用MEMS重力计测量地球的潮
R P Middlemiss1,2, A Samarelli1, D J Paul2
1Scottish Universities Physics Alliance (SUPA), University of Glasgow, School of Physics and Astronomy, Kelvin Building, University Avenue, Glasgow G12 8QQ, UK.
Nature
|April 1, 2016
概括
我们开发了一种新的微电力系统 (MEMS) 引力计, 这一突破将MEMS加速度计转化为各种地质应用的敏感重力计.
科学领域:
- 地质学
- 传感器技术
- 微电机系统 (MEMS)
背景情况:
- 精确测量引力加速变化对于检测碳化合物储量,监测火山活动和识别地下结构至关重要.
- 现有的重力计 (自由落体,弹式,超导,原子干扰计) 达到必要的灵敏度 (几十微加尔/Hz^{1/2)),但成本高 (超过10万美元) 和重量大 (超过8公斤).
- 这些设备可以测量地球的潮,这是一个可预测的引力信号,需要高灵敏度和长期稳定性.
研究的目的:
- 介绍一个新的微电机系统 (MEMS) 装置,
- 展示设备在测量地球潮的能力, 展示其稳定性.
- 为了突出一个低成本,小型化的重力计的潜力,
主要方法:
- 开发了一种微电机系统 (MEMS) 装置,其灵敏度为40微加尔/Hz^{1/2).
- 使用MEMS设备长时间测量地球的潮.
- 将开发的MEMS重力计与现有MEMS加速计的长期稳定性进行比较.
主要成果:
- 开发的MEMS设备的灵敏度为40微加尔/Hz^{1/2},并且在几立方厘米内运行.
- 该仪器成功测量了地球的潮,与其他MEMS设备相比,它具有优越的长期稳定性.
- 这项研究成功地将MEMS加速度计转化为功能性重力计.
结论:
- 与传统仪器相比,新型MEMS重量计提供了高灵敏度和稳定性,成本和尺寸显著降低.
- 这种微型且负担得起的技术为重力测绘和探索开辟了新的途径.
- 潜在的应用包括基于无人机的土地测量,火山监测和多像素重力成像阵列.
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