RAIN DETECTION DEVICE, GARDEN APPLIANCE HAVING THE RAIN DETECTION DEVICE, AND METHOD FOR SENSING RAIN DROPS ON A SURFACE BY MEANS OF A RAIN DETECTION DEVICE

摘要

The invention relates to a rain detection device for sensing rain drops on a surface (14), comprising: - at least one sensor unit (16), which has at least one capacitive sensor element (22), the sensor element (22) being designed and/or disposed such that a capacitance characteristic of the sensor element (22) changes on the basis of an object contacting the surface (14); and - at least one evaluation unit (26), which is designed to detect rain drops on the surface (14) on the basis of a differential signal of the sensor element (22). According to the invention, the evaluation unit (26) is designed to detect a rain drop on the surface (14) on the basis of a symmetry characteristic of the differential signal, more particularly with respect to a zero point.