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Analyses on Airbag Sensor Signals by Different Packaging

자동차용 에어백 센서의 패키징 방법에 따른 신호 전달 해석

  • Kim, Yeong K. (Dept. Convergence Engineering and Managements, Inha University) ;
  • Kang, Hyun Jin (Dept. of Mechanical Engineering, Inha University) ;
  • Kim, Joon Ki (Korea Institute of Industrial Technology)
  • 김영국 (인하대학교 공과대학 융합기술경영학부) ;
  • 강현진 (인하대학교 공과대학 기계공학과) ;
  • 김준기 (한국생산기술연구원)
  • Received : 2015.12.11
  • Accepted : 2015.12.29
  • Published : 2015.12.30

Abstract

In this study, a new airbag sensor packaging technique of directly attachment by adhesive to the automobile frame is introduced. To assess the feasibility for the packaging, a test instrument was manufactured to examine the impact sensibility by drop tests. The conventional sensor module attached mechanically by bolts with plastic housing and the new sensor packaging were installed to aluminum channel, and the results were compared with each other. Numerical analysis was also performed to investigate the signal characteristics created by the sensors. The preliminary results showed that the pattern of the MEMS sensor signal was strongly dependent on the structural behavior of the frame where the sensors were installed, which indicated the complexity of the packaging design for proper airbag deployments.

이 연구에서는 자동차용 에어백 작동에 쓰이는 가속 센서에 대해, 그 실장 방법에 따른 신호 전달 차이를 해석하였다. 실장 방법은 기존에 쓰이는 하우징을 사용한 모듈 형태와, 센서를 직접 자동차의 구조물에 접합재를 사용하여 부착하는 두 가지 방법을 고려하였다. 신호 전달을 분석하기 위하여, 충격 실험 장비가 구축되었고, ㄷ자형 알루미늄 채널을 이용하여 그 표면에 기존의 모듈 채결 방법과 센서를 직접 부착하는 방법을 사용하여 시편을 제작하여, 충돌 실험 후 측정된 파형을 비교하여 그 차이를 분석하였다. 또한 유한요소법을 이용하여 충격 실험을 모사하였고, 계산 결과를 실험 데이터와 비교하였다. 그 결과, 기존의 모듈형태의 부착 방법보다, 이 연구에서 제시된 접착제에 의해 직접 부착된 센서가 측정한 신호가 상대적으로 잡음없이 깨끗하고 강한 것을 알 수 있었으며, 또한 에어백 센서와 같은 MEMS 센서는 부착 방법에 따라 주변의 간섭 효과에 의해 그 성능이 크게 변하는 것을 알 수 있었다.

Keywords

References

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Cited by

  1. Module packaging effects on MEMS airbag sensor performance for automobiles vol.79, 2017, https://doi.org/10.1016/j.microrel.2017.07.051
  2. 센서 패키지용 고분자 접착제의 열화 거동 분석 vol.24, pp.1, 2015, https://doi.org/10.6117/kmeps.2017.24.1.067