• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2010년도 하계학술대회 논문집
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• pp.286-286
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• 2010

In this paper, we proposed that optimum installation methods and characteristics of the hybrid type flame-sensor. The hybrid type flame-sensor has the high responsive performance. This research introduced the characteristics of the hybrid type flame-sensor, it was consist of IR/UV flame detector and proposed the optimum installation methods of false alarm reduced to resemble fire.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2008년도 춘계학술대회 논문집 센서 박막재료연구회 및 광주 전남지부
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• pp.1-5
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• 2008

In this paper, we proposed that when combustible burn with ultraviolet radiation, introduce fire detector with sensor of private-use detectable light energy as ultraviolet in energy of electromagnetic-wave type radiate from flame. This research using ultraviolet flame sensor is pyro-electric ultraviolet sensor based black body radiation theory. To have high sensibility and to gain proper output voltage, it has high responsive performance. This research introduced UV flame detector and proposed method of false alarm reduced to resemble fire. the result proposed the prevention and extinction of fire technique degree, certificated operation of detector.

• 한국분무공학회지
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• 제7권2호
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• pp.1-6
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• 2002

It is necessary to develope a high frequency diode laser sensor system based on the absorption spectroscopy for the measurement of temperature of the spray flame. DFB diode laser operating near $2.0{\mu}m$ was used to scan over selected $H_2O$ transitions near $1.9{\mu}m\;and\;2.2{\mu}m$, respectively. The measurement sensitivity at wide range of sweep frequency was evaluated using multi-pass cell containing $CO_2$ gas. This diode laser absorption sensor with high temporal resolution up to 10kHz was applied to measure the gas temperature in the spray flame region of liquid-gas 2-phase counter flow flame. The successful demonstration of time series temperature measurement in the spray flame gives us motivation of trying to establish non-intrusive temperature measurement method in the practical spray flame.

• Journal of Mechanical Science and Technology
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• 제17권1호
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• pp.139-145
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• 2003

Diode laser sensor is conducted to measure the gas temperature in the liquid-gas 2-phase counter flow flame. C$\_$10/H/ sub 22/ and city gas were used as liquid fuel and gas fuel, respectively. Two vibrational overtones of H$_2$O were selected and measurements were carried out in the spray flame region stabilized the above gaseous premixed flame. The path-averaged temperature measurement using diode laser absorption method succeeded in the liquid fuel combustion environment regardless of droplets of wide range diameter. The path-averaged temperature measured in the post flame of liquid-gas 2-phase counter flow flame showed qualitative reliable results. The successful demonstration of time series temperature measurement in the liquid-gas 2-phase counter flow flame gave us motivation of trying to establish the effective control system in practical combustion system. These results demonstrated the ability of real-time feedback from combustor inside using the non-intrusive measurement as well as the possibility of application to practical combustion system. Failure case due to influence of spray flame was also discussed.

• 한국방재학회 논문집
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• 제10권5호
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• pp.49-54
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• 2010

목조문화재의 화재특성을 보면 화재전파가 빠르고 화재가 발생하면 전소로 이어질 가능성이 큰 특징을 가지고 있다. 그러므로 화재의 예방과 초기 진압을 위해서는 상황을 정확히 인지할 수 있는 기술적인 대응과 더불어 인지된 문제를 조기에 대처할 수 있는 시스템이 필요하다. 이러한 기술을 첨단 유비쿼터스 기술에 의한 상황 감지, 그리고 상황에 따른 빠른 대처 즉, 진압에 활용하기 위해 본 연구에서는 유비쿼터스 센서 네트워크(USN) 기술, 불꽃감지기, 이미지 센서, USN 기반 문화재 방재 응용사례, 오작동 확인시스템 구현 등에 대해서 살펴보고 유비쿼터스형 문화재 방재시스템에 대해 불꽃감지기 오작동 확인시스템에 대해 실험하여 연구결과를 제시하였다.

