北京生物醫(yī)學(xué)工程

基于射頻信號(hào)強(qiáng)度的胃腸道內(nèi)微系統(tǒng)位置跟蹤方法研究

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

作者：劉勇王文興顏國(guó)正

單位：上海交通大學(xué)電子信息與電氣工程學(xué)院（上海200240）

關(guān)鍵詞：定位；胃腸道內(nèi)微系統(tǒng)；射頻信號(hào)強(qiáng)度；算法

分類(lèi)號(hào)：

出版年·卷·期（頁(yè)碼）：2010·29·4（353-359）

摘要：

為了解決對(duì)諸如膠囊內(nèi)窺鏡等胃腸道內(nèi)微系統(tǒng)的實(shí)時(shí)位置跟蹤問(wèn)題，本文研究了基于射頻信號(hào)強(qiáng)度對(duì)胃腸道內(nèi)微系統(tǒng)進(jìn)行定位的方法和系統(tǒng)。該系統(tǒng)在人體體外布置射頻接收模塊陣列，由采集到的射頻信號(hào)強(qiáng)度的差異，對(duì)胃腸道內(nèi)微系統(tǒng)進(jìn)行跟蹤定位。文中介紹了定位系統(tǒng)的具體實(shí)現(xiàn)，并搭建了初步的實(shí)驗(yàn)平臺(tái)。實(shí)驗(yàn)結(jié)果表明，該跟蹤方法具有一定的定位精度，能在一定范圍內(nèi)有效地跟蹤目標(biāo)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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