• 대한화학회지
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• 제48권3호
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• pp.266-272
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• 2004

소형 고체상 전극에 단일 조성 실온 경화형(one-component room temperature vulcanizing type) 실리콘러버 730(730 RTV)을 지지체로 도입하여 가소제가 필요 없는 탄산이온선택성 전극막을 개발하였다. 본 연구에서 최적화된 탄산이온선택성 전극막의 조성은 85.75 wt%의 730 RTV, 11.08 wt%의 trifluoroacetyl-p-decylbenzene(TFADB), 3.17 wt%의 tridodecyl-methylammonium chloride(TDMACl)로 제조 되었고, 우수한 전기화학적 특성(감응기울기 (26.3 mV/dec.), 선택성($logKT^{pot}_{CO_{2},Cl^-}$= -4.00, $logKT^{pot}_{TCO_{2},Sal^-}$=1.69), 검출한계(4.0${\times}10^{-4}M$))을 보였으며, 이와 같은 조성의 막을 도입한 평면형 고체상 센서는 60일 이상 초기특성을 유지하였다.

• 한국전기전자재료학회논문지
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• 제33권5호
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• pp.350-354
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• 2020

In this study, a pressure sensor for each displacement was fabricated based on the silicon-based pressure sensor obtained through simulation results. Wires were bonded to the pressure sensor, and a piezoresistive pressure sensor was inserted into the printed circuit board (PCB) base by directly connecting a micro-electro-mechanical system (MEMS) sensor and a readout integrated circuit (ROIC) for signal processing. In addition, to prevent exposure, a non-conductive liquid silicone was injected into the sensor and the entire ROIC using a pipette. The packaging proceeded to block from the outside. Performing such packaging, comparing simple contact with strong contact, and confirming that the measured pulse wavelength appears accurately.

• 대한화학회지
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• 제41권12호
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• pp.653-660
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• 1997

Tetradecyltrimethylammonium chloride(TDTMACl)을 첨가한 실리콘러버-지지체 전극막은 생체시료중 염화이온의 측정시 보다 향상된 전기화학적 특성을 나타내기 위하여 사용되었다. 이때 최적화된 전극막의 조성비는 95.4 wt% 실리콘러버, 4.6 wt% TDTMACl이며 이 전극막의 pH 감응성은 pH 6-10 영역에서 무시할 수 있었다. 이들 전극막들의 염화이온에 대해 감응기울기는 10-300 mM 영역에서 -3.75 mV/decade로 이론적인 Nernstian 감응기울기에는 못 미쳤으나 살리실레이트 이온 등 다른 음이온에 대한 선택성은 매우 우수하였다: KpotCl,NO3=1.3, KpotCl,I=2.0, KpotCl,Sal=0.8, KpotCl,SCN=2.0, KpotCl,ClO4=0.8. 또한 실리콘러버-지지체 전극막은 PVC-지지체 전국막에 비해 고체상 전극표면에 대한 접착력이 우수하므로 CWE형 고체상 전극에 도입되었을 때 향상된 전극수명을 나타내었다. 이들 고체상 전극들은 35일까지 염화이온에 대한 감응기울기나 살리실레이트 이온에 대한 감응성에 변화없이 우수하게 작동함을 알 수 있었다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.136-141
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• 2007

This paper introduces an artificial neuron which is a nano composite continuous sensor. The continuous nano sensor is fabricated as a thin and narrow polymer film sensor that is made of carbon nanotubes composites with a PMMA or a silicone matrix. The sensor can be embedded onto a structure like a neuron in a human body and it can detect deteriorations of the structure. The electrochemical impedance and dynamic strain response of the neuron change due to deterioration of the structure where the sensor is located. A network of the long nano sensor can form a structural neural system to provide large area coverage and an assurance of the operational health of a structure without the need for actuators and complex wave propagation analyses that are used with other methods. The artificial neuron is expected to effectively detect damage in large complex structures including composite helicopter blades and composite aircraft and vehicles.

• 센서학회지
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• 제11권3호
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• pp.138-144
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• 2002

스테인레스 봉입형 압력센서를 제작하기 위하여 먼저 반도체 제조 및 식각 공정을 통하여 반도체 압력센서를 제작하였다 그리고 이를 glass molding된 스테인레스 housing에 올려놓고 $50\;{\mu}m$ 두께의 스테인레스 박판을 용접한 후 실리콘 오일을 채워 넣고 봉입하여 압력 범위 10 bar 센서를 완성하였다. 이와 같이 제작한 센서와 XTR105 발신기 전용 회로를 결합하여 $4{\sim}20\;mA$ 출력의 압력 발신기를 제작하고 그 특성을 조사하였다. 온도 보상 전 정확도는 ${\pm}5%$ FS이었으나 보상 후 정확도 ${\pm}1%$ FS로 개선되었다.

