Strain Gauge Calibration for High Speed Weight-in-Motion Station

Author:

Socha Agnieszka1ORCID,Izydorczyk Jacek2ORCID

Affiliation:

1. APM PRO sp. z o.o., 43-300 Bielsko-Biała, Poland

2. Faculty of Automation, Electronics and Computer Science, Silesian University of Technology, 44-100 Gliwice, Poland

Abstract

The development of systems for weighing vehicles in motion aims to introduce systems allowing automatic enforcement of regulations. HSWIM (high speed weight-in-motion) systems enable measurement of a mass of vehicles passing through a measurement station without disturbing the traffic flow. This article focuses on the calibration of a weighing station for moving vehicles, where strain gauge sensors are used to measure pressures. A solution was proposed to replace the calibration coefficients with calibration functions. The analysis was performed for two methods of determining wheel loads: based on the maximum of the signal from strain gauge sensors and on a method using the field under the signal and the vehicle’s speed. Calibration functions were determined jointly for all test vehicles and separately for each of them. The use of a calibration function for a specific vehicle type made it possible to determine wheel pressure and gross weight with a level of accuracy that allowed the weigh-in-motion station to be classified as a direct enforcement system. The achieved improvement in the accuracy of weighing in motion did not require any interference with the measurement station. The proposed change in the method of calibration and, ultimately, determination of wheel loads required only a change in the algorithm for determining wheel loads.

Publisher

MDPI AG

Reference26 articles.

1. van Loo, H., and Žnidarič, A. (2018). Guide for Users of Weigh-in-Motion an Introduction to Weigh-in-Motion, ISWIM, International Society for Weigh-in-Motion.

2. (2024, May 22). NIK, Overloaded Vehicular Traffic in Urbanised Areas, Szczecin Delegation, Warsaw, Available online: https://www.nik.gov.pl/plik/id,23352,vp,26070.pdf.

3. Accuracy Criteria for Evaluation of Weigh-in-Motion Systems;Burnos;Metrol. Meas. Syst.,2018

4. Gajda, J., Sroka, R., Burnos, P., and Daniol, M. (2023). Weigh-in-Motion Site for Type Approval of Vehicle Mass Enforcement Systems in Poland. Sensors, 23.

5. Warscotte, L., Boreux, J., Antofie, A., and Corbaye, D. (2023). Direct Enforcement in Belgium with High Speed Weigh-in-Motion (HS-WIM). Electronics, 12.

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