The invention discloses a suspension button sensor unit. The suspension button sensor unit comprises a power supply circuit, a capacitance sensor, a capacitance-to-digital conversion circuit, an MCU,an acousto-optic feedback control circuit and a communication circuit; the capacitance sensor is a central electrode and a peripheral electrode which are arranged in a convex shape, the capacitance-to-digital conversion circuit measures self capacitance and mutual capacitance of the central electrode and the peripheral electrode after a human finger approaches and calculates and judges whether thefinger enters an area range and stays for a period of time, and the control module outputs a control logic signal of the button. By means of the button formed by the sensor unit, it is detected thatthe human finger approaches an effective suspended trigger area range on the upper portion of a certain center electrode, and tri-state response that the human finger enters the effective suspended trigger area range on the upper portion of the certain center electrode is provided through the acousto-optic feedback control circuit. The suspension button sensor unit creatively provides a low-cost and mature CDC chip technology which is reasonable in structural design, effectively resists various interferences and makes full use of capacitance detection, and a commercialized technical solution which can be popularized is provided for sanitation sensitivity.

    一种悬停按钮传感器单元,包括:电源电路,电容传感器,电容数字转换电路和MCU,声光反馈控制电路、通讯电路;电容传感器为一个凸字形布置的中心电极和外围电极,电容数字转换电路测量人体手指接近后的中心电极和外围电极的自电容和互电容,计算判断手指是否进入区域范围及停留时间,以此控制模块输出该按钮的控制逻辑信号;借助这个传感器单元构成的按钮,检测人体手指接近某个中心电极上部有效悬停触发区域范围,通过声光反馈控制电路提供人体手指进入某个中心电极上部有效悬停触发区域范围的三态响应;本发明创造提供了结构设计合理,有效抵御各种干扰,充分利用电容检测的低成本和成熟的CDC芯片技术,为卫生敏感提供了可以普及推广的商业化技术解决方案。


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    Title :

    Suspension button sensor unit and method of providing suspension button triggering


    Additional title:

    一种悬停按钮传感器单元及提供悬停按钮触发的方法


    Contributors:
    SUN TENGCHEN (author) / ZHANG DAHUA (author) / ZHUANG WEI (author)

    Publication date :

    2020-08-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66B Aufzüge , ELEVATORS



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