Dielectric detecting device
    1.
    发明授权
    Dielectric detecting device 失效
    电介质检测装置

    公开(公告)号:US5446391A

    公开(公告)日:1995-08-29

    申请号:US050811

    申请日:1993-04-21

    摘要: A dielectric detecting device includes an earth electrode and a sensor electrode opposed to the earth electrode which constitute a capacitor whose capacitance is varied with an existence of a dielectric object therebetween. A detecting device is provided for detecting a change in the capacitance of the capacitor and a capacitance of a circuit in the dielectric detecting device. The detecting device includes an input signal processing device disposed between an output side of the detecting device and an input side of the sensor electrode, a switching device disposed between the input signal processing device and the sensor electrode, and a judging device for judging whether the dielectric object exists or not on the basis of an output of the detecting device and judging whether an error has occurred at one or more of the earth electrode, the sensor electrode, the detecting device and input signal processing device on the basis of capacitances when the switching device is in its on and off conditions.

    摘要翻译: 介质检测装置包括接地电极和与接地电极相对的传感器电极,它们构成电容器,其电容随着介质物体之间的存在而变化。 提供一种检测装置,用于检测电容器的电容变化和电介质检测装置中的电路的电容。 检测装置包括设置在检测装置的输出侧和传感器电极的输入侧之间的输入信号处理装置,设置在输入信号处理装置和传感器电极之间的开关装置,以及判断装置, 基于检测装置的输出存在或不存在介电物体,并且基于当所述接地电极,传感器电极,检测装置和输入信号处理装置中的一个或多个,基于电容 开关器件处于开关状态。

    Dielectric detecting system
    3.
    发明授权
    Dielectric detecting system 失效
    电介质检测系统

    公开(公告)号:US5467022A

    公开(公告)日:1995-11-14

    申请号:US5083

    申请日:1993-01-15

    CPC分类号: G01V3/088 B60N2/002

    摘要: A dielectric detecting system comprises: an earth electrode; a sensor electrode opposed to the earth electrode for constituting a first condenser therebetween whose electric capacitance varies in dependence on an existence of the dielectric; a medium electrode positioned between the earth electrode and the sensor electrode for constituting a second condenser between the medium electrode and the earth electrode and a third condenser between the medium electrode and the sensor electrode in such a manner that one of an electric capacitance of the second condenser and an electric capacitance of the third condenser serves for detecting an other dielectric; and an operational amplifier for equalizing electric potential of the medium electrode to that of the sensor electrode.

    摘要翻译: 介电检测系统包括:接地电极; 与接地电极相对的传感器电极,用于构成其电容根据电介质的存在而变化的第一电容器; 位于所述接地电极和所述传感器电极之间的介质电极,用于在所述介质电极和所述接地电极之间构成第二电容器,以及在所述介质电极和所述传感器电极之间的第三电容器,使得所述第二电容器 电容器和第三电容器的电容用于检测另一电介质; 以及用于使介质电极的电位与传感器电极的电位相等的运算放大器。