第22卷第1期 2014年1月
文章编号
1004-924X(2014)01-0132-06
光学精密工程
Optics and Precision Engineering
胶囊内窥镜便携式无线能量发射系统
石煜*，额国正，朱柄全
（上海交通大学电子信意与电气工程学院，上海200240）
Vol.22No.1
Jan.2014
摘要：对采用电磁感应无线能量传输（WPT)系统为视频胶衰囊内瘾镜（VCE)提供能量的技术进行优化，主要对无线能量发射系统进行了改进，并搭建了便携式WPT平台。通过比较磁场强度和均匀度，选定了合适的发射线图结构，通过分
况。实验显示：优化设计的WPT系统稳定可靠，VCE在WPT平台上.工作正常，可以30frame/s的顿率向接收天线发送分辨率为320X240的图像，功率为78.4mW。该无线能量发射系统可携带，传输效率和稳定性受人体行动影响较小，可
保证VCE在高额率和高分辨率状态下持续工作，提高了VCE临床应用的可行性。关键调：无线能量传输；视频股景内究镜；谱振电路；频率稳定性
中图分类号：TH776.1
文献标识码：A
doi;10.3788/OPE.20142201.0132
Portablewireless powertransmitting system forvideo capsuleendoscopes
SHIYu',YANGuo-zheng,ZHUBing-quan
(School ofElectronic Information and Electrical Engineering,Shanghai JiaoTongUniversity,
Shanghai 200240,China)
*Correspondingauthor，E-mail:flowers3344@gmail.com
Abstract: An existing Wireless Power Transmission (WPT) system based on electromagnetic induc tive coupling for Video Capsule Endoscopes (VCE) was optimized, which focused on improving its en-ergy transmission system. A portable WPT platform was presented with the detailed information a-bout system optimization. The proper structure of transmitting coil was selected through comparing magnetic density and uniformity, then the transmission frequency of the system was chosen in terms of analyzing the resonance principle and testing the quality factors (Qfactor). The frequency stabili ty was improved using an adjustable inductance in series with the transmission circuit, and the trans mitting current fluctuation along with the frequency was measured. The experiments show that the optimized WPT system can transmit an output power of 78.4 mW for the VCE, in stable and reliable functions. During experiments, the VCE produces clear images with a resolution of 320 X 240 at a frame rate of 3o frames per second. The feasibility of VCE for the clinical applications has been im proved as the portable energy transmission system has a higher transmission efficiency and stability and can support the VCE to work continuously in a higher resolution and frequency.
Key words: wireless power transmission; video capsule endoscopy; resonant circuit; frequency stability
收稿日期：2013-08-12；修订日期：2013-09-10
基金项目：国家自然科学基金资助项目（No.31170968，No.31271069）