Exploration method of geological information

Abstract

The invention discloses an exploration method of geological information, comprising the following steps of: selecting a specific sequence code; processing the specific sequence code and then modulating to a low-frequency carrier signal in a spectrum spreading way, and amplifying the modulated carrier signal; converting an amplified electrical signal into an elastic wave containing certain exploration information by a loudspeaker (an elastic wave transmitting antenna), and coupling into an earth channel to carry out transmission; receiving elastic wave signals with different paths which are transmitted by the earth and reflected by stratum interfaces by a sound pick-up (an elastic wave receiving antenna); converting the obtained elastic wave signals into the electric signals again; removing the noise and the interference of the obtained electric signals by using a frequency-selective filter, and carrying out equalization processing, frequency spectrum analysis and digital signal processing on the obtained electric signals; and then computing the parameters, i.e. multipath delay, signal energy, noise energy and signal-to-noise ratio of a multipath signal according to a relevant algorithm of multipath signal processing after microcomputer data processing and fusion.

Description

technical field [0001] The invention relates to a geological information prospecting method, in particular to a geological information prospecting method based on spread spectrum technology and correlation reception. Background technique [0002] Traditional geological exploration generally uses microseismic exploration methods. It is based on the principle of elastic mechanics, when the vertical exciting force acts on the surface of the homogeneous foundation, the propagation phenomenon of elastic waves generated from near to far on the surface of the foundation and inside, including longitudinal waves (P waves) and shear generated by compression deformation. The deformation produces shear waves (S waves), and when these two waves couple, a large number of Rayleigh waves (R waves) are generated. People often use the R-wave velocity, which is easier to measure, to determine the S-wave velocity of the ground. According to the semi-long wave theory, the average velocity v of...

AI Technical Summary

Problems solved by technology

This geological information exploration method carries spread spectrum information with sufficient code length in the emitted elastic wave for detection, which solves the adverse effects of ground disturbance on information transmission and the problem of channel fading; uses elastic wave as the carrier of the detection signal, and electromagnetic wave Compared with low-frequency elastic waves, the transmission attenuation in the earth's crust is relatively small, and they have excellent carrier characteristics and penetration capabilities; correlation detection and reception at the receiving end solve the problem of weak signals, low signal-to-noise ratio and channel interference at the receiving point. Difficult signal reception and unreliable communication problems

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