Electrical prospecting method and measuring device

Abstract

The invention discloses an electrical prospecting method and a measuring device. The method comprises the following steps of: transmitting a current waveform serving as an excitation signal with pseudo-random code characteristics to the underground through a transmitter; receiving a voltage signal generated by the excitation signal through a receiver; mathematically processing to obtain a pulse transition function; obtaining an amplitude-frequency curve and a phase frequency curve in a corresponding frequency range through fast Fourier transform; obtaining an amplitude value and a phase value of each frequency point; and obtaining apparent resistivity and phase parameters with geophysical meaning through the parameters. The device comprises a transmitter consisting of a computer, a programmable logic device, a transmitter clock synchronization circuit, a logic sequence generator, a self-sampling processing circuit, a direct current power supply, a drive and protection circuit, a self-sampling filtering circuit and a power supply electrode AB, and a receiver consisting of a filtering and protecting circuit, an amplifying and analog / digital sampling circuit, a programmable logic device and a computer. The device has good anti-interference performance, can perform effective measurement at low power and can be matched with a plurality of sets of equipment to perform measurement simultaneously.

Description

technical field [0001] The invention relates to an electrical prospecting method. In particular, it relates to an electrical prospecting method and a measuring device in the active source frequency domain with strong anti-interference. Background technique [0002] Non-ferrous metals are widely used and important in status, and are important strategic resources in my country's national economy and national defense construction. As my country's low-value-added non-ferrous metal products are exported at low prices and the contradictions of iron ore and high-end products relying heavily on imports are becoming more and more prominent, improving the self-sufficiency of resources, supporting the development of the national economy and even ensuring national security are becoming more and more important. It is necessary to carry out the exploration of deep ore and concealed ore in the deep part of or near the production mine and the corresponding metallogenic belt. [0003] Elect...

AI Technical Summary

Problems solved by technology

However, due to factors such as safety and technology, the power supply current cannot be increased indefinitely, and in areas where human activities are frequent, such as mining areas in production, along railway lines, high-voltage corridors, cities, and market towns, the method of increasing the power supply current is limited by the strong stray current. Still powerless in the face of interference

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