Method for measuring spectrum parameters of formation outcrop and rock mass

A device for measuring spectrum parameters of a formation outcrop and a rock mass, comprising:

• a signal transmission portion;
• and
• a signal receiving portion;
• wherein the signal transmission portion comprises a grounding electrode A, a grounding electrode B, a microcontroller unit (MCU), a direct digital synthesis (DDS) module, a polarity conversion module, a signal amplification module, a mode switching module, a constant voltage/constant current module, a power amplification module and a current acquisition module;
• the MCU, the DDS module, the polarity conversion module, the signal amplification module, the mode switching module, the constant voltage/constant current module and the power amplification module are connected in sequence;
• an output signal of the power amplification module is configured to be output to ground through the grounding electrode A and the grounding electrode B to form a first transmission loop circuit;
• an input end of the current acquisition module is connected to the power amplification module, and an output end of the current acquisition module is connected to the MCU;
• a frequency signal generated by the signal transmission portion is configured to be sequentially subjected to polarity conversion, signal amplification and connection to the grounding electrode A and the grounding electrode B to form a second transmission loop circuit;
• and the current acquisition module is configured to record information about output voltage, current and time of each frequency point to the MCU in real time;
• and
• the signal receiving portion comprises a grounding electrode M, a grounding electrode N, a pre-amplification module, a notch/pass-through module, a bandpass filtration module, a programmable gain amplification module and an analog-digital converter (ADC) module;
• the grounding electrode M and the grounding electrode N are connected to the pre-amplification module;
• the pre-amplification module, the notch/pass-through module, the bandpass filtration module, the programmable gain amplification module, the ADC module and the MCU are connected in sequence;
• the signal receiving portion is configured to acquire a frequency response signal of an underground medium through the grounding electrode M and the grounding electrode N, such that the frequency response signal is sequentially subjected to signal pre-amplification, signal conditioning, ADC conversion and post-processing by the MCU, so as to form spectrum characteristic information of the formation outcrop or the rock mass within a preset frequency bandwidth.