• 대한전자공학회논문지TE
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• 제42권3호
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• pp.1-6
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• 2005

개발된 24 채널 경락 전위측정 시스템의 구성은 마이컴 제어부, 생체신호 아날로그 증폭부, 인터페이스부, 전원장치, personal computer 등 이다. 사용자 인터페이스 프로그램은 이용자를 편리하게 구성하였으며, 측정의 편리성으로 calibration기능 및 자료의 저장 과 검색 기능을 하게 하였다. 경락 전위를 측정하기 위한 프로그램을 구성하여 제어 할 수 있게 하였다. 측정된 생체 전기 신호 자료의 분석을 통하여 각각의 위치에 대한 전위의 상호 분포를 비교하여 결과를 체계적으로 나타낼 수 있게 프로그램 처리 하였다. 다양한 종류의 측정 조건을 변화 할 수 있게 구성하여 경락 전위를 측정을 위한 이용자에게 유리한 측정 환경이 되게 하였다.

• Transactions on Electrical and Electronic Materials
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• 제16권1호
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• pp.42-45
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• 2015

The ability to take electrocardiographic measurements while performing our daily activities has become the people-choice for modern age vital sign sensing. Currently, wet and dry ECG electrodes are known to pose threats like inflammations, allergic reactions, and metal poisoning due to their direct skin interaction. Therefore, the main goal in this work is to implement a very small ECG sensor system with a capacitive coupling, which is able to detect electrical signals of heart at a distance without the conductive gel. The aim of this paper is to design, implement, and characterize the contactless ECG electrodes. Under a careful consideration of factors that affect a capacitive electrode functional integrity, several different sizes of ECG electrodes were designed and tested with a pilot ECG device. A very small cotton-insulated copper tape electrode ($2.324cm^2$) was finally attained that could detect and measure bioelectric signal at about 500 um of distance from the subject's chest.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2006년도 춘계종합학술대회
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• pp.1023-1026
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• 2006

가정이나 병원 등 해상에서 위급한 환자를 모니터링 할 때 현재의 심전도 측정기의 전극센서가 불편할 경우가 많다. 구급차량 내에서나 선박에서 환자를 측정시 흔들림이 심하기 때문에 전극이 떨어져 측정이 쉽지가 않으며 또 환자의 몸에 지방분이나 습기가 많을 경우를 쉽게 붙어있지 않아 측정이 더욱 힘들어진다. 본 연구에서는 환자가 언제든지 전극을 붙이고 화장실이나 외출까지도 자유롭게 할 수가 있도록 하였으며 또 흉부에 쉽게 착용이 용이하도록 부드러운 벤드 형태로 설계되었다. 심전도의 전극소재로는 전기저항특성이 우수하고 피부 트러블이 거의 없는 금을 소재로 한 제품을 적용하였으며 광전용적맥파 및 말초체온 등을 추가로 설계하여 다중생체신호를 모니터링 할 수 있도록 구현하였다. 본 실험에서는 가승이나 늑골부위에서는 생체신호전달이 좋았으며, 환자의 복부부위에서는 생체신호가 아주 작게 검출되었다. 전극소재로 금 전극을 사용하여 일반적인 전극을 이용할 때 보다 신호 검출이 우수하다는 결과를 얻었으며. 일반적인 전극은 단순1회용으로 끝나지만 금 전극센서는 반영구적이면서도 환자가 이동시 접촉력이 우수하여 보다 정확한 데이터를 얻을 수가 있었다.

• International Journal of Advanced Culture Technology
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• 제4권4호
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• pp.45-50
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• 2016

This is a humanistic study to trace phenomena logically the comprehensive therapeutic mechanism of the human body which is coded by the smart emotion of the rated signal conveyed by the Rated Sijo. The Gestalt, which is structured in the form of therapeutic metastasis conveyed by sentences, is intended to embody the principle of human response. So, this researcher explored the metastatic structure toward Gestalt of original human being through the passage of foreground and background by ergonomic and chemical structure. In the meantime, this researcher focused on revealing the structure of the field of existence by the symbol system in which the therapeutic mechanism of the human body is embodied. As a result, the basic framework of Gestalt literary therapy, which contributes to the improvement of the Quality of Life metaphorized as a mechanism of the symbol system by the metastasis of literary therapy or the electrical operation of the human body. As a result, the human body as a conductor through literature has turned out to be an original Gestalt structure pursued by literature. In addition, it was analyzed that the human body would accept signals such as emotions and Rated Emotions planted in the sentence, and synapse them into the human physiological psycho analytical symbol system. Therefore, it has been confirmed possibility that human existent environment and trauma are separated from the whole universe can push fully implement therapeutic techniques toward totalization by a combination of literary devices, especially appropriate electric signal combination of the Rated Sijo.

• Annals of Clinical Neurophysiology
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• 제13권2호
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• pp.80-86
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• 2011

Background: A dry-type electrode is an alternative to the conventional wet-type electrode, because it can be applied without any skin preparation, such as a conductive electrolyte. However, because a dry-type electrode without electrolyte has high electrode-to-skin impedance, an impedance-converting amplifier is typically used to minimize the distortion of the bioelectric signal. In this study, we developed an active dry electroencephalography (EEG) electrode using an impedance converter, and compared its performance with a conventional Ag/AgCl EEG electrode. Methods: We developed an active dry electrode with an impedance converter using a chopper-stabilized operational amplifier. Two electrodes, a conventional Ag/AgCl electrode and our active electrode, were used to acquire EEG signals simultaneously, and the performance was tested in terms of (1) the electrode impedance, (2) raw data quality, and (3) the robustness of any artifacts. Results: The contact impedance of the developed electrode was lower than that of the Ag/AgCl electrode ($0.3{\pm}0.1$ vs. $2.7{\pm}0.7\;k{\Omega}$, respectively). The EEG signal and power spectrum were similar for both electrodes. Additionally, our electrode had a lower 60-Hz component than the Ag/AgCl electrode (16.64 vs. 24.33 dB, respectively). The change in potential of the developed electrode with a physical stimulus was lower than for the Ag/AgCl electrode ($58.7{\pm}30.6$ vs. $81.0{\pm}19.1\;{\mu}V$, respectively), and the difference was close to statistical significance (P=0.07). Conclusions: Our electrode can be used to replace Ag/AgCl electrodes, when EEG recording is emergently required, such as in emergency rooms or in intensive care units.