公开(公告)号：US09557390B2

公开(公告)日：2017-01-31

申请号：US14014011

申请日：2013-08-29

申请人： Minelab Electronics Pty Limited

发明人： Laurentiu Stamatescu ,  Sergii Shapoval ,  Lachlan Gunn

IPC分类号： A61B5/05 ,  G01R33/00 ,  G01V3/08

CPC分类号： G01R33/0029 ,  G01V3/088

摘要： A method for detecting a change of an impedance of a magnetic field receiver of a metal detector, including: having a first network of passive components, including the impedance of the magnetic field receiver; having a second network of passive components, excluding the impedance of the magnetic field receiver; and processing a first measurement signal from a first node of the first network with a second measurement signal from a second node of the second network to detect the change in the impedance of the magnetic field receiver; wherein the first network, the second network, the first node, the second node is configured such that in an absence of an external influence which affects the impedance of the magnetic field receiver, the first measurement signal is substantially the same with the second measurement signal; and in a presence of the external influence, the first measurement signal is different from the second measurement signal.

摘要翻译： 一种用于检测金属检测器的磁场接收器的阻抗变化的方法，包括：具有包括磁场接收器的阻抗的无源部件的第一网络; 具有第二无源部件网络，不包括磁场接收器的阻抗; 以及利用来自所述第二网络的第二节点的第二测量信号来处理来自所述第一网络的第一节点的第一测量信号，以检测所述磁场接收器的阻抗的变化; 其中所述第一网络，所述第二网络，所述第一节点，所述第二节点被配置为使得在没有影响所述磁场接收器的阻抗的外部影响的情况下，所述第一测量信号与所述第二测量信号基本相同 ; 并且在存在外部影响的情况下，第一测量信号与第二测量信号不同。