Microelectromechanical system gravimeters as a new tool for gravity imaging

Middlemiss, Richard; Bramsiepe, Steven G.; Douglas, R.; Hild, S.; Hough, J.; Paul, Douglas J.; Samarelli, Antonio; Rowan, S.; Hammond, G.

doi:10.1098/rsta.2017.0291

Cited by 12 publications

(9 citation statements)

References 34 publications

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“…Such significant improvements in the set-up have helped in making the platform small and low-cost. Several measurements using the integrated platform have been reported recently which demonstrate the field portability of the platform [16,17].…”

Section: Sensor Description and Assembly Of The Mems Gravimeter Pmentioning

confidence: 98%

A Portable MEMS Gravimeter for the Detection of the Earth Tides

et al. 2018

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Gravimeters are used for measuring the local gravitational acceleration. The use of current commercially available gravimeters, however, has been limited by their high cost and large size. In this study, a microelectromechanical system (MEMS) based relative gravimeter with an acceleration sensitivity of 8 µGal/ √ (Hz) is demonstrated. The MEMS gravimeter, along with the custom interface electronics, is embedded on a battery powered portable platform. The portable platform enables continuous recording of the sensor response, while simultaneously measuring critical temperature and tilt parameters. To demonstrate the long-term stability of the system, the reported MEMS gravimeter platform was used to detect the Earth tides. In this paper, the first results from these measurements have been discussed.

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Section: Sensor Description and Assembly Of The Mems Gravimeter Pmentioning

confidence: 98%

A Portable MEMS Gravimeter for the Detection of the Earth Tides

et al. 2018

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“…In this way, it is even possible to measure signals with frequency in the order of 10−5 Hz. Such conceived sensors have been able to detect the Earth tides [108,109], and experimental field tests confirmed the possibility to used them as portable devices for gravity imaging [110,111].…”

Section: Application Of Capacitive Mems Accelerometers To Seismologymentioning

confidence: 99%

A Review of the Capacitive MEMS for Seismology

D’Alessandro

Scudero

Vitale

2019

Sensors

104

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MEMS (Micro Electro-Mechanical Systems) sensors enable a vast range of applications: among others, the use of MEMS accelerometers for seismology related applications has been emerging considerably in the last decade. In this paper, we provide a comprehensive review of the capacitive MEMS accelerometers: from the physical functioning principles, to the details of the technical precautions, and to the manufacturing procedures. We introduce the applications within seismology and earth sciences related disciplines, namely: earthquake observation and seismological studies, seismic surveying and imaging, structural health monitoring of buildings. Moreover, we describe how the use of the miniaturized technologies is revolutionizing these fields and we present some cutting edge applications that, in the very last years, are taking advantage from the use of MEMS sensors, such as rotational seismology and gravity measurements. In a ten-year outlook, the capability of MEMS sensors will certainly improve through the optimization of existing technologies, the development of new materials, and the implementation of innovative production processes. In particular, the next generation of MEMS seismometers could be capable of reaching a noise floor under the lower seismic noise (few tenths of ng/ H z ) and expanding the bandwidth towards lower frequencies (∼0.01 Hz).

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“…Power constraints and the large Mars ambient diurnal temperature range prevent active thermal control (e.g. [5] [6]). To this end, a wind and thermal shield (WTS) will be placed on top of the seismometer to attenuate the wind, pressure and thermal contribution to the signal [7] [8] [9].…”

Section: Introductionmentioning

confidence: 99%

Full-Band Signal Extraction From Sensors in Extreme Environments: The NASA InSight Microseismometer

et al. 2018

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Physically meaningful signal extraction from sensors deployed in extreme environments requires a combination of attenuation of confounding inputs and the removal of their residual using decorrelation techniques. In space applications where the resources for physical attenuation are limited, there is a necessity to apply the most effective post-processing analysis available. This paper describes the extraction of the seismic signal from a MEMS microseismometer to be deployed on the surface of Mars. The signal processing, which covers the full bandwidth 1 × 10 −5 Hz to 40 Hz, uses a novel application of sensor fusion through an indirect Kalman Filter in combination with a thermal model of the microseismometer to remove the aseismic contribution of temperature over the frequency range. Owing to the full-band decorrelation, the analysis (based on pre-landing testing in analogous scenarios) produces both a characterisation of the microseismomter and a signal processing approach for information retrieval on Mars, along with other planetary and terrestrial planetary deployments.

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Microelectromechanical system gravimeters as a new tool for gravity imaging

Cited by 12 publications

References 34 publications

A Portable MEMS Gravimeter for the Detection of the Earth Tides

A Portable MEMS Gravimeter for the Detection of the Earth Tides

A Review of the Capacitive MEMS for Seismology

Full-Band Signal Extraction From Sensors in Extreme Environments: The NASA InSight Microseismometer

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