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JOURNAL OF SENSOR SCIENCE AND TECHNOLOGY

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수록정보
수록범위 : 1권1호(1992)~28권1호(2019) |수록논문 수 : 1,683
센서학회지
28권1호(2019년) 수록논문
최근 권호 논문
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1A Polymer-based Capacitive Air Flow Sensor with a Readout IC and a Temperature Sensor

저자 : Wonhyo Kim , Hyugman Lee , Kook-nyeong Lee , Kunnyun Kim

발행기관 : 한국센서학회 간행물 : 센서학회지 28권 1호 발행 연도 : 2019 페이지 : pp. 1-6 (6 pages)

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This paper presents an air flow sensor (AFS) based on a polymer thin film. This AFS primarily consists of a polymer membrane attached to a metal-patterned glass substrate and a temperature-sensing element composed of NiCr. These two components were integrated on a single glass substrate. The AFS measures changes in capacitance caused by deformation of the polymer membrane based on the air flow and simultaneously detects the temperature of the surrounding environment. A readout integrated circuit (ROIC) was also fabricated for signal processing, and an ROIC chip, 1.8 mm by 1.9 mm in size, was packaged with an AFS in the form of a systemin- package module. The total size of the AFS is 1 by 1 cm, and the diameter and thickness of the circular-shaped polymer membrane are 4 mm and 15 μm, respectively. The rate of change of the capacitance is approximately 11.2% for air flows ranging between 0 and 40m/s.

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2Intelligent Electronic Nose System for Detection of VOCs in Exhaled Breath

저자 : Hyung-gi Byun , Joon-bu Yu

발행기관 : 한국센서학회 간행물 : 센서학회지 28권 1호 발행 연도 : 2019 페이지 : pp. 7-12 (6 pages)

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Significant progress has been made recently in detection of highly sensitive volatile organic compounds (VOCs) using chemical sensors. Combined with the progress in design of micro sensors array and electronic nose systems, these advances enable new applications for detection of extremely low concentrations of breath-related VOCs. State of the art detection technology in turn enables commercial sensor systems for health care applications, with high detection sensitivity and small size, weight and power consumption characteristics. We have been developing an intelligent electronic nose system for detection of VOCs for healthcare breath analysis applications. This paper reviews our contribution to monitoring of respiratory diseases and to diabetic monitoring using an intelligent electronic nose system for detection of low concentration VOCs using breath analysis techniques.

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3Cardiac Disease Detection Using Modified Pan―Tompkins Algorithm

저자 : Amrita Rana , Kyung Ki Kim

발행기관 : 한국센서학회 간행물 : 센서학회지 28권 1호 발행 연도 : 2019 페이지 : pp. 13-16 (4 pages)

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The analysis of electrocardiogram (ECG) signals facilitates the detection of various abnormal conditions of the human heart. The QRS complex is the most critical part of the ECG waveform. Further, different diseases can be identified based on the QRS complex. In this paper, a new algorithm based on the well-known Pan-Tompkins algorithm has been proposed. In the proposed scheme, the QRS complex is initially extracted by removing the background noise. Subsequently, the R-R interval and heart rate are calculated to detect whether the ECG is normal or has some abnormalities such as tachycardia and bradycardia. The accuracy of the proposed algorithm is found to be almost the same as the Pan-Tompkins algorithm and increases the R peak detection processing speed. For this work, samples are used from the MIT-BIH Arrhythmia Database, and the simulation is carried out using MATLAB 2016a.

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4Analysis of Gate-Oxide Breakdown in CMOS Combinational Logics

저자 : Kyung Ki Kim

발행기관 : 한국센서학회 간행물 : 센서학회지 28권 1호 발행 연도 : 2019 페이지 : pp. 17-22 (6 pages)

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As CMOS technology scales down, reliability is becoming an important concern for VLSI designers. This paper analyzes gate-oxide breakdowns (i.e., the time-dependent dielectric-breakdown (TDDB) aging effect) as a reliability issue for combinational circuits with 45-nm technology. This paper shows simulation results for the noise margin, delay, and power using a single inverter-chain circuit, as well as the International Symposium on Circuits and Systems (ISCAS)'85 benchmark circuits. The delay and power variations in the presence of TDDB are also discussed in the paper. Finally, we propose a novel method to compensate for the logic failure due to dielectric breakdowns: We used a higher supply voltage and a negative ground voltage for the circuit. The proposed method was verified using the ISCAS'85 benchmark circuits.

