Abstract
We developed a new light-weight power-assisted bicycle using a giant magnetostrictive torque sensor, which is a new mechatronics product for individual use. The key components for power-assisted bicycles are sensors, which are vital for detecting the extremely large forces (maximum crank axle torque: about 160Nm) of power exerted on the pedals by the riders. In this paper we propose a torque detection method that uses a giant magnetostrictive material with a high force detection sensitivity, where the capacity to resist stress is extremely large.
