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http://dx.doi.org/10.5762/KAIS.2018.19.10.151

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

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)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.19, no.10, 2018 , pp. 151-157 More about this Journal
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;
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