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5유기 반도체 CuPccp LB초박막의 제작 및 특성

저자 : 조민재 ( Mean Jea Jho ) , 쑤양싸이양 ( Saiyang Xouyang ) , 이진수 ( Jin Su Lee ) , 안다현 ( Da Hyun Ahn ) , 정치섭 ( Chi Sup Jung )

발행기관 : 한국센서학회 간행물 : 센서학회지 28권 1호 발행 연도 : 2019 페이지 : pp. 23-29 (7 pages)

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A copper tetracumylphenoxy phthalocyanine (CuPccp) thin film was formed on an organic insulator film by Langmuir- Blodgett (LB) deposition for gas sensor fabrication. To increase the reproducibility of film transfer, stearyl alcohol was used as a transfer promoter. The structural properties of the CuPccp layers were optically monitored through attenuated total reflection and polarization-modulated ellipsometry techniques. The average thickness of a single layer of the CuPccp LB film was measured to be 2.5 nm. Despite the role of the transfer promoter, the stability of the layer transfer was not sufficient to ensure homogeneity of the LB film. This was probably due to the presence of aggregates in the molecular structure of the CuPccp LB film. Nevertheless, copper phthalocyanine polymorphism can be greatly suppressed by the LB arrangement, which appears to contribute to the improvement of electrical conductivity. The p-type semiconductor characteristics were confirmed by Hall measurements from the CuPccp LB films.

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6좌표변환 기반의 두 자세 정렬 기법 비교

저자 : 이정근 ( Jung-keun Lee ) , 정우창 ( Woo-chang Jung )

발행기관 : 한국센서학회 간행물 : 센서학회지 28권 1호 발행 연도 : 2019 페이지 : pp. 30-35 (6 pages)

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Inertial measurement units (IMUs) are widely used for wearable motion-capturing systems in the fields of biomechanics and robotics. When the IMUs are combined with optical motion sensors (hereafter, OPTs) for their complementary capabilities, it is necessary to align the coordinate system orientations between the IMU and OPT. In this study, we compare the application of two coordinate transformation- based orientation alignment methods between two coordinate systems. The first method (M1) applies angular velocity coordinate transformation, while the other method (M2) applies gyroscopic angle coordinate transformation. In M1 and M2, the angular velocities and angles, respectively, are acquired during random movement for a least-square algorithm to determine the alignment matrix between the two coordinate systems. The performance of each method is evaluated under various conditions according to the type of motion during measurement, number of data points, amount of noise, and the alignment matrix. The results show that M1 is free from drift errors, while drift errors are present in most cases where M2 is applied. Thus, this study indicates that M1 has a far superior performance than M2 for the alignment of IMU and OPT coordinate systems for motion analysis.

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7타원형 압전 에너지 하베스터의 기계적 모델링 연구

저자 : 최재훈 ( Jaehoon Choi ) , 정인기 ( Inki Jung ) , 강종윤 ( Chong-yun Kang )

발행기관 : 한국센서학회 간행물 : 센서학회지 28권 1호 발행 연도 : 2019 페이지 : pp. 36-40 (5 pages)

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Energy harvesting is an advantageous technology for wireless sensor networks (WSNs) that dispenses with the need for periodic replacement of batteries. WSNs are composed of numerous sensors for the collection of data and communication; hence, they are important in the Internet of Things (IoT). However, due to low power generation and energy conversion efficiency, harvesting technologies have so far been utilized in limited applications. In this study, a piezoelectric energy harvester was modeled in a vibration environment. This harvester has an oval-shaped configuration as compared to the conventional cantilever-type piezoelectric energy harvester. An analytical model based on an equivalent circuit was developed to appraise the advantages of the oval-shaped piezoelectric energy harvester in which several structural parameters were optimized for higher output performance in given vibration environments. As a result, an oval-shaped energy harvester with an average output power of 2.58 mW at 0.5 g and 60 Hz vibration conditions was developed. These technical approaches provided an opportunity to appreciate the significance of autonomous sensor networks.

