电场定位中极板参数对电场影响的Maxwell 2D仿真

Effect of pole parameters on the performance of conduction field by simulation in Maxwell 2D

背景:在心内三维电场的定位技术中,均匀性和方向性是定位电场的两个重要性能。影响到电场的均匀性和方向性的因素较多,有电极因素、介质因素。分析各种因素对电场性能的影响对提高定位精度有重要意义。目的:分析电极的大小和距离对电场性能的影响。方法:在单一介质中,逐渐改变电极的大小和距离参数,测量不同电极参数下电场的均匀性偏差和方向偏差,通过比较,得出了电场的均匀性和方向性随电极参数的变化规律。结果与结论:结果表明,随着电极变大,距离变大,电场的均匀性和方向性都变好。当电极增大到可以覆盖测量区域时,电场的均匀性为0.017,可以满足定位精度要求。

BACKGROUND： The evenness and directivity of electric field are two important indexes in endocardial three-dimensional mapping technology. The factors that impact the indexes are electric poles and mediator. Therefore, analyzing the influence of the factors on the electricity field is significant. OBJECTIVE： To analyze the effects of poles size and distance on the performance of conduction field. METHODS： The influences of pole parameters were analyzed through simulation and experiment. In a singleness mediator, through alternating the pole parameters step by step, the field voltage was measured and then the evenness index and directivity index were calculated. RESULTS AND CONCLUSION： The results indicated that the evenness index and directivity index got perfect when the size and distance of poles become large. When the poles are as large as the size of measure area, the evenness index is 0.017, which can satisfy the accuracy.