In the field of the semi-autonomous or fully autonomous driving, it is important to be able to monitor whether a driver is holding a steering wheel with their hand or whether the driver is leaving the steering wheel unattended. Hands-on detection/HOD systems are now often installed and involve measuring a capacitance which changes when at least one hand is placed on the steering wheel. The invention relates to a hand detection apparatus 1 for a steering wheel device 2 of a vehicle comprising: a sensor layer 7, the sensor layer 7 having at least one conductive sensor portion 9; a signal generator device 15, the signal generator device 15 being designed to generate an excitation signal 22 and being coupled to the sensor layer 7 in order to transfer the excitation signal 22 to the sensor layer 7; a signal recognition device 16 for recognizing a response signal 23, in response to the excitation signal 22, from the sensor layer 7, the signal generator device 16 being coupled to the sensor layer 7 in order to transfer the response signal 23 to the signal recognition device 16; an evaluation device 17, the evaluation device 17 being designed to determine a change in a sensor capacitance 19 caused by at least one hand being placed on and/or removed from the steering wheel device 2 on the basis of the recognized response signal 23 and the signal generator device 15 being designed to generate a rectangular signal as the excitation signal 22.
HAND DETECTION APPARATUS FOR A STEERING WHEEL DEVICE AND STEERING WHEEL ARRANGEMENT HAVING THE HAND DETECTION APPARATUS
12.06.2025
Patent
Elektronische Ressource
Englisch
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