A New Analog Filter for Piezoelectric Sensors Signal Processing Designed for High Speed Weigh in Motion System

Abstract

In the present paper, a new analog filter is proposed to check with high accuracy the axle load and gross vehicle weight of commercial vehicles moving at normal speed without disruption of traffic flow and ensure their respect to the transport regulation. The proposed technique is based on the zero crossing detector, designed as the basis component of the new analog filter which significantly decreases the range of measured errors according to the international standard. The promising results prove the effectiveness and the reliability of the filter under study. The intended accuracy is achieved since the maximum weighting error is less than 1% for the vehicle axles whereas the gross vehicle weight is less than 0.3% for a speed range of 40-100 km/h.