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RISS 인기검색어
- 검색키워드
- 저자 : 김형표 ( Se Kwang Park (검색결과 4 건)
- 무료
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김형표(Hyung Pyo Kim),박세광(Se Kwang Park) 한국센서학회 1999 센서학회지 Vol.8 No.5
An automobile hot-film air flow sensor is deposited with platinum by sputtering method, patterned by photoresisted lift-off method, annealed in 1000 ℃ and passivated with PI-2723. The TCR of the fabricated hot-film is about 3500 ppm/℃. In the experiment, the output voltage of the sensor is in proportional to the fourth power root in the air mass flow range of 300 kg/h. The error in the full flow range is about ± 7%. In the range of air temperature of -20 ℃ ∼ 120 ℃, the error is about ± 1% that is ±2% lower than that of the reference sensor. Therefore, the fabricated hot-film air flow sensor satisfies the specification for automobile. Lower temperature error of the sensor provides to control the precise air/fuel ratio of automobile engine and results in improvement of a fuel mileage and the less amount of toxic oases emitted bY automobile.
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박세광,김형표 ( Se Kwang Park,Hyoung Pyo Kim ) 한국센서학회 1992 센서학회지 Vol.1 No.1
A constant temperature type of flow sensor using a solid state micromachining technology was developed for measuring the velocity of gas or liquid. It was designed to detect only the heat convection related to flow velocity. Other heat transfer terms and common mode interferences are canceled by differentiating both reference and exposed flow sensor. It employs the principle that the change of current through the sensing element can be used to measure the flow velocity. An experimental study of the behavior on this flow sensor was performed in a narrow tube(diameter : 8mm) for city water. The relation between power consumption of the flow sensor and square-root of flow velocity is almost linear in the low velocity range(0-200 cm/sec).
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박세광,김형표,Park, Se-Kwang,Kim, Hyoung-Pyo 한국센서학회 1992 센서학회지 Vol.29 No.3
기체와 액체의 유숙을 측정하기 위한 반도체 기술을 이용한 소형의 정온도형 유속센서가 제작되었다. 유속센서는 유속에 영향을 받는 대류 열전달만을 검출하도록 설계되었고, 다른 종류의 열전달과 간섭효과는 기준센서의 사용으로 상쇄되도록 하였다. 원리는 유동에 의한 센서 양단전류의 변화로 유속을 측정하는 것이다. 이 유속센서의 실험은 수돗물로 가는 관(지름 8mm)을 사용하여 수행되었다. 그 결과 센서의 소비전력과 유속의 제곱근 사이의 관계는 유속이 0-200cm/sec 범위에서 거의 선형으로 나타났다. A constant temperature type of flow sensor using a solid state micromachining technology was developed for measuring the velocity of gas or liquid. It was designed to detect only the heat convection related to flow velocity. Other heat transfer terms and common mode interferences are canceled by differentiating both reference and exposed flow sensor. It employs the principle that the change of current through the sensing element can be used to measure the flow velocity. An experimental study of the behavior on this flow sensor was performed in a narrow tube(diameter : 8mm) for city water. The relation between power consumption of the flow sensor and square-root of flow velocity is almost linear in the low velocity range(0-200 cm/sec).
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