RESONANCE-INDUCED SENSITIVITY ENHANCEMENT METHOD FOR CONDUCTIVITY SENSORS
    10.
    发明申请
    RESONANCE-INDUCED SENSITIVITY ENHANCEMENT METHOD FOR CONDUCTIVITY SENSORS 失效
    用于电导率传感器的谐振感应灵敏度增强方法

    公开(公告)号:US20070247173A1

    公开(公告)日:2007-10-25

    申请号:US11697060

    申请日:2007-04-05

    IPC分类号: G01R27/08

    摘要: Methods and systems for improving the sensitivity of a variety of conductivity sensing devices, in particular capacitively-coupled contactless conductivity detectors. A parallel inductor is added to the conductivity sensor. The sensor with the parallel inductor is operated at a resonant frequency of the equivalent circuit model. At the resonant frequency, parasitic capacitances that are either in series or in parallel with the conductance (and possibly a series resistance) is substantially removed from the equivalent circuit, leaving a purely resistive impedance. An appreciably higher sensor sensitivity results. Experimental verification shows that sensitivity improvements of the order of 10,000-fold are possible. Examples of detecting particulates with high precision by application of the apparatus and methods of operation are described.

    摘要翻译: 用于提高各种电导率传感装置的灵敏度的方法和系统,特别是电容耦合的非接触电导检测器。 并联电感器被添加到电导率传感器。 具有并联电感器的传感器以等效电路模型的谐振频率工作。 在谐振频率下,与电导串联或并联的寄生电容(和可能的串联电阻)基本上从等效电路中去除,留下纯电阻阻抗。 传感器敏感度会更高。 实验验证表明灵敏度提高可达10,000倍。 描述了通过应用该装置和操作方法检测高精度的微粒的实例。