摘要
介绍了目前国际上常用的体内目标的定位方法即放射性同位素扫描和电磁场定位,分析了各自的优缺点,在此基础上提出利用目标体内密封的永久磁铁为磁标记物,在体表处检测多点磁场强度,并采用遗传算法解决非线性方程组的求逆问题从而获得胶囊在体内的位置和方向信息,实现目标在体内的连续定位.仿真实验表明,该方法定位精度在毫米级,完全满足实际应用需求.
This paper introduced some methods used by telemetry monitoring systems, and put forward a localization method by detecting the magnetic field near the body surface produced by a magnet inside the capsule. A genetic algorithm is used for the least-square inverse solution of equations between the magnetic field values and the position, orientation parameters of the capsule. The experiments show that the precision of this method is satisfactory and adequate for practical use.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2005年第6期864-868,共5页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(30270382)
国家高技术研究发展计划(863)项目(2002AA404280)
关键词
内窥镜
遥测胶囊
定位
电磁逆解
非线性最小二乘解
遗传算法
endoscope
wireless capsule
localization
inverse solution of electromagnetic fields
nonlinear least-square solution
genetic algorithm
