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Metal detector apparatus utilizing controlled phase response to reject ground effects and to discriminate between different types of metals
Metal detector apparatus utilizing controlled phase response to reject ground effects and to discriminate between different types of metals
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机译:金属探测器设备利用受控的相位响应来抑制地面影响并区分不同类型的金属
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摘要
Metal detector apparatus includes a controlled phase responsiveness to allow operation with reduced ground effects while discriminating between different types of metals. A phase relationship is predetermined that will reject unwanted signals from mineralized ground and trash metals and will be responsive to the signals from desired metals. The algebraic relationship between two signals is determined so that only input signals falling within the desired algebraic relationship are used to provide an output signal.
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