• 센서학회지
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• 제12권1호
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• pp.24-33
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• 2003

This research is about a comfort sensing system for human environmental monitoring using a one-bodied humidity and temperature sensor and an air flow sensor. The thermal comfort that a human being feels in indoor environment has been known to be influenced mostly by six parameters, i.e. air temperature, radiation, air flow, humidity, activity level and clothing thermal resistance. Considering an environmental monitoring, we have designed and fabricated a one-bodied humidity and temperature sensor and an air flow sensor that detect air relative humidity, temperature and air flow in human environment using surface micromachining technologies. Micro-controller calculates a PMV (predicted mean vote) and CSV (comfort sensing vote) with sensing signals and display a PMV on LCD (liquid crystal display) for human comfort on indoor climate. Our work has demonstrated that a comfort sensing system can provide an effective means of measuring and monitoring the indoor comfort sensing index of a human being. Experimental results with simulated environment clearly suggest that our comfort sensing system can be used in many applications such as air conditioning system, feedback controlling in automobile, home and hospital etc..

• 공업화학
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• 제9권4호
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• pp.554-560
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• 1998

포스포늄 염을 포함하는 감습성 전해질 고분자 결로센서를 vinylbenzyl triphenyl phosphonium chloride(VTPC)/styrene=3/7의 공중합체로부터 제조하였다. 감습막은 금/알루미나 전극에 침적법에 의하여 도포하였으며 $25^{\circ}C$의 70%RH, 80%RH, 90%RH, 그리고 95% RH에서 임피던스는 $11M{\Omega}$, $980k{\Omega}$, $50k{\Omega}$, 그리고 $11k{\Omega}$를 각각 보여 주어 감습 특성은 결로 센서로서의 특성에 매우 적합하였으며 $15{\sim}35^{\circ}C$에서 온도 의존성 계수는 $-0.25%RH/^{\circ}C$이었으며 히스테리시스는 ${\pm}2%RH$ 이내에 존재하였다. 응답 속도는 70%RH에서 98%RH로 변화할 때 45초이었다. 신뢰성 시험으로서 온도 사이클, 습도 사이클, 고온 고습 저항성, 전기 인가, 장기 방치, 그리고 내수성을 측정하여 결로 센서로서의 적합성을 평가하였다.

• 대한전기학회논문지
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• 제45권1호
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• pp.93-99
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• 1996

The formation properties and oxidation mechanism of electrochemically oxidized porous silicon(OPS) films have been studied. To examine the humidity-sensitive properties of OPS films, surface-type and bulk-type humidity sensors were fabricated. The oxidized thickness of porous silicon layer(PSL) increases with the charge supplied during electrochemical humidity sensor shows high sensitivity at high relative humidity in low temperature. The sensitivity and linearity can be improved by optimizing a porosity of PSL. (author). refs., figs.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.1126-1135
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• 1996

This study was conducted to select the sensors for measuring temperature, relative humidity, and air velocity among the major environmental factors affecting the pig productivity as a part of the study for the optimum production system model development of pig-housing. The study results are summarized as the follows : Two sensors , HMP233L and HANI, were tested for measuring temperature and relative humidity , Test results were analyzed by the statistical methods. And the sensor, HMP233L was selected as a proper sensor for temperature sand relative humidity measurement . An air velocity sensor was tested. Test results showed that its accuracy was low and incongruent for the air velocity measurement when it was lower than 4m/s.

• 한국항행학회논문지
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• 제24권6호
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• pp.627-632
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• 2020

본 논문에서는 폴리비닐알코올로 코팅된 마이크로스트립 결함 접지 구조 기반 마이크로파 센서를 이용한 습도 센서의 개발에 대하여 연구하였다. 인터디지털 커패시터 모양의 결함 접지 구조를 마이크로스트립 선로의 접지면에 추가하여 피시험물의 유전율 변화에 민감한 고감도 마이크로파 센서를 설계하였다. 습도에 따라 유전율이 변하는 고분자 물질인 폴리비닐알코올을 제안된 센서의 결함 접지 구조에 얇은 두께로 코팅하였고, 습도에 따른 마이크로파 센서의 전달계수의 공진 주파수와 크기의 변화를 측정하였다. 온습도 챔버를 사용하여 25도에서 상대습도를 40%에서 80%까지 10% 간격으로 증가시켰을 때 전달계수의 공진 주파수는 1.475 GHz에서 1.449 GHz로 감소하였고, 크기는 -32.90 dB에서 -25.67 dB로 증가하였다.

