A collision warning apparatus

摘要

The invention relates to a collision warning apparatus for a vehicle comprising an object detecting means (11), a visibility detecting means (12), a computer unit (13) with a comparison and calculation system (16) and an application system (14), said object detecting means (11) being arranged to detect objects in the surroundings of said vehicle (2), said visibility detecting means (12) being arranged to detect visibility conditions in said surroundings of said vehicle (2), and said application system (14) being arranged to warn the driver of said vehicle (2) when there is a risk for an imminent collision with an object (15) in said surroundings of said vehicle (2). According to the invention, said comparison and calculation system (16) is arranged to compare data from said object detecting means (11) with data from said visibility detecting means (12) and said application system (14) is arranged to be activated by said computer unit (13) when said data from said object detecting means (11) indicates that it has detected an object (15) in the surroundings of said vehicle (2) and when said data from said visibility detecting means (12) indicates that it has detected low or no visibility in the surroundings of said vehicle (2).