电磁式头盔姿态传感系统参数漂移的实时补偿研究

分析电磁式头盔姿态传感系统的参数漂移对采集数据的影响。用一个外加的辅助天线来感应发射电流通过发射天线产生的磁场，感应强度则用来接收电路实时测量，使得无需增加其它硬件便可直接测出系统电路各种参数漂对采集数据所造成的总的误差，并给予实时修正。

On Real-Time Compensation for Parameter Drifts of Electromagnetic Helmet Posture Sensing System

On the basis of analyzing the influence of parameter drifts on sampling data,this article proposes a real time compensation method. A Simple auxiliary attenna is adopted to sensing the magnetic field generated by transmiting current. It keeps a fixed geometric relation with the transmiter attenna,and its output signal is measured directly by the receiver circuit. This enable us,without othermore hardware circuits,to calculate the overall effection of parameter drifts at any time by comparing the measuring results of actual system and that of an ideal system. Mathmatical analysis and experiment result are given in this paper to prove that this method is very effective in keeping the system,s sensing precision.