The present invention relates to a device or sensor that detects the presence of ice, water, snow and other substances on the surface of a roadway, in a local region or zone thereof. Said device comprises two or more laser sources with different wavelength...

The method involves detecting a variable in a motor vehicle (5) by using detection devices e.g. camera (15), microphone (17), detection unit (19), pulse measurement device (20), alarm system (22) and crash sensor. The variable is correlated with a characte...

The method involves detecting a variable in a motor vehicle (5) by using detection devices e.g. camera (15), microphone (17), detection unit (19), pulse measurement device (20), alarm system (22) and crash sensor. The variable is correlated with a characte...

A sound level signal describing a sound determines a frequency signal split by a limiting frequency into two sub-ranges each assigned to an appropriate frequency band. An intensity value is detected for two frequency bands from each sub-range so as to iden...