Patent ID: 7710310

Claim:
A detection system ( 1 ), comprising: an optical sensor ( 3 ); a radar device ( 2 ); and a signal processor ( 4 ) communicatively connected with the optical sensor and the radar device, the signal processor comprising: a first detector ( 41 , 410 - 413 ) for detecting a first object on the basis of a first signal coming from the optical sensor and determining at least one first property of the first object; a second detector ( 42 , 420 - 421 ) for detecting a second object on the basis of a second signal coming from the radar device and determining at least one second property of that second object, a signaling unit ( 43 ) for producing a signal if the at least one first property and the at least one second property satisfy a predetermined condition; a first distance determinator configured to determine from the first signal a first distance between the first object and the optical sensor; a second distance determinator configured to determine from the second signal a second distance between the second object and the radar device; and said signaling unit produces a signal if the difference between the first and second distances satisfies a predetermined condition.