Method for removing electromagnetic interference (EMI) signal by transient electromagnetic instrument background field guidance frequency-selecting technology
A technology of transient electromagnetic instrument and background field control, which is applied in the field of geophysical exploration and can solve problems such as strengthening
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[0021] Now in conjunction with the accompanying drawings, the method for removing the electromagnetic interference signal by the background field guidance frequency selection technology of the coal mine underground transient electromagnetic instrument of the present invention is further elaborated:
[0022] see figure 1 , the coal mine underground transient electromagnetic instrument adopted in the method of the present invention comprises the transmitter 19 that transmitting circuit 15 and transmitting coil 18 form, the receiver 13 that receiving circuit 9 and receiving coil 14 form, receiver 13 and transmitter 19 use The cable 20 realizes synchronous control. The transmitting coil 18 and receiving coil 14 are ungrounded loops, superimposed on the underground geological body (coal seam or surrounding rock) of the coal mine, and the transmitting coil 18 and receiving coil 14 are respectively connected to the transmitting circuit 15 and the receiving circuit 9 .
[0023] When ...
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