目前已有的手部运动跟踪系统大多在一定程度上限制了人体运动自由.基于此,提出一种无线、可穿戴、无障碍的腕关节、指关节运动跟踪系统.在人体每个手指甲上粘贴一轻小永磁体,用以产生标示腕关节、指关节运动的信号;若干磁传感器置于手腕处的电子腕带上,作为标示信号(磁信号)检测器.当腕关节、指关节运动时,永磁体在各传感器所在位置处的合成磁场发生变化,传感器对该磁场信号进行测量,所检测到的磁场信号送入手部姿势估计器,估计器基于系统数学模型计算手部姿势,从而实现对手部运动的跟踪.
Most existing hand tracking systems have restrictions on human motion.This paper presents a wireless,wearable,and unobstructive wrist-finger tracking system,which uses a small magnet affixed on each fingernail as a position marker and a set of small magnetic sensors attached to an electronic wristband as a detector array.As the wrist and the finger move,the combined magnetic field from all magnets is detected by each sensor at a specific wrist location.The detected data are fed into a hand posture estimator to inversely calculate the hand posture based on a mathematical system model.The measurability and trackability of hand movements in the system are validated,respectively,by measurement and hand tracking experiments.