Research on new signal transmission method of Dual-Frequency Induced Polarization

Aiming at the problems of the traditional Dual-Frequency Induced Polarization(IP) transmitter only sends the combined rectangular wave, the output energy utilization rate is not high enough, and the received back is affected by inductive coupling peak interference and harmonic pollution, a new dual-frequency IP signal transmission scheme was designed and the experimental device was made. The transmission of dual frequency combined sine waves and dual frequency square wave-sine combined waves has been achieved. Furthermore, the comparison experiments were carried out with the SQ-5 Dual-Frequency Induced Polarization Instrument produced by Hunan Geosun High-technology Co., Ltd.. By comparing the results of RC induced polarization simulation tests and field experiments, it was proved that the new dual-frequency signal is equivalent to the observed results of traditional dual-frequency combined rectangular wave transmission, the transmission signal energy utilization rate is very high. It can suppress or eliminate the inductive coupling peak and harmonic pollution at the receiving end, improve the signal-to-noise ratio at the receiving end. This method has a good application prospect.