Journal of the Korea Convergence Society (한국융합학회논문지)

Korea Convergence Society (한국융합학회)
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Analysis of Receiving sensitivity according to Contact Surface Change of Transmit-Receiver Ultrasonic Sensor for Fuel Level Measurement in CNG Tank

CNG 탱크 내 연료량 계측을 위한 송·수신 초음파 센서의 접촉면 변경에 따른 수신 감도 분석

  • Kim, Nam-Wook (Department of Mechanical Engineering, Graduate School, Kongju National University) ;
  • Im, Seok-Yeon (Department of Automotive Engineering, Tongmyeong University) ;
  • Choi, Doo-Seuk (Division of Mechanical &Automotive Engineering, Kongju National University)
  • 김남욱 (공주대학교 대학원 기계공학과) ;
  • 임석연 (동명대학교 자동차공학과) ;
  • 최두석 (공주대학교 기계자동차공학부)
  • Received : 2018.02.28
  • Accepted : 2018.04.20
  • Published : 2018.04.28
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Abstract

This paper is studied, as basic research for measuring the accurate fuel amount of the CNG tank by using the transmit-receive ultrasonic sensor, the receiving sensitivity according to changed the pressure inside the tank and the contact surface of the ultrasonic sensor is analyzed. Measurement was carried out while changing the contact surface of the tank and the sensor to three shapes of Point, Line, and Surface and charging the pressure in the tank at an interval of 1 bar from 0 bar to 5 bar. Experiment results, as the pressure in the tank increased the tendency of the received signal value of the ultrasonic sensor to decrease was confirmed. As the contact area between the tank and the sensor increased, the value of the received signal increased, but the noise also increased. The results of experiment, it is judged that accuracy can be improved by changing the contact surface of the sensor.

본 연구는 송 수신 초음파 센서를 이용하여 CNG 탱크에서의 정밀한 연료량을 측정하기 위한 기초 연구로써 탱크내부 압력 및 초음파 센서의 접촉면 변경에 따른 수신감도를 분석하였다. 실험은 탱크와 센서의 접촉면을 점, 선, 면의 3가지 타입으로 변경하고 탱크 내부의 압력을 0 bar 부터 5 bar까지 1 bar 간격으로 충전하면서 측정을 진행하였다. 실험결과 탱크내부의 압력이 증가함에 따라 초음파 센서의 수신신호 값이 감소하는 경향을 확인할 수 있었다. 또한 탱크와 센서의 접촉면적이 증가할수록 수신 신호 값은 증가하지만, 노이즈 또한 증가하는 것을 확인 할 수 있었다. 이와 같은 실험 결과 초음파의 투과 특성을 이용하여 탱크내부의 기체 연료량을 측정할 수 있을 것으로 판단되며, 센서의 접촉면 변경을 통해 정밀성을 향상시킬 수 있을 것으로 판단된다.

Keywords

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