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A new smart traffic monitoring method using embedded cement-based piezoelectric sensors
Zhang J.; Lu Y.; Lu Z.; Liu C.; Sun G.; Li Z.
2015-02-01
Source PublicationSmart Materials and Structures
ISSN1361665X 09641726
Volume24Issue:2
AbstractCement-based piezoelectric composites are employed as the sensing elements of a new smart traffic monitoring system. The piezoelectricity of the cement-based piezoelectric sensors enables powerful and accurate real-time detection of the pressure induced by the traffic flow. To describe the mechanical-electrical conversion mechanism between traffic flow and the electrical output of the embedded piezoelectric sensors, a mathematical model is established based on Duhamel's integral, the constitutive law and the charge-leakage characteristics of the piezoelectric composite. Laboratory tests show that the voltage magnitude of the sensor is linearly proportional to the applied pressure, which ensures the reliability of the cement-based piezoelectric sensors for traffic monitoring. A series of on-site road tests by a 10 tonne truck and a 6.8 tonne van show that vehicle weight-in-motion can be predicted based on the mechanical-electrical model by taking into account the vehicle speed and the charge-leakage property of the piezoelectric sensor. In the speed range from 20 km h to 70 km h, the error of the repeated weigh-in-motion measurements of the 6.8 tonne van is less than 1 tonne. The results indicate that the embedded cement-based piezoelectric sensors and associated measurement setup have good capability of smart traffic monitoring, such as traffic flow detection, vehicle speed detection and weigh-in-motion measurement.
Keywordcement-based piezoelectric composite mechanicalelectrical conversion smart traffic monitoring system vehicle speed detection weigh-in-motion measurement
DOI10.1088/0964-1726/24/2/025023
URLView the original
Language英語
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Cited Times [WOS]:33   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
AffiliationHong Kong University of Science and Technology
Recommended Citation
GB/T 7714
Zhang J.,Lu Y.,Lu Z.,et al. A new smart traffic monitoring method using embedded cement-based piezoelectric sensors[J]. Smart Materials and Structures,2015,24(2).
APA Zhang J.,Lu Y.,Lu Z.,Liu C.,Sun G.,&Li Z..(2015).A new smart traffic monitoring method using embedded cement-based piezoelectric sensors.Smart Materials and Structures,24(2).
MLA Zhang J.,et al."A new smart traffic monitoring method using embedded cement-based piezoelectric sensors".Smart Materials and Structures 24.2(2015).
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