounded disk-shaped electrode, insulator spacer, and inlet/outlet ports. The...
Due to the very small size of the mouse inner ear, 600 nL volume, developing effective, controlled infusion systems is quite challenging. Key technologies have been created to minimize both size and power for an implantable pump for murine intracochlear infusions. A method for coupling fine capillary tubing to microfluidic channels is presented which provides low volume, biocompatible interconnects...
In this work, a micro electrohydrodynamical (EHD) gas pump using a needle-cylindrical electrode system was constructed for an application of ionic wind to fluid flow operations without mechanical parts. The experimental EHD pump was consisted of a tapered glass tube (2 to 10 mm in inner diameters, 45 mm in an axial length) attached with the electrode system, where the needle electrode (1 mm in a diameter,...
This paper proposes a new valve-less pump with cross-junction channels and integrated hotwires. The pump was actuated by PZT diaphragm to create a gas jet flow for fluidic application. The design and simulation are based on transient fluidic analysis with experimental result of PZT diaphragm so that features of micropump is predicted with high reliability. Two designs of the pumps with different nozzles...
In the fields of Biomedical Engineering, a new type of micropump that can supply micro liquid flow continuously has urgently been demanded. Some researchers have proposed several kinds of micropump, but the types of their output are mostly pulsatile. These types of output mode make some difficulties in flow rate measuring and controlling. Therefore, it is our purpose to develop a novel type of pulseless...
An elliptical, electroosmosis device, with many micro channel flow paths has been designed to circulate liquid to cool hot spots on a microprocessor chip. A pair of electrodes deposited 3 mm apart, across the channels, was employed to impose external electric potential. A preliminary experimental setup has been fabricated to determine the flow rate and heat transfer of the micro channel device. A...
As an evangel to diabetics, the invention of insulin pump has drastically renovated the ways of treatment for diabetes. Having been developing since 1970s, insulin pump is an advanced product now. However, the insulin pump in the market is still far from being satisfactory, as pains were caused to patients out of the injection and finger blood extraction. Even worse, if insulin is over injected, the...
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