北京生物醫(yī)學(xué)工程

基于霍爾傳感器陣列的體外磁跟蹤定位系統(tǒng)

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

作者：廖穎姜萍萍顏國正

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

分類號：

出版年·卷·期（頁碼）：2012·31·5（501-506）

摘要：

目的為實(shí)現(xiàn)體內(nèi)微型診療裝置的無創(chuàng)定位，本文提出一種新的定位方法，并開發(fā)了一套基于此方法的實(shí)驗(yàn)系統(tǒng)。方法在分析永磁體空間磁場分布特殊規(guī)律的基礎(chǔ)上，采用基于霍爾原理的磁場檢測方法設(shè)計(jì)一種基于霍爾傳感器陣列的體外磁跟蹤定位系統(tǒng)。通過設(shè)計(jì)系統(tǒng)優(yōu)化實(shí)驗(yàn)、系統(tǒng)性能實(shí)驗(yàn)以及模擬腸道平面實(shí)驗(yàn)驗(yàn)證系統(tǒng)的可行性、準(zhǔn)確性及定位的精確性。結(jié)果該方法定位精度在mm級，滿足實(shí)際應(yīng)用需求。結(jié)論此系統(tǒng)能精確確定永磁體所在空間位置，具有非接觸測量、操作簡單、精度高等特點(diǎn)，為有效監(jiān)測人體腸道內(nèi)的微型診療裝置提供了基礎(chǔ)。

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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