Battery-less Real-Time Wireless Sensing by Magnetostrictive Vibrational Power Generator

- Three-Axis Acceleration Sensing of Bulldozer Blades -

Abstract

In this paper, we designed a generator and power conversion circuit for battery-free real-time wireless sensing powered by magnetostrictive vibration power generation, and demonstrated it on a bulldozer blade vibration. We attached the generator device to the blade and measured the open circuit voltage, and confirmed that a power equivalent to 29.8 mW was obtained. In addition, by supplying power from the generator through a power conversion circuit to a wireless sensor with a power consumption of 10 mW, it was confirmed that sensing could be performed without interruption. Thus, we demonstrated that battery-less real-time wireless sensing by magnetostrictive vibration power generation is feasible.