DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Yoo, Hoi-Jun | - |
dc.contributor.advisor | 유회준 | - |
dc.contributor.author | Kim, Min-Seo | - |
dc.date.accessioned | 2019-08-25T02:45:59Z | - |
dc.date.available | 2019-08-25T02:45:59Z | - |
dc.date.issued | 2019 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=842394&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/265241 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 전기및전자공학부, 2019.2,[1책 :] | - |
dc.description.abstract | The wearable 3D lung ventilation monitoring system is proposed with electrical impedance tomography (EIT). It consists of two types of SoCs, active electrode (AE)-SoC and Hub-SoC, mounted on wearable belts. The 48-channel AE-SoCs are integrated on flexible printed circuit board (FPCB) belt, and Hub-SoC is inte-grated in the hub module which performs data gathering and wireless communication between an external imaging device. To get high accuracy under variation of conductivity, the dual-mode current stimulator pro-vides the optimal frequency for TD(time difference)-EIT and FD(frequency difference)-EIT with simultane-ous 4k ~ 128kHz impedance sensing. A wide dynamic range instruments amplifier is proposed to provide 94dB of wide dynamic range impedance sensing. In addition, 48-channel AE system with the dedicated communication and calibration is implemented to achieve $1.4m\omega$ sensitivity of impedance difference in in-vivo environment. The AE-/Hub-SoCs occupy $3.2mm^2$ and $1.3mm^2$ in 65nm CMOS technology and con-sume $124\muW$ and 1.1mW with 1.2V supply, respectively. The proposed system integrates a belt board and the hub board in a waist support type clothes for the user's comfort and convenience. After the measured impedance data is transferred to hub-SoC in the Hub board, it is preprocessed and transferred to an external imaging device using Bluetooth module. As a result, the proposed system can display EIT images which are reconstructed with 90% of accuracy and 10 frames/s of real-time 3D lung images. It has only 357g weight and operates at least 6 hours with 3.7V 200mAh battery. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Electrical impedance tomography(EIT)▼alung ventilation monitoring▼areal-time imaging▼a3D-imaging▼aactive electrode▼awide dynamic range▼aimpedance spectroscopy impedance sensor▼awearable healthcare | - |
dc.title | Electrical impedance tomography SoC and system for 3D lung ventilation monitoring | - |
dc.title.alternative | 3D 폐 환기 모니터링용 전기임피던스 단층 촬영 SoC 및 시스템 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :전기및전자공학부, | - |
dc.contributor.alternativeauthor | 김민서 | - |
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