METHOD AND SENSOR ARRAY FOR TOUCH-FREE WIDTH MONITORING IN VEHICLE TREATMENT INSTALLATIONS

The invention relates to a vehicle treatment installation (2), in which at least one treatment device (4), in particular a wash portal, and a vehicle to be treated are moved relative to one another, comprising a collision detection device (6) for width monitoring of a maximum treatment area (B) of the vehicle treatment installation (2), which for monitoring a lateral boundary of the maximum treatment area (B) has at least one first optical sensor (8) that is operated at a predetermined scan frequency, and for each scan cycle outputs either a covered event or a non-covered event, and a controlunit (10) for evaluating the output values of the first optical sensor (8). The detection area of the first optical sensor (8) is aligned along a lateral boundary of the maximum treatment area (B) ofthe vehicle treatment installation (2) and the treatment device (4) in the direction of travel thereof leading ahead by a specified distance (S1). The control unit (10) is set in such a way that the control unit detects an imm