A Low-Cost, Flexible Pressure Capacitor Sensor Using Polyurethane for Wireless Vehicle Detection

Detection of vehicles on the road can contribute to the establishment of an intelligent transportation management system to allow smooth transportation and the reduction of road accidents. Thus far, an efficient and low-cost polymer flexible pressure sensor for vehicle detection is lacking. This pap...

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Bibliographic Details
Published in:Polymers 2019-07, Vol.11 (8), p.1247
Main Authors: Khong Duc, Chien, Hoang, Van-Phuc, Tien Nguyen, Duy, Thanh Dao, Toan
Format: Article
Language:English
Subjects:
Aluminum
Communication
Contact pressure
Electrodes
Etching
External pressure
Field tests
Flexible components
Internet of Things
Low cost
Magnetic fields
Polymers
Polyurethane resins
Portable computers
Pressure sensors
Research methodology
Sensors
Tires
Traffic accidents
Transportation management
Vehicle detectors
Vehicles
Weight reduction
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Summary:Detection of vehicles on the road can contribute to the establishment of an intelligent transportation management system to allow smooth transportation and the reduction of road accidents. Thus far, an efficient and low-cost polymer flexible pressure sensor for vehicle detection is lacking. This paper presents a flexible sensor for vehicle sensing and demonstrates a wireless system for monitoring vehicles on the road. A vehicle sensor was fabricated by sandwiching a polyurethane material between aluminum top/bottom electrodes. The sensing mechanism was based on changes in capacitance due to variation in the distance between the two electrodes at an applied external pressure. A clear response against a pressure load of 0.65 Mpa was observed, which is the same pressure as that of the car tire area in contact with the road. Significantly, the sensor was easy to embed on the road line due to its mechanical flexibility and large size. A field test was carried out by embedding the sensor on the road and crossing the sensor with a car. Moreover, the signal displayed on the tablet indicated that the sensing system can be used for wireless detection of the axle, speed, or weight of the vehicle on the road. The findings suggest that the flexible pressure sensor is a promising tool for use as a low-cost vehicle detector in future intelligent transportation management.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym11081247