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A Study on Serviceability of PVDF Piezoelectric Sensor for Efficient Vehicle Detection

효율적 차량 검지를 위한 PVDF 압전센서의 사용성 연구

  • Jung, YooSeok (Department of Future Technology and Convergence Research, Korea Institute of Civil engineering and building Technology) ;
  • Oh, JuSam (Department of Future Technology and Convergence Research, Korea Institute of Civil engineering and building Technology)
  • 정유석 (한국건설기술연구원 미래융합연구본부) ;
  • 오주삼 (한국건설기술연구원 미래융합연구본부)
  • Received : 2018.07.04
  • Accepted : 2018.10.05
  • Published : 2018.10.31

Abstract

Among the various sensors for measuring traffic, PVDF (polyvinylidene fluoride) piezoelectric sensors are used to classify vehicles because they can detect the axle of the vehicle. Piezoelectric sensors are embedded in road pavements and are always exposed to traffic loads and environmental loads. Therefore, the life expectancy is very short, less than 6 years. Traffic control is essential for reinstallation and data collection is interrupted during the failure period. The lifespan will increase if the sensor installation depth is increased. In this study, the sensor signal output was analyzed with a variable depth of sensor installation to verify the possibility of deeper installation. Furthermore, various parameters, such as the weight and speed, were analyzed. The wheel load is applied using APT. As a result, the MSI BL sensor output signal is higher than 100mV when installed at 3cm, which is reliable. If the location of the sensor is deeper in the pavement, the expected lifetime of the sensor is also increased. On the other hand, the MSI cable was found to be less than 100mV at the shallowest depth of 1cm, making it impossible for field applications.

Keywords

APT;Axle count;Installation depth;PVDF piezoelectric sensor;Vehicle classification

Acknowledgement

Grant : 스마트도로 시대를 위한 전자차량번호판 표준 및 핵심기술 개발 기획연구

Supported by : 한국건설기술연구원

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