Patent ID: 8884812
Filing Date: 2014-11-11
Classification: G01S,G08G

Abstract:
1. A method for detecting a wheel of a vehicle that is traveling on a roadway in a travel direction, the wheels of which are at least partially exposed laterally, the method comprising: emitting, from a Doppler lidar or radar device, an electromagnetic measurement beam lobe having a known temporal progression of frequency, from the side of the roadway onto an area above the roadway and at a slant with respect to the travel direction; receiving the measurement beam lobe reflected by a passing vehicle and recording the temporal progression, relative to the known progression, of all of its frequencies appearing at the same time as a reception frequency mixture in the device; and during the passage of the vehicle, detecting, in an evaluation unit, a frequency spread appearing in the recorded temporal progression of the reception frequency mixture and exceeding a predetermined threshold value, as a wheel.