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    • 4. 发明授权
    • Terminal flow sensor
    • 端子流量传感器
    • US5024083A
    • 1991-06-18
    • US451058
    • 1989-12-15
    • Masanori InadaHichiro Ohtani
    • Masanori InadaHichiro Ohtani
    • G01F1/68G01F1/684G01F1/692
    • G01F1/684
    • A thermal flow sensor has a heat-sensitive resistor which is disposed at a predetermined angle relative to the line of stream of a fluid, and which has its heat-sensitive portion disposed on the surface portion of a substrate which is positioned downstream in the direction in which the fluid flows. Since the heat-sensitive resistor is already disposed at a predetermined angle relative to the line of stream of the fluid, this permits only slight influence on, hence, variation in detection characteristic to be caused by deviation in the disposition angle. Since the heat-sensitive portion is disposed on a surface portion positioned downstream in the direction of fluid flow, this restrains dust contained in air from directly depositing on the heat-sensitive portion, hence, from causing variation in detection characteristic.
    • 热流传感器具有热敏电阻器,该热敏电阻器相对于流体流线以预定角度设置,并且其热敏部分设置在基板的表面部分上,该基板位于沿着方向 其中流体流动。 由于热敏电阻器相对于流体流线已经以预定角度设置,所以这仅允许由于配置角度的偏差而导致的检测特性的变化的轻微影响。 由于热敏部分设置在位于流体流动方向下游的表面部分上,这就限制了空气中包含的灰尘直接沉积在热敏部分上,从而导致检测特性的变化。
    • 7. 发明授权
    • Thermal flow sensor for compensating gradient of flow rate
characteristics
    • 用于补偿流量特性梯度的热流传感器
    • US5237868A
    • 1993-08-24
    • US814460
    • 1991-12-30
    • Masanori Inada
    • Masanori Inada
    • G01F1/68G01F1/698
    • G01F1/698
    • A thermal flow sensor comprising a bridge circuit positioned in a fluid and including a platinum wire as a thermal resistor, an air temperature sensor and a pair of resistors, and a temperature control circuit for controlling a current flowing through the platinum wire to keep the bridge circuit in a thermally balanced condition. A voltage V.sub.h depending on a flow rate and output from the bridge circuit is input to a non-inverting input terminal of an operational amplifier. A sum of the currents output from the first and second constant current circuits connected to the non-inverting and inverting input terminals of the operational amplifier is set to zero by a constant current control circuit when the output voltage V.sub.h is equal to or less than a predetermined value and gradually increases from zero with an increase in the output voltage V.sub.h when V.sub.h is higher than the predetermined value.
    • 一种热流传感器,包括位于流体中的桥接电路,包括作为热电阻器的铂线,空气温度传感器和一对电阻器,以及用于控制流过铂线的电流以保持桥梁的温度控制电路 电路处于热平衡状态。 根据流量和从桥式电路输出的电压Vh被输入到运算放大器的非反相输入端。 当输出电压Vh等于或小于一个时,通过恒定电流控制电路将连接到运算放大器的非反相和反相输入端的第一和第二恒定电流电路输出的电流的总和设置为零 当Vh高于预定值时,输出电压Vh增加,从零开始逐渐增加。
    • 9. 发明授权
    • Heat-sensitive flow sensor
    • 感应流量传感器
    • US5148707A
    • 1992-09-22
    • US560958
    • 1990-08-01
    • Masanori InadaHichiro Ohtani
    • Masanori InadaHichiro Ohtani
    • G01F1/68G01F1/684G01F1/692G01P5/12
    • G01F1/684G01P5/12
    • In a heat-sensitive flow sensor including a bridge circuit composed of a heat-sensitive resistor formed on a substrate provided within a fluid flow passage and a plurality of resistors and a control circuit for controlling current supplied to the heat-sensitive resistor to maintain the bridge circuit in a thermally balanced condition, a flow rate being detected from the thermal balance condition of the bridge circuit, current supply leads and a base portion of the substrate are buried in a heat insulating support member supported by a base. Preferably, lead terminals of the heat-sensitive resistor formed on the base portion are also buried in the heat insulating support member.
    • 在包括由设置在流体流路内的基板上形成的热敏电阻的桥接电路和多个电阻器的热敏流量传感器以及用于控制提供给热敏电阻器的电流来维持 桥接电路在热平衡状态下,从桥接电路的热平衡状态检测流量,将电流供给引线和基板的基部埋入由基座支撑的隔热支撑构件中。 优选地,形成在基部上的热敏电阻器的引线端子也被埋在隔热支撑构件中。