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1. 发明授权

US07659731B2 Liquid properties sensor circuit 失效
标题翻译：液体特性传感器电路
公开(公告)号：US07659731B2
公开(公告)日：2010-02-09
申请号：US12031880
申请日：2008-02-15
申请人： Yingjie Lin , Su-Chee Simon Wang , Norberto Hernandez Resendiz
发明人： Yingjie Lin , Su-Chee Simon Wang , Norberto Hernandez Resendiz
IPC分类号： G01R27/08 , G01N27/42
CPC分类号： G01N33/2852
摘要： A sensor circuit is coupled to a sensing element for determining a property, such as a dielectric constant, of a fuel. The circuit includes an excitation voltage signal generator, a synchronization trigger and a processing circuit configured to generate an output signal indicative of the fuel property. The excitation signal is applied to the sensing element to produce an induced current signal. The synchronization trigger generates a trigger signal when the excitation signal crosses zero volts, at which time the real (resistive) component of the induced current signal is zero. The induced signal is therefore wholly representative of the imaginary component attributable to a capacitance of the fuel, which in turn is dependent on the dielectric constant (and thus ethanol concentration) of the fuel blend. The processing circuit is configured to sample the induced signal in response to the trigger signal and produce the output signal.
摘要翻译：传感器电路耦合到感测元件，用于确定燃料的性质，例如介电常数。电路包括激励电压信号发生器，同步触发器和被配置为产生指示燃料特性的输出信号的处理电路。激励信号被施加到感测元件以产生感应电流信号。当激励信号穿过零伏特时，同步触发器产生触发信号，此时感应电流信号的实数（电阻）分量为零。因此，感应信号完全代表归因于燃料电容的虚分量，其反过来取决于燃料混合物的介电常数（因此取决于乙醇浓度）。处理电路被配置为响应于触发信号对感应信号进行采样并产生输出信号。

2. 发明申请

US20080197863A1 LIQUID PROPERTIES SENSOR CIRCUIT 失效
标题翻译：液体传感器电路
公开(公告)号：US20080197863A1
公开(公告)日：2008-08-21
申请号：US12031880
申请日：2008-02-15
申请人： Yingjie Lin , Su-Chee Simon Wang , Norberto Hernandez Resendiz
发明人： Yingjie Lin , Su-Chee Simon Wang , Norberto Hernandez Resendiz
IPC分类号： G01R27/00
CPC分类号： G01N33/2852
摘要： A sensor circuit is coupled to a sensing element for determining a property, such as a dielectric constant, of a fuel suitable where the dielectric constant is used in determining a concentration of ethanol in the gasoline/ethanol blended fuel. The circuit includes an excitation voltage signal generator, a synchronization trigger and a processing circuit configured to generate an output signal indicative of the fuel property (dielectric constant). The excitation voltage signal is applied to the sensing element to produce an induced current signal therethrough. The synchronization trigger is configured to generate a trigger signal when the excitation voltage signal crosses zero volts, at which time the real (resistive) component of the induced current signal is zero. The induced signal is therefore wholly representative of the imaginary component attributable to a capacitance of the sensing element in sensing relation with the fuel, which in turn is dependent on the dielectric constant (and thus ethanol concentration) of the fuel blend itself. The processing circuit is configured to sample the induced signal in response to the trigger signal and produce the output signal. The synchronization scheme provides for a simplified circuit arrangement since there is o need to decompose a signal combining real and imaginary components.
摘要翻译：传感器电路耦合到感测元件，用于确定适用于在确定汽油/乙醇混合燃料中的乙醇浓度时使用介电常数的燃料的性质，例如介电常数。该电路包括激励电压信号发生器，同步触发和被配置为产生表示燃料特性（介电常数）的输出信号的处理电路。激励电压信号被施加到感测元件以产生通过其的感应电流信号。同步触发被配置为当激励电压信号跨越零伏特时产生触发信号，此时感应电流信号的实数（电阻）分量为零。因此，感应信号完全代表归因于传感元件在与燃料的关系中的电容的虚部，其反过来取决于燃料混合物本身的介电常数（因此取决于乙醇浓度）。处理电路被配置为响应于触发信号对感应信号进行采样并产生输出信号。同步方案提供简化的电路布置，因为需要分解组合实部和虚部的信号。

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