公开(公告)号：US09297677B2

公开(公告)日：2016-03-29

申请号：US14240917

申请日：2012-08-16

Applicant: Kazunori Suzuki ,  Keiichi Nakada ,  Ryo Sato

Inventor： Kazunori Suzuki ,  Keiichi Nakada ,  Ryo Sato

IPC: G01F1/68 ,  G01F1/64 ,  G01F1/696 ,  G01F1/684 ,  G01F5/00

CPC classification number: G01F1/64 ,  G01F1/6842 ,  G01F1/696 ,  G01F1/6965 ,  G01F5/00

Abstract: A gas flow rate measuring apparatus including a gas flow rate detection circuit configured to output a first analog signal of a gas flow rate of a gas; a gas temperature detection element configured to output a second analog signal of a temperature of the gas or a temperature of an integrated circuit; analog-to-digital converters for converting the analog signals into respective digital signals; a digital signal correction device comprising a map table and configured to correct a characteristic bend of the first digital signal based on the map table and the second digital signal, wherein the map table comprises correction constants arranged as lattice points, wherein a first number of lattice points in a first region of the characteristic bend of the gas flow rate signal is larger than a second number of lattice points of a second region outside the first region of the characteristic bend.

Abstract translation: 一种气体流量测量装置，包括：气体流量检测电路，被配置为输出气体的气体流量的第一模拟信号; 气体温度检测元件，被配置为输出所述气体的温度或集成电路的温度的第二模拟信号; 用于将模拟信号转换成相应的数字信号的模数转换器; 数字信号校正装置，包括映射表，并且被配置为基于映射表和第二数字信号校正第一数字信号的特征弯曲，其中，映射表包括布置为格点的校正常数，其中第一数目的格 气体流量信号的特征弯曲的第一区域中的点大于特征弯曲的第一区域外的第二区域的第二数量的格点。

公开(公告)号：US20140190270A1

公开(公告)日：2014-07-10

申请号：US14240917

申请日：2012-08-16

Applicant: Kazunori Suzuki ,  Keiichi Nakada ,  Ryo Sato

Inventor： Kazunori Suzuki ,  Keiichi Nakada ,  Ryo Sato

IPC: G01F1/64

CPC classification number: G01F1/64 ,  G01F1/6842 ,  G01F1/696 ,  G01F1/6965 ,  G01F5/00

Abstract: Gas flow rate measuring apparatus comprising resistive element disposed in a gas flow path, a gas flow rate detection circuit, and a gas temperature detection element or a substrate temperature detection element. The detection circuit detects a current flowing through the resistive element, or a voltage generated in response to the current to output a gas flow rate detection signal in accordance with a flow rate of gas flowing. The apparatus corrects characteristics of the gas flow rate detection signal on the basis of a temperature detection signal obtained from these elements and includes signal conversion means for correcting a characteristic bend displaced by more than a certain fixed amount from target characteristics.

Abstract translation: 气体流量测量装置包括设置在气体流路中的电阻元件，气体流量检测电路和气体温度检测元件或基板温度检测元件。 检测电路检测流过电阻元件的电流或响应电流而产生的电压，以根据气体流量输出气体流量检测信号。 该装置基于从这些元件获得的温度检测信号来校正气体流量检测信号的特性，并且包括用于校正从目标特性偏移超过一定固定量的特征弯曲的信号转换装置。

公开(公告)号：US07631555B2

公开(公告)日：2009-12-15

申请号：US10580112

申请日：2003-11-20

Applicant: Hiroshi Nakano ,  Masamichi Yamada ,  Masahiro Matsumoto ,  Izumi Watanabe ,  Keiji Hanzawa ,  Keiichi Nakada

Inventor： Hiroshi Nakano ,  Masamichi Yamada ,  Masahiro Matsumoto ,  Izumi Watanabe ,  Keiji Hanzawa ,  Keiichi Nakada

IPC: G01F1/68

CPC classification number: G01F1/6965 ,  G01F1/6845

Abstract: A thermal air flowmeter having excellent temperature characteristics and improved measurement accuracy. The thermal air flowmeter includes 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 a heating temperature control 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.

Abstract translation: 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，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。

公开(公告)号：US07559237B2

公开(公告)日：2009-07-14

申请号：US12149242

申请日：2008-04-29

Applicant: Hiromu Kikawa ,  Izumi Watanabe ,  Shinya Igarashi ,  Keiichi Nakada ,  Kei Ueyama

Inventor： Hiromu Kikawa ,  Izumi Watanabe ,  Shinya Igarashi ,  Keiichi Nakada ,  Kei Ueyama

IPC: G01F1/68

CPC classification number: G01F1/6845 ,  G01F1/6842 ,  G01F5/00 ,  G01F15/12

Abstract: The present invention provides an air flow measuring device comprising a housing with a sub-passage having a inlet and a outlet for air flow formed in the housing, the sub-passage further having a predefined curvature with a maximum downstream point and a flow measuring element located in the sub-passage at a position at least further downstream from the point.

Abstract translation: 本发明提供了一种空气流量测量装置，其包括具有子通道的壳体，该子通道具有形成在壳体中的气流的入口和出口，该子通道还具有具有最大下游点的预定曲率和流量测量元件 位于至少在该点下游的位置处的子通道中。

公开(公告)号：US20070024119A1

公开(公告)日：2007-02-01

申请号：US11480979

申请日：2006-07-06

Applicant: Izumi Watanabe ,  Junichi Horie ,  Keiichi Nakada

Inventor： Izumi Watanabe ,  Junichi Horie ,  Keiichi Nakada

IPC: B60L1/00

CPC classification number: G01F1/692 ,  G01F1/6845 ,  G01F1/698

Abstract: A thermal type flow measuring apparatus includes a heating resistor provided in a thin part of a substrate and a bridge circuit for driving the heating resistor to have a preset heating temperature, wherein resistor elements on sides forming the bridge circuit are temperature sensitive resistors, a part or whole of at least one of the temperature sensitive resistors is placed in the thin part and near the heating resistor so that the temperature sensitive resistor is influenced by a heat of the heating resistor, and the preset heating temperature is increased as the flow of fluid is increased. This configuration introduces flow dependency into the heating temperature of the heating resistor.

Abstract translation: 一种热式流量测量装置包括设置在基板的薄部分中的加热电阻器和用于驱动加热电阻器以具有预设加热温度的桥接电路，其中形成桥接电路的侧面上的电阻器元件是温度敏感电阻器， 或整个温度敏感电阻器中的至少一个放置在薄部分和靠近加热电阻器处，使得温度敏感电阻器受到加热电阻器的热量的影响，并且预设加热温度随着流体流动而增加 增加了。 该配置将流依赖性引入加热电阻器的加热温度。

公开(公告)号：US20060144138A1

公开(公告)日：2006-07-06

申请号：US10546174

申请日：2004-05-26

Applicant: Masamichi Yamada ,  Izumi Watanabe ,  Keiichi Nakada ,  Junichi Horie

Inventor： Masamichi Yamada ,  Izumi Watanabe ,  Keiichi Nakada ,  Junichi Horie

IPC: G01F1/68

CPC classification number: G01F1/6845 ,  G01F1/698

Abstract: A thermal flow sensor which is fabricated at a low cost and has improved reliability. Over a cavity (7) formed in a semiconductor substrate (2), at least a heating resistance (4) is formed near the center of the cavity with an electrical insulation film interposed between the heating resistance and the cavity. The temperature (Th) of the heating resistance (4) is controlled to be higher than the medium temperature (Ta) by a constant temperature ({Th=Th−Ta). A distance (Ws) in the direction of airflow from an upstream end of the heating resistance (4) to an upstream end of the electrical insulation film lying over the cavity and the constant temperature (ΔTh) satisfy the following relationship: ΔTh/Ws≦800 (° C./mm) Thus, a thermal flow sensor is provided which can prevent deposition of floating fine particles, such as carbon particles, caused by the thermophoretic effect, can be fabricated at a low cost, and has high reliability.

Abstract translation: 一种以低成本制造并具有改进的可靠性的热流传感器。 在形成在半导体衬底（2）中的空腔（7）上，在腔的中心附近形成至少一个加热电阻（4），其中电绝缘膜置于加热电阻和空腔之间。 加热电阻（4）的温度（Th）通过恒温（{Th = Th-Ta））控制为高于介质温度（Ta）。 从加热电阻（4）的上游端到位于空腔上的电绝缘膜的上游端和恒温（DeltaTh）的气流方向的距离（Ws）满足以下关系： line-formula description =“In-line Formulas”end =“lead”？> DeltaTh / Ws <= 800（°C / mm）<？in-line-formula description =“In-line Formulas”end =“tail 因此，提供了能够防止由热诱导效应引起的诸如碳颗粒的漂浮微粒的沉积的热流量传感器，可以以低成本制造，并且具有高可靠性。

公开(公告)号：US20060065049A1

公开(公告)日：2006-03-30

申请号：US11206820

申请日：2005-08-19

Applicant: Keiichi Nakada ,  Junichi Horie ,  Hiroshi Nakano ,  Izumi Watanabe

Inventor： Keiichi Nakada ,  Junichi Horie ,  Hiroshi Nakano ,  Izumi Watanabe

IPC: G01F1/68

CPC classification number: G01F1/699 ,  G01F1/6842 ,  G01F1/692

Abstract: A Thermal type fluid flow sensor comprises a heating resistor formed on a thin film of a substrate, and plural thermal sensitive resistors configuring a bridge circuit. The thermal sensitive resistors are disposed on the thin film of the substrate so as to be located on an adjacent upstream side and an adjacent downstream side of the heating resistor in a stream direction of fluid to be measured. Resistor traces for the thermal sensitive resistors are formed so that the respective thermal sensitive resistors exhibit substantially equal changes in resistance with each other to distortion caused in the thin film.