• 폴리머
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• 제33권1호
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• pp.19-25
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• 2009

내수성 감습막으로 사용하기 위하여 이온넨을 포함하는 광경화성 반응성 올리고머(PIDM)로부터 새로운 종류의 전해질 고분자를 제조하였다. PIDM, hexamethylene dimethacrylate(HDM), pentaerythritol triacrylate dimer(SP1013) 및 광개시제를 혼합하여 전극에 광개시 라디칼 중합과 동시에 도포하였다. 또한, 센서의 내수성 그리고 고온/고습에서의 안정성을 증진시키기 위하여 전극 기판에 비닐기를 가지는 실란 카플링제를 사용하여 전처리 하였다. 가교화된 이온넨으로 이루어진 습도센서의 상대습도에 대한 저항을 측정하였을 때, 저항은 20%$\sim$90%RH 상대습도 영역에서 $10^3$의 값이 변화하였으며 이것은 대기의 습도를 측정하는데 요구되는 특성을 만족시키고 있다. 그 밖에 온도의존성, 히스테리시스 응답 및 회복속도, 내수성 그리고 고온/고습에서 장기 안정성을 측정하여 습도센서로서 특성을 평가하였다.

• 농업과학연구
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• 제46권1호
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• pp.57-65
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• 2019

The purpose of this study was to develop an environment field monitoring system to measure crop growth. The environment field monitoring system consisted of sensors, a data acquisition system, and GPS. The sensors used in the environment field monitoring system consisted of an ambient sensor, a soil sensor, and an intensity sensor. The temperature and humidity of the atmosphere were measured with the ambient sensor. The temperature, humidity, and EC of the soil were measured with the soil sensor. The data acquisition system was developed using the Arduino controller. The field monitoring data were collected before a rainy day, on a rainy day, and after the rainy day. The measured data using the environment field monitoring system were compared with the Daejeon regional meteorological office data. The correlation between the data from the environment field monitoring system and the data from the Daejeon regional meteorological office was analyzed for performance evaluation. The correlation of the temperature and humidity of the atmosphere was analyzed because the Daejeon regional meteorological office only provided data for the temperature and humidity of the atmosphere. The correlation coefficients were 0.86 and 0.90, respectively. The result showed a good correlation between the data from the environment field monitoring system and the data from the Daejeon regional meteorological office. Therefore, the developed system could be applied to monitoring the field environment of agricultural crops.

• 센서학회지
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• 제19권5호
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• pp.337-341
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• 2010

In this work, the nanocrystalline ZnO/polycrystalline(poly) aluminum nitride(AlN)/ Si-layered structure was fabricated for humidity sensor applications based on surface acoustic wave(SAW). The ZnO film was used as a sensitive material layer. The ZnO and AlN(0002) were deposited by a sol-gel process and a pulse reactive magnetron sputtering, respectively. The ZnO sensitive films coated on AlN have a hexagonal wurtzite structure after the thin films annealed at $400^{\circ}C$, $500^{\circ}C$ and $600^{\circ}C$. The surface of the film exhibits sponginess and a nanometer particle size(below 50 nm). The largest shift in the frequency response was at approximately 200 kHz(the relative humidity: 10 %~90 %) for the structure annealed at $400^{\circ}C$. The effect of the change in the environmental temperature on the frequency response of the SAW humidity sensor was also investigated.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 춘계학술대회
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• pp.567-569
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• 2016

본 논문에서는 오픈소스플랫폼인 아두이노를 활용하여 온도, 습도 센서에서 받은 데이터 값을 시리얼 모니터에서 출력하고, 블루투스 모듈을 이용하여 블루투스 통신을 통해 안드로이드 어플리케이션으로 온도와 습도에 대한 데이터 값을 스마트폰에서 모니터링 할 수 있는 시스템을 제작하였다. 제작된 시스템을 활용함으로써 실시간으로 온도, 습도를 현장에서 모니터링이 필요한 분야에서 사용할 수 있다.

• 센서학회지
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• 제26권1호
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• pp.50-55
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• 2017

The measurement of absolute humidity of gases is essential in many industries. The effect of temperature on aluminum oxide and chilled mirror dew-point hygrometers is investigated. The temperature of laboratory, pipe line, and sensor is varied and the dew point is measured by two different aluminum oxide hygrometers. In all cases, the dew point of hygrometers is increased as the temperature is elevated. The reason behind this observation is due to desorption of water from the inside of pipe line and/or sensor surroundings at elevated temperature that result in the increase of the absolute humidity. Moreover, the sensor itself shows a certain degree of temperature dependency in sensing the humidity especially at low temperature. It is also studied that chilled mirror dew-point hygrometer may indicate a higher dew point than the reference at high temperature because the cooling capability of mirror is decreased at high temperature. Our study will provide evidences in the incorporation of the temperature effect as uncertainty factors in the standard calibration procedure for dew point hygrometers.