Accuracy improvement in a calibration test bench for accelerometers by a vision system

D’Emilia, Giulio; Gasbarro, David Di; Gaspari, Antonella; Natale, Emanuela

doi:10.1063/1.4952690

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…Figures 10-12 highlight, for each axis, the relative position and differences among methods. Expanded uncertainty (k = 2) of results, estimated according to D'Emilia et al (2018), is also represented in Figs. 10-12 by error bars.…”

Section: Comparison Between Methodsmentioning

confidence: 99%

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Calibration of tri-axial MEMS accelerometers in the low-frequency range – Part 1: comparison among methods

D’Emilia

Gaspari

Mazzoleni

et al. 2018

J. Sens. Sens. Syst.

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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.

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Section: Comparison Between Methodsmentioning

confidence: 99%

“…Expanded uncertainties (k = 2) of results, estimated according to D'Emilia et al (2018), are also represented in Figs. 16-18 by error bars.…”

Section: Comparison Between Methodsmentioning

confidence: 99%

Calibration of tri-axial MEMS accelerometers in the low-frequency range – Part 1: comparison among methods

D’Emilia

Gaspari

Mazzoleni

et al. 2018

J. Sens. Sens. Syst.

Self Cite

View full text Add to dashboard Cite

show abstract

Calibration of tri-axial MEMS accelerometers in the low-frequency range – Part 2: Uncertainty assessment

D’Emilia

Gaspari

Mazzoleni

et al. 2018

J. Sens. Sens. Syst.

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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.

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Accuracy improvement in a calibration test bench for accelerometers by a vision system

Cited by 2 publications

References 18 publications

Calibration of tri-axial MEMS accelerometers in the low-frequency range – Part 1: comparison among methods

Calibration of tri-axial MEMS accelerometers in the low-frequency range – Part 1: comparison among methods

Calibration of tri-axial MEMS accelerometers in the low-frequency range – Part 2: Uncertainty assessment

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