THESIS
2013
xiii, 93 pages : illustrations ; 30 cm
Abstract
A smart traffic monitoring system based on cement-based piezoelectric transducers which can
monitor the traffic flow, vehicle speed and vehicle weight has been developed in this study.
The main contributions of this study are: 1. an equation relating the vehicle velocity and the
output of the transducer is derived and solved; and 2. an equation considering the current
leakage in the output of the transducer is resolved. As a result, the accuracy and reliability of
the monitoring system have been greatly improved. Compared with the traditional method,
static or quasi-static state, the new traffic monitoring system can achieve the function of
Weigh-in-motion with high accuracy. The smart traffic monitoring system can automatically analyze the velocity and weight of the moving vehic...[
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A smart traffic monitoring system based on cement-based piezoelectric transducers which can
monitor the traffic flow, vehicle speed and vehicle weight has been developed in this study.
The main contributions of this study are: 1. an equation relating the vehicle velocity and the
output of the transducer is derived and solved; and 2. an equation considering the current
leakage in the output of the transducer is resolved. As a result, the accuracy and reliability of
the monitoring system have been greatly improved. Compared with the traditional method,
static or quasi-static state, the new traffic monitoring system can achieve the function of
Weigh-in-motion with high accuracy. The smart traffic monitoring system can automatically analyze the velocity and weight of the moving vehicles.
A trial system is set up in Nansha, Guangdong. The on-site tested results show that in the
velocity range from 20km/h to 70km/h, the errors of the calculated total vehicle weight of
both the 2-axle, 10t vehicle and the 2-axle, 6.8t vehicle are lower than 15%.
The work in this thesis opens a new direction for the application of cement-based
piezoelectric composites in the field of smart traffic monitoring. The materials and techniques,
developed in this work, have a great potential in real application of the on-site monitoring.
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