Speed control and track change detection device suitable for railways

A speed control and track change detection system for railways comprising:

• three high-frequency radar sensors situated at the vertices of an imaginary triangle, wherein
• two longitudinally arranged radar sensors of said three high-frequency radar sensors are arranged on the longitudinal axis, separated from one another by a known distance, each one of said two longitudinally arranged radar sensors concentrates radiated energy thereof on an area of approximately one square centimetre of the surface and measures the distance from a sensor to the ground, such that from each on of the two longitudinally arranged radar sensors a detailed profile of the ground is obtained as a train advances;
• a third sensor of said three high-frequency radar sensors is arranged on the axis perpendicular to the path at the height of one of said two longitudinally arranged radar sensors, such that each sensor obtains a detailed profile of the ground on the outside of a rail, so that a digital processing device for processing radar signals is able to detect the presence of the rail when the same crosses it, identifying if the train has changed track;
• the digital processing device for processing the radar signals that measures a time lag existing between the profiles of the ground obtained by the two longitudinally arranged radar sensors and calculates the speed of the train and identifies, through the profiles of the ground obtained by the transversely arranged radar sensors, the detection of when the rails are passed over and determines when the train changes track.