The invention discloses a steering wheel hand-leaving detection device and a steering wheel, the steering wheel hand-leaving detection device comprises wires, a capacitance value change detection circuit and a micro-control unit, the two wires are wound on a hub of the steering wheel to be detected in parallel; a TRIG pin of a 555 timer chip of the capacitance change detection circuit is connected to a lead, and an OUT pin of the 555 timer chip is connected to the micro-control unit; the capacitance value change detection circuit is used for detecting the capacitance value of the plate capacitor formed by the two wires and transmitting square wave signals to the micro-control unit, and the frequencies of the square wave signals are different when the detected capacitance values are different. The device adopts the 555 timer chip to directly convert the changed capacitance value of the wire into a square signal which is easier to process by the micro-control unit, the efficiency is high, the cost is low, and the circuit structure is simple.
本发明公开一种方向盘离手检测装置及方向盘,其中,方向盘离手检测装置包括:导线、容值变化检测电路和微控制单元,两条导线并行缠绕在待检测方向盘的轮毂上;容值变化检测电路的555定时器芯片的TRIG引脚连接至导线,555定时器芯片的OUT引脚连接至微控制单元;所述容值变化检测电路用于检测两条所述导线形成的平板电容的容值,并向所述微控制单元传输方波信号,其中,检测出的容值不同,所述方波信号的频率也不同。该装置采用555定时器芯片将导线变化的容值直接转换为微控制单元更容易处理的方波信号,效率高,成本低且电路结构简单。
Hand-leaving detection device for steering wheel and steering wheel
一种方向盘离手检测装置及方向盘
2023-03-07
Patent
Elektronische Ressource
Chinesisch
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