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8마이크로볼로미터용 [(Ni0.3Mn0.7)1-xCux]3O4 박막의 제작 및 전기적 특성 분석

저자 : 최용호 ( Yong Ho Choi ) , 정영훈 ( Young Hun Jeong ) , 윤지선 ( Ji Sun Yun ) , 백종후 ( Jong Hoo Paik ) , 홍연우 ( Youn Woo Hong ) , 조정호 ( Jeong Ho Cho )

발행기관 : 한국센서학회 간행물 : 센서학회지 28권 1호 발행 연도 : 2019 페이지 : pp. 41-46 (6 pages)

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In order to develop novel thermal imaging materials for microbolometer applications, [(Ni0.3Mn0.7)1-xCux]3O4 (0.18 ≤ x ≤ 0.26) thin films were fabricated using metal-organic decomposition. Effects of Cu content on the electrical properties of the annealed films were investigated. Spinel thin films with a thickness of approximately 100 nm were obtained from the [(Ni0.3Mn0.7)1-xCux]3O4 films annealed at 380℃ for five hours. The resistivity (ρ) of the annealed films was analyzed with respect to the small polaron hopping model. Based on the Mn3+/Mn4+ ratio values obtained through x-ray photoelectron spectroscopy analysis, the hopping mechanism between Mn3+ and Mn4+ cations discussed in the proposed study. The effects of Cu+ and Cu2+ cations on the hopping mechanism is also discussed. Obtained results indicate that [(Ni0.3Mn0.7)1-xCux]3O4 thin films with low temperature annealing and superior electrical properties (ρ ≤ 54.83 Ω·cm, temperature coefficient of resistance > -2.62%/K) can be effectively employed in applications involving complementary metal-oxide semiconductor (CMOS) integrated microbolometer devices.

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9레이저 유도 그래핀 기반의 고성능 웨어러블 포도당 패치센서

저자 : 나중산 ( Joongsan Nah ) , 윤효상 ( Hyosang Yoon ) , 선성 ( Xing Xuan ) , 김지영 ( Jiyoung Kim ) , 박재영 ( Jaeyeong Park )

발행기관 : 한국센서학회 간행물 : 센서학회지 28권 1호 발행 연도 : 2019 페이지 : pp. 47-51 (5 pages)

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Sweat-based glucose sensors are being widely investigated and researched as they facilitate painless and continuous measurement. However, because the concentration of sweat glucose is almost a hundred times lower than that of blood glucose, it is important to develop electrochemical sensing electrode materials that are highly sensitive to glucose molecules for the detection of low concentrations of glucose. The preparation of a flexible and ultra-sensitive sensor for detection of sweat glucose is presented in this study. Oxygen and nitrogen are removed from the surface of a polyimide film by exposure to a CO2 laser; hence, laser-induced graphene (LIG) is formed. The fabricated LIG electrode showed favorable properties of high roughness and good stability, flexibility, and conductivity. After the laser scanning, Pt nanoparticles (PtNP) with good catalytic behavior were electrodeposited and the glucose sensor thus developed, with a LIG/PtNP hybrid electrode, exhibited a high order of sensitivity and detection limit for sweat glucose.

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10HMD용 발향장치 설계와 적용

저자 : 백민호 ( Min Ho Baek Yu ) , 김민구 ( Min Ku Kim ) , 금동위 ( Dong-wi Keum ) , 김정도 ( Jeong-do Kim )

발행기관 : 한국센서학회 간행물 : 센서학회지 28권 1호 발행 연도 : 2019 페이지 : pp. 52-57 (6 pages)

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Studies to augment emotion and immersion in multimedia content through olfactory stimulation are being increasingly conducted in the past two decades, and a variety of scent devices have been developed. Most of the scent devices are very large and heavy; consequently, they are installed on a table rather than being attached to the Head-mounted Display (HMD). Even if such devices are mounted on the HMD, it is not possible to control the scent density because of the size limitation, and it is not easy to be immersed in the experience because of the noise caused by the scent device. In order for an actual virtual reality or an augmented reality system to work efficiently with the scent device, three conditions - noiseless, a compact design, and concentration control- must be satisfied. In this study, we design a scent device that satisfies these three conditions. By using a miniature piezoelectric pump, a small size scent device is designed so that it can be easily attached to the lower end of the HMD, and hardly any noise is generated. Moreover, it is possible to control the concentration of the scent by controlling the piezoelectric pump using amplitude and frequency.

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1연안해역에서 석유오염물질의 세균학적 분해에 관한 연구

(2006)홍길동 외 1명심리학41회 피인용

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