CAPTEUR DE PASSAGE DE VEHICULES ROULANTS A DETECTEURS PIEZO-ELECTRIQUES JUXTAPOSES INDEPENDANTS

摘要

The invention relates to a piezoelectric detector including at least one piezoelectric sensing element inserted into an assembly suitable for transmitting pressure forces to each piezoelectric sensing element, said assembly including a rolling plate (16) having a surface (17) for measuring the pressure forces along a measuring direction perpendicular to said measurement surface, and a resiliently deformable device (22) suitable for subjecting each piezoelectric sensing element to compressive prestressing. The resiliently deformable device (22) has a height along the measurement direction that is less than the largest dimension thereof that is orthogonal to said measurement direction. The invention also relates to a sensor for sensing the passage of travelling vehicles, including a plurality of piezoelectric detectors according to the invention that are juxtaposed on a single base.