View : 24 Download: 0

A solid hydraulically amplified piezoelectric microvalve

Title
A solid hydraulically amplified piezoelectric microvalve
Authors
Wu X.Kim S.-H.Ji C.-H.Allen M.G.
Ewha Authors
지창현
SCOPUS Author ID
지창현scopus
Issue Date
2011
Journal Title
Journal of Micromechanics and Microengineering
ISSN
0960-1317JCR Link
Citation
vol. 21, no. 9
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We report a piezoelectrically driven and hydraulically amplified axial polymer microvalve. The microvalve is normally open and is assembled primarily with stereolithographically fabricated polymer components. An incompressible elastomer is used as a solid hydraulic medium to convert the small axial displacement of a piezoelectric actuator into a large valve head stroke while maintaining a large blocking force. Also, the axial design of the microvalve enables densely packed valve arrays. One application of this microvalve is in pneumatic tactile displays, which operates against gas pressure up to approximately 90 kPa and switching speed between 1 and 200 Hz. The current valve design has a maximum static hydraulic amplification ratio of 5 at 30 V driving voltage and a maximum valve head stroke of 37 νm at 150 V. Under a 94.4 kPa differential pressure, the flow rate of the valve and the closing voltage measure are 785 mL min -1 and 150 V, respectively. The function of the microvalve as an on-off switch for a pneumatic microbubble tactile actuator is demonstrated. © 2011 IOP Publishing Ltd.
DOI
10.1088/0960-1317/21/9/095003
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE