Pseudo-random coding seismic source system

Abstract

The invention provides a pseudo-random coding seismic source system. The system comprises an upper computer, a controller, an AC voltage regulation module and a seismic source. The controller is connected with the upper computer and the AC voltage regulating module; the upper computer is used for generating a pseudo-random sequence and transmitting the pseudo-random sequence to the controller; thecontroller is used for decoding a received pseudo-random sequence into a pulse sequence and controlling the output voltage of the AC voltage regulation module through the pulse sequence, the AC voltage regulation module is connected with a seismic source to supply power to the seismic source, and the reciprocating impact frequency of the seismic source is controlled by controlling the output voltage change frequency of the AC voltage regulation module. Pseudo-random coding and a mechanical shock source are combined to realize pseudo-random variable-frequency shock of the source, and the anti-interference capability of seismic signals is enhanced. And meanwhile, through superposition of impact energy for multiple times, maximization of seismic source excitation energy is achieved, the intensity and reliability of seismic signals are improved, and the effective distance of geological prediction is increased.

Description

technical field [0001] The invention relates to the technical field of a controllable shock source for seismic geological exploration, in particular to a pseudo-random coded source system. Background technique [0002] Major geological problems in national economic construction, various mineral resources needed, water resources and environmental problems, tunnel construction safety problems, etc. are the conditions and basis for social stability and sustainable development. Geological survey and geological forecast are the main technical means to overcome these problems , The hazards of construction accidents caused by unknown geological conditions are huge. Effective geological survey and geological forecast play an important role in information-based construction, disaster prevention and safety assurance, and are an indispensable link in mineral resource mining and tunnel construction. [0003] How to effectively realize the precise survey and forecast of geological struct...

AI Technical Summary

Problems solved by technology

The electromagnetic geological prediction system is mainly effective for the geological structure of the water-rich layer, and the advantages of water body detection are outstanding, but the detection effect for caves, faults, broken zones, etc. is not obvious

In addition, the existing controllable mechanical seismic source geological prediction system has the problems of short detection distance and poor detection accuracy. The main reasons are the serious influence of noise and interference and the insufficient impact energy of the seismic source.

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