Comparison of simple gravity based accelerometer calibration procedures

Mulloy, F., Brown, O. and Mullineaux, D. R. (2019) Comparison of simple gravity based accelerometer calibration procedures. In: 37th International Society of Biomechanics in Sport Conference, July 21-25, 2019, Oxford, OH, United States.

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Comparison of simple gravity based accelerometer calibration procedures
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Item Type:Conference or Workshop contribution (Paper)
Item Status:Live Archive


Accelerometers are commonly used, yet the process of calibrating them and the influence this has on recorded accelerations is rarely reported. The aim of this study was to compare the accuracy of three simple gravity based calibration methods of accelerometers. Using a custom made rig, 16 Delsys Trigno sensors were simultaneously calibrated by positioning the sensors in 9 positions throughout the full range of orientations across three axes. Three calibration methods were used spanning a range of 1g (1G), 2g (2G), and 2g with optimisation (2Gopt). Errors were greatest in 1G (RMSD=3.1%) and equally as good for the 2G and 2Gopt (2.1%). Gravity based calibration of accelerometers can be achieved quickly, and calibration over a larger range provides more accurate results. This work provides recommendations of accelerometer use which help the applied practitioner to collect more reliable and valid data. Further investigation of factors, including those affecting the frequency of calibration, is required.

Keywords:Accuracy, Error, IMU
Subjects:C Biological Sciences > C600 Sports Science
G Mathematical and Computer Sciences > G600 Software Engineering
Divisions:College of Social Science > School of Sport and Exercise Science
ID Code:40653
Deposited On:27 Apr 2020 14:19

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