MEMS Based Bridge Monitoring Supported By Image-Assisted Total Station

authored by: Mohammad Omidalizarandi, Ingo Neumann, Eva Kemkes, Boris Kargoll, Dmitri Diener, Jürgen Rüffer, Jens-André Paffenholz
Abstract: In this study, the feasibility of Micro-Electro-Mechanical System (MEMS) accelerometers and an image-assisted total station (IATS) for short- and long-term deformation monitoring of bridge structures is investigated. The MEMS sensors of type BNO055 from Bosch as part of a geo-sensor network are mounted at different positions of the bridge structure. In order to degrade the impact of systematic errors on the acceleration measurements, the deterministic calibration parameters are determined for fixed positions using a KUKA youBot in a climate chamber over certain temperature ranges. The measured acceleration data, with a sampling frequency of 100 Hz, yields accurate estimates of the modal parameters over short time intervals but suffer from accuracy degradation for absolute position estimates with time. To overcome this problem, video frames of a passive target, attached in the vicinity of one of the MEMS sensors, are captured from an embedded on-axis telescope camera of the IATS of type Leica Nova MS50 MultiStation with a practical sampling frequency of 10 Hz. To identify the modal parameters such as eigenfrequencies and modal damping for both acceleration and displacement time series, a damped harmonic oscillation model is employed together with an autoregressive (AR) model of coloured measurement noise. The AR model is solved by means of a generalized expectation maximization (GEM) algorithm. Subsequently, the estimated model parameters from the IATS are used for coordinate updates of the MEMS sensor within a Kalman filter approach. The experiment was performed for a synthetic bridge and the analysis shows an accuracy level of sub-millimetre for amplitudes and much better than 0.1 Hz for the frequencies. </jats:p>
Organisation(s): Geodetic Institute
External Organisation(s): Anhalt University of Applied Sciences
Allsat GmbH
Type: Conference article
Journal: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Volume: 42
Pages: 833-842
No. of pages: 10
ISSN: 2194-9034
Publication date: 18.10.2019
Publication status: E-pub ahead of print
Peer reviewed: Yes
ASJC Scopus subject areas: Geography, Planning and Development, Information Systems
Electronic version(s): https://doi.org/10.5194/isprs-archives-xlii-4-w18-833-2019 (Access: Open)
https://doi.org/10.15488/10873 (Access: Open)
: Details in the research portal "Research@Leibniz University"