植入式裝置之能量耦合線圈的角度錯位探討

Study of Receiving Coil Angle Misalignment in Wireless Power Transfer for Biomedical Implant Devices

楊博閔(Bo-Min Yang)

指導教授 ： 莊炯承

中原大學/工學院/生物醫學工程研究所/碩士(2015年)

摘要

在植入式生醫裝置中的能量是急需解決的問題，透過無線能量傳輸方式可以解決目前常常需要更換電池的手術次數，但是無線能量耦合的研究仍需要探討許多效率因子及環境變數。本研究主要探討在充電過程中角度偏差的情況下，磁耦合失敗的能量所導致周遭的皮膚組織溫度上升，進而對人體產生的危害性。若人體組織細胞吸收過多能量，如超過40℃可能將對組織細胞造成蛋白質的變性。在無線充電的發展中，如何將轉換效率提升，是一迫切需要改善的問題。在植入式生醫裝置，開刀之後人體組織的增生，使得在植入式裝置有了些許的偏轉或移動，改變了原本置放時的最佳位置，影響後續充電時的充電效率。因此，本研究想進一步探討最佳的角度充電狀態，以及角度改變對於周圍溫度的影響，利用單晶片控制的方式，計算發射端線圈與接收端線圈目前的傾斜角，再使用步進馬達進行自動校正之功能達到最佳磁耦合情況，最後透過豬肉組織探討充電過程的溫度效應。其結果顯示角度的修正並保持在最佳耦合角度(0度)，可使得整體充電過程兩系統永遠處於最佳的相對位置。

關鍵字

植入式生醫裝置 ； 無線能量傳輸 ； 角度錯位 ； 溫度

並列摘要

It’s a serious problem for power in the device of the implantable. Use wireless power transfer can solve the times of replacing battery, but the research of coupling coils still needs to consider the coupling efficient factor and the environment variable. In this research, the process of wireless charging with angular misalignment causes lots of energy dissipation, and that may also cause shifting the surround of the tissue cause temperature rising. The main subject of this search is to investigate the process of wireless charging with angular misalignment causes lots of energy dissipation, and that may also cause the temperature rising of the surround tissue. Relatively, the temperature is higher than 40℃ probable cause denaturation of protein. In development of wireless power transfer, there’re many ways to elevate the energy efficient. Because of the cell grew after making a surgery. In implant device terms, the device under the tissue will occur misalignment, which leads to bad efficiency. In order to discussion the charging state with the best angle and measure the surround of temperature. Using the microcontroller to measure the slope angle with two coils, then use the stepper motor to operate with the different angle. We also use the tissue of the pork to discuss the variation of the temperature. The temperature variety result of this research is low when charging the battery in the corrected angle.

並列關鍵字

Implant Device ； Wireless Power Transfer ； Angular Misalignment ； Temperature

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