公开(公告)号：US07671600B2

公开(公告)日：2010-03-02

申请号：US11907556

申请日：2007-10-15

申请人： Toshiyuki Suzuki ,  Tomoo Kawase ,  Eiichi Kurokawa ,  Yohei Kawaki

发明人： Toshiyuki Suzuki ,  Tomoo Kawase ,  Eiichi Kurokawa ,  Yohei Kawaki

IPC分类号： G01N27/62

CPC分类号： G01N27/407

摘要： A gas concentration detection apparatus includes a series-connected combination of a sensor element and a resistor, with an AC voltage being applied to one of the outer terminals of that combination and with the other outer terminal being held at a fixed potential. A DC voltage signal at a level determined by an oxygen concentration that is detected by the sensor element, and an AC voltage signal at an amplitude determined by sensor element impedance and hence by the sensor element activation status, are extracted from the series-connected combination by respectively separate circuits which apply separately determined amplification factors.

摘要翻译： 气体浓度检测装置包括传感器元件和电阻器的串联组合，其中AC电压被施加到该组合的外部端子之一，而另一个外部端子被保持在固定电位。 由传感器元件检测到的由氧浓度确定的水平的直流电压信号和由传感器元件阻抗确定的振幅以及因此由传感器元件启动状态确定的交流电压信号从串联连接的组合 分别分别应用单独确定的放大因子的电路。

公开(公告)号：US08257565B2

公开(公告)日：2012-09-04

申请号：US12035206

申请日：2008-02-21

申请人： Tomoo Kawase ,  Eiichi Kurokawa ,  Toshiyuki Suzuki ,  Yohei Kawaki

发明人： Tomoo Kawase ,  Eiichi Kurokawa ,  Toshiyuki Suzuki ,  Yohei Kawaki

IPC分类号： G01N27/26 ,  G01N7/00

CPC分类号： G01N27/4065

摘要： A sensor control apparatus includes an applied voltage control circuit connected to the positive terminal of a sensor element. The applied voltage control circuit includes a reference power supply and a noninverting amplifier circuit connected to the reference power supply. An AC power supply circuit, a buffer and a current measurement resistance are connected in series to the negative terminal of the sensor element with the current measurement resistance disposed between the AC power supply circuit and the sensor element. One terminal of the current measurement resistance, which is on the side opposite to the sensor element, is held at a reference voltage (center voltage of an AC voltage generated from the AC power supply circuit). Voltage at an intermediate point between the current measurement resistance and the sensor element is inputted via a low-pass filter to the noninverting amplifier circuit of the applied voltage control circuit.

摘要翻译： 传感器控制装置包括连接到传感器元件的正极端子的施加的电压控制电路。 所施加的电压控制电路包括参考电源和连接到参考电源的同相放大器电路。 交流电源电路，缓冲器和电流测量电阻与传感器元件的负极端子串联连接，电流测量电阻设置在交流电源电路和传感器元件之间。 在与传感器元件相反的一侧的电流测量电阻的一个端子被保持在参考电压（由AC电源电路产生的AC电压的中心电压）。 通过低通滤波器将电流测量电阻与传感器元件之间的中间点处的电压输入到所施加的电压控制电路的同相放大器电路。

公开(公告)号：US20080196480A1

公开(公告)日：2008-08-21

申请号：US12035206

申请日：2008-02-21

申请人： Tomoo KAWASE ,  Eiichi Kurokawa ,  Toshiyuki Suzuki ,  Yohei Kawaki

发明人： Tomoo KAWASE ,  Eiichi Kurokawa ,  Toshiyuki Suzuki ,  Yohei Kawaki

IPC分类号： G01N7/00

CPC分类号： G01N27/4065

摘要： A sensor control apparatus includes an applied voltage control circuit connected to the positive terminal of a sensor element. The applied voltage control circuit includes a reference power supply and a noninverting amplifier circuit connected to the reference power supply. An AC power supply circuit, a buffer and a current measurement resistance are connected in series to the negative terminal of the sensor element with the current measurement resistance disposed between the AC power supply circuit and the sensor element. One terminal of the current measurement resistance, which is on the side opposite to the sensor element, is held at a reference voltage (center voltage of an AC voltage generated from the AC power supply circuit). Voltage at an intermediate point between the current measurement resistance and the sensor element is inputted via a low-pass filter to the noninverting amplifier circuit of the applied voltage control circuit.

