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    • 4. 发明申请
    • Heating resistance flow rate measuring apparatus
    • 耐热流量测量装置
    • US20060070436A1
    • 2006-04-06
    • US11283778
    • 2005-11-22
    • Masahiro MatsumotoMasamichi YamadaHiroshi NakanoIzumi WatanabeKeiji HanzawaKeiichi Nakada
    • Masahiro MatsumotoMasamichi YamadaHiroshi NakanoIzumi WatanabeKeiji HanzawaKeiichi Nakada
    • G01F1/68
    • G01F1/6845F02D41/187G01F1/692G01F1/696G01F1/699
    • A heating resistance flow rate measuring apparatus which can use a power source of an ECU in an automobile without requiring an expensive protective circuit and regulator. Heating of temperature detecting resistors themselves causes temperature changes on the windward and leeward sides, and these temperature changes depend on the amounts of heat generated by the temperature detecting resistors. The amounts of heat generated by the temperature detecting resistors depend on a voltage value of the ECU power source applied to the temperature detecting resistors, and an error is caused in a sensor output depending on a variation in the voltage of the ECU power source. Based on the finding that suppressing the amount of heat generated by the temperature detecting resistors is effective in avoiding the sensor output error caused depending on a variation in the output voltage of the ECU power source, means for suppressing the amount of heat generated by the temperature detecting resistors is disposed.
    • 一种能够在汽车中使用ECU的电源而不需要昂贵的保护电路和调节器的加热电阻流量测量装置。 温度检测电阻本身的加热引起迎风侧风和背风侧的温度变化,这些温度变化取决于温度检测电阻产生的热量。 由温度检测电阻器产生的热量取决于施加到温度检测电阻器的ECU电源的电压值,并且根据ECU电源的电压变化在传感器输出中引起误差。 基于这样的发现,抑制由温度检测电阻产生的热量对于避免根据ECU电源的输出电压的变化而导致的传感器输出误差是有效的,用于抑制由温度产生的热量的装置 设置检测电阻器。
    • 6. 发明申请
    • Thermal flowmeter of fluid
    • 流体热流量计
    • US20070125169A1
    • 2007-06-07
    • US10580112
    • 2003-11-20
    • Hiroshi NakanoMasamichi YamadaMasahiro MatsumotoIzumi WatanabeKeiji HanzawaKeiichi Nakada
    • Hiroshi NakanoMasamichi YamadaMasahiro MatsumotoIzumi WatanabeKeiji HanzawaKeiichi Nakada
    • G01F1/68
    • G01F1/6965G01F1/6845
    • A thermal air flowmeter having excellent temperature characteristics and improved measurement accuracy. The thermal air flowmeter comprises a temperature sensor disposed in a casing of the air flowmeter, a computing unit for correcting a flow rate detection voltage from a measuring element by using the temperature sensor, and heating temperature control means disposed in a temperature control circuit for performing temperature control of a heating resistor to vary a temperature rise of the heating resistor relative to an air temperature depending on the air temperature. Flow rate detection errors of the thermal air flowmeter caused by an overall temperature change and a temperature change on an intake passage wall surface can be corrected simultaneously and a thermal air flowmeter having superior measurement accuracy can be realized.
    • 具有优异的温度特性和改进的测量精度的热空气流量计。 热空气流量计包括设置在空气流量计的壳体中的温度传感器,用于通过使用温度传感器校正来自测量元件的流量检测电压的计算单元,以及设置在温度控制电路中的加热温度控制装置,用于执行 加热电阻器的温度控制以根据空气温度改变加热电阻器相对于空气温度的温度升高。 可以同时校正由总体温度变化和进气通道壁面上的温度变化引起的热空气流量计的流量检测误差,并且可以实现具有优异的测量精度的热空气流量计。
    • 7. 发明授权
    • Heating resistance flow rate measuring apparatus
    • 耐热流量测量装置
    • US07225669B2
    • 2007-06-05
    • US11283778
    • 2005-11-22
    • Masahiro MatsumotoMasamichi YamadaHiroshi NakanoIzumi WatanabeKeiji HanzawaKeiichi Nakada
    • Masahiro MatsumotoMasamichi YamadaHiroshi NakanoIzumi WatanabeKeiji HanzawaKeiichi Nakada
    • G01F1/68
    • G01F1/6845F02D41/187G01F1/692G01F1/696G01F1/699
    • A heating resistance flow rate measuring apparatus which can use a power source of an ECU in an automobile without requiring an expensive protective circuit and regulator. Heating of temperature detecting resistors themselves causes temperature changes on the windward and leeward sides, and these temperature changes depend on the amounts of heat generated by the temperature detecting resistors. The amounts of heat generated by the temperature detecting resistors depend on a voltage value of the ECU power source applied to the temperature detecting resistors, and an error is caused in a sensor output depending on a variation in the voltage of the ECU power source. Based on the finding that suppressing the amount of heat generated by the temperature detecting resistors is effective in avoiding the sensor output error caused depending on a variation in the output voltage of the ECU power source, means for suppressing the amount of heat generated by the temperature detecting resistors is disposed.
    • 一种能够在汽车中使用ECU的电源而不需要昂贵的保护电路和调节器的加热电阻流量测量装置。 温度检测电阻本身的加热引起迎风侧风和背风侧的温度变化,这些温度变化取决于温度检测电阻产生的热量。 由温度检测电阻器产生的热量取决于施加到温度检测电阻器的ECU电源的电压值,并且根据ECU电源的电压变化在传感器输出中引起误差。 基于这样的发现,抑制由温度检测电阻产生的热量对于避免根据ECU电源的输出电压的变化而导致的传感器输出误差是有效的,用于抑制由温度产生的热量的装置 设置检测电阻器。