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3D 프린트 된 몰드로 제작한 마이크로범프와 액체 금속을 이용한 헬스 케어를 위한 웨어러블 유연 압력센서 개발
김규영(Kyuyoung Kim),정용록(Yongrok Jeong),최중락(Jungrak Choi),김민성(Minseong Kim),박재호(Jaeho Park),김승환(Seunghwan Kim),오용석(Yongsuk Oh),박인규(Inkyu Park) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
We introduce a wearable microfluidic pressure sensor using 3D printing technology for health monitoring applications. Our pressure sensor fabricated with elastomer and liquid metal that provide stretchability has an enhanced sensitivity compared to other reported microfluidic pressure sensors. Also, 5,000 cyclic test showed its reliable and stable signal response. The microchannels are fabricated by 3D-printed microchannel molds with 3D-printed microbumps. The effect of microbump in the channel was analyzed using finite element method (FEM) simulation and demonstrated through various eletromechanical experiments. For health monitoring applications, human body pressure distribution was monitored in real-time using pressure sensor array attached on the clothes. The pressure sensing system using the proposed pressure sensor would be applied to early diagnosis and prevention of diseases such as bedsores.
김창희(Changhee Kim),연성현(Seonghyeon Yeon),김규영(Kyuyoung Kim),이남수(Namsoo Lee),조용(Yong Cho) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11
Heat pump systems offer economical alternatives of recovering heat from different sources for use in various industrial, commercial and residential applications. Heat pump becomes a key component in an energy system with great potential for energy saving. This paper presents the design process and experimental results of oil-free water-source heat pump system. A set of experimental tests was first carried out to examine the performance of heat pump system under three different operating conditions.
박막형 유연 압력 센서의 제작과 고주파소작술환경 내 실시간 압력 모니터링에의 활용
정용록(Yongrok Jeong),박재호(Jaeho Park),김규영(Kyuyoung Kim),박인규(Inkyu Park) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
Radiofrequency ablation (RFA) is the promising method in field of minimally invasive cancer surgery. However, due to the high temperature and packed ablating site, treatment pressure is very high, and this can cause the explosive popping of the steam, named “steam popping”. This steam popping can cause the recurrence and metastasis of the cancer, so it is very critical to the patient. To solve this problem, the method to monitor the internal tissue pressure during RFA was suggested in this research. The thin film based flexible pressure sensor was fabricated and attached on the RFA needle. Pressure was measured through the change of contact resistance between microstructured PI/CNT film and electrode. In conclusion, pressure sensor integrated RFA needle detect the steam popping, successfully.