The invention discloses a steering wheel disengaging detection device and method. The device comprises a torque sensor and an electric power steering system, wherein the torque sensor is disposed on asteering column for collecting the steering torque exerted on a vehicle steering wheel in real time; and the electric power steering system comprises an ECU used for obtaining and processing a steering torque signal collected by the torque sensor, and the ECU can judge whether the steering wheel is in a disengaging or holding state according to the steering torque and calibration parameters pre-stored in the ECU. The torque sensor (non-contact torque sensor unit) arranged on the steering column is used for detecting a steering torque signal borne by a steering wheel and transmitting the steering torque signal to an ECU in an electric power steering system, therefore, the steering torque signal can be directly processed through the electric power steering system to judge whether the steering wheel is in a disengaging state or a holding state. The acquisition period of the torque signal acquired by the method is far shorter than the signal period of the electric power steering system transmitted outwards to the CAN bus; compared with an FCS (front camera system)/LKA which processes and judges according to the torque signal on the CAN bus, the judgment precision of judging whether the steering wheel is in a disengaging state or a holding state is improved.
一种方向盘脱手检测装置及方法,其包括:扭矩传感器,设于转向管柱上,实时采集施加于车辆方向盘上的转向扭矩;电动助力转向系统,包括用于获取并处理扭矩传感器采集的转向扭矩信号的ECU,ECU能够根据转向扭矩与预存于ECU内的标定参数判断方向盘处于脱手或握紧状态。本发明利用设于转向管柱上的扭矩传感器(非接触式‑扭矩传感器单元)检测到方向盘受到的转向扭矩信号并传输给电动助力转向系统中的ECU,以能直接通过电动助力转向系统对转向扭矩信号进行处理以判断方向盘处于脱手或握紧状态,通过该方式获取的扭矩信号的采集周期远远低于电动助力转向系统自身向外传输到CAN总线的信号周期,相较于FCS(前摄像头系统)/LKA根据CAN总线上扭矩信号处理判断,提高了判断方向盘处于脱手或握紧状态的判断精度。
Steering wheel disengaging detection device and method
一种方向盘脱手检测装置及检测方法
2020-04-24
Patent
Electronic Resource
Chinese
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