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Presenters: Mohammad Omidalizarandi1, Jens-André Paffenholz2, Frederic Hake1, Ingo Neumann1
1Geodetic Institute, Leibniz University Hannover, Germany.
2Institute of Geo-Engineering, Clausthal University of Technology.
Description Today, short- and long-term structural health monitoring (SHM) of civil engineering infrastructures based on terrestrial laser scanner (TLS) and accelerometers has received considerable attention. In the scope of this workshop, we will address three major issues in this regard.
The first part will focus on theoretical aspects including deformation monitoring models (congruence and kinematic), sensor aspects (TLS, accelerometer), data acquisition and geo-referencing, approximation approaches (e.g. curve and surface based), and basics on time series analysis.
In the second part, we are demonstrating the theoretical issues with practical examples as follows:
a) Introduction of the used sensors (TLS, accelerometer)
b) Data acquisition and measurement procedures
c) Analysis concepts (basic concepts in time series analysis as well as adjustment calculations) including surface computations and comparisons
d) Practical examples in congruence or kinematic deformation analysis of static and kinematic objects
e) Demonstration of pre-processing point clouds to perform a fully automated damage detection by means of machine-learning algorithms.
The third part is dedicated to practice the time series analysis of datasets from the accelerometers and 2D profiles of the TLS.
Target audience: Master students, PhD students, researchers and practitioners
Level: Beginner to intermediate
Duration: 4 hours (13:30 – 17:30 (Iran local time), 22. February 2023)
Presenters Information
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Dr.-Ing. Mohammad Omidalizarandi received a B.Sc. degree (Surveying Engineering) from the Iran University of Science and Technology (2004) and M.Sc. degree (Geomatics Engineering) from the University of Stuttgart (2011). Since 2014, he has been at the Geodetic Institute of the Leibniz University Hannover. Since 2021, He is the postdoctoral researcher and leader of the working group Interdisciplinary Monitoring at the Geodetic Institute of the Leibniz University Hannover. His research areas are: Low-cost deformation monitoring (natural and civil structures), vibration analysis, time series analysis, robust parameter estimation, adjustment computation, sensor calibration and error modelling (i.e. terrestrial laser scanning, total station, digital camera, accelerometer, Persistent Scatterer Interferometry data), and sensor integration.
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Prof. Dr.-Ing. Jens-André Paffenholz received his Dipl.-Ing. and Ph.D. in Geodesy and Geoinformatics at the Leibniz University Hannover in 2006 and 2012, respectively. From 02-2014 to 10-2019, he has been the leader of the working group Terrestrial Laser Scanner Based Multi-Sensor Systems | Engineering Geodesy at the Geodetic Institute of the Leibniz University Hannover. Since 11-2019 he is a full professor in the field of Geomatics for Underground Systems at Clausthal University of Technology (TUC). Prof. Paffenholz and his Geomatics team of the Institute of Geo-Engineering at TUC is doing research in the field of laser scanning and multi-sensor systems with the aim of an efficient three-dimensional data acquisition for monitoring and change detection of natural and anthropogenic structures. Prof. Paffenholz is active in national (DVW e. V.) and international scientific associations (working group chair of IAG WG 4.1.3) and also co-editor of the journal avn.
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Prof. Dr.-Ing. Ingo Neumann received his Dipl.-Ing. and Ph.D. in Geodesy and Geoinformatics at the Leibniz Universität Hannover in 2005 and 2009, respectively. From 2009 to 2012 he was head of the Geodetic Laboratory at the University FAF Munich. Since 2012 he is Full Professor in the field of Engineering Geodesy and Geodetic Data Analysis at the Geodetic Institute of the Leibniz Universität Hannover. From 2014 on, he is also head of the Geodetic Institute. His research areas are: adjustment theory and error models, multi-sensor systems, quality assessment, geodetic monitoring, terrestrial laser scanning, deep learning and automation of measurement processes. He is active in national and international scientific associations and member of the German and International Organization of Standardization (DIN and ISO).
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