Study on Magnetic Induced Polarization Technology and Instruments

Abstract

In order to solve the difficult-ground areas of electromagnetic prospecting, we study magnetic induced polarization technology and instruments. Adopting the techniques such as GPS synchronization, CPLD(Complex Programmable Logic Device), digital PWM(Pulse-Width Modulation) constant current, VHDL(Very high speed integrated circuit Hardware Description Language) programming, a magnetic induced polarization instruments have been developed, which include transmitter, receiver, and three components magnetic field compensator. Instruments have functions such as high-power constant-current supplying, frequency-selective anti-interference receiving, GPS high-precision synchronizing, and amplitude-frequency response of magnetic sensor is flat. Using gradient configuration to obser the original data include magnetic field strength, magnetic polarization rate, phase, and get the magnetometric resistivity, the percent frequency efficiency by the further processing. For magnetic induced polarization instruments, we develop performance testing and the field experiments.