Nigerian Building and Road Research Institute
(Federal Ministry of Science, Technology and Innovation)
MONITORING OF HIGHWAY BRIDGE USING ACCELEROMETER SENSOR
(Dindima and Masori Bridges)
Presented by
Kamaluddeen Musa Yashi
SLT Department
Correspondence: 57yashi1@gmail.com
Abstract
Bridges, being among the most exposed physical infrastructures, are subject to environmental factors such as temperature variations and moisture levels, which can lead to physical deterioration like corrosion and fatigue, ultimately affecting their longevity. To extend their lifespan, it is crucial to conduct thorough inspections of structural elements to mitigate potential risks. In this project, a combination of techniques including visual inspection using an Unmanned Aerial Vehicle (UAV), accelerometer sensors were employed to analyze the vibrational frequencies experienced by the bridges. Accelerometer sensors are widely utilized devices for assessing bridge vibrations, and in this study, they were implemented in real-time for continuous bridge health monitoring. The primary objective of this study was to evaluate the condition of the bridge through UAV-assisted visual inspection and the measurement of vibrations using accelerometer sensors. The sensor framework assessed the displacement of the bridge using data collected from the accelerometers affixed to the bridge deck. Subsequently, the recorded vibration measurements were analyzed using the Hansford vibration monitoring application. The highest recorded vibrational frequencies were 12Hz for Dindima Bridge and 10Hz for Masori Bridge, both of which were below the critical threshold of 16Hz and the Dindima bridge has the (l0.7inch, 3,8inch) displacement while Masori also has (1.0inch, 3.0inch). This indicates that both bridges are in good condition. While some minor deteriorations were observed, the overall structure remains within safe parameters. Recommendations have been formulated based on these findings to further enhance the longevity and safety of the bridges.
Keyword: Accelerometer sensor, UAV, vibrations, Displacement, Hansford vibration application