电磁跟踪系统空间位置测量精度标定方法研究

Study on Spatial Position Measurement Accuracy Calibration Method of Electromagnetic Tracking System

以FASTRAK为例,对电磁跟踪系统空间位置测量精度标定问题进行深入研究,提出了一种简单、实用的空间位置精度评价方法,借助独立设计的实验平台,确立运动机构和发射源的位置关系,利用空间变换得到采样点集的真值,进而比较得出测量精度完成评价,提出了基于空间绝对距离方法对上述精度评价方法进行验证。

The calibration problem of spatial position measurement accuracy for electromagnetic tracking device is studied thoroughly, while FASTRAK is as example. A accuracy calibration method is proposed. Experimental platform is designed independently. After the positional relationship between the moving mechanism and the transmission source is established, the true value of the sampling point set is obtained by space transform. And the measurement accuracy is obtained by comparing true value and measurement value. A method based on spatial absolute distance is proposed to verify the evaluation result.