Seismic SH wave three-dimensional exploration earthquake source device

Abstract

The invention relates to a seismic SH wave three-dimensional exploration earthquake source device which comprises a stepping motor, a servo controller group, a transmission shaft and an earthquake-exciting box body. The stepping motor carries an encoder itself; the encoder is electrically connected with the servo controller group through a connecting line; the shaft center of the output shaft of the motor is connected with the transmission shaft through a bearing; the transmission shaft is equipped with fan blades; the fan blades are connected with the outer disc of the earthquake-exciting box body; the earthquake-exciting box body takes the motor shaft center as a center shaft and is provided with an upper cover, an inner disc and the outer disc, wherein the upper cover is connected with the outer disc, and the bottom portions of the inner disc and outer disc are welded with spike teeth; the motor shaft center passes through the center of the inner disc; the tail end of the shaft center is welded to a bottom cone; the inner disc bottom cone and the spike teeth enable the device to be fixedly arranged on the ground; the motor drives the fan blades through the transmission shaft, and the fan blades drive the outer disc to rotate around the inner disc; and the rotation of the outer disc enables the spike teeth on the bottom portion of the outer disc to generate tangential vibration with the ground, thereby generating SH waves at various directions. The device is concise in structure, portable, convenient to transport, and adjustable in power, and can provide enough seismic exploration energy and meet various geology field exploration, such as engineering investigation and metal mine exploration and the like.

Description

technical field [0001] The invention relates to a three-dimensional seismic source device for seismic SH wave exploration, which belongs to the technical field of seismic and geological exploration. Background technique [0002] Compared with longitudinal waves, shear waves have the advantages of low speed, low frequency, short wavelength, and are not affected by groundwater. Therefore, shear-wave seismic exploration can achieve resolution and accuracy that cannot be achieved by longitudinal-wave seismic exploration, and can better detect the thickness of the Quaternary overburden and the small structures of the underlying bedrock. [0003] There are two types of transverse waves, one is SV wave, which refers to the transverse wave in which the particle vibrates in the vertical plane including the ray, that is, the vibration of the particle and the propagation ray of the wave are both in the vertical plane passing through the survey line, horizontal The geophones are arrang...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a relatively light SH wave seismic source which adopts a targeted excitation mode and can produce a relatively simple seismic SH wave in SH wave exploration, which is suitable for engineering geological exploration and metal mine exploration. device to meet the needs of exploration

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