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Open AccessArticle

Deformation Activity Analysis of a Ground Fissure Based on Instantaneous Total Energy

1
Key Laboratory for Urban Geomatics of National Administration of Surveying, Mapping and Geoinformation, Engineering Research Center of Representative Building and Architectural Heritage Database, the Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
2
Beijing Institute of Geo-enginnering and Exploration, Beijing 100048, China
3
Department of Geography, University College London, Gower Street, London WC1E 6BT, UK
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(11), 2607; https://doi.org/10.3390/s19112607
Received: 8 May 2019 / Revised: 6 June 2019 / Accepted: 6 June 2019 / Published: 8 June 2019
(This article belongs to the Special Issue Remote Sensing of Geohazards)
This study proposes a novel instantaneous total energy method to perform an activity analysis of ground fissures deformation, which is calculated by integrating the extreme-point symmetric mode decomposition (ESMD) method and kinetic energy based on the time-series displacement acquired by shape acceleration array (SAA) sensors. The proposed method is tested on the Xiwang Road fissure in Beijing, China. First, to fully monitor the hanging wall and footwall of the monitored ground fissure, a 4 m-long SAA in the vertical direction and an 8 m-long SAA in the horizontal direction were embedded in a ground fissure to obtain an accurate time-series displacement with an accuracy of ±1.5 mm/32 m and a displacement acquisition frequency of once an hour. Second, to improve the accuracy of the activity analysis, the ESMD method and Spearman’s rho are applied to perform signal denoising of the original time-series displacement obtained by the SAA sensors. Finally, the instantaneous total energy is obtained to analyze the activity of the monitored ground fissure. The results demonstrate that the proposed method is more reliable to reflect the activity of a monitored ground fissure compared to the time-series displacement. View Full-Text
Keywords: activity analysis; ground fissures; shape acceleration array (SAA); extreme-point symmetric mode decomposition (ESMD); instantaneous total energy activity analysis; ground fissures; shape acceleration array (SAA); extreme-point symmetric mode decomposition (ESMD); instantaneous total energy
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MDPI and ACS Style

Liu, X.; Su, S.; Ma, J.; Yang, W. Deformation Activity Analysis of a Ground Fissure Based on Instantaneous Total Energy. Sensors 2019, 19, 2607.

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