DYNAMIC AXIS SCALE WITH HIGH ACCURACY FOR HIGH SPEED MEASUREMENT OF VEHICLE MASS

David Gichangi Axelson, Koji Tada, Tuan Le, Shinichi Hayashida, Toshio Uchimaru, Yutaka Yamamoto

Abstract

As the demand for measuring objects in motion is increasing the need for a system to measure vehicles has been developed to measure mass of vehicle in dynamic motion. Using the concept of measuring the inertial mass of a moving vehicle instead of gravitational mass has proven successful for a purely dynamic problem. <br />Since the measurement of a dynamic motion requires high speed sampling a scanning speed of the signal information is set at 1&#956;s/sample. This is to ensure the movement of the structure is captured to full extent. <br />Using dynamics, the inertial mass correlation between the Dynamic Axis Scale and the vehicle can be calculated from the dynamic state of the vehicle in motion. The achieved result is instantaneous and currently reliable from 0 km/h up to 80 km/h with an high accuracy with ± 5% of error tolerance of the measured mass provided the vehicle mass is restricted to EU regulation for public roads of 20 ton. Measuring the momentum of the vehicle and calculating the speed to the relation of mass, it can verify the dynamic calculation and thus confirm the inertial mass of the vehicle.

Keywords

dynamic mass, momentum, vehicle mass measuring

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IMEKO-TC3-2010-015.pdf

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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