Guo X, Yan G, He W
Institute of Medical Device Engineering, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, PR China.
J Med Eng Technol. 2009;33(3):192-8. doi: 10.1080/03091900701403979.
In order to track the three-dimensional position of a non-invasive detecting microcapsule in the alimentary tract, a novel localization method has been developed. Three coils were respectively energized by square wave signals to generate an electromagnetic field. A 3-axis magnetic sensor was sealed in the microcapsule to measure the electromagnetic field strength. Based on the principle of magnetic dipole a corresponding localization model was established. By resolving the localization equations by means of the neural network algorithm, the spatial position of the microcapsule can be obtained. The experiment shows that the localization principle is correct and has high precision. Compared with other methods, this novel method needs no special equipment and after integration the system can be made into a portable type.
为了跟踪消化道中无创检测微胶囊的三维位置，已开发出一种新型定位方法。三个线圈分别由方波信号供电以产生电磁场。一个三轴磁传感器密封在微胶囊中以测量电磁场强度。基于磁偶极子原理建立了相应的定位模型。通过利用神经网络算法求解定位方程，可获得微胶囊的空间位置。实验表明该定位原理正确且精度高。与其他方法相比，这种新方法无需特殊设备，集成后系统可制成便携式。
