Moving-coil type 5Hz geophone

Abstract

The invention discloses a moving-coil type 5Hz geophone. The geophone includes an insulator, a top cover, coils, a shell, a bottom cover, a lower contact sheet, snap springs, magnetic boots, a magnetic body, a temperature compensation ring, insulation spacers, spring sheets, flat gaskets and sealing rings. The ratio of the inner ring radius of a spring sheet to the outer ring radius of the springsheet is R1:R2=0.62; an upper coil skeleton is provided with an upper weight reduction groove, a lower coil skeleton is provided with a lower weight reduction groove, and the width ratio of the upperweight reduction groove to the lower weight reduction groove is L1:L2=2.5; and the length-diameter ratio of the magnetic body is H2:D=0.4, the height ratio of the height of the magnetic body to the magnetic conductive surface height of the magnetic boots is H2:H1=1.07, and the height ratio of the upper edge of the magnetic boots to the magnetic conductive surface of the magnetic boots is H3:H1= 0.21. The moving-coil 5Hz geophone has the characteristics of low natural frequency, high output sensitivity, good index uniformity, a large inclination angle, low harmonic distortion, reliability and durability.

Description

technical field [0001] The invention relates to a geophone, in particular to a velocity-type moving coil type 5Hz high-performance seismic wave acquisition sensor, which belongs to the technical field of geophones. Background technique [0002] With the development of geophysical exploration technology, deep, broadband and high-resolution exploration has become the development trend of the industry. With the improvement of low-frequency excitation technology, low-frequency receiving sensors have become an urgent need for the geophysical industry. [0003] A conventional seismic track is a seismic reflection signal recorded by a series of geophones combined, and it is the superposition result of signals received by multiple geophones at different positions. The detector string suppresses environmental noise and coherent noise through the combination of multiple detectors, and at the same time highlights the signal, which can improve the signal-to-noise ratio. However, due to...

AI Technical Summary

Problems solved by technology

However, due to the inconsistency of the parameters of the single geophones in conventional geophone acquisition, the different surface conditions and coupling states of the single geophones, the superimposed output of multiple geophones in the string is prone to large distortion, and the details of the target layer are destroyed due to superposition. The distortion of the original data leads to the lack of flexibility in the later data processing. The single channel and single geophone receive the original data, which can describe the properties of the underground strata in a greater degree.

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