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High-precision terrestrial magnetism vector measuring method and device thereof

A measurement method and high-precision technology, applied in measurement devices, geophysical measurements, radio wave measurement systems, etc., can solve the problems of complicated preparation work, large additional magnetic field value, and high coil power consumption, etc., to improve measurement efficiency and preparation. The effect of simple work and low coil power consumption

Active Publication Date: 2014-07-23
CHINA METALLURGICAL GEOLOGY BUREAU GEOLOGICAL EXPLORATION INST OF SHANDONG ZHENGYUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing technology needs to strictly orient the east-west direction of the coil attached to the probe of the total field magnetometer, or adjust it to the orientation orthogonal to the geomagnetic field vector to be measured in the earth's horizontal plane and the meridian plane. For fixed stations, it is not suitable for large-scale rapid measurement in the field; the existing technology needs to accurately compensate the geomagnetic vertical component with a field value of tens of thousands of nT, the required additional magnetic field value is large, and the coil current providing the additional magnetic field requires a large power Steady current for a long time, the power consumption of the coil is large, the device is relatively bulky, not suitable for field mobile measurement

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  • High-precision terrestrial magnetism vector measuring method and device thereof
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  • High-precision terrestrial magnetism vector measuring method and device thereof

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Experimental program
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Effect test

Embodiment 1

[0094] Measure the geomagnetic vector with the device used in the high-precision geomagnetic vector measuring method of the present invention, place the tripod in the device used in the high-precision geomagnetic vector measuring method at the intended observation position, and make the plane of the circular vial on the top of the tripod roughly centered ;Adjust the leveling knob of the tripod so that the two vertical and horizontal vials on the coil are in the center state, use the collimator to align with the ground direction mark set in advance according to the azimuth angle D0 of the section, at this time the azimuth angle of the horizontal coil is D0, measure Proceed as follows:

[0095] 1. The total field magnetometer probe 14 is installed at the coincident place of the geometric center of the vertical coil and the horizontal coil, and the total field magnetometer probe 14 is connected with the total field magnetometer 22 by a wire;

[0096] ②Adjust the tripod so that th...

Embodiment 2

[0110] Measure the geomagnetic vector with the device used in the high-precision geomagnetic vector measuring method of the present invention, place the tripod in the device used in the high-precision geomagnetic vector measuring method at the intended observation position, and make the plane of the circular vial on the top of the tripod roughly centered ;Adjust the tripod leveling knob so that the two vertical and horizontal vials on the vertical coil are in the center state. At this time, the vertical coil is in the vertical state. The measurement steps are as follows:

[0111] ① Place the probe of the total field magnetometer in the middle of the vertical coil, and the vertical coil is a Helmholtz coil;

[0112] ② Connect the vertical coil to the excitation power supply through a wire, and set a band switch on the excitation power supply;

[0113] ③Adjust the switch of the excitation power supply so that the excitation power supply does not energize the vertical coil, and u...

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Abstract

The invention provides a high-precision terrestrial magnetism vector measuring method and a device of the high-precision terrestrial magnetism vector measuring method. The high-precision terrestrial magnetism vector measuring method comprises the following steps that (1) a total field magnetometer probe is arranged in the middle of a vertical coil; (2) the vertical coil is connected with a coil excitation power source through a wire; (3) a terrestrial magnetic field To without an additive magnetic field is measured through a total field magnetometer; (4) a resultant magnetic field T+T of a forward magnetic field of the vertical coil and the terrestrial magnetic field is measured through the total field magnetometer; (5) a resultant magnetic field T-Tof a reverse magnetic field of the vertical coil and the terrestrial magnetic field is measured through the total field magnetometer. The device of the high-precision terrestrial magnetism vector measuring method comprises a tripod, wherein a horizontal dial is installed on the tripod, a rotary drum is installed on the dial, a coil holder is installed on a fixed column, two half-shaft supports are installed on the coil holder, half shafts are connected with a vertical coil framework through connecting plates, the vertical coil framework is connected with a horizontal coil framework, and the total field magnetometer probe is installed at the position of coincidence of the geometric center of the vertical coil and the geometric center of a horizontal coil. The high-precision terrestrial magnetism vector measuring method and the device of the high-precision terrestrial magnetism vector measuring method are suitable for large-area rapid measurement in geophysical exploration field general prospecting work.

Description

technical field [0001] The invention relates to the technical field of fine measurement of the geophysical geomagnetic field, and relates to a high-precision geomagnetic vector measurement method and a device thereof. Background technique [0002] Geomagnetic vector measurement can effectively reduce the multi-solution in geophysical exploration and inversion, and contribute to the qualitative and quantitative interpretation of magnetic bodies. At present, the geomagnetic field measurement instruments commonly used by geophysical prospecting workers at home and abroad are ordinary proton magnetometers, optical pump magnetometers or overhauser proton magnetometers. These magnetometers are easy to use in the field, and the measurement accuracy has reached or better than 1nT. They can measure the scalar value of the total geomagnetic field strength. However, the total field magnetometer cannot measure the geomagnetic vector. A fluxgate three-component magnetometer with low pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/40
CPCG01V1/00G01V3/40G01V2200/00E21B10/00
Inventor 高建东刘蕾
Owner CHINA METALLURGICAL GEOLOGY BUREAU GEOLOGICAL EXPLORATION INST OF SHANDONG ZHENGYUAN