Steering wheel with adaptive-capacitive touch recognition, an associated assembly and motor vehicle

An assembly, comprising:

• a steering wheel hub of a steering wheel, the steering wheel hub being configured as a detachable attachment to a steering shaft of a motor vehicle;
• a steering wheel rim fixed to the steering wheel hub;
• at least one electrode, which is integrated into the steering wheel rim, wherein the at least one electrode is configured for a capacitive detection of a touch on the steering wheel rim;
• an electrically conductive connection between the at least one electrode and an electronic evaluation unit comprised of electronic circuitry, disposed outside the steering wheel, to apply an electrical measuring potential for touch detection to the at least one electrode via the electrically conductive connection, and to detect, based on an associated change in measuring capacitance, the touch on the steering wheel rim, depending on at least one predetermined parameter, wherein the at least one predetermined parameter is at least one of the group consisting of a permittivity of a material of the steering wheel rim, a geometry of the electrode within the steering wheel rim, and a position of the electrode within the steering wheel rim, and wherein a sensitivity of the electronic evaluation unit is adjusted based on a switching distance which is a function of the at least one predetermined parameter;
• a non-volatile memory integrated with the steering wheel and in which the at least one predetermined parameter is stored;
• and
• a reading circuit, which is disposed outside the steering wheel, is connected in a data-transmitting manner to the electronic evaluation unit, and which is adapted to read out at least the at least one predetermined parameter from the non-volatile memory and to transmit the at least one predetermined parameter to the electronic evaluation unit.

A motor vehicle, comprising:

• an assembly, wherein the assembly further comprises:
• a steering wheel hub of a steering wheel, the steering wheel hub being configured as a detachable attachment to a steering shaft of the motor vehicle;
• a steering wheel rim fixed to the steering wheel hub;
• at least one electrode, which is integrated into the steering wheel rim, wherein the at least one electrode is configured for a capacitive detection of a touch on the steering wheel rim;
• an electrically conductive connection between the at least one electrode and an electronic evaluation unit comprised of electronic circuitry, disposed outside the steering wheel, to apply an electrical measuring potential for touch detection to the at least one electrode via the electrically conductive connection, and to detect, based on an associated change in measuring capacitance, the touch on the steering wheel rim, depending on at least one predetermined parameter, wherein the at least one predetermined parameter is at least one of the group consisting of a permittivity of a material of the steering wheel rim, a geometry of the electrode within the steering wheel rim, and a position of the electrode within the steering wheel rim, and wherein a sensitivity of the electronic evaluation unit is adjusted based on a switching distance which is a function of the at least one predetermined parameter;
• a non-volatile memory integrated with the steering wheel and in which the at least one predetermined parameter is stored;
• and
• a reading circuit, which is disposed outside the steering wheel, is connected in a data-transmitting manner to the electronic evaluation unit, and which is adapted to read out at least the at least one predetermined parameter from the non-volatile memory and to transmit the at least one predetermined parameter to the electronic evaluation unit.