Microelectromechanical system gravimeters as a new tool for gravity imaging

Middlemiss, R. P. , Bramsiepe, S. G. , Douglas, R., Hild, S. , Hough, J., Paul, D. J. , Samarelli, A., Rowan, S. and Hammond, G. D. (2018) Microelectromechanical system gravimeters as a new tool for gravity imaging. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 376(2120), 20170291. (doi:10.1098/rsta.2017.0291) (PMID:29661979)

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Abstract

A microelectromechanical system (MEMS) gravimeter has been manufactured with a sensitivity of 40 ppb in an integration time of 1 s. This sensor has been used to measure the Earth tides: the elastic deformation of the globe due to tidal forces. No such measurement has been demonstrated before now with a MEMS gravimeter. Since this measurement, the gravimeter has been miniaturized and tested in the field. Measurements of the free-air and Bouguer effects have been demonstrated by monitoring the change in gravitational acceleration measured while going up and down a lift shaft of 20.7 m, and up and down a local hill of 275 m. These tests demonstrate that the device has the potential to be a useful field-portable instrument. The development of an even smaller device is underway, with a total package size similar to that of a smartphone.

Item Type:Articles
Keywords:General engineering, general physics and astronomy, general mathematics.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Bramsiepe, Mr Steven and Hammond, Professor Giles and Hild, Professor Stefan and Middlemiss, Dr Richard and Rowan, Professor Sheila and Samarelli, Mr Antonio and Paul, Professor Douglas and Hough, Professor James and DOUGLAS, Rebecca
Authors: Middlemiss, R. P., Bramsiepe, S. G., Douglas, R., Hild, S., Hough, J., Paul, D. J., Samarelli, A., Rowan, S., and Hammond, G. D.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Publisher:Royal Society
ISSN:1364-503X
ISSN (Online):1471-2962
Published Online:16 April 2018
Copyright Holders:Copyright © 2018 The Authors
First Published:First published in Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 376(2120):20170291
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher
Data DOI:10.5525/gla.researchdata.213

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
662111Monolithic Silicon Photonics Interferometer for Ultra-sensitive MEMS SensorsGiles HammondScience & Technology Facilities Council (STFC)ST/M000427/1S&E P&A - PHYSICS & ASTRONOMY
6672319UK Quantum Technology Hub in Enhanced Quantum ImagingMiles PadgettEngineering and Physical Sciences Research Council (EPSRC)EP/M01326X/1S&E P&A - PHYSICS & ASTRONOMY