北京生物医学工程

基于射频信号强度的胃肠道内微系统位置跟踪方法研究

Position Telemetering Based on Radio Frequency Signal Strength for MicroGastrointestinal Endoscope

作者：刘勇王文兴颜国正

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）：2010·29·4（353-359）

摘要：

为了解决对诸如胶囊内窥镜等胃肠道内微系统的实时位置跟踪问题，本文研究了基于射频信号强度对胃肠道内微系统进行定位的方法和系统。该系统在人体体外布置射频接收模块阵列，由采集到的射频信号强度的差异，对胃肠道内微系统进行跟踪定位。文中介绍了定位系统的具体实现，并搭建了初步的实验平台。实验结果表明，该跟踪方法具有一定的定位精度，能在一定范围内有效地跟踪目标物的位置。

In order to determine a position of microgastrointestinal endoscope, such as an implantable microcapsule, in gastrointestinal track, this paper develops a locating system based on radio frequency(RF) signal strength.In this system the array of RF sensors was located over the abdomen of human body, and these RF sensors obtained the radio frequency signal strength (RSS) by RF communication with the microgastrointestinal endoscope. Based on the localization model, the position of microgastrointestinal endoscope could be calculated from the difference of the RSSI caught by the array of the RF sensors. The realization of the localization system and the basic experiment device to validate this system were introduced. The experiments showed the localization system could be effective to tract the position of the target in some cases.

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