Research On Human Implantable Wireless Energy Transmission And Its Intelligent Charging Management System

The progress of medical technology promotes the human implantable devices are widely used in our daily life. In the near future, the human implantable devices are not only an important guarantee of human health, but also to maintain the human’s life. Human implantable devices have a very broad application prospects in health care and clinical application. Human implantable devices treat human diseases by means of noninvasive or minimally invasive, which can avoid the secondary surgery for patients with all kinds of risks. At present, some implantable medical devices have already been widely used. This thesis carried on the thorough research to the existing human implantable medical devices and analyzed the existing human implantable medical’s energy transmission and control mode. We found most of them have the problems of low charging efficiency, charging blindly and data transmission difficulty. So we have made some reforms and innovations on the basis of them. At the same time, we implemented a more efficient and intelligent human embedded system.Firstly, this thesis gives a simple introduction of human embedded system’s working principle. At present, the wireless energy is mainly transmitted by Electromagnetic induction, Electromagnetic Radiation and resonance coupling. We found the resonance coupling is the best way to transmit wireless energy by comparing these three transmission mode. We used MATLAB and HFSS to simulate the resonance coupling coil and designed a corresponding mode of the coil.After choosing the wireless energy transmission way and the resonance coupling coil. This thesis gives a simple introduction of the human implantable system’s system structure and gives a detail introduction of each module’s working principle and the realization of the hardware circuit. The innovation of our system is to introduce the demodulation circuit. It can be realized the carrier communication on the basis of high frequency electromagnetic wave. It has the advantages of high communication efficiency and simple hardware implementation. The vitro equipment can have accuracy and real-time control to the human implantable devices by this efficient communication way and this can play a vital role in improving the working performance and life of human implantable devices. This thesis puts forward the human implantable system’s block diagram and gives a detail introduction about it.This thesis puts forward a corresponding intelligent charging management system on the basis of human implantable wireless energy transmission system. The performance of the rechargeable battery is the foundation of human implantable devices. Firstly, we give a detailed introduction of the performance of some kinds of rechargeable battery and a comprehensive comparison on their performance. We found that the polymer lithium ion battery is the most suitable for the human implantable wireless energy transmission system. On this basis, this thesis also gives a comparison of the battery performance’s monitoring methods. Then we found that the coulomb method has the advantages of auxiliary circuit simple, high accuracy and small impacts by external environment. So our system adopts coulomb method to monitor the battery’s performance. This thesis gives a detail introduction of the intelligent charging system’s implementation way and the working process.After the realization of the system’s design, we also did an experiment on the performance of the human implantable system and its intelligent charging management system. After the comparison of air medium and brine mediums’ transmission performance, we verified the feasibility of this system by using the brine to simulate human tissue. At the same time, we also verified the anti-interference ability and charging control ability of our system by changing the charging device’s ID record. Finally, we can say that the human implantable system and its intelligent charging management system are reliable and practical.The system which designed by this thesis solved the problems of human implantable devices’low charging efficiency, charging blindly and data transmission difficulty. It plays a positive role to promote the application and development of human implantable devices.