MEMS Gravity Sensors for Imaging Density Anomalies

Noack, A., Middlemiss, R. , Prasad, A. and Hammond, G. (2018) MEMS Gravity Sensors for Imaging Density Anomalies. In: Optical Trapping and Optical Micromanipulation XV, San Diego, CA, USA, 19-23 Aug 2018, 107230J. ISBN 9781510620179 (doi:10.1117/12.2323969)

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Abstract

Gravimeters measure small changes in the local gravitational acceleration. They are applied for environmental monitoring, oil and gas prospecting and defence and security. Gravimeters used in these applications have a remarkable sensitivity but at a cost of being bulky and very expensive. Recently, a micro-electrical mechanical system (MEMS) gravimeter has been developed, which was cheap, had a comparable sensitivity to commercial gravimeters and maintained its stability over long timescales (10−6 Hz). In this paper we discuss to replace the current shadow sensor readout with an on-chip interferometer. This new readout has a higher sensitivity so that the device can be more robust and reduces the system size. The design of this readout is discussed and the first experimental results are presented. The new readout improves the imaging capabilities of density anomalies of the device.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hammond, Professor Giles and Middlemiss, Dr Richard and Prasad, Dr Abhinav and Noack, Andreas
Authors: Noack, A., Middlemiss, R., Prasad, A., and Hammond, G.
College/School:College of Science and Engineering > School of Physics and Astronomy
ISSN:0277-786X
ISBN:9781510620179
Copyright Holders:Copyright © 2018 SPIE
First Published:First published in Proceedings of SPIE 10723: 107230J
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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