The embodiment of the invention discloses a steering wheel detection circuit, a control method of the steering wheel detection circuit and a steering wheel. The circuit comprises a first control unit, a second control unit, a first diode and a second diode, the steering wheel to be detected is coated with a single-layer resistance wire grid, and the first detection site and the second detection site are arranged on the single-layer resistance wire grid; the first control unit is used for realizing switching between a hand leaving detection mode and a heating mode of the steering wheel to be detected; the second control unit is used for acquiring a capacitance signal of the to-be-detected steering wheel and judging whether the steering wheel is in a hand-off state based on the capacitance signal. The first control unit and the second control unit are isolated by using the two diodes, so that the influence of the technical parasitic capacitance of the first control unit on the detection of the parasitic capacitance formed by the palm and the steering wheel is avoided; the technical problem that in the prior art, a steering wheel is wrapped by a single-layer metal grid, and hand-leaving detection cannot be conducted is solved.
本发明实施例公开了一种方向盘检测电路、方向盘检测电路的控制方法和方向盘,电路包括第一控制单元、第二控制单元、第一二极管以及第二二极管;待检方向盘上包覆有单层电阻丝网格,第一检测位点和第二检测位点设置于单层电阻丝网格上;第一控制单元用于实现待检方向盘的离手检测模式和加热模式之间的切换;第二控制单元用于获取待检方向盘的电容信号,并基于电容信号判断是否出现方向盘离手状态。本申请通过使用两个二极管将第一控制单元与第二控制单元相隔离,避免了第一控制单元的技术寄生电容对手掌和方向盘形成的寄生电容的检测造成影响,解决了现有技术中使用单层金属网格包覆方向盘无法进行离手检测的技术问题。
Steering wheel detection circuit, control method of steering wheel detection circuit and steering wheel
方向盘检测电路、方向盘检测电路的控制方法和方向盘
2025-06-06
Patent
Electronic Resource
Chinese
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