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INSTRUMENTED VEHICLE AND ITS USE FOR CALIBRATION OF WIM SYSTEMS

M Huhtala, Pekka Halonen

Open publisher page 2 citations

Abstract

As a vehicle drives on a road the instantenous wheel load is not steady, eg 10 tons but is varies because of the unevenness of the road. This varying axle load is often called as dynamic axle load. All weigh-in-motion (WIM) systems must be calibrated at site. The instrumented vehicle measures instantenous wheel loads and thus seem to be an exellent tool for calibration of WIM-systems. The instrumented vehicle of VTT was used in calibration measurements at WAVE tests near LLtlea in Northern Sweden and near Metz in France. The use of instrumented vehicle was more complicated than assumed. It is not only question of the accuracy of the measurement system nor the accuracy of matching the measurements at the vehicle and at WIM-systems but also a problem: what is really expectedjrom the calibration. The (good) results and problems are presented in this paper.

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What this paper is about

As a vehicle drives on a road the instantenous wheel load is not steady, eg 10 tons but is varies because of the unevenness of the road. This varying axle load is often called as dynamic axle load. All weigh-in-motion (WIM) systems must be calibrated at site. The instrumented vehicle measures instantenous wheel loads and thus seem to be an exellent tool for calibration of WIM-systems. The instrumented vehicle of VTT was used in calibration measurements at WAVE tests near LLtlea in Northern Sweden and near Metz in France. The use of instrumented vehicle was more complicated than assumed. It is not only question of the accuracy of the measurement system nor the accuracy of matching the measurements at the vehicle and at WIM-systems but also a problem: what is really expectedjrom the calibration. The (good) results and problems are presented in this paper.

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Available abstract

As a vehicle drives on a road the instantenous wheel load is not steady, eg 10 tons but is varies because of the unevenness of the road. This varying axle load is often called as dynamic axle load. All weigh-in-motion (WIM) systems must be calibrated at site. The instrumented vehicle measures instantenous wheel loads and thus seem to be an exellent tool for calibration of WIM-systems. The instrumented vehicle of VTT was used in calibration measurements at WAVE tests near LLtlea in Northern Sweden and near Metz in France. The use of instrumented vehicle was more complicated than assumed. It is not only question of the accuracy of the measurement system nor the accuracy of matching the measurements at the vehicle and at WIM-systems but also a problem: what is really expectedjrom the calibration. The (good) results and problems are presented in this paper.

Key concepts: Calibration, Weigh in motion, Axle, Engineering, Automotive engineering, Axle load, Computer science, Structural engineering

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