Magnetic field sensor having a switchable drive current spatial distribution
    12.
    发明申请
    Magnetic field sensor having a switchable drive current spatial distribution 有权
    具有可切换驱动电流空间分布的磁场传感器

    公开(公告)号:US20060009923A1

    公开(公告)日:2006-01-12

    申请号:US11227307

    申请日:2005-09-15

    IPC分类号: G01B7/00

    CPC分类号: G01N27/82 G01N27/902

    摘要: Magnetic field sensor probes are disclosed which comprise primary or drive windings having a plurality of current carrying segments. The relative magnitude and direction of current in each segment are adjusted so that the resulting interrogating magnetic field follows a desired spatial distribution. By changing the current in each segment, more than one spatial distribution for the magnetic field can be imposed within the same sensor footprint. Example envelopes for the current distributions approximate a sinusoid in Cartesian coordinates or a first-order Bessel function in polar coordinates. One or more sensing elements are used to determine the response of a test material to the magnetic field. These sense elements can be configured into linear or circumferential arrays.

    摘要翻译: 公开了磁场传感器探针,其包括具有多个载流段的初级或驱动绕组。 调整每个段中的电流的相对幅度和方向,使得所得到的询问磁场遵循所需的空间分布。 通过改变每个段中的电流,可以在相同的传感器覆盖区内施加多于一个磁场的空间分布。 当前分布的示例包络近似于笛卡尔坐标中的正弦波或极坐标中的一阶贝塞尔函数。 一个或多个感测元件用于确定测试材料对磁场的响应。 这些感测元件可以被配置成线性或圆周阵列。