Abstract
This paper presents a resonance frequency tracking and measuring system for MEMS cantilever array sensors. A cell constitutes five micro-cantilevers driven by a piezoactuator, and the resonance signal of each micro-cantilever is read out by a Wheatstone bridge. An analog resonance circuit is developed to track all resonance frequencies. Meanwhile, a digital circuit base on Microcontroller Unit is utilized to measure the resonance frequency and processes the data. The developed system has a frequency capture range from 190 to 310 kHz. The measurement accuracy of the frequency measuring circuit is 0.3 Hz. Moreover, the frequency stability of micro-cantilever in this system can achieve 4 Hz. This system provides a promising approach to apply micro-cantilever array sensors in a portable instrument.
Original language | English |
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Pages (from-to) | 2013-2021 |
Number of pages | 9 |
Journal | Microsystem Technologies |
Volume | 23 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 Jun 2017 |
Externally published | Yes |