Environment parameter e.g. rain, detecting device for convertible motor vehicle, has comparison unit providing control signal using operation setting unit, where signal adopts active state based on number of crossings exceeding threshold

摘要

The device has a capacitive sensor connected to a logic controller (3) for delivering an output signal (Ct1) representing temporal evolution of capacitance. A comparison unit (7) receives the signal, detects crossing of pre-recorded limit (CL1) by the signal and counts number of crossings during a pre-recorded time unit (tau1). The unit compares the number of crossings with threshold (N01) and provides a control signal using an operation setting unit (20) of sunroof (2) and window pane (200), where the signal adopts an active state (A) based on the number of crossings exceeding the threshold.