Device and method for acquisition and processing of rock electromagnetic radiation signal

A device and method for acquisition and processing of a rock electromagnetic radiation signal belong to the field of a rock test instrument. The device is composed of an omnidirectional antenna, a signal amplification circuit, a filtering circuit, an A/D conversion circuit and an FPGA minimum system. The omnidirectional antenna is composed of a first magnetic bar antenna, a second magnetic bar antenna, a first adjustable double-connection capacitor, a first magnetic ring transformer, a second double-connection capacitor, a second magnetic ring transformer and a third magnetic ring transformer. The FPGA minimum system comprises an original electromagnetic radiation signal receiving module, a signal decomposition and extraction module, a signal amplitude standard difference calculation module, a noise adding module, a signal division module, a signal denoising module, a signal reconstruction module and a signal frequency-division module. After omnidirectional acquisition and amplification-filtering processing a