• 센서학회지
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• 제5권6호
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• pp.43-50
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• 1996

대부분을 수입에 의존하고 있는 연료의 연소효율 증대, thermal NOx의 배출 저감은 화염특성 감지 및 분석을 통해서도 가능하다. 연소시스템에서 화영의 flicker에 대한 정보를 퓨리어 변환을 통해 frequency domain data 로 변환시켜 해석한 결과, 일반적으로 연소 영역의 난류강도가 커질수록 frequency와 강도는 커졌으며, 화염의 강도는 연료 공급 유량이 커질수록 항께 커졌다. 선회도가 $0{\sim}1.16$ 범위에서 커질 때, 화염의 강도는 작아졌다. 시험 연소로의 관찰구를 통하여 얻은 신호는 화염유무에 따라 그 차이가 매우 커서 화염의 존재 유무를 쉽게 알 수 있었다. 발생되는 NOx의 양은 화염강도와 밀접한 관계가 있음을 보여주었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 하계학술대회 논문집
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• pp.215-218
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• 2001

A flame detector responds either to radiant energy visible to the human eye or outside the range of human vision. Such a detector is sensitive to glowing embers, coals, or flames which radiate energy of sufficient intensity and spectral quality to actuate the alarm. An infra-red detectors can respond to the total IR component of the flame alone or in combination with flame flicker in the frequency range of 5 to 30 Hz. A major problem in the use of infrared detectors receiving total IR radiation is the possible interference of solar radiation in the infrared region. When detectors are located in places shielded from the sun, such as vaults. filtering or shielding the unit from the sun's rays is unnecessary. In this study, we proposed method for redue a false alarm with using filtering & sensor technology for distinguish of causes of raise a false alarm and pure flame.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 춘계학술대회 논문집 기술교육전문연구회
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• pp.8-11
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• 2003

We propose that when combustible burn with contain carbon, introduce fire detector with sensor of private-use detectable light energy as infrared and ultraviolet in energy of electromagnetic-wave type radiate from flame, method for correct discrimination to resemble fire produce false alarm of detector such as sun light, hot object radiation, are welding. This research using infrared sensor is pyroelectric infrared sensor based black body radiation theory. Ultraviolet sensor is uv Tron using gas multiplication effect to current discharge and photoelectric effect of metal. To have high sensibility and to gain proper output voltage, it has high responsive performance. This research introduced UV/IR compound type flame detector and proposed method of false alarm reduced to resemble fire. The result propres the prevention and extinction of fire technique degree, certificated operation of detector.

• Journal of Advanced Marine Engineering and Technology
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• 제25권1호
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• pp.115-123
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• 2001

This study describes the combustion characteristics under various condition of air excess ratio and ignition timing in a 2-valve gasoline optically accessible engine with swirl control valve(SCV). It adapted three different types of SCA(open ration 72.5%, 78%, 89%) to strengthen a swirl flow. Pressure data were acquired using pressure sensor to investigate the effect of swirl flow on combustion, and from these pressure data, IMEP(indicated mean effective pressure) and MFB(mass fraction burnt)were calculated to explain burn rate and flame speed. From acquired flame images, inspected the flame propagation direction, flame area, and flame centroid, Flame propagation direction was shown different tendency between with/without SCV, and flame area with SCV was faster and larger than that of conventional engine. Finally, the representative flame image at each crank angle were acquired by PDF method to verify flame growth process. It is found that strengthened swirl flow is more beneficial for faster and stable combustion.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 춘계학술대회논문집
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• pp.231-234
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• 2005

본 논문에서는 화재 감지 센서(UV TRON R2868)와 센서 구동 회로를 이용하여 일반 교류 전원을 스위칭할 수 있는 장치를 제안하고 이를 구현하였다. 구성된 전원 구동 회로의 해석을 위해서 OrCAD 프로그램을 사용하였고, 이를 실제 구동 회로 세트에 부가하여 구성한 후 실험하였다. 실험 결과 주어진 환경에서 불꽃이나 화염만을 감지하여 경보해 주는 특성을 비교적 안정적으로 수행하였으며, 그 결과는 불꽃이나 화염을 감지 후 경보를 필요로 하는 실제적인 활용 분야에 적용할 경우 회로설계의 자료에 참조 할 수 있으리라 사료된다. 이 결과를 바탕으로 화재 감지 센서와 구동 회로를 이용한 전원 개폐 장치의 동작이 실제로 활용 가능함을 검증할 수 있었다.