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1. 发明授权

US08508234B2 Method and device for detecting failures in inductive conductivity measurements of a fluid medium 有权
标题翻译：用于检测流体介质的感应电导率测量中的故障的方法和装置
公开(公告)号：US08508234B2
公开(公告)日：2013-08-13
申请号：US13006045
申请日：2011-01-13
申请人： Changlin Wang , Fengjin Wang , Jun Xia , Xiaokai Wang , Jürgen Ammann
发明人： Changlin Wang , Fengjin Wang , Jun Xia , Xiaokai Wang , Jürgen Ammann
IPC分类号： G01R31/02 , G01N27/02
CPC分类号： G01N27/023
摘要： Exemplary embodiments of the present invention are directed to methods and devices for detecting open-circuit and short-circuit failure in an electromagnetic (inductive) measurement of the conductivity of liquids and on the sensor and cable wiring. An electromagnetic measurement of the conductivity of a liquid is performed by immersing a sensor into the liquid, wherein the sensor includes at least 2 toroidal cores, one of them carrying an excitation coil and the other carrying an induction coil. When an AC excitation voltage is applied to the excitation coil, an induced current or voltage can be measured in the induction coil which is proportional to the conductivity of the measured liquid.
摘要翻译：本发明的示例性实施例涉及用于检测液体的电导率和传感器和电缆布线的电磁（感应）测量中的开路和短路故障的方法和装置。通过将传感器浸入液体中来进行液体的导电性的电磁测量，其中传感器包括至少2个环形芯，其中一个承载励磁线圈，另一个承载感应线圈。当向激励线圈施加AC激励电压时，可以在感应线圈中测量感应电流或电压，该感应电流或电压与被测液体的电导率成比例。

2. 发明申请

US20110163756A1 METHOD AND DEVICE FOR DETECTING FAILURES IN INDUCTIVE CONDUCTIVITY MEASUREMENTS OF A FLUID MEDIUM 有权
标题翻译：用于检测流体介质感应电导率测量失败的方法和装置
公开(公告)号：US20110163756A1
公开(公告)日：2011-07-07
申请号：US13006045
申请日：2011-01-13
申请人： Changlin Wang , Fengjin Wang , Jun Xia , Xiaokai Wang , Jürgen Ammann
发明人： Changlin Wang , Fengjin Wang , Jun Xia , Xiaokai Wang , Jürgen Ammann
IPC分类号： G01R31/02
CPC分类号： G01N27/023
摘要： Exemplary embodiments of the present invention are directed to methods and devices for detecting open-circuit and short-circuit failure in an electromagnetic (inductive) measurement of the conductivity of liquids and on the sensor and cable wiring. An electromagnetic measurement of the conductivity of a liquid is performed by immersing a sensor into the liquid, wherein the sensor includes at least 2 toroidal cores, one of them carrying an excitation coil and the other carrying an induction coil. When an AC excitation voltage is applied to the excitation coil, an induced current or voltage can be measured in the induction coil which is proportional to the conductivity of the measured liquid.
摘要翻译：本发明的示例性实施例涉及用于检测液体的电导率和传感器和电缆布线的电磁（感应）测量中的开路和短路故障的方法和装置。通过将传感器浸入液体中来进行液体的导电性的电磁测量，其中传感器包括至少2个环形芯，其中一个承载励磁线圈，另一个承载感应线圈。当向激励线圈施加AC激励电压时，可以在感应线圈中测量感应电流或电压，该感应电流或电压与被测液体的电导率成比例。

3. 发明授权

US08456178B2 Method and device for inductive conductivity measurements of a fluid medium 有权
标题翻译：流体介质的感应电导率测量方法和装置
公开(公告)号：US08456178B2
公开(公告)日：2013-06-04
申请号：US13006154
申请日：2011-01-13
申请人： Changlin Wang , Fengjin Wang , Xiaokai Wang , Jürgen Ammann
发明人： Changlin Wang , Fengjin Wang , Xiaokai Wang , Jürgen Ammann
IPC分类号： G01R27/28 , G01R27/08
CPC分类号： G01N27/023
摘要： Exemplary embodiments of the present invention include methods and devices for the electromagnetic (inductive) measurement of the conductivity of liquids by immersing a sensor into the liquid, wherein the sensor includes at least 2 toroidal cores, one of said cores carrying an excitation coil and the other core carrying an induction coil. Exemplary methods include converting the induced current at the induction coil into an alternating square-wave voltage, followed by rectification. A sample-hold circuit may be employed to avoid the transition time of the alternating square-wave current conversion. The demodulated DC voltage is proportional to the conductivity of the measured liquid.
摘要翻译：本发明的示例性实施例包括通过将传感器浸入液体中来对液体的电导率进行电磁（感应）测量的方法和装置，其中所述传感器包括至少2个环形芯，所述芯中的一个承载励磁线圈，其他芯体承载感应线圈。示例性的方法包括将感应线圈处的感应电流转换成交替的方波电压，然后进行整流。可以采用采样保持电路来避免交替方波电流转换的转换时间。解调的直流电压与被测液体的电导率成比例。

