A 19 day earth tide measurement with a MEMS gravimeter.

A 19 day earth tide measurement with a MEMS gravimeter.
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DOI:
10.1038/s41598-022-16881-1
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发表时间:
2022-07-29
期刊:
影响因子:
4.6
通讯作者:
Hammond, Giles D.
Hammond, Giles D.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Prasad, Abhinav;Middlemiss, Richard P.;Noack, Andreas;Anastasiou, Kristian;Bramsiepe, Steven G.;Toland, Karl;Utting, Phoebe R.;Paul, Douglas J.;Hammond, Giles D.

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通过测量局部重力的微小变化,可以观察到地下的特征。重力仪在历史上一直是非常昂贵的仪器,但最近使用MEMS(微机电系统)传感器进行了可用的重力测量。这种传感器的生产成本很低,因为它们依赖于与生产手机加速度计相同的制造技术。MEMS重力仪发展的一个重大挑战是保持长时间的稳定性,这对于长期监测应用至关重要。证明重力仪稳定性和灵敏度的一个标准方法是测量由于潮汐力(地球潮汐)引起的地球周期性弹性变形。这里给出了一个19天的地球潮汐测量值,与理论信号的相关系数为0.975。这一结果表明,该MEMS重力仪能够进行长期延时重力测量,这是火山学等应用必不可少的功能。
The measurement of tiny variations in local gravity enables the observation of subterranean features. Gravimeters have historically been extremely expensive instruments, but usable gravity measurements have recently been conducted using MEMS (microelectromechanical systems) sensors. Such sensors are cheap to produce, since they rely on the same fabrication techniques used to produce mobile phone accelerometers. A significant challenge in the development of MEMS gravimeters is maintaining stability over long time periods, which is essential for long term monitoring applications. A standard way to demonstrate gravimeter stability and sensitivity is to measure the periodic elastic distortion of the Earth due to tidal forces—the Earth tides. Here, a 19 day measurement of the Earth tides, with a correlation coefficient to the theoretical signal of 0.975, has been presented. This result demonstrates that this MEMS gravimeter is capable of conducting long-term time-lapse gravimetry, a functionality essential for applications such as volcanology.
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