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Sensors 2008, 8(12), 7671-7689; doi:10.3390/s8127671

A Novel Sensor System for Measuring Wheel Loads of Vehicles on Highways

1
Department of Automation of Testing and Control, Harbin Institute of Technology, Harbin, P.R. China
2
MEMS Center, Harbin Institute of Technology, Harbin, P.R. China
*
Author to whom correspondence should be addressed.
Received: 11 August 2008 / Revised: 17 November 2008 / Accepted: 1 December 2008 / Published: 2 December 2008
(This article belongs to the Section Chemical Sensors)

Abstract

With the development of the highway transportation and business trade, vehicle Weigh-In-Motion (WIM) technology has become a key technology for measuring traffic loads. In this paper a novel WIM system based on monitoring of pavement strain responses in rigid pavement was investigated. In this WIM system multiple low cost, light weight, small volume and high accuracy embedded concrete strain sensors were used as WIM sensors to measure rigid pavement strain responses. In order to verify the feasibility of the method, a system prototype based on multiple sensors was designed and deployed on a relatively busy freeway. Field calibration and tests were performed with known two-axle truck wheel loads and the measurement errors were calculated based on the static weights measured with a static weighbridge. This enables the weights of other vehicles to be calculated from the calibration constant. Calibration and test results for individual sensors or three-sensor fusions are both provided. Repeatability, sources of error, and weight accuracy are discussed. Successful results showed that the proposed method was feasible and proven to have a high accuracy. Furthermore, a sample mean approach using multiple fused individual sensors could provide better performance compared to individual sensors. View Full-Text
Keywords: Weigh-In-Motion (WIM); Embedded concrete strain sensor; Vehicle wheel loads; Multiple sensors system Weigh-In-Motion (WIM); Embedded concrete strain sensor; Vehicle wheel loads; Multiple sensors system
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Zhang, W.; Suo, C.; Wang, Q. A Novel Sensor System for Measuring Wheel Loads of Vehicles on Highways. Sensors 2008, 8, 7671-7689.

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