Improvement in efficiency of energy generation for self-powered vibration sensing device

Abstract

In Japan, the percentage of old road bridges will rapidly increase because of the numerous road bridges constructed during the 1960s and 1970s; therefore, an efficient method for diagnosing the soundness of bridges is required. We are developing a vibration-sensing device for a self-powered structural health monitoring system that diagnoses soundness from changes in the vibration characteristics of bridges. In this research, we considered the increase in the power generation capacity to obtain larger energy from the bridge vibrations. Field test results confirmed that the amount of power generation per hour was 51.0 [mJ]．