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Proceedings Paper

Pavement deflection vehicle weighing method with embedded piezoelectric sensor
Author(s): Lianhe Guo; Xuemin Chen; Jingyan Yu; Yumei Tang; Richard Liu; Richard Rogers; Josef Leidy; Geman Claros
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Paper Abstract

In weigh-in-motion (WIM) system, the gross weight or the axle weight of the passing vehicle can be measured dynamically by the sensors installed in or on the pavement. One of the WIM sensors is piezoelectric sensor. Although piezoelectric sensor has limited measurement accuracy, it is widely deployed for its low cost and easy installation. To use the piezoelectric sensor, several factors have to be considered for the WIM site itself to ensure the vehicle passing over the sensor with a relative stable state. In addition, the piezoelectric sensor is seldom used for low speed measurement because of the piezoelectric material's performance. Traditional measurement method just uses the interactions between the sensor and the vehicle's tires that make the measurement inaccurate because the sensor cannot cover the whole tire patch along the driving direction. In this paper, the pavement deflection by the vehicle under measurement is introduced. New weighing method is developed for embedded piezoelectric sensors. Field tests are performed and the measurement errors are calculated based on the static weights measured from a static scale. Comparing to the traditional method, the proposed method is proved to have a higher accuracy and require less from installation site and vehicles under measurement. Furthermore, the method shows a better performance at low vehicle speed.

Paper Details

Date Published: 16 May 2005
PDF: 8 pages
Proc. SPIE 5758, Smart Structures and Materials 2005: Smart Sensor Technology and Measurement Systems, (16 May 2005); doi: 10.1117/12.606850
Show Author Affiliations
Lianhe Guo, Univ. of Houston (United States)
Xuemin Chen, Univ. of Houston (United States)
Jingyan Yu, Univ. of Houston (United States)
Yumei Tang, Univ. of Houston (United States)
Richard Liu, Univ. of Houston (United States)
Richard Rogers, Texas Dept. of Transportation (United States)
Josef Leidy, Texas Dept. of Transportation (United States)
Geman Claros, Texas Dept. of Transportation (United States)

Published in SPIE Proceedings Vol. 5758:
Smart Structures and Materials 2005: Smart Sensor Technology and Measurement Systems
Eric Udd; Daniele Inaudi, Editor(s)

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