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1. 发明申请

US20200158906A1 Metal Detector 审中-公开
公开(公告)号：US20200158906A1
公开(公告)日：2020-05-21
申请号：US16690489
申请日：2019-11-21
申请人： Minelab Electronics Pty. Limited
发明人： Philip Shane Wahrlich , Ruifeng Huang
IPC分类号： G01V3/165 , G01V3/38
摘要： A method for detecting a target using a metal detector, including: transmitting a transmit magnetic field using a transmitter based on a multiple-frequency transmit signal; receiving a receive magnetic field due to the transmit magnetic field using a receiver to produce a receive signal; processing the receive signal using at least two sets of demodulation functions; each set including at least two demodulation functions that substantially complement each other such that when at a particular time one has a low sensitivity to a particular noise signal, the other has an effective sensitivity to detect that particular noise signal; each of at least two of the at least two demodulation functions is sensitive to at least two frequencies; and each of at least two of the at least two sets of demodulation functions is sensitive to different frequencies of the transmit signal; selecting a set of demodulation functions from the at least two sets of demodulation functions which produces the lowest noise in the step of processing the receive signal; and processing a subsequent receive signal using a linear combination of the at least two demodulation functions of the selected set of demodulation functions to produce an output signal indicative of the target within an influence of the transmit magnetic field.

2. 发明申请

US20210231824A1 Metal Detector 有权
公开(公告)号：US20210231824A1
公开(公告)日：2021-07-29
申请号：US17160584
申请日：2021-01-28
申请人： Minelab Electronics Pty. Limited
发明人： Ruifeng Huang , Eng Leng Mah
IPC分类号： G01V3/10
摘要： A method to detect a target in a soil using a metal detector, the method including transmitting a transmit magnetic field based on a transmit signal using a transmitter; receiving a receive magnetic field due to the transmit magnetic field using a receiver; producing a receive signal based on the receive magnetic field; processing the receive signal to produce a movement signal which is sensitive to a movement of a sensor head of the metal detector relative to the Earth's magnetic field; and updating operating parameters of the metal detector based on the movement signal.

3. 发明公开

US20240345184A1 Metal Detector 审中-公开
公开(公告)号：US20240345184A1
公开(公告)日：2024-10-17
申请号：US18577426
申请日：2022-07-08
申请人： Minelab Electronics Pty. Limited
发明人： Sergii Shapoval , Alexander Albert John Makarowsky , Laurentiu Stamatescu , Philip Shane Wahrlich , Ruifeng Huang , Zili Xu
IPC分类号： G01R33/028 , B65F1/16
CPC分类号： G01R33/028 , B65F1/16 , B65F2210/1525
摘要： A metal detector in a cover of a container, including a first winding; an inner winding with a surface area that is less than that of the first winding; and an outer winding with a surface area that is greater than that of the first winding. The inner winding is connected in series with the outer winding such that a magnetic coupling between (a) the first winding and (b) the inner and outer windings connected in series is substantially zero. Shapes, locations and numbers of turns of the inner winding and the outer winding are selected such that the metal detector is less sensitive to a metal object outside the outer winding than inside the outer winding.

4. 发明授权

US10838103B2 Effective target detection depth information for metal detectors 有权
公开(公告)号：US10838103B2
公开(公告)日：2020-11-17
申请号：US16115972
申请日：2018-08-29
申请人： Minelab Electronics Pty Limited
发明人： Ruifeng Huang
IPC分类号： G01V3/28 , G01V3/38 , G01V3/10 , G01V3/165 , G01V3/08
CPC分类号： G01V3/38 , G01V3/081 , G01V3/10 , G01V3/165
摘要： A method for detecting an electrically conductive target in soil using a metal detector including the steps of: generating a transmit magnetic field for transmission into the soil based on the transmit signal; receiving a receive magnetic field; providing a receive signal induced by the receive magnetic field; determining a noise in the receive signal or a signal to noise ratio of the receive signal; and estimating, based on either the noise in the receive signal, or the signal to noise ratio of the received signal, or both, at least one effective detection depth of one or more types of electrically conductive targets in the soil.

5. 发明申请

US20190064384A1 Signal Processing Technique for Metal Detector 审中-公开
公开(公告)号：US20190064384A1
公开(公告)日：2019-02-28
申请号：US16115972
申请日：2018-08-29
申请人： Minelab Electronics Pty Limited
发明人： Ruifeng Huang
IPC分类号： G01V3/38 , G01V3/10
摘要： A method for detecting an electrically conductive target in soil using a metal detector including the steps of: generating a transmit magnetic field for transmission into the soil based on the transmit signal; receiving a receive magnetic field; providing a receive signal induced by the receive magnetic field; determining a noise in the receive signal or a signal to noise ratio of the receive signal; and estimating, based on either the noise in the receive signal, or the signal to noise ratio of the received signal, or both, at least one effective detection depth of one or more types of electrically conductive targets in the soil.

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