2024 Volume 3 Issue 1 Pages 81-89
One of the challenges in bridge health monitoring using sensors and wireless transmission is securing power. Vibration power generation is a potential solution, but it is difficult to select an installation point on a real bridge where the vibration power generation device can generate power efficiently in a short time. In this study, after extracting the target vibration modes and candidate installation positions through eigenvalue analysis, a test vehicle running test was conducted and the installation positions that could generate power efficiently were investigated from among the candidate installation positions using optical vibration sensing technology. At the same time, the applicability of the optical vibration sensing technology used in this study to this bridge member was clarified. The vibration of the bridge members were measured using this technology and accelerometers, and the results showed that the spectral shapes were roughly consistent and that the amplitude of the bridge member could be estimated at a dominant frequency of around 20 Hz. The acceleration of the bridge members extracted by this technology was used in a vibration generator test to evaluate the electric energy generated by the vibration power generation device.
