Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Development of a Weight in Motion sensor using Piezo Film

피에조 필름을 이용한 축중감지기 개발

  • 양희선 (공주대학교 기계공학과 대학원) ;
  • 박연규 (한국표준과학연구원 역학표준부 힘그룹) ;
  • 강대임 (한국표준과학연구원 역학표준부 힘그룹) ;
  • 김엄기 (공주대학교 기계공학과)
  • Published : 2000.11.02
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Abstract

This paper describes a weight in motion(WIM) sensor to measure the weight of a vehicle in motion. The main sensing element of the WIM sensor is the PVDF(Polyvinylidene fluoride) film that shows rapid response to an external excitation. Due to the property of rapid response, it is possible to measure the weight of a vehicle in motion with high speed. In the development of the WIM sensor, the dominant target value was the uniformity of the sensor. To increase the uniformity, We employed shrinkable tube made of rubber to enhance the uniformity, and performed the rolling of the brass tube repeatedly. The uniformity of the sensor was examined experimentally. It was comparable to that of a WIM sensor of the MSI which was the benchmark of this development. This paper also describes the mechanical modeling of the sensor and the suitable charge amplifier for the sensor.

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