摘要翻译： 传感器控制装置包括连接到传感器元件的正极端子的施加的电压控制电路。 所施加的电压控制电路包括参考电源和连接到参考电源的同相放大器电路。 交流电源电路，缓冲器和电流测量电阻与传感器元件的负极端子串联连接，电流测量电阻设置在交流电源电路和传感器元件之间。 在与传感器元件相反的一侧的电流测量电阻的一个端子被保持在参考电压（由AC电源电路产生的AC电压的中心电压）。 通过低通滤波器将电流测量电阻与传感器元件之间的中间点处的电压输入到所施加的电压控制电路的同相放大器电路。

公开(公告)号：US08052863B2

公开(公告)日：2011-11-08

申请号：US12034078

申请日：2008-02-20

申请人： Toshiyuki Suzuki ,  Tomoo Kawase ,  Eiichi Kurokawa ,  Yohei Kawaki

发明人： Toshiyuki Suzuki ,  Tomoo Kawase ,  Eiichi Kurokawa ,  Yohei Kawaki

IPC分类号： G01N27/417

CPC分类号： G01N27/4175

摘要： The gas sensor control apparatus develops a first voltage based on a first reference voltage at a negative terminal of a gas sensor device through a resistor and a second voltage based on a second reference voltage at a positive terminal of the gas sensor device. A controller samples through the resistor a sensor current, as created upon the development of the first and second voltage for measuring the concentration of gas. When the impedance of the gas sensor device is measured, the controller alternates the first voltage across the first reference voltage. The value (i.e., a zero-point) of the voltage applied to the gas sensor device when the sensor current is zero (i.e., 0 mA) depends upon the first and second reference voltages. The zero-point is corrected by regulating the second reference voltage to match an applying voltage characteristic to the gas sensor device correctly.

摘要翻译： 气体传感器控制装置通过电阻器在气体传感器装置的负极端子处基于第一参考电压产生第一电压，并且在气体传感器装置的正端处基于第二参考电压产生第二电压。 控制器通过电阻器对传感器电流进行采样，这是根据开发用于测量气体浓度的第一和第二电压产生的。 当测量气体传感器装置的阻抗时，控制器交替跨越第一参考电压的第一电压。 当传感器电流为零（即0mA）时施加到气体传感器装置的电压的值（即，零点）取决于第一和第二参考电压。 通过调节第二参考电压以正确地对气体传感器装置施加施加电压特性来校正零点。

公开(公告)号：US20080197022A1

公开(公告)日：2008-08-21

申请号：US12034078

申请日：2008-02-20

申请人： Toshiyuki SUZUKI ,  Tomoo KAWASE ,  Eiichi KUROKAWA ,  Yohei KAWAKI

发明人： Toshiyuki SUZUKI ,  Tomoo KAWASE ,  Eiichi KUROKAWA ,  Yohei KAWAKI

IPC分类号： G01N27/407

CPC分类号： G01N27/4175

摘要： The gas sensor control apparatus develops a first voltage based on a first reference voltage at a negative terminal of a gas sensor device through a resistor and a second voltage based on a second reference voltage at a positive terminal of the gas sensor device. A controller samples through the resistor a sensor current, as created upon the development of the first and second voltage for measuring the concentration of gas. When the impedance of the gas sensor device is measured, the controller alternates the first voltage across the first reference voltage. The value (i.e., a zero-point) of the voltage applied to the gas sensor device when the sensor current is zero (i.e., 0 mA) depends upon the first and second reference voltages. The zero-point is corrected by regulating the second reference voltage to match an applying voltage characteristic to the gas sensor device correctly.

摘要翻译： 气体传感器控制装置通过电阻器在气体传感器装置的负极端子处基于第一参考电压产生第一电压，并且在气体传感器装置的正端处基于第二参考电压产生第二电压。 控制器通过电阻器对传感器电流进行采样，这是根据开发用于测量气体浓度的第一和第二电压产生的。 当测量气体传感器装置的阻抗时，控制器交替跨越第一参考电压的第一电压。 当传感器电流为零（即0mA）时施加到气体传感器装置的电压的值（即，零点）取决于第一和第二参考电压。 通过调节第二参考电压以正确地对气体传感器装置施加施加电压特性来校正零点。

公开(公告)号：US20080094079A1

公开(公告)日：2008-04-24

申请号：US11907556

申请日：2007-10-15

申请人： Toshiyuki Suzuki ,  Tomoo Kawase ,  Eiichi Kurokawa ,  Yohei Kawaki

发明人： Toshiyuki Suzuki ,  Tomoo Kawase ,  Eiichi Kurokawa ,  Yohei Kawaki

IPC分类号： G01N27/02

CPC分类号： G01N27/407

摘要： A gas concentration detection apparatus includes a series-connected combination of a sensor element and a resistor, with an AC voltage being applied to one of the outer terminals of that combination and with the other outer terminal being held at a fixed potential. A DC voltage signal at a level determined by an oxygen concentration that is detected by the sensor element, and an AC voltage signal at an amplitude determined by sensor element impedance and hence by the sensor element activation status, are extracted from the series-connected combination by respectively separate circuits which apply separately determined amplification factors.

摘要翻译： 气体浓度检测装置包括传感器元件和电阻器的串联组合，其中AC电压被施加到该组合的外部端子之一，而另一个外部端子被保持在固定电位。 由传感器元件检测到的由氧浓度确定的水平的直流电压信号和由传感器元件阻抗确定的振幅以及因此由传感器元件启动状态确定的交流电压信号从串联连接的组合 分别分别应用单独确定的放大因子的电路。