Undesired Splash Over on Equipments Using Inductive Sensors for Monitoring Automotive Vehicles’ Controlled Speed

Silvio Monteiro, Maurício Réche, Altair S. de Assis


This article aims to evaluate instruments that oversight traffic flow electronically, using inductive surface sensors, based on the change of local magnetic field. More specifically, we study the possibility of false speed detections, due to the manifestation of the phenomenon called splash over — which means a space splash of the magnetic field lines out of the measuring zone. We show, through the literature, and practical simulations, the damage that can be caused by splash on the correct speed measurement and identification of the car under suspicions. It is also presented solutions to inhibiting unwanted velocity measurements due to this effect.


Oversight Traffic, Speed Meters, Legal Metrology, Splash Over, Magnetic Field.

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