DEVICE FOR DETECTING A USER'S INTENTION TO LOCK OR UNLOCK A MOTOR VEHICLE DOOR AND ASSOCIATED DOOR HANDLE

摘要

The present invention concerns a device (D') for detecting a user's intention to lock or unlock a motor vehicle door (10'), said device (D') being included in a sealed housing (B'), incorporated into a handle (10') that is not sealed and the lower part of which comprises discharge holes (t1, t2), part of the housing (B') being submerged in water (e), said device (D') comprising: • a capacitive sensor (100) for detecting approach and/or contact, comprising at least one detection electrode (E2'), having a variable-value detection capacitor (Ce), the capacitance of which is representative of the approach of the hand (M) of a user, • a charge/discharge capacitor (Cs), the invention proposing the addition of a protection electrode Ep situated in the part of the housing that is submerged in water, coupled electrically to the detection electrode and connected to a terminal of the charge/discharge capacitor Cs such that the protection electrode Ep is simultaneously at the same potential as the terminal of the charge/discharge capacitor during the different stages of charging/discharging the detection capacitor and the charge/discharge capacitor that are necessary in order to estimate the value of the detection capacitor.