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Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements

Low-cost MEMS accelerometers have the potential to be used in a number of tilt-based monitoring applications but have the disadvantage of being very sensitive to temperature variation (thermal drift). In this paper, we analyze the thermal behavior of a low-cost sensor in the range −10 to +45 °C in o...

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Autores principales: Ruzza, Giuseppe, Guerriero, Luigi, Revellino, Paola, Guadagno, Francesco M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6111670/
https://www.ncbi.nlm.nih.gov/pubmed/30072680
http://dx.doi.org/10.3390/s18082536
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author Ruzza, Giuseppe
Guerriero, Luigi
Revellino, Paola
Guadagno, Francesco M.
author_facet Ruzza, Giuseppe
Guerriero, Luigi
Revellino, Paola
Guadagno, Francesco M.
author_sort Ruzza, Giuseppe
collection PubMed
description Low-cost MEMS accelerometers have the potential to be used in a number of tilt-based monitoring applications but have the disadvantage of being very sensitive to temperature variation (thermal drift). In this paper, we analyze the thermal behavior of a low-cost sensor in the range −10 to +45 °C in order to provide a simple compensation strategy to mitigate this problem. For sensor analysis, we have developed a miniaturized thermal chamber, which was mounted on a tilting device to account for tilt angle variation. The obtained raw data were used to construct low degree polynomial equations that by relating the measurement error induced by thermal drift (i.e., acceleration residuals) to temperature and inclination (of each specific axis), can be used for thermal compensation. To validate our compensation strategy, we performed a field monitoring test and evaluated the compensation performance by calculating RMS errors before and after correction. After compensation, the RMS errors calculated for both the X and Y axes decreased by 96%, indicating the potential of using a simple set of equations to solve common drawbacks that currently make low-cost MEMS sensors unsuitable for tilt-based monitoring applications.
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spelling pubmed-61116702018-08-30 Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements Ruzza, Giuseppe Guerriero, Luigi Revellino, Paola Guadagno, Francesco M. Sensors (Basel) Article Low-cost MEMS accelerometers have the potential to be used in a number of tilt-based monitoring applications but have the disadvantage of being very sensitive to temperature variation (thermal drift). In this paper, we analyze the thermal behavior of a low-cost sensor in the range −10 to +45 °C in order to provide a simple compensation strategy to mitigate this problem. For sensor analysis, we have developed a miniaturized thermal chamber, which was mounted on a tilting device to account for tilt angle variation. The obtained raw data were used to construct low degree polynomial equations that by relating the measurement error induced by thermal drift (i.e., acceleration residuals) to temperature and inclination (of each specific axis), can be used for thermal compensation. To validate our compensation strategy, we performed a field monitoring test and evaluated the compensation performance by calculating RMS errors before and after correction. After compensation, the RMS errors calculated for both the X and Y axes decreased by 96%, indicating the potential of using a simple set of equations to solve common drawbacks that currently make low-cost MEMS sensors unsuitable for tilt-based monitoring applications. MDPI 2018-08-02 /pmc/articles/PMC6111670/ /pubmed/30072680 http://dx.doi.org/10.3390/s18082536 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ruzza, Giuseppe
Guerriero, Luigi
Revellino, Paola
Guadagno, Francesco M.
Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements
title Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements
title_full Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements
title_fullStr Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements
title_full_unstemmed Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements
title_short Thermal Compensation of Low-Cost MEMS Accelerometers for Tilt Measurements
title_sort thermal compensation of low-cost mems accelerometers for tilt measurements
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6111670/
https://www.ncbi.nlm.nih.gov/pubmed/30072680
http://dx.doi.org/10.3390/s18082536
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