Patent ID: 9092982
Filing Date: 2015-07-28
Classification: G01P,G08G

Abstract:
1. An apparatus for measuring speed of movement of an object deforming lines of Earth's magnetic field when moving over a traffic roadway, said apparatus comprising a first magnetometer and second magnetometer, said first magnetometer being disposed on a first side of said traffic roadway and designed to target for a first measurement a measurement line perpendicular with respect to said roadway, said second magnetometer being disposed on said second side of a traffic roadway, opposite to said first side, and designed to target for a second measurement said measurement line perpendicular with respect to said roadway, said first and second magnetometers being configured for measuring deformation of Earth's magnetic field by said object travelling over said roadway, and a processing unit configured for extracting, from said first magnetometer, a first measurement value corresponding to a quotient of the minimum distance of said object with respect to said first magnetometer divided by a speed of movement of said object, and for extracting from said second magnetometer a second measurement value corresponding to the quotient of the minimum distance of the object with respect to said second magnetometer divided by said speed of movement of the object, and for calculating said speed of said object from said first and second measurement values and a geometrical disposition of said magnetometers with respect to one another and with respect to said traffic roadway.