Method and apparatus for detecting visibility effect phenomenon by vehicle, and computer program therefor

摘要

The method involves emitting a light beam i.e. infrared beam, for lighting rear of a motor vehicle, where the light beam is reflected by an obstacle e.g. follower vehicle. A detection signal is generated based on a combination of the reflected light beam in case of the obstacle and a reference beam, where the combination is constituted of a summation of the beams, phase difference of the beams and amplitude difference of the beams. Modulation of the generated detection signal is compared with a reference information e.g. amplitude modulation threshold. Independent claims are also included for the following: (1) a visibility disruptive phenomenon detecting device comprising a control unit (2) a computer program product comprising instructions for performing a method to detect a visibility disruptive phenomenon generated by a motor vehicle.