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    • 1. 发明申请
    • Pipeline Inspection Tool with Double Spiral EMAT Sensor Array
    • 双螺旋EMAT传感器阵列管道检测工具
    • US20100327858A1
    • 2010-12-30
    • US12642031
    • 2009-12-18
    • James SimekJed LudlowJohn H. FloraSyed M. AliHuidong Gao
    • James SimekJed LudlowJohn H. FloraSyed M. AliHuidong Gao
    • G01N27/82
    • G01N27/87
    • A pipeline inspection tool includes two pole magnets oriented at an oblique angle relative to the central longitudinal axis of the tool body. An array of sensor coil sets is located between opposing edges of the two pole magnets and oriented perpendicular to the central longitudinal axis. Each sensor coil set includes a transmitter coil and two opposing pairs of receiver coils that are gated to receive reflections from the wall of a tubular member. Because the line of sensor coils is rotated relative to the magnetic bias field, the receiver coils are in-line with, and have the same angular orientation as, the transmitter coil. The tool provides improved sensitivity to small defects, substantial decrease in RF pulser power requirements, full circumferential coverage, self-calibration of the transmitted signals, and less interference between transmitter coils caused by acoustic ring around.
    • 管道检查工具包括相对于工具主体的中心纵向轴线倾斜定向的两个磁极。 传感器线圈组的阵列位于两个极磁体的相对边缘之间并且垂直于中心纵向轴线定向。 每个传感器线圈组包括发射器线圈和两个相对的接收器线圈对,其被门控以从管状构件的壁接收反射。 因为传感器线圈的线相对于磁偏置场旋转,所以接收器线圈与发射器线圈成一直线并具有相同的角度定向。 该工具提供对小缺陷的改进的灵敏度,RF脉冲发生器功率要求的显着降低,全周期覆盖,发射信号的自校准以及由环形周围引起的发射器线圈之间的较小干扰。
    • 2. 发明授权
    • Pipeline inspection tool with double spiral EMAT sensor array
    • 双螺旋EMAT传感器阵列管道检测工具
    • US08319494B2
    • 2012-11-27
    • US12642031
    • 2009-12-18
    • James SimekJed LudlowJohn H. FloraSyed M. AliHuidong Gao
    • James SimekJed LudlowJohn H. FloraSyed M. AliHuidong Gao
    • G01R19/18G01R19/22
    • G01N27/87
    • A pipeline inspection tool includes two pole magnets oriented at an oblique angle relative to the central longitudinal axis of the tool body. An array of sensor coil sets is located between opposing edges of the two pole magnets and oriented perpendicular to the central longitudinal axis. Each sensor coil set includes a transmitter coil and two opposing pairs of receiver coils that are gated to receive reflections from the wall of a tubular member. Because the line of sensor coils is rotated relative to the magnetic bias field, the receiver coils are in-line with, and have the same angular orientation as, the transmitter coil. The tool provides improved sensitivity to small defects, substantial decrease in RF pulser power requirements, full circumferential coverage, self-calibration of the transmitted signals, and less interference between transmitter coils caused by acoustic ring around.
    • 管道检查工具包括相对于工具主体的中心纵向轴线倾斜定向的两个磁极。 传感器线圈组的阵列位于两个极磁体的相对边缘之间并且垂直于中心纵向轴线定向。 每个传感器线圈组包括发射器线圈和两个相对的接收器线圈对,其被门控以从管状构件的壁接收反射。 因为传感器线圈的线相对于磁偏置场旋转,所以接收器线圈与发射器线圈成一直线并具有相同的角度定向。 该工具提供对小缺陷的改进的灵敏度,RF脉冲发生器功率要求的显着降低,全周期覆盖,发射信号的自校准以及由环形周围引起的发射器线圈之间的较小干扰。