瞬变电磁探测仪的设计

EM is a promising detection method in the field of geophysical exploration currently, but as an important detection tool, the current transient electromagnetic instrument has many deficiencies. In this paper, two parts from hardware and software were designed mainly for the deficiencies. In the side of hardware, in order to solve the problems of large dynamic range of signal in full time domain, weakness transient state process and difficult sampling of terminal signal, IGBT full-bridge circuit and the Difference Double Transistor amplifier and multilevel magnification system including Programmable amplifier are applied. Meanwhile equivalent sampling was proposed and programmable Antenna was designed. In the side of software, firstly, based on LBVIEWE， transient electromagnetic data were pretreated, and then field collected transient electromagnetic data were resolved by using one-dimensional inversion theory.