Power assisted bike pedaling force sensor; detects position shifting distance between annular magnet and Hall sensor and resulting voltage signal may be measured

摘要

Screw gears in a transmission system may produce lateral force, which varies a distance between a Hall sensor (N) and an annular magnet according to the pedaling force. A position shifting distance between the annular magnet and the Hall sensor may be detected and a resulting voltage signal may be measured. The voltage signal may control a motor to output a motive power to supply an assisted power for the bike.