Reconstruction of axle load signal, measurement basis of static load of vehicle axles through the high speed weigh in motion system

The dynamic loads are the variable component of axle load signal of vehicles, while its continuous component corresponds to the static load of the axle. These dynamic loads are the main factor that affects the accuracy of the High Speed Weigh in Motion System (HS-WIM), which are designed for measuring axle load of moving vehicles at normal speed. This paper introduces the algorithm of the Lagrange Polynomial Interpolation to reconstruct the axle load signal on a limited bandwidth and few simulation tests are completed as well. The reconstruction of the signal, performed from discrete samples, allows the estimation of the static axle load. The drawn conclusion of this study confirms, through the simulation tests, the efficiency of the studied algorithm, which is proven through the encouraging values of the evaluation indicators related to the signal reconstruction quality.