Application to cracked Timoshenko beam of vibration-sensing-actuation devise

Abstract

Road bridges are required to be inspected once every five years. Therefore, it is expected to improve the efficiency and accuracy of inspection technology of road bridges. In this study, we develop a vibration sensing actuation device that solves these problems. The device constructed from an IoT sensor module, an electrical relay circuit, a sinusoidal signal generator, amplifier circuit and an electrodynamic exciter. The applicability of the device was evaluated using experimental beams to see if cracks could be diagnosed. As a result, it was implied that the probability density of acceleration changed depending on the presence or absence of cracks.