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    • 3. 发明授权
    • Magnetic sensing element, magnetic sensor, and its manufacturing method
    • 磁传感元件,磁传感器及其制造方法
    • US07183767B2
    • 2007-02-27
    • US10506556
    • 2003-03-24
    • Sayuri MuramatsuKen TakahashiYoshihiro TosakiAkio Murata
    • Sayuri MuramatsuKen TakahashiYoshihiro TosakiAkio Murata
    • G01R33/02G01R33/00
    • G01R33/02
    • A conductive wire held between a first magnetic core of a soft magnetic film and a second magnetic core, the area of the cross-section, perpendicular to a magnetic path, of which is made partially smaller constitutes a magnetic detection device, and a DC current for generating a DC bias magnetic field and a high-frequency carrier signal are let to flow through the conductive wire. The DC current is selected so that the portion at which the cross-sectional area of the above-mentioned second magnetic core is made smaller has an appropriate DC bias magnetic field intensity. When this magnetic detection device is placed in an external magnetic field, the intensity of the DC bias magnetic field changes depending on the intensity of the external magnetic field; hence, the level of the carrier signal in the conductive wire changes. The change of the level of the carrier signal is output as the change of an electrical signal, whereby the intensity and direction of the magnetic field are detected.
    • 保持在软磁性膜的第一磁芯和第二磁芯之间的导线,垂直于磁路的横截面的面积部分较小构成磁检测装置,并且DC电流 用于产生DC偏置磁场和高频载波信号使其流过导线。 选择直流电流使得使上述第二磁芯的横截面积减小的部分具有适当的DC偏置磁场强度。 当该磁检测装置被置于外部磁场中时,直流偏置磁场的强度根据外部磁场的强度而变化; 因此,导线中的载波信号的电平变化。 输出载波信号电平的变化作为电信号的变化,由此检测磁场的强度和方向。
    • 4. 发明授权
    • Magnetic sensor having a closed magnetic path formed by soft magnetic films
    • 具有由软磁膜形成的闭合磁路的磁传感器
    • US07145331B2
    • 2006-12-05
    • US10478136
    • 2002-07-15
    • Akio KuroeSayuri MuramatsuAkio MurataKen TakahashiYoshihiro Tosaki
    • Akio KuroeSayuri MuramatsuAkio MurataKen TakahashiYoshihiro Tosaki
    • G01R33/02
    • G11B5/332G01R33/02G11B5/335Y10T29/49002Y10T428/1171
    • In order to obtain a magneto-impedance type magnetic sensor having a soft magnetic film facing to a conductive nonmagnetic film, and available a large impedance change with a carrier signal at a relatively low frequency, the magnetic sensor comprises a meander type conductive nonmagnetic thin film of zigzag shape formed with at least one pair of electrode terminals at both ends and a soft magnetic film which is strip-shaped so as to face thereto at a plurality of regions and has an easy axis of magnetization in a width direction of the strip shape, a high frequency carrier signal is applied to the above-mentioned electrode terminals and further a direct current bias magnetic field is applied. By performing AM detection of an AM modulation signal output from the above-mentioned electrode terminals, an impedance change of the conductive nonmagnetic film which is changed by external magnetic field is detected as a change of the high frequency carrier signal, thereby the external magnetic field can be detected.
    • 为了获得具有面向导电非磁性膜的软磁性膜的磁阻型磁传感器,并且以较低频率的载波信号具有较大的阻抗变化,磁传感器包括弯曲型导电非磁性薄膜 在两端形成有至少一对电极端子的锯齿形状,以及在多个区域呈带状的软磁性膜,并且在带状的宽度方向上具有容易的磁化轴 ,向上述电极端子施加高频载波信号,并施加直流偏置磁场。 通过对从上述电极端子输出的AM调制信号进行AM检测,检测由外部磁场变化的导电性非磁性膜的阻抗变化,作为高频载波信号的变化,由此外部磁场 可以检测。
    • 5. 发明申请
    • Magnetic sensing element magnetic sensor and its manufacturing method
    • 磁传感元件磁传感器及其制造方法
    • US20050179431A1
    • 2005-08-18
    • US10506556
    • 2003-03-24
    • Sayuri MuramatsuKen TakahashiYoshihiro TosakiAkio Murata
    • Sayuri MuramatsuKen TakahashiYoshihiro TosakiAkio Murata
    • G01R33/02G01R33/00
    • G01R33/02
    • A conductive wire held between a first magnetic core of a soft magnetic film and a second magnetic core, the area of the cross-section, perpendicular to a magnetic path, of which is made partially smaller constitutes a magnetic detection device, and a DC current for generating a DC bias magnetic field and a high-frequency carrier signal are let to flow through the conductive wire. The DC current is selected so that the portion at which the cross-sectional area of the above-mentioned second magnetic core is made smaller has an appropriate DC bias magnetic field intensity. When this magnetic detection device is placed in an external magnetic field, the intensity of the DC bias magnetic field changes depending on the intensity of the external magnetic field; hence, the level of the carrier signal in the conductive wire changes. The change of the level of the carrier signal is output as the change of an electrical signal, whereby the intensity and direction of the magnetic field are detected.
    • 保持在软磁性膜的第一磁芯和第二磁芯之间的导线,垂直于磁路的横截面的面积部分较小构成磁检测装置,并且DC电流 用于产生DC偏置磁场和高频载波信号使其流过导线。 选择直流电流使得使上述第二磁芯的横截面积减小的部分具有适当的DC偏置磁场强度。 当该磁检测装置被置于外部磁场中时,直流偏置磁场的强度根据外部磁场的强度而变化; 因此,导线中的载波信号的电平变化。 输出载波信号电平的变化作为电信号的变化,由此检测磁场的强度和方向。