DIGITAL-CONTROLLED MEMS VIBRATORY-BEAM-ACCELEROMETER

被引：0

作者：

Fujita, Takayuki ^{[1
]}

Okada, Hiroki ^{[1
]}

Iguchi, Kaoru ^{[1
]}

Maenaka, Kazusuke ^{[1
]}

机构：

[1] Hyogo Med Univ, Grad Sch Engn, Hyogo, Japan

来源：

2008 WORLD AUTOMATION CONGRESS PROCEEDINGS, VOLS 1-3 | 2008年

关键词：

MEMS; vibratory beam accelerometer; VBA; digital PLL; FPGA;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This report provides a MEMS (micro-electromechanical systems) vibratory beam accelerometer (VBA) having a digital control system. The device structure with size of 5 x 5 mm(2) includes a frame, heavy mass, thick suspension beams, and thin vibrating beams made of silicon. The VBA measures acceleration using the resonant frequency change of the supporting beams, which are designed to provide little resistance to movement along the sensitive axis and stiff resistance on the off-axis. This provides low off-axis sensitivity and high shock survivability. In this study, we designed a fully digital PLL (phase-locked loop) circuitry in a FGPA (field programmable gate array) based hardware controller. By Allan deviation, we proved that our system has a resolution of 34 mu G Hz(-1/2) for a device operating at 1 mTorr.

引用

页码：149 / 154

页数：6

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