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J. Sens. Sens. Syst., 7, 245-257, 2018
https://doi.org/10.5194/jsss-7-245-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Regular research article
06 Apr 2018
Calibration of tri-axial MEMS accelerometers in the low-frequency range – Part 1: comparison among methods
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. Two alternative experimental procedures for the calibration of tri-axial accelerometers have been compared with traditional methods, performed according the procedures stated in the standard ISO 16063-21. Standard calibration is carried out by comparison with a laser Doppler vibrometer (LDV), used as a primary reference transducer. The main sensitivities have been investigated and, where applicable, also transverse ones. Many aspects have been evaluated: the hypotheses about transverse sensitivities, the simplicity of the procedure, the number of measurements needed, and the effect of typology of transducer, depending on electrical and geometrical contributions. Two different accelerometers have been tested, a piezo-electric accelerometer and a capacitive MEMS accelerometer. A low-frequency range of vibration has been investigated, 3 and 6 Hz, with amplitude of acceleration ranging from 2 to 20 ms−2. A satisfactory reproducibility of methods has been verified, with percentage differences less than 2.5 %. Anyway, pros and cons of each method are also discussed with reference to their possible use for easy and quick calibration of low-cost tri-axial accelerometers.
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 1: comparison among methods, J. Sens. Sens. Syst., 7, 245-257, https://doi.org/10.5194/jsss-7-245-2018, 2018.

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Low-frequency vibration measurements are of great interest in many fields like energy production, structural health monitoring (SHM) of buildings, geotechnical applications, human vibration and bio-dynamics, mainly because of the increasing development of MEMS embedded in mobile devices and in applications in the field of the Internet of Things (IoT). We investigated the effectiveness and efficaciousness of some available calibration techniques to promote their aware, widespread, use.
Low-frequency vibration measurements are of great interest in many fields like energy...
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