The invention discloses an electric vehicle pedestrian warning method and system. The method comprises the following steps: converting a phase current sine wave frequency signal into a PWM wave signalthrough a comparator, extracting the frequency, and calculating the current vehicle speed according to the frequency; carrying out differential operation on signals collected by the Hall sensor through an operational amplifier so as to calculate the driving force of the current driving vehicle, and then obtaining the current acceleration and deceleration state of the vehicle; and if the current vehicle speed is within a vehicle speed threshold range or the current acceleration and deceleration state meets a preset state, controlling a loudspeaker or a buzzer of the vehicle to work through a main controller so as to warn pedestrians. Dependence on other ECUs can be reduced, and the problems that in the prior art, logic processing is complex, the implementation cost is high, and low-speed prompt tone failures or the vehicle driving state cannot be truly reflected due to ECU failures or power failure are likely to occur are solved.

    本发明公开了一种电动汽车行人警示方法及系统,所述电动汽车行人警示方法包括:通过比较器将相电流正弦波频率信号转换成PWM波信号提取出频率,并根据频率计算出当前车速;通过运算放大器对霍尔传感器采集的信号进行差分运算,以计算出当前驱动车辆的驱动力,进而得出车辆的当前加减速状态;若当前车速在车速阈值范围内,或者当前加减速状态满足预设状态,则通过主控制器控制车辆的扬声器或蜂鸣器工作,以警示行人。本发明能够降低对其它ECU的依赖,解决现有技术逻辑处理复杂、实现成本高、容易出现因ECU失效或未上电导致低速提示音失效或不能真实反映车辆行驶状态的问题。


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    Titel :

    Electric vehicle pedestrian warning method and system


    Weitere Titelangaben:

    电动汽车行人警示方法及系统


    Beteiligte:
    YANG HONGJI (Autor:in) / SHEN ZUYING (Autor:in) / JIANG XIAOHUA (Autor:in) / SHAN FENGWU (Autor:in) / HU MINJIAO (Autor:in)

    Erscheinungsdatum :

    2020-07-24


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein



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