Detection of passing magnetic articles while adapting the detection threshold
    42.
    发明授权
    Detection of passing magnetic articles while adapting the detection threshold 有权
    检测通过的磁性物品,同时适应检测阈值

    公开(公告)号:US06525531B2

    公开(公告)日:2003-02-25

    申请号:US09859093

    申请日:2001-05-16

    IPC分类号: G01P348

    摘要: A method for detection of passing magnetic articles which includes an initial step of sensing an ambient magnetic field and generating a voltage, Vsig, proportional to the magnetic field. A threshold voltage is generated as a percentage of the peak-to-peak voltage of Vsig. The method further includes the step of generating a detector output voltage that becomes one binary level when Vsig rises to exceed the threshold voltage and another binary level when Vsig falls to below the threshold voltage. The threshold voltage is updated to track the positive and negative peaks of the Vsig voltage upon each transition of the Vout voltage.

    摘要翻译: 用于检测通过磁性制品的方法,其包括感测周围磁场并产生与磁场成比例的电压Vsig的初始步骤。 产生阈值电压作为Vsig的峰 - 峰电压的百分比。 该方法还包括以下步骤:当Vsig上升到超过阈值电压时,产生检测器输出电压,该电压变为一个二进制电平,当Vsig下降到阈值电压以下时,产生另一二进制电平。 阈值电压被更新以跟踪Vout电压的每个跃迁时的Vsig电压的正和负峰值。