基于永磁体空间磁场检测的体内微型诊疗装置定位系统的研究

Study of Micro Medical Device Location System Inside Human Body Based on Permanent Magnet Field Detecting

在微型诊疗装置的应用中 ,微型装置的体内空间定位非常重要。作者根据消化道微型诊疗装置研究的需要 ,设计了一种基于永磁体空间磁场检测的体内微型诊疗装置定位系统 ,由霍尔传感器阵列检测固定在微型装置上永磁体的空间磁场 ,经多路信号处理电路和单片机采集数据 ,再把数据通过串口通信传输给主控计算机 ,进而对数据分析处理计算出微型诊疗装置在体内的空间位置。实验表明 ,该系统可实时采集数据并可靠传输 ,空间磁场强度随距离有特定的变化规律 。

The location of the micro medical device inside the human body is very important in the diagnosis and treatment process. As the need of the research on micro\|system in alimentary canal, the author designed a magnet\|based micro medical device location system, in which the magnetic field of permanent magnet fixed on micro medical device is measured by Hall sensor array, the signals can be processed by multi channels circuit and sampled by a single chip processor. Then, a PC receives the data through a serial port and calculates the position of the micro medical device inside the human body. It is proved that, the signals can be detected real time and transmitted reliably by this system. The experimenal results indicate there is explicit varying rule of magnetic field with the variety of distance between Hall sensor and permanent magnet.