Abstract translation: 热式流体流量传感器包括形成在基板的薄膜上的加热电阻器和构成桥接电路的多个热敏电阻器。 热敏电阻器设置在基板的薄膜上，以便沿着待测流体的流动方向位于加热电阻器的相邻上游侧和相邻的下游侧。 形成用于热敏电阻器的电阻迹线，使得相应的热敏电阻器在薄膜中产生的失真相对于电阻变化相当大。

公开(公告)号：US06860149B2

公开(公告)日：2005-03-01

申请号：US10652029

申请日：2003-09-02

Applicant: Shinya Igarashi ,  Atsushi Kanke ,  Rintarou Minamitani ,  Keiichi Nakada ,  Izumi Watanabe

Inventor： Shinya Igarashi ,  Atsushi Kanke ,  Rintarou Minamitani ,  Keiichi Nakada ,  Izumi Watanabe

IPC: G01F1/68 ,  F02D35/00 ,  F02D41/04 ,  F02D45/00 ,  G01F1/696 ,  G01F1/698

CPC classification number: G01F1/6983 ,  F02D41/042

Abstract: To offer a mass airflow measuring apparatus in which the effect of the adhesion onto the heating resistor caused while the engine is off is reduced and the measuring accuracy is improved. The apparatus measures the mass airflow of the air sucked into the internal combustion engine, using the heating resistor 1. The power control circuit 4 maintains the heating resistor 1 temperature equal to or higher than the temperature during the operation of the internal combustion engine after the internal combustion engine has stopped and until the temperature of the internal combustion engine and its apparatuses installed in the suction system has lowered below the generation temperature of volatile gas such as oil vapor. The power control circuit 4, using the temperature sensing resistor 2 that detects the temperature of the air sucked into the combustion engine, detects the air temperature and maintains the heating resistor 1 temperature, based on the temperature measured, equal to or higher than the temperature during the operation of the internal combustion engine even after the internal combustion engine has stopped.

Abstract translation: 提供一种质量气流测量装置，其中在发动机关闭时引起在加热电阻器上的附着力的影响减小，并且提高了测量精度。 该装置使用加热电阻器1测量吸入内燃机的空气的质量气流。功率控制电路4将发热电阻体1的温度保持在等于或高于内燃机运转后的温度 内燃机已经停止，并且直到安装在抽吸系统中的内燃机及其装置的温度降低到低于诸如油蒸气的挥发性气体的发生温度。 功率控制电路4使用检测吸入到内燃机中的空气的温度的温度检测电阻器2，根据测得的温度检测空气温度并维持加热电阻器1的温度等于或高于温度 即使在内燃机停止之后，内燃机的运转也是如此。

公开(公告)号：US06752014B1

公开(公告)日：2004-06-22

申请号：US09653168

申请日：2000-09-01

Applicant: Atsushi Kanke ,  Masamichi Yamada ,  Keiichi Nakada ,  Izumi Watanabe ,  Hisao Sonobe

Inventor： Atsushi Kanke ,  Masamichi Yamada ,  Keiichi Nakada ,  Izumi Watanabe ,  Hisao Sonobe

IPC: G01F168

CPC classification number: G01F1/698 ,  G01F1/6845 ,  G01F1/696

Abstract: A hot-wire type air flow meter for an internal combustion engine has an exothermic resistor film provided on a thin portion formed on a silicon substrate and a control circuit for controlling a voltage to be applied to the resistor film or a current to be supplied. The resistor film is arranged in a suction pipe of the internal combustion engine and heat is emitted to an air through the resistor film. In the case where a liquid droplet is deposited onto the resistor film, the control circuit controls the applied voltage to a value smaller than a voltage which is applied to the resistor film at the time of measuring a maximum specified measuring range or controls the supply current to a value smaller than a current flowing in the resistor film at the time of measuring the maximum specified measuring range.

Abstract translation: 用于内燃机的热线式空气流量计具有设置在形成在硅基板上的薄部分上的放热电阻膜和用于控制施加到电阻膜的电压或要供应的电流的控制电路。 电阻膜布置在内燃机的吸入管中，并且通过电阻膜将热量排放到空气中。 在液滴沉积到电阻膜上的情况下，控制电路将施加的电压控制为比测量最大规定测量范围时施加到电阻膜的电压小的值，或者控制电源电流 达到在测量最大规定测量范围时小于在电阻膜中流动的电流的值。

公开(公告)号：US06571621B2

公开(公告)日：2003-06-03

申请号：US09951967

申请日：2001-09-14

Applicant: Izumi Watanabe ,  Junichi Horie ,  Keiichi Nakada ,  Kei Ueyama

Inventor： Izumi Watanabe ,  Junichi Horie ,  Keiichi Nakada ,  Kei Ueyama

IPC: G01F500

CPC classification number: G01F5/00 ,  G01F1/6842 ,  G01F15/12

Abstract: A thermal type flow rate measuring device can certainly prevent adhesion of water droplet onto a sensor element and thus achieve high reliability. The thermal type flow rate measuring device includes an auxiliary passage defined within a main passage for introducing a part of fluid flowing through the main passage, a sensor disposed within the auxiliary passage for detecting flow rate of the fluid and capturing means formed on an inner periphery of the auxiliary passage for capturing liquid contained in the fluid and transferring the captured liquid.