It is important for semi-autonomous or full-autonomous driving that it is possible to monitor whether the driver holds the steering wheel with a hand or whether the driver leaves the steering wheel unattended. A hand occupancy system/HOD (occupancy detection) is now often installed and is based on capacitance measurements made of capacitance that varies as a result of at least one hand being placed on the steering wheel. Disclosed is a hand recognition device (1) for a steering wheel arrangement (2) of a vehicle, comprising: a sensor layer (7) having at least one electrically conductive sensor section (9); a signal generator device (15) which is designed to generate an excitation signal (22) and which is coupled to the sensor layer (7) in order to transmit the excitation signal (22) to the sensor layer (7); a signal detection device (16) for detecting a response signal (23) from the sensor layer (7) to the excitation signal (22), the signal generator device (16) being coupled to the sensor layer (7) in order to transmit the response signal (22) to the signal detection device (16); an evaluation device (17), which is designed to detect, on the basis of the detected response signal (23), a change in the sensor capacitance (19) due to the placement of the at least one hand on the steering wheel device (2) and/or the removal of the at least one hand from the steering wheel device, and a signal generator device, which is designed to generate a square wave signal as an excitation signal (22).
对于半自主或全自主驾驶重要的是,能监测驾驶员是否用手握住方向盘或者驾驶员是否无人看管地离开方向盘。现在经常安装手占用系统/HOD(占用检测)并且其基于对因至少一只手放在方向盘上而改变的电容进行的电容测量。公开了一种用于车辆的方向盘装置(2)的手识别设备(1),其包括:传感器层(7),所述传感器层(7)具有至少一个导电的传感器区段(9);信号发生器装置(15),所述信号发生器装置被构造用于产生激励信号(22),所述信号发生器装置与传感器层(7)耦合以便将激励信号(22)传递到传感器层(7);信号检测装置(16),用于检测来自传感器层(7)的对激励信号(22)的响应信号(23),所述信号发生器装置(16)与传感器层(7)耦合以便将响应信号(22)传递到信号检测装置16;分析处理装置(17),所述分析处理装置(17)被构造用于基于所检测的响应信号(23)检测因至少一只手放置在方向盘装置(2)上和/或从方向盘装置移除引起的传感器电容(19)的变化,所述信号发生器装置被构造用于产生方波信号作为激励信号(22)。
Hand recognition device for steering wheel arrangement and steering wheel assembly having hand recognition device
用于方向盘装置的手识别设备和具有手识别设备的方向盘组件
2024-10-25
Patent
Electronic Resource
Chinese
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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