Optimization Design for Receiving Coil with Novel Structure Based on Mutual Coupling Model in Wireless Power Transmission for Capsule Endoscope

Shuai Kuang, Guozheng Yan and Zhiwu Wang
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Shuai Kuang: Department of Precise Medical Engineering and Intelligent Electronic Microsystems, Shanghai Jiao Tong University, Shanghai 200240, China
Guozheng Yan: Department of Precise Medical Engineering and Intelligent Electronic Microsystems, Shanghai Jiao Tong University, Shanghai 200240, China
Zhiwu Wang: Department of Precise Medical Engineering and Intelligent Electronic Microsystems, Shanghai Jiao Tong University, Shanghai 200240, China

Energies, 2020, vol. 13, issue 23, 1-14

Abstract: Wireless capsule endoscope (WCE) is a promising technology for noninvasive and painless imaging detection on gastrointestinal (GI) diseases. On the other hand, conventional endoscopes with wires could discomfort patients and cause them to vomit and aerosolize coronavirus if the patients are infected with COVID-19. However, there stands a technical bottleneck on power supply for the WCE. With the help of wireless power transmission technology, a hollow receiving coil (RC) is proposed to supply sufficient power and also minimize the size of WCE. A model on mutual inductance between transmitting and receiving coils is proposed to evaluate receiving power when the RC is in a different position and direction of patient’s GI tract. Based on the model, an optimal RC is built to obtain sufficient and stable power. Measurement of mutual inductance with the optimal RC validates high accuracy of the proposed model. The standard deviation of receiving power is very low. WCE with optimum RC gets sufficient power and captures images stably in live pig’s intestine tract. Additionally, the model is little affected by biological tissues. It ensures reliable performance of WCE and makes popular clinical application of WCE possible, which is also a relief to reduce epidemics like COVID-19.

Keywords: biomedical micro devices; gastrointestinal diseases; noninvasive endoscope; wireless capsule endoscope (WCE); wireless power transmission (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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