Identification of calibration and operating limits of a low-cost embedded system with MEMS accelerometer

24th A.I.VE.LA. Annual Meeting

D'Emilia, G.^1 ; Di Gasbarro, D.^1 ; Gaspari, A.^1 ; Natale, E.^1

University of L'Aquila, Department of Industrial and Information Engineering and of Economics, via G. Gronchi, 18, L'Aquila

67100, Italy^1

关键词: Calibration procedure;    Calibration uncertainty;    Dynamic condition;    Laser vibrometers;    MEMS accelerometer;    Metrological performance;    Sensitivity matrix;    System under test;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/882/1/012006/pdf
DOI  :  10.1088/1742-6596/882/1/012006

来源: IOP

【 摘 要 】

In this paper some aspects concerning the calibration uncertainty of three-axis low-cost accelerometers for possible use in diagnostics of civil buildings are considered, using a linear slide and a laser vibrometer as the reference. In order to analyse the principal and cross sensitivity and the offset of the sensor in dynamic conditions, the sensitivity matrix method has been used. Some considerations about the operating limits of a low-cost embedded system with MEMS accelerometer have been discussed, with reference to the calibration procedure. In particular, the effects of the non-constant sampling and of the achievable sampling rate, are studied with reference to the calibration uncertainty and to the capability of the calibration procedure to assess the best metrological performances of the system under test.