Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 67, Issue 11, Pages 9833-9840Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2019.2956377
Keywords
Switches; Electrodes; Micromechanical devices; Sensors; Bifurcation; Electrostatic levitation; Electrostatic levitation; microelectro-mechanical systems (MEMS); pressure switch; sensors
Categories
Funding
- National Science Foundation Division of Electrical, Communications, and Cyber Systems [1608692]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1608692] Funding Source: National Science Foundation
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In this article, we demonstrate a tunable air pressure switch. The switch detects when the ambient pressure drops below a threshold value and automatically triggers without the need for any computational overhead to read the pressure or trigger the switch. The switch exploits the significant fluid interaction of a microelectro-mechanical systems beam undergoing a large oscillation from electrostatic levitation to detect changes in ambient pressure. If the oscillation amplitude near the resonant frequency is above a threshold level, dynamic pull-in is triggered and the switch is closed. The pressure at which the switch closes can be tuned by adjusting the voltage applied to the switch. The use of electrostatic levitation allows the device to be released from their pulled-in position and reused many times without mechanical failure. A theoretical model is derived and validated with experimental data. It is experimentally demonstrated that the pressure switching mechanism is feasible.
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