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Open AccessArticle

A Method of Interstory Drift Monitoring Using a Smartphone and a Laser Device

State Key Laboratory of Coastal and Offshore Engineering, School of Civil Engineering; Dalian University of Technology, Dalian 116024, China
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Sensors 2020, 20(6), 1777; https://doi.org/10.3390/s20061777
Received: 21 February 2020 / Revised: 13 March 2020 / Accepted: 20 March 2020 / Published: 23 March 2020
(This article belongs to the Special Issue Sensors in Structural Health Monitoring and Seismic Protection)
Interstory drift is an important engineering parameter in building design and building structural health monitoring. However, many problems exist in current interstory drift monitoring methods. The traditional method is imprecise—double numerical integration of acceleration data—and other direct monitoring methods need professional equipment. This paper proposes a method to solve these problems by monitoring the interstory drift with a smartphone and a laser device. In this method, a laser device is installed on the ceiling while a smartphone is fixed on a steel projection plate on the floor. Compared with a reference sensor, the method designed in this study shows that a smartphone is competent in monitoring the interstory drift. This method utilizes a smartphone application (APP) named D-Viewer to implement monitoring and data storage just in one place, which is also inexpensive. The results showed that this method has an average percent error of 3.37%, with a standard deviation of 2.67%. With the popularization of the smartphone, this method is promising in acquiring large amounts of data, which will be significant for building assessment after an earthquake. View Full-Text
Keywords: seismic monitoring; smartphone; interstory drift; laser device; structural health monitoring seismic monitoring; smartphone; interstory drift; laser device; structural health monitoring
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MDPI and ACS Style

Li, J.; Xie, B.; Zhao, X. A Method of Interstory Drift Monitoring Using a Smartphone and a Laser Device. Sensors 2020, 20, 1777.

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