Elastic wave phase-controlled transmitting and retrosynthetic receiving method

Abstract

The invention discloses an elastic wave phase-controlled transmitting and retrosynthetic receiving method, and belongs to the field of geological exploration. The method involves a transmitting part and a receiving part; the transmitting part comprises a slot wave analyzer, a solid-state amplifier, a power dividing module, a plurality of transmitting path program-controlled phase shifters and a plurality of elastic wave transmitting antennas; and the receiving part comprises a plurality of elastic wave receiving antennas, a plurality of receiving path program-controlled phase shifters and a vector module. According to the method, a phase-controlled transmitting technology is used for converting single-pulse modulation carrier transmitting signals subjected to pre-emphasis and power division processing into elastic waves containing detection information through the elastic wave transmitting antennas, and the elastic waves are coupled to a target stratum channel to be transmitted; and aretrosynthetic receiving technology is used for receiving the elastic waves of different paths, propagated by the ground and reflected by all interfaces, through the elastic wave receiving antennas, parameters of a plurality of slot wave echo signals are fused, and a modulation function of a geological structure to the slot wave signals with different frequencies is synthesized, so that the precision of slot wave analysis is improved, and relatively high geological structure detection resolution is obtained.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to an elastic wave phase-controlled transmitting, inversely combining and receiving method. Background technique [0002] At present, human beings have very little understanding of the deep part of the earth. Therefore, it is imminent to advance the layout, seize the high ground of deep-earth research, and actively promote the exploration of the frontier big scientific issues of deep-earth foundation. With the continuous development of exploration technology, various exploration methods have emerged. Among them, the channel wave seismic exploration technology mainly uses the guided wave excited and propagated in the underground coal seam to effectively detect local small structures, abnormal bodies and coal seams existing in the coal seam. The change of thickness can effectively guide the underground coal mining work in coalfields, which is of great significance to safe mining....

AI Technical Summary

Problems solved by technology

[0003] Aiming at the fact that the existing single-pulse-modulated carrier transmission signal cannot meet the requirements of slot wave analysis, the present invention provides an elastic wave phase-controlled transmission inverse synthesis and reception method

Images