中文摘要：

为了诊断腹主动脉瘤腔内修复术（EVAR）术后是否发生内漏,设计开发了基于无线供能的微型植入式压力检测系统,对瘤腔血压进行植入式无线检测。系统包括：微型无线血压传感器、能量发射线圈、数据读取器和数据处理软件。无线供能的耦合效率在根本上取决于耦合系数,在本设计中,采用铁芯线圈作为能量接收线圈,并通过理论分析和实验研究,优化接收线圈几何尺寸以提高耦合系数。为了提高能量传输的稳定性和整体效率,设计了基于无线通讯的电压反馈回路,实现能量发射功率的自适应调整。采用开发的系统样机进行了初步实验。由实验可知,无线供能的微型植入式血压检测系统可行有效,能准确可靠地采集和无线发送压力数据,能量发射线圈工作距离在8cm以内,数据读取器工作距离在50cm以内。

英文摘要：

In order to detect endoleaks after endovascular aneurysm repair （EVAR）, we developed an implantable micro-device based on wireless power transmission to measure aortic aneurysm sac pressure. The implantable micro-device is composed of a miniature wireless pressure sensor, an energy transmitting coil, a data recorder and a data processing platform. Power transmission without interconnecting wires is performed by a transmitting coil and a receiving coil. The coupling efficiency of wireless power transmission depends on the coupling coefficient between the transmitting coil and the receiving coil. With theoretical analysis and experimental study, we optimized the geometry of the receiving coil to increase the coupling coefficient. In order to keep efficiency balance and satisfy the maximizing conditions, we designed a closed loop power transmission circuit, including a receiving voltage feedback module based on wireless communication. The closed loop improved the stability and reliability of transmission energy. The prototype of the micro-device has been developed and the experiment has been performed. The experiments showed that the micro-device was feasible and valid. For normal operation, the distance between the transmitting coil and the receiving coil is smaller than 8cm. Besides, the distance between the micro-device and the data recorder is within 50cm.