Improvement in Power Generation Capability of a Self-Powered Vibration Sensor for Bridge Structural Health Monitoring System

We previously proposed a self-powered vibration sensor device, which is a dual-use device with a vibration sensor and power generator, for a structural health monitoring system for bridges. The device can generate electric power by bridge vibrations caused by vehicle passage. In this study, considering the application of the device to bridges with low traffic volume, we improved the device to enhance the energy-generation capability. The improved design and evaluation results of the device in the field test are discussed.