Variable frequency hydraulic impact vibration source

Abstract

The invention discloses a variable frequency hydraulic impact vibration source comprising a mechanical impact device used for impacting rock to generate a vibration signal, a hydraulic system used fordriving the mechanical impact device to move; and a control system used for controlling the hydraulic system to act so as to control the frequency of the vibration signal, and to receive and processthe vibration signal to form a closed-loop control; the mechanical impact device is connected with the hydraulic system; the hydraulic system is connected with the control system; the control system is connected with the mechanical impact device. Compared with the prior art, the variable frequency hydraulic impact vibration source provided by the invention can perform closed-loop control on the vibration frequency of the vibration source, so as to improve the quality of the vibration signal, the seismic detection waves can be motivated in a targeted manner, the interferences caused by other vibrations can be excluded as much as possible, the proportion of the vibration signal is effectively improved, the signal to noise ratio is increased, and thus the geological detection accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, and more specifically relates to a frequency-variable hydraulic shock source. Background technique [0002] In the process of tunnel construction, in order to avoid geological disasters such as water and mud inrush, landslides, etc., it is necessary to detect the geological conditions in front of the tunnel face in advance, especially whether there are faults or broken zones, so as to formulate reasonable treatment measures in advance and response plans. [0003] In the prior art, explosives, sledgehammers or giant magnetostrictive seismic sources are often used as seismic sources to excite seismic wave signals. Explosive seismic sources have high safety risks, and improper operation can easily cause casualties and equipment damage; It is operated in a construction tunnel, and the quality of the excited seismic wave is not high and uncontrollable; the giant magnetostrictive source is...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, explosives, sledgehammers or giant magnetostrictive seismic sources are often used as seismic sources to excite seismic wave signals. Explosive seismic sources have high safety risks, and improper operation can easily cause casualties and equipment damage; It is operated in a construction tunnel, and the quality of the excited seismic wave is not high and uncontrollable; the giant magnetostrictive source is expensive and easily damaged, so it is very limited in practical engineering applications

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