Synchronisation of Contactless Vibration Monitoring Methods

Abstract

Today, the analysis of the behaviour of structures represents an important area of engineering, where we are mainly interested in the response of the structure to certain influences.The article and research are based on the theoretical foundations of structural monitoring using contactless methods and discuss the practical analysis and simulation of synchronization of structural response to various artificially induced load cases. The responses of the structure were recorded through various parameters, such as displacement, speed and acceleration, with the help of geodetic (Robotic Total Station -RTS and Global Navigation Satellite System -GNSS) and physical equipment (triaxial geophone). When using geodetic equipment, in addition to the possibility of final synchronization of results, we were also interested in the actual influence of the frequency of data acquisition on the accuracy of measured values. Special attention was paid to spectral analysis, to which we added practical value through data processing using Fourier transform algorithms.

Displacement Monitoring of a Bridge Based on BDS Measurement by CEEMDAN–Adaptive Threshold Wavelet Method

“…Therefore, it is necessary to monitor the health of bridges, especially the displacement generated by the bridge under load [1]. In addition to strain gauge [2], optical fiber sensor, and accelerometer [3], there are also precise level, robotic total station (RTS) [4][5][6][7][8][9], LiDAR DTMs [10,11], and global navigation satellite system (GNSS) instrument [12][13][14], etc. Strain gauge and optical fiber sensors have limitations in displacement measurement [1], and the calculation of accelerometer by double integration will lead to serious errors [15,16].…”