Estimation of Displacement Response in Steel Plate Girder Bridge Using a Single MEMS Accelerometer

Live load-induced deformation is a significant evaluation index for bridge maintenance. To measure a structural displacement response, a method using several MEMS (Micro Electro Mechanical Systems) accelerometers has previously been developed. However, this method requires several sensors, and for i...

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Bibliographic Details
Published in:IEEE sensors journal 2021-03, Vol.21 (6), p.8204-8208
Main Authors: Morichika, Shogo, Sekiya, Hidehiko, Zhu, Yanjie, Hirano, Shuichi, Maruyama, Osamu
Format: Article
Language:English
Subjects:
Acceleration
Accelerometers
Bridge circuits
Bridge maintenance
Bridge monitoring
Displacement
displacement measurement
Error analysis
Evaluation
Frequency measurement
Girder bridges
Live loads
Mechanical systems
MEMS accelerometer
Microelectromechanical systems
Micromechanical devices
Sensors
Steel plates
wavelet transform
Wavelet transforms
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Summary:Live load-induced deformation is a significant evaluation index for bridge maintenance. To measure a structural displacement response, a method using several MEMS (Micro Electro Mechanical Systems) accelerometers has previously been developed. However, this method requires several sensors, and for improved practicality, a reduction in the number of sensors is desired. Therefore, in this article, a simple displacement monitoring method is proposed that uses only one MEMS accelerometer, which is installed at the longitudinal center of the target bridge. A wavelet transform-based method is applied to the acceleration records to identify the integration range for displacement estimation. The accuracy was evaluated on an actual in-service bridge. The result indicates high accuracy of displacement measurements, with only 5% error when compared with the values recorded by a contact displacement gauge.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2021.3051697