Design of transient electromagnetic instrument for mining
This paper designed a new downhole dynamic imaging transient electromagnetic instrument.During the primary field shutdown period of the transmitter,the inductive load electric quantity inside the transmitting coil is rapidly discharged through the fast discharge circuit,shortening the primary field shutdown time and the shallow detection blind area;The receiver adopts dual chan-nels to collect secondary field signals,and through data splicing processing,the dynamic range of signal reception can reach over 180 db.The main controller of the transient electromagnetic instrument is a low-power micro industrial computer,which is processed by a pumping algorithm program under the Linux operating system to achieve rapid imaging of apparent resistivity.
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维普
