Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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A FPGA-based Development of Ultrasonic Level Meter for Measuring Oil Levels of Vehicle Transmissions

차량의 변속기 오일레벨 측정을 위한 FPGA 기반 초음파 레벨 측정기 개발

  • Kang, Moon-Ho (Department of Information and Communication Engineering, Sunmoon University) ;
  • Park, Yoon-Chang (Department of Information and Communication Engineering, Sunmoon University)
  • 강문호 (선문대학교 정보통신공학과) ;
  • 박윤창 (선문대학교 정보통신공학과)
  • Received : 2012.07.27
  • Accepted : 2012.11.08
  • Published : 2012.11.30
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Abstract

In this paper a ultrasonic level meter for accurately and simply measuring oil levels of vehicle transmission is developed and its effectiveness is shown by experiments. By using a FPGA, all digital signal processes for the oil level calculation is fulfilled, and the programming on a FPGA project IDE enables very short developing time. And besides, analog circuits including a transmit/receive switch, multi-stage active filters and an envelope detect circuit are designed to process low-level ultrasonic echo signal. Under experiments, the designed level meter has proven to have the accuracy of about within 1[mm] scale.

본 논문에서는 자동차 변속기 오일레벨을 정확하고 손쉽게 측정할 수 있는 초음파 오일레벨 측정기를 개발하고 실험을 통하여 유용성을 보였다. 초음파 프로브 구동 펄스 생성과 오일레벨 연산을 비롯한 모든 디지털 신호 처리가 하나의 FPGA에 의해서 이루어지도록 하여 측정기의 단순화와 고성능화를 이루었고, 모든 프로그램을 FPGA 프로젝트 IDE상에서 제작하여 측정기 개발 시간을 줄일 수 있었다. 또한, 저-레벨의 초음파 에코 신호를 처리하기 위한 송수신 스위치회로, 다단 능동 필터회로 및 포락선 검출회로 등을 설계하였고, 실험을 통하여 설계된 측정기가 약 1mm 이내의 측정 정확도를 가짐을 확인하였다.

Keywords

References

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