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Speed type magnetoelectric seis

A geophone and magnetoelectric technology, applied in the direction of seismic signal receivers, etc., can solve the problems of difficult processing and assembly, large noise and harmonic distortion, and large volume of AlNiCo magnets, and achieve easy assembly, Low distortion, reliable effect

Inactive Publication Date: 2007-12-19
WEIHAI SUNFULL GEOPHYSICAL EXPLORATION EQUIP
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  • Abstract
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  • Claims
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Problems solved by technology

The performance of the above two forms of geophones mainly depends on the design level and manufacturing level of AlNiCo magnets, coils, and spring sheets; the disadvantages are that AlNiCo magnets are large in size, heavy in weight, high in cost, and difficult to process and assemble. The difficulty is high, the noise and harmonic distortion caused by the looseness between the upper and lower coils are relatively large, and the bandwidth is limited

Method used

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  • Speed type magnetoelectric seis

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Embodiment Construction

[0009] It can be seen from Fig. 1 that a velocity type magnetoelectric geophone includes magnet steel, yoke iron 2, 5, shell 3, coil system, upper cover 1, lower cover 6, spring sheets 7, 10 , lead wire 11, yoke iron 2, 5 are cap-shaped, are fixed on the upper and lower ends of the magnetic steel, the outer of the magnetic steel is provided with a housing 3, and the upper and lower sides of the housing 3 are respectively provided with an upper cover 1 and a lower cover 6, and the upper cover 1 is provided with Positive and negative leads 11.

[0010] The present invention is characterized in that: the magnetic steel is samarium cobalt magnetic steel 8, samarium cobalt magnetic steel 8, yoke iron 2, 5, and housing 3 form a magnetic circuit, the housing 3 and samarium cobalt magnetic steel 8, yoke iron 2, 5 A coil system is provided between them, and the coil system is composed of two coils 4 wound in opposite directions and a coil frame 9, and is supported by two spring pieces ...

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Abstract

A magenetoelectric seismic detector of speed type is prepared as setting yoke iron at top and bottom ends of Sm-Co magnetic steel and arranging shell at external of said magnetic steel, setting top and bottom covers at top and bottom of shell, arranging coil system formed by two cols and coil framework between shell and Sm-Co magnetic steel / yoke iron and using two spring plates set on top and bottom yoke irons to support said coil system. Its method for detecting earthquake is also disclosed.

Description

technical field [0001] The invention relates to a geophone, in particular to a velocity type magnetoelectric geophone. Background technique [0002] We know that the extraction of signals in geological exploration in petroleum and coal industries is done by detectors. Existing detectors include magnetoelectric speed sensors, displacement sensors, acceleration, piezoelectric, capacitive, piezoresistive and other sensors. At present, the commonly used geophone is a magnetoelectric speed sensor, and its structure is mainly composed of alnico magnet, coil, spring leaf, shell, upper cover, lower cover, yoke, electrode, damper and so on. The yoke is in the shape of a hat, fixed on both sides of the magnetic steel, and forms a magnetic circuit with the shell to gather magnetism. The enameled wire coil is wound in the magnetic gap formed by the magnetic steel, the yoke and the shell, and is supported by the upper and lower spring pieces. When the outside world vibrates, the coil r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/18G01V1/16
Inventor 颜永安孙中心星学奎张桂先刘永川王书军李庆丽王巧艳
Owner WEIHAI SUNFULL GEOPHYSICAL EXPLORATION EQUIP
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