Development of a Vehicle Passage Sensor Based on a PVDF Nanogenerator
ACS APPLIED ELECTRONIC MATERIALS(2021)
Abstract
Vehicle passage sensors provide important information for the traffic monitoring system. Despite missing a large amount of passing vehicle data, inductive loop sensors are one of the most commonly used detectors. Here, we introduce a sensor based on piezoelectric poly(vinylidene fluoride) (PVDF) composite fibers through which vehicle passage can be precisely identified. Loaded with 3 wt % of a TiO2-ZnO hybrid filler, the PVDF composite fibers benefit from the high beta-phase crystallinity of 92%, demonstrating a 13-fold increase in the generated voltage compared to the pristine PVDF fiber. On the basis of a corresponding piezoelectric nanogenerator (PNG) coupled with a circuit and a microcontroller, we have developed a sensor for vehicle passage monitoring. The designed sensor that has been installed on a speed bump successfully detects the passing vehicle tires, presenting a significant step toward traffic monitoring.
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Key words
PVDF composite fibers, PVDF crystal, piezoelectric nanogenerator, vehicle passage sensor, traffic monitoring
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