한국공간구조학회지 제18권 제3호 (p.67-74)

|논문|
극한 환경에서 온도 변화에 따른 실외 현장에서의 무선 MEMS 센서 계측 유효성 평가

Evaluation of Wireless MEMS Sensor Measurements at an Outdoor Field With Temperature Variation in Extreme Environment
키워드 :
Extreme environment,Measurement,Wireless,MEMS,SHM,Vibration,Temperature variation

목차

Abstract
1. 서론
2. 무선 MEMS 시스템의 통신
  2.1 무선 MEMS 가속도계
  2.2 무선 데이터 수신기
3. 진동 계측 방법
  3.1 실험 개요
  3.2 실험 방법
4. 실험 결과
  4.1 20m
   4.1.1 Time history
   4.1.2 Power spectrum
   4.1.3 Damping ratio
  4.2 40m
   4.2.1 Time history
   4.2.2 Power spectrum
   4.2.3 Damping ratio
  4.3 60m
   4.3.1 Time history
   4.3.2 Power spectrum
   4.3.3 Damping ratio
  4.4 80m
5. 결론
감사의 글
References

초록

Recently, measuring instruments for SHM of structures has been developed. In general, the wireless transmission of sensor signals, compared to its wired counterpart, is preferable due to the absence of triboelectric noise and elimination of the requirement of a cumbersome cable. However, in extreme environments, the sensor may be less sensitive to temperature changes and to the distance between the sensor and data logger. This may compromise on the performance of the sensor and instrumentation. Therefore, in this paper, free vibration experiments were conducted using wireless MEMS sensors at an actual site. Measurement was assessed in time and frequency domain by changing the temperature variation at(- 8℃, - 12℃ and - 16℃) and the communication distance (20m, 40m, 60m, 80m).