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초음파를 이용한 수소 연료 자동차용 알루미늄 박판 기반 수소 검출 센서
송형두(Hyeong-Doo Song),김시습(Si-Seup Kim),전인수(In-Su Jeon),양성모(Sung-Mo Yang),기창두(Chang-Doo Kee) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
We have developed an aluminum thin plate based hydrogen sensor to detect hydrogen leakage of a hydrogen fuel cell vehicle using ultrasonic wave. This sensor consists of a piezoelectric sensor which generates and receive ultrasonic wave, and an aluminum plate coated with palladium and platinum. Ultrasonic wave is guided and propagated through aluminum plate coated with palladium and platinum. In situation of hydrogen leakage, the density of the palladium layer is changed because hydrogen molecules were adsorbed and inflated in palladium. Futhermore, the changed density of the palladium layer causes the change of the propagation behavior of the ultrasonic wave. As a result, the amplitute of output voltage corresponding to that of wave has gradually damped by increased concentration of hydrogen gas. According to this study, it is confirmed the aluminum thin plate based hydrogen sensor is suitable to detect the hydrogen leakage of a hydrogen fuel cell vehicle.
송형두(Hyeong-Doo Song),김시습(Si-Seup Kim),기성종(Seong-Jong Ki),김현일(Hyun-Il Kim),전인수(In-Su Jeon),기창두(Chang-Doo Kee) 한국자동차공학회 2011 한국자동차공학회 지부 학술대회 논문집 Vol.2011 No.9
We recently developed a Hydrogen Detecting Sensor based on ultrasonic wave using optical-fiber to detect the hydrogen leakage. This sensor consists of simple structure by piezoelectric and optical-fiber. A piezoelectric generates and receives ultrasonic wave because this sensor is fabricated by pulse-echo system. And an optical-fiber coated with palladium and platinum. Ultrasonic wave is transmitted through optical-fiber. In hydrogen environment, the volume of palladium is expanded now that hydrogen molecules were adsorbed and inflated in palladium. and the expanded volume of palladium changes the propagation behavior of the ultrasonic wave. So, we can find the changed output signal in comparison with input signal. Moreover the amplitude of output signal gradually decreased according to increasement of hydrogen concentration. As a result of this study, it is confirmed a Hydrogen Detecting Sensor based on Ultrasonic-Optical Fiber is suitable as a sensor of detecting hydrogen gas.
수소 연료전지 자동차용 초음파-광섬유 수소감지센서 및 모니터링 시스템 개발
송형두(Hyeong-Doo Song),김시습(Si-Seup Kim),기창두(Chang-Doo Kee),전인수(In-Su Jeon),양성모(Sung-Mo Yang) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
We recently developed a hydrogen detecting sensor based on ultrasonic wave using optical-fiber detecting the hydrogen and monitoring system. This sensor is composed of an optical-fiber and an piezoelectric. Piezoelectric generates and receives ultrasonic wave. And an optical-fiber coated with palladium and platinum. In hydrogen environment, the volume of palladium is expanded because hydrogen were adsorbed in palladium. And the volume of palladium changes the propagation behavior of the ultrasonic wave. And now, we find the changed output signal in comparison with input signal. Furthermore we develop the monitoring system of hydrogen detecting sensor. The hydrogen monitoring system is composed of three part that is ultrasonic optical hydrogen sensor part, data acquisition server part and client part. The monitoring program is provide the concentration of hydrogen gas monitoring and database management, the remote monitoring by the ethernet(TCP/IP) network. As a result of this study, it is confirmed a hydrogen monitoring system based on utrasonic-optical fber is suitable for monitoring the hydrogen gas.
송형두(Hyeong-Doo Song),김시습(Si-Seup Kim),기창두(Chang-Doo Kee),전인수(In-Su Jeon),양성모(Sung-Mo Yang) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
We recently developed the exchangeable hydrogen detecting sensor based on ultrasonic-aluminum to detect an explosion by hydrogen leakage. This sensor consists of a piezoelectric and aluminum plate coated with palladium and platinum. A piezoelectric generates and receives ultrasonic wave because this sensor is fabricated by pulse-echo system. Ultrasonic wave generated from a piezoelectric is guided and propagated through aluminum plate coated with palladium and platinum. In situation of hydrogen, volume of the palladium layer is expanded because hydrogen molecules were adsorbed in palladium and inflated slightly. In the result of this, output signal has decreased and the amplitude has damped by increasing concentration of hydrogen gas. According to this study, developed an exchangeable hydrogen detecting sensor is suitable to detect an explosion by hydrogen.