4. 发明申请

US20110140717A1 METHOD AND DEVICE FOR INDUCTIVE CONDUCTIVITY MEASUREMENTS OF A FLUID MEDIUM 有权
标题翻译：用于液体介质的电导率测量的方法和装置
公开(公告)号：US20110140717A1
公开(公告)日：2011-06-16
申请号：US13006154
申请日：2011-01-13
申请人： Changlin Wang , Fengjin Wang , Xiaokai Wang , Jürgen Ammann
发明人： Changlin Wang , Fengjin Wang , Xiaokai Wang , Jürgen Ammann
IPC分类号： G01R27/28
CPC分类号： G01N27/023
摘要： Exemplary embodiments of the present invention include methods and devices for the electromagnetic (inductive) measurement of the conductivity of liquids by immersing a sensor into the liquid, wherein the sensor includes at least 2 toroidal cores, one of said cores carrying an excitation coil and the other core carrying an induction coil. Exemplary methods include converting the induced current at the induction coil into an alternating square-wave voltage, followed by rectification. A sample-hold circuit may be employed to avoid the transition time of the alternating square-wave current conversion. The demodulated DC voltage is proportional to the conductivity of the measured liquid.
摘要翻译：本发明的示例性实施例包括通过将传感器浸入液体中来对液体的电导率进行电磁（感应）测量的方法和装置，其中所述传感器包括至少2个环形芯，所述芯中的一个承载励磁线圈，其他芯体承载感应线圈。示例性的方法包括将感应线圈处的感应电流转换成交替的方波电压，然后进行整流。可以采用采样保持电路来避免交替方波电流转换的转换时间。解调的直流电压与被测液体的电导率成比例。

5. 发明授权

US08451007B2 Input circuit for inductive measurements of the conductivity of a fluid medium 有权
标题翻译：用于感应测量流体介质的电导率的输入电路
公开(公告)号：US08451007B2
公开(公告)日：2013-05-28
申请号：US13006089
申请日：2011-01-13
申请人： Fengjin Wang , Changlin Wang
发明人： Fengjin Wang , Changlin Wang
IPC分类号： G01N27/60
CPC分类号： G01N27/025
摘要： Exemplary embodiments of the invention include an input circuit for electromagnetic (inductive) measurements of the conductivity of liquids. The input circuit and the induction coil are directly coupled, and the arrangement includes a current-voltage converting circuit which accomplishes the transformation from current to voltage in the induction coil, and ensures the terminal voltage to be zero. Also there is an anti-saturation circuit which is composed of an integrating circuit and a voltage dividing circuit and serves to prevent saturation in the operational amplifier which is used for the current-voltage transformation. The circuit further includes features for the detection of an open-circuit failure of the sensor coil or cable.
摘要翻译：本发明的示例性实施例包括用于电磁（感应）测量液体的电导率的输入电路。输入电路和感应线圈直接耦合，该装置包括电流 - 电压转换电路，其实现感应线圈中的电流到电压的变换，并确保端电压为零。还有一个由积分电路和分压电路组成的抗饱和电路，用于防止用于电流 - 电压变换的运算放大器的饱和。该电路还包括用于检测传感器线圈或电缆的开路故障的特征。

6. 发明申请

US20110140716A1 INPUT CIRCUIT FOR INDUCTIVE MEASUREMENTS OF THE CONDUCTIVITY OF A FLUID MEDIUM 有权
标题翻译：用于感应流量传感器测量的输入电路
公开(公告)号：US20110140716A1
公开(公告)日：2011-06-16
申请号：US13006089
申请日：2011-01-13
申请人： Fengjin Wang , Changlin Wang
发明人： Fengjin Wang , Changlin Wang
IPC分类号： G01R27/28
CPC分类号： G01N27/025
摘要： Exemplary embodiments of the invention include an input circuit for electromagnetic (inductive) measurements of the conductivity of liquids. The input circuit and the induction coil are directly coupled, and the arrangement includes a current-voltage converting circuit which accomplishes the transformation from current to voltage in the induction coil, and ensures the terminal voltage to be zero. Also there is an anti-saturation circuit which is composed of an integrating circuit and a voltage dividing circuit and serves to prevent saturation in the operational amplifier which is used for the current-voltage transformation. The circuit further includes features for the detection of an open-circuit failure of the sensor coil or cable.
摘要翻译：本发明的示例性实施例包括用于电磁（感应）测量液体的电导率的输入电路。输入电路和感应线圈直接耦合，该装置包括电流 - 电压转换电路，其实现感应线圈中的电流到电压的变换，并确保端电压为零。还有一个由积分电路和分压电路组成的抗饱和电路，用于防止用于电流 - 电压变换的运算放大器的饱和。该电路还包括用于检测传感器线圈或电缆的开路故障的特征。

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