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中文摘要：
为了对全消化道生理参数诊查胶囊在人体内的三维位置进行连续跟踪，提出了基于电磁感应原理的定位新方法．在人的体表布置6个励磁线圈，采用正弦电流分时激励，在空间产生交变磁场，并在诊查胶囊内封装感应线圈．通过获得感应线圈上的感应电动势，结合定位模型和微粒群算法，可反求诊查胶囊的空间方位．实验表明：定位系统工作稳定，获得了较高的定位精度．
英文摘要：
Implantable micro-capsules can enter into human;s alimentary tract to detect gastrointestinal parameters such as temperature, pressure and pH value. In order to determine the position and orientation of micro-capsule, a novel tracking method based on electromagnetic induction are presented. In this method six excitation coils are mounted on the abdomen of human body. These coils were excited by time-sharing sinusoidal signals to generate alternating fields. Meanwhile, a small induction coil is sealed in the microcapsule to measure the magnitude of the alternating field. According to the localization model and the particle swarm algorithm, the position and orientation can be calculated from the induced electromotive force of the induction coil. The experiments show that the localization system has high precision and good stability.
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