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Testing Walking-Induced Vibration of Floors Using Smartphones Recordings

1
Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
2
Department of Theoretical and Applied Sciences, University degli Studi dell’Insubria, Via Dunant 3, 21100 Varese, Italy
3
Structural Engineering Division, Faculty of Applied Sciences, University of Liège, Allée de la Découverte 1, 4000 Liège, Belgium
*
Author to whom correspondence should be addressed.
Robotics 2020, 9(2), 37; https://doi.org/10.3390/robotics9020037
Received: 27 February 2020 / Revised: 12 May 2020 / Accepted: 15 May 2020 / Published: 20 May 2020
(This article belongs to the Special Issue Advances in Inspection Robotic Systems)
Smartphone technology is rapidly evolving, adding sensors of growing accuracy and precision. Structural engineers are among customers who indirectly benefit from such technological advances. This paper tests whether accelerometers installed in new generations of smartphones can reach the accuracy of professional accelerometers created for vibration monitoring of civil engineering structures, and how they can be useful. The paper describes an experimental study designed to measure walking-induced vibrations of a slender prefabricated prestressed concrete slab. Both traditional, high-accuracy, accelerometers and those integrated into commercial smartphones were used for experimental data collection. Direct comparison of the recordings yielded two key findings: the accuracy of smartphone accelerometers largely depends on the specific smartphone model, and nevertheless is satisfactory for preliminary modal testing at the very least. Furthermore, the smartphone measured accelerations of the lower back were used successfully to indirectly measure pedestrian walking loads. View Full-Text
Keywords: smart sensors; MEMS; accelerometers; structural vibrations; human-induced loading; ground reaction forces; mechatronics smart sensors; MEMS; accelerometers; structural vibrations; human-induced loading; ground reaction forces; mechatronics
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MDPI and ACS Style

Martinelli, L.; Racic, V.; Dal Lago, B.A.; Foti, F. Testing Walking-Induced Vibration of Floors Using Smartphones Recordings. Robotics 2020, 9, 37.

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