A downhole transient electromagnetic instrument anti-metal interference device

Abstract

The utility model discloses a kind of underground transient electromagnetic instrument anti-metal interference devices, it is related to geophysical prospecting technical field, including transient electromagnetic instrument main body, transmitting coil shell, difference filter, auxiliary compensation coil shell, main receiving coil shell, the inside wall of transmitting coil shell is smeared with high magnetic permeability shielding layer.The utility model design structure is reasonable, it can pass through the design of adjustable transmitting coil and auxiliary compensation coil, can doublely suppress metal interference signal from source and receiving end, greatly improve signal-to-noise ratio;Device according to the specific distribution dynamic adjustment operating parameter of underground metal interference, applicable to different geological conditions and the environment of interference intensity;The intelligent signal processing unit in current regulator interior combines multi-channel acquisition and time-frequency analysis technology, effectively separates interference signal and target signal, improves the accuracy of data interpretation, realizes the purpose that this device efficiently reduces surrounding metal interference.

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