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J. Sens. Sens. Syst., 7, 403-410, 2018
https://doi.org/10.5194/jsss-7-403-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Regular research article
23 May 2018
Calibration of tri-axial MEMS accelerometers in the low-frequency range – Part 2: Uncertainty assessment
Giulio D'Emilia1, Antonella Gaspari1, Fabrizio Mazzoleni2, Emanuela Natale1, and Alessandro Schiavi2 1Department of Industrial and Information Engineering and of Economics, University of L'Aquila, L'Aquila, 67100, Italy
2INRiM – National Institute of Metrological Research, Turin, 10135, Italy
Abstract. A comparison among three methods for the calibration of tri-axial accelerometers, in particular MEMS, is presented in this paper, paying attention to the uncertainty assessment of each method. The first method is performed according to the ISO 16063 standards. Two innovative methods are analysed, both suitable for in-field application. The effects on the whole uncertainty of the following aspects have been evaluated: the test bench performances in realizing the reference motion, the vibration reference sensor, the geometrical parameters and the data processing techniques. The uncertainty contributions due to the offset and the transverse sensitivity are also studied, by calibrating two different types of accelerometers, a piezoelectric one and a capacitive one, to check their effect on the accuracy of the methods under comparison. The reproducibility of methods is demonstrated. Relative uncertainty of methods ranges from 3 to 5 %, depending on the complexity of the model and of the requested operations. The results appear promising for low-cost calibration of new tri-axial accelerometers of MEMS type.
Citation: D'Emilia, G., Gaspari, A., Mazzoleni, F., Natale, E., and Schiavi, A.: Calibration of tri-axial MEMS accelerometers in the low-frequency range – Part 2: Uncertainty assessment, J. Sens. Sens. Syst., 7, 403-410, https://doi.org/10.5194/jsss-7-403-2018, 2018.

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A comparison among three methods for the calibration of tri-axial MEMS accelerometers is presented, paying attention to the uncertainty assessment of each method. The first method is performed according to the ISO 16063 standards. Two innovative methods are analysed, both suitable for in-field application. For each method, the main contributions to the measurement uncertainty have been identified and evaluated, in order to define their most suitable field of application.
A comparison among three methods for the calibration of tri-axial MEMS accelerometers is...
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