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Six-component seismic data and absolute gravity measuring instrument and measuring method

A seismic data and gravity measurement technology, which is applied in geophysical measurement, measurement devices, and gravitational field measurement, to achieve the effects of enhancing sensitivity, improving quality, and improving data acquisition efficiency

Pending Publication Date: 2021-04-13
PEKING UNIV
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Problems solved by technology

[0005] In view of the fact that current geophysical instruments can only observe single physical property data, the present invention proposes an instrument and measurement method that can be used for six-component seismic data and absolute gravity measurement

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  • Six-component seismic data and absolute gravity measuring instrument and measuring method
  • Six-component seismic data and absolute gravity measuring instrument and measuring method
  • Six-component seismic data and absolute gravity measuring instrument and measuring method

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] Six-component earthquake and absolute gravity measurement principle such as figure 1 As shown, the rotating seismometer and the translation seismometer with sensitive axes in the three directions of x, y, and z are fixed on the frame shown in the figure, and the fixed frame is placed at the point to be measured. Six-component seismic and absolute gravity measurement methods are attached figure 2 As shown, three translational seismometers measure seismic translation three-component data, and three rotational seismometers measure seismic rotation three-component data, and the input data processing unit of translation seismometer and rotation seismometer orthogonal to each other in x and y directions can be Solve for absolute gravity.

[0026] Specifically, the velocity type translational seismometer with sensitive axes in x, y, and z directions and the angula...

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Abstract

The invention discloses a six-component seismic data and absolute gravity measuring instrument and a measuring method. The method comprises the following steps: 1) placing a fixed frame at a to-be-measured position, wherein three rotary seismometers are fixed on three mutually perpendicular side walls of the fixed frame, and three translational seismometers are fixed on three mutually perpendicular side walls of the fixed frame; 2) sending three orthogonal rotation components theta x, theta y and theta z measured by the three rotary seismometers to a data processing unit, and sending three orthogonal translation components dx, dy and dz measured by the three translation seismometers to the data processing unit; and 3) calculating a gravitational acceleration g by the data processing unit according to a formula, wherein s is equal to j2pif, and f is an observation frequency. Simultaneous obtaining of an absolute gravity and six-component seismic data can be achieved, data collection efficiency is greatly improved, and a low-cost and high-efficiency scheme is provided for exploration.

Description

technical field [0001] The invention relates to a six-component seismic data and absolute gravity measuring instrument and measuring method, which can be used in the field of geophysical data observation, such as the observation of earth seismic wave field and gravity field, measurement of gravitational constant, development of mineral resources, development of geothermal resources, and geophysical exploration , earthquake and geological disaster early warning and other engineering and scientific research fields. Background technique [0002] Human beings need to rely on geophysical data observation instruments to detect the earth's underground space, such as gravimeters (including absolute gravimeters and relative gravimeters; gravity here refers to the acceleration of gravity, the same below), magnetometers, resistivity meters, magnetotellurics, Seismographs, gamma meters, etc., can detect different physical properties, so as to detect underground information from differen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V7/00
CPCG01V7/00
Inventor 陈彦钧操玉文曾卫益朱兰鑫李正斌
Owner PEKING UNIV
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