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2006
Conference Paper
Titel
Development of a peristaltic micro-pump based on PZT bending actuators
Abstract
This paper reports about the development of a piezoelectric micro-pump working on the peristaltic principle as it is known from the human gut and oesophagus. The proposed driving mechanism is an active tube made of a composite structure of active and passive materials. Our investigations are focusing on two principle applications: an implantable infusion pump for controllable drug dosage and a micro-pump for manufacturing processes in micro systems technology. Specifications include a target dosage of 1 to 15 µl per cycle which is to be realized with an active tube of 25 x 15 x 5 mm3 and a maximum allowable actuation voltage of 60 V. Different compositions of the active tube, using the piezoelectric transverse (d31) or the longitudinal (d33) mode, were numerically investigated and evaluated. On the basis of these results improved materials and material set-ups are proposed. The final objective of the project is the realization of a fully functioning prototype.