加速度计
微电子机械系统
宽带
灵敏度(控制系统)
噪音(视频)
噪声地板
声学
电子工程
计算机科学
微震
电气工程
工程类
噪声测量
材料科学
物理
降噪
电信
光电子学
操作系统
图像(数学)
土木工程
人工智能
作者
Jérôme Laine,D. Mougenot
出处
期刊:The leading edge
[Society of Exploration Geophysicists]
日期:2014-11-01
卷期号:33 (11): 1234-1242
被引量:68
标识
DOI:10.1190/tle33111234.1
摘要
A new generation of accelerometers based on a microelectromechanical system (MEMS) can deliver broadband (0 to 800 Hz) and high-fidelity measurements of ground motion even at a low level. Such performance has been obtained by using a closed-loop configuration and a careful design which greatly mitigates all internal mechanical and electronic noise sources. To improve the signal-to-noise ratio toward the low frequencies at which instrument noise increases, a new MEMS has been developed. It provides a significantly lower noise floor (at least −10 dB) and thus a higher dynamic range (+10 dB). This performance has been tested in an underground facility where conditions approach the minimum terrestrial noise level. This new MEMS sensor will even further improve the detection of low frequencies and of weak signals such as those that come from deep targets or from microseismic events.
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