• 구강회복응용과학지
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• 제23권1호
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• pp.21-30
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• 2007

Despite of the successful clinical performance of implants, it is still lacking of the knowledge of changes in implant occlusion. The purpose of this study was to evaluate the changes of infraocclusal contact after clinical occlusal function of implant. Twenty patients(38 implants) were recalled during 10 months after placement of implant prosthesis. Occlusion changes were investigated at placement, placement 1 months, 4 months and 10 months serially with silicone bite material and T-Scan II sensor. Bony changes were also evaluated with periapical radiographs. The changes of silicone thickness and T-Scan II sensored areas were statistically analyzed with repeated measured ANOVA and the Scheffe's post-hoc test at the 95% significance level. The following results have been made based on this study: 1. Alveolar bone loss was within 0.20mm and it was generally concluded within physiologic level. 2. There were no statistically significant differences in the thickness changes of silicone material at 1 month and 4 months of occlusal function. However, there was statistically significant difference at 10 months of occlusal function (p<0.05). 3. There was no statistically significant difference in changes of occlusal contact area in T-Scan II at 1 month and 4 months of occlusal function, but there was statistically significant difference at 10 months of occlusal function (p<0.05). Conclusively, as time goes by, implant occlusion to be formed infraocclusion was to be far close and increased occlusal contact. However, it was not observed destructive bone resorption in periapical radiographs and any other side effects.

• 대한기계학회논문집A
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• 제38권11호
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• pp.1299-1307
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• 2014

본 논문은 감도가 낮고 정밀한 족적센서의 특성에 대하여 연구한 논문이다. 이를 위하여 센서의 형상 변수 조절 범위를 낮게 선정하였다. 센서의 감도 해석으로 2차원 해석 모델을 사용할 경우 실험값과 비교한 결과 오차가 많이 나는 것을 확인하였다. 따라서 이 오차를 개선하기 위하여 3D 기반의 새로운 해석 모델을 적용시켜 재해석 하였고, 이를 실험값과 비교한 결과 오차가 개선되었음을 확인할 수 있었다.

• KSBB Journal
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• 제10권2호
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• pp.126-130
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• 1995

초산발효 중 에탄올 농도를 On-line으로 측정하기 위해 막가스 센서를 개발하였다. 에탄올이 함유된 발효액은 실리콘막을 통해 투과되고 Carrier gas로 사용된 Synthetic air에 의해 운반되어 반도체형 가 스센서에 감지되도록 설계하였다. 이 때 실리콘막의 두께가 O.5mm이고 Carrier gas의 유속이 20ml/mim이었을 때 막가스 센서의 감도가 가장 높았다. 막가스센셔의 저항치는 측정하고자 하는 에탄올 농 도에 따라 변하였고 이 저항치는 전위차로 변환되어 출력되었다. 제작된 막가스센서의 Calibration CUf ve를 작성하였고 실제로 조업 중인 초산 발효조의 발효액 중 에단올 농도의 On-line 측정이 가능하였 으며 이를 Gas chromatography에 의한 분석치와 비교한 결과 에단올 농도가 $0∼70g/\ell$의 범위에서 서로 상관관계를 나타내어 이러한 막가스센서가 초산발효와 같은 여러 생물공정의 모니터링과 제어에 이용이 가능함을 확인하였다.

• Journal of Acupuncture Research
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• 제39권2호
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• pp.77-88
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• 2022

The purpose of this review was to identify research trends in acupuncture training systems and models and to analyze acupuncture training using phantom models. Articles on acupuncture training were retrieved from domestic and foreign electronic databases (PubMed, CNKI, CiNii, NDSL, KISS, RISS and KMBase). The search included studies conducted from January 1, 2010 to October 1, 2021. Acupuncture training was analyzed by categorization into acupoint location training and needling training. Acupuncture training was most frequently studied in China, acupoint location training was the most studied in 2012, and needling training was the most studied in 2013 and 2020. Among them, a silicone model with a sensor was used for training in acupoint location, and silicone and agarose gel were frequently used for needling training. Classifications of the phantom models for needling training by topic included phantom development, phantom-based education and evaluation system, phantom-based quantitative measurement, comparison of kinematic characteristics of hand motion between experts and beginners, and phantom models for acupoint location and needling training. Further research on the development of acupuncture practice training systems to improve practical skills is needed.

• 로봇학회논문지
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• 제19권2호
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• pp.221-228
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• 2024

As the importance of cardiovascular health is highlighted, research on its correlation with blood pressure, the most important indicator, is being actively conducted. Therefore, extensive clinical data is essential, but the measurement of the central arterial blood pressure waveform must be performed invasively within the artery, so the quantity and quality are limited. This study suggested a mock circulatory robot and artificial aorta to reproduce the blood pressure waveform generated by the overlap of forward and reflected waves. The artificial aorta was fabricated with biomimetic silicone to mimic the physiological structure and vascular stiffness of the human. A pressurizing chamber was implemented to prevent distortion of the blood pressure waveform due to the strain-softening of biomimetic silicone. The reproduced central arterial blood pressure waveforms have similar magnitude, shape, and propagation characteristics to humans. In addition, changes in blood pressure waveform due to aging were also reproduced by replacing an artificial aorta with various stiffness. It can be expanded to construct a biosignal database and health sensor testing platform, a core technology for cardiovascular health-related research.