Procedure for adapting the sensitivity of a rain sensor to ambient conditions and sensor system with a rain sensor

摘要

With the procedure for adapting the sensitivity of a sensor system with a precipitation sensor for detecting precipitations, in particular for controlling a vehicle windscreen wiper drive, an increase in the response sensitivity given low ambient brightness, and thus, in a particular application, an improvement in the subjective viewing conditions when travelling in the rain at night, is achieved. In addition, a corresponding sensor system is described whose response sensitivity can be adjusted by an additional brightness sensor or by a switch-on signal of a light switch. IMAGE