A moving-coil low-frequency extended geophone

Abstract

The invention provides a moving coil type low-frequency expanded geophone, and relates to the technical field of seismic detection. The geophone comprises a casing, a top cover, a bottom cover, magnetic steel and a spring suspension system; the spring suspension system comprises a spring, a coil rack and a coil; the spring suspension system is fixed in an enclosed space between the top cover and the bottom cover, and the coil rack is connected to a differential capacitor detection system radially; the differential capacitor detection system comprises a sensor, a measurement and control circuit, an analog to digital conversion module and a storage module; the sensor is connected with the coil rack and the measurement and control circuit, the measurement and control circuit is connected with the analog to digital conversion module, and the analog to digital conversion module is connected with the storage module; and eight groups of differential capacitors are distributed between the internal diameter and the external diameter uniformly. The moving coil type low-frequency expanded geophone has the advantages that the differential capacitors are added to detect displacement signals, flatter low-frequency response can be obtained on the premise that original frequency response is not influenced, the structure is simple and reasonable, and the geophone can be popularized and applied widely.

Description

technical field

[0001] The invention relates to the technical field of seismic detection, in particular to a moving-coil low-frequency extended geophone. Background technique

[0002] Geophones are sensors used to detect ground motion. In the field of seismic exploration, as the depth of the exploration target layer increases, high-frequency signals attenuate severely, and low-frequency signals remain intact. The imaging of low-frequency seismic information can greatly improve the accuracy of deep strata description, thereby enhancing the ability of deep resource exploration.

[0003] The moving coil geophone is the most widely used geophone at present. The traditional moving coil geophone is a velocity type geophone. Due to the limitations of the inherent mechanical system, this geophone has defects such as low sensitivity and narrow frequency band (>10Hz), and its low frequency response is severely attenuated, which has become a bottleneck restricting the development o...

Examples

Embodiment Construction

[0026] Specific embodiments of the present invention will be described in detail below in conjunction with specific drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be regarded as isolated, and they can be combined with each other to achieve better technical effects. In the drawings of the following embodiments, the same reference numerals appearing in each drawing represent the same features or components, which can be applied in different embodiments.

[0027] like figure 1 , 2 As shown, a moving-coil low-frequency extended geophone according to an embodiment of the present invention includes a housing 1, a top cover 2, a bottom cover 3, and a spring suspension system; Constitute a confined space; the spring suspension system includes springs, coil frame 4, coil 5, and magnetic steel 6; the upper and lower sets of coils 5 are reversely wound on the coil frame 4, and the spring s...

technical field

[0001] The invention relates to the technical field of seismic detection, in particular to a moving-coil low-frequency extended geophone. Background technique

[0002] Geophones are sensors used to detect ground motion. In the field of seismic exploration, as the depth of the exploration target layer increases, high-frequency signals attenuate severely, and low-frequency signals remain intact. The imaging of low-frequency seismic information can greatly improve the accuracy of deep strata description, thereby enhancing the ability of deep resource exploration.

[0003] The moving coil geophone is the most widely used geophone at present. The traditional moving coil geophone is a velocity type geophone. Due to the limitations of the inherent mechanical system, this geophone has defects such as low sensitivity and narrow frequency band (>10Hz), and its low frequency response is severely attenuated, which has become a bottleneck restricting the development o...

Examples

Embodiment Construction

[0026] Specific embodiments of the present invention will be described in detail below in conjunction with specific drawings. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be regarded as isolated, and they can be combined with each other to achieve better technical effects. In the drawings of the following embodiments, the same reference numerals appearing in each drawing represent the same features or components, which can be applied in different embodiments.

[0027] like figure 1 , 2 As shown, a moving-coil low-frequency extended geophone according to an embodiment of the present invention includes a housing 1, a top cover 2, a bottom cover 3, and a spring suspension system; Constitute a confined space; the spring suspension system includes springs, coil frame 4, coil 5, and magnetic steel 6; the upper and lower sets of coils 5 are reversely wound on the coil frame 4, and the spring s...

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