A high-precision moving coil geophone
A geophone and moving-coil technology, applied in seismic signal receivers, seismology, instruments, etc., can solve the constraints of the geophone's ability to detect weak signals, uneven distribution of fit clearance and assembly stress, and failure to retrieve earthquakes Geophone and other problems, to achieve the effect of low deformation rate, easy assembly, and prevent slipping
Active Publication Date: 2017-12-29
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
The problems caused by the assembly method of the geophone that have been neglected have gradually become prominent and become an important factor affecting the performance of the geophone
[0003] The current internal spring and the housing of the geophone are fixed by mechanical fit, and there are fit gaps and uneven distribution of assembly stress, which directly leads to crosstalk between vibration signals in different directions, making false frequencies appear in the seismic exploration frequency band , restricting the ability of the detector to detect weak signals
[0004] Currently, no geophones have been retrieved that use a non-mechanical connection between the leaf spring and the housing
Method used
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[0025] 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.
[0026] Such as figure 1 As shown, a high-precision moving coil geophone according to an embodiment of the present invention includes a housing 1, a top cover 2, a bottom cover 3, a three-arm spring piece 7, a coil frame 4, a coil 8, a magnetic steel 5, and a magnetic shoe 6. The inner ring 71 of the three-arm spring sheet 7 and the top cover 2 or bottom cover 3 are fixedly bonded by resin rubber 9, and the outer ring 72 of the thr...
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The invention relates to the technical field of seismic detection and provides a high-precision moving-coil geophone, including a housing, a top cover, a bottom cover, three-arm spring leaves, a coil crack, a coil, magnetic steel and magnetic boots. The three-arm spring leaves are fixedly bonded with the top cover, the bottom cover and the coil crack through resin rubber. The three-arm spring leaves, the top cover, the bottom cover and the coil crack are provided with assembling holes, and the resin rubber achieves connection through the assembling holes. Holes to relax stress are reserved in the middle of the resin rubber in the assembling holes. The resin rubber is unidirectional crystalline resin rubber. A resin material, a doping material and a ratio are determined according to the resin rubber colloid glass transition temperature. The beneficial effects are that the spring leaves are fixedly bonded by resin, the holes to relax stress are reserved in the middle of the resin rubber, and the rubber crystallization direction and the colloid glass transition temperature are controlled by changing the resin material, the doping material and the ratio thereof, so that the assembling stress and the thermal stress are effectively eliminated, the detection precision is greatly improved, and the application prospect is wide.
Description
technical field [0001] The invention relates to the technical field of seismic detection, in particular to a high-precision moving-coil geophone. Background technique [0002] At present, in the field of seismic exploration, the exploration of deep high-quality oil and gas resources puts forward strict requirements on the weak signal acquisition ability of geophones. Thanks to the application of digitization and feedback technology, geophones can obtain higher accuracy. become a development trend. The problems caused by the assembly method of the geophone that have been neglected have gradually become prominent and become an important factor affecting the performance of the geophone. [0003] The current internal spring and the housing of the geophone are fixed by mechanical fit, and there are fit gaps and uneven distribution of assembly stress, which directly lead to crosstalk between vibration signals in different directions, making false frequencies appear in the seismic...
Claims
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IPC IPC(8): G01V1/18
CPCG01V1/182
Inventor 辛维杨长春于胜利姚沛忠薛旭
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI