Abstract: Detection device for a steering wheel of a vehicle, said device being configured to detect contact or proximity of a person with or to the steering wheel, comprising sensors, of which there are only three, of which: a first sensor (21) is intended to be arranged on a left-hand half of a first face of the steering wheel, a second sensor (22) is intended to be arranged on a right-hand half of said first face of the steering wheel, and a third sensor (23) is intended to be arranged on a second face opposed to said first face of the steering wheel, and said first face is a rear face of the steering wheel.

Abstract: A method for calibrating a measuring device for a vehicle steering wheel, the measuring device comprising a detection sensor, and an acquisition unit, the calibrating method comprising the steps of: placing the vehicle steering wheel with the on-board detection sensor in a reference environment, carrying out a reference measurement, recording the level of the reference signal and/or adjusting and recording at least one initial threshold to be used by the electronic control unit to initiate a driver assistance action, depending on the level of the measured reference signal and/or recording a difference between the level of the reference signal and the initial threshold.

Abstract: A capacitive detection device that may include at least one electrode of a capacitive sensor, an alternating voltage source, a device for measuring a complex value of impedance or admittance between the detection electrode and an electrical circuit reference point and a calibration resistor, and a switching device arranged so as to connect the voltage source to the electrode, in the measurement mode, and to connect the voltage source to the calibration resistor and disconnect the voltage source from the electrode, in the calibration mode. The measuring device is arranged so as to measure a first complex value of the calibration resistor, during operation in the calibration mode; to measure a second complex value between the electrode and the electrical circuit reference point during operation in measurement mode, and to correct the second measured complex value according to the first measured complex value.

Abstract: Detection device for a steering wheel of a vehicle, said device being configured to detect contact or proximity of a person with or to the steering wheel, comprising sensors, of which there are only three, of which: a first sensor (21) is intended to be arranged on a left-hand half of a first face of the steering wheel, a second sensor (22) is intended to be arranged on a right-hand half of said first face of the steering wheel, and a third sensor (23) is intended to be arranged on a second face opposed to said first face of the steering wheel, and said first face is a rear face of the steering wheel.

Abstract: A capacitive detection device comprising at least one electrode of a capacitive sensor of said component, an alternating voltage source, a device for measuring a complex value of impedance or admittance between the detection electrode and an electrical circuit reference point and a calibration resistor, and a switching device arranged so as to connect the voltage source to the electrode, in the measurement mode, and to connect the voltage source to the calibration resistor and disconnect the voltage source from the electrode in the calibration mode. The measuring device is arranged so as to measure a first complex value of the calibration resistor, during operation in the calibration mode; to measure a second complex value between the electrode and the electrical circuit reference point during operation in measurement mode, and to correct the second measured complex value according to the first measured complex value.

Abstract: A seat which is to be removably mounted in position on tracks in a motor vehicle has at least one safety element in the form of an active safety device or sensor. A communication channel is established between a control unit and the safety element. At least part of the communication channel is a wireless link. There is a first system which provides a signal to the control unit when the seat is present in the vehicle, and an independent system which is separate from the seat-part of the communication channel, for determining the presence of the seat of the vehicle, and providing an appropriate signal to the control unit. The control unit therefore has two signals indicating the presence of the seat.