北京生物医学工程

基于霍尔传感器阵列的体外磁跟踪定位系统

Magnet field tracking system in vitro based on the Hall effect sensors array

作者：廖颖姜萍萍颜国正

单位：上海交通大学电子信息与电气工程学院（上海200240）

分类号：

出版年·卷·期（页码）：2012·31·5（501-506）

摘要：

目的为实现体内微型诊疗装置的无创定位，本文提出一种新的定位方法，并开发了一套基于此方法的实验系统。方法在分析永磁体空间磁场分布特殊规律的基础上，采用基于霍尔原理的磁场检测方法设计一种基于霍尔传感器阵列的体外磁跟踪定位系统。通过设计系统优化实验、系统性能实验以及模拟肠道平面实验验证系统的可行性、准确性及定位的精确性。结果该方法定位精度在mm级，满足实际应用需求。结论此系统能精确确定永磁体所在空间位置，具有非接触测量、操作简单、精度高等特点，为有效监测人体肠道内的微型诊疗装置提供了基础。

Objective To realize the non-invasive location of micro-diagnosis and treatment system in vivo, a new method of magnetic location is proposed, and an experimental system based on this method has been exploitated. Methods Based on the distributing rule of permanent magnetic field and the method of magnetic location based on Hall effect, a magnet field tracking system in vitro is proposed which is based on the Hall effect sensor array. System optimization experiment, system performance experiment and the simulation experiment of intestine plane are designed to verify the feasibility and accuracy of this system and the precision of location results. Results The location precision of this method is millimeter-sized, which is satisfactory and adequate for practical use．Conclusions This system is non-contact measuring，low-cost, easy-cooperate, high-precision and can precisely track the location of the tiny magnet. The system provides a foundation for the further study of the accurate positioning and monitoring in the intestinal tract.

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