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

• Published in: Sensors (Basel, Switzerland) Vol. 20; no. 6; p. 1777
• Main Authors: Li, Jinke, Xie, Botao, Zhao, Xuefeng
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 23-03-2020; MDPI
• Subjects: Building design; Buildings; Codes; Data acquisition; Data storage; Design parameters; Earthquakes; Experiments; interstory drift; Laboratories; laser device; Lasers; Light emitting diodes; Methods; Numerical integration; Photogrammetry; Plates (structural members); Seismic engineering; seismic monitoring; Sensors; smartphone; Smartphones; Structural health monitoring; Vision systems; seismic monitoring; structural health monitoring; interstory drift; smartphone; laser device
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s20061777

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.