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High-accuracy geomagnetic vector measurement method and device

A high-precision, geomagnetic technology, applied in measurement devices, geophysical measurements, radio wave measurement systems, etc., can solve problems such as field measurement methods and instruments for high-precision geomagnetic vectors that have never been seen before

Inactive Publication Date: 2013-11-13
高建东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no high-precision geomagnetic vector field measurement method and instrument suitable for field prospecting and exploration.

Method used

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  • High-accuracy geomagnetic vector measurement method and device
  • High-accuracy geomagnetic vector measurement method and device
  • High-accuracy geomagnetic vector measurement method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Attached figure 2 The shown setup achieves a complete measurement of the geomagnetic vector with high precision, measuring all components of the geomagnetic field. The device includes a horizontal coil and a vertical coil attached to the probe of a high-precision total field magnetometer, a magnetometer probe, a direction sight, a tripod, a magnetometer host, an additional coil excitation control circuit, and a magnetic field vector calculation module.

[0065] The two sets of additional magnetic field coils are orthogonal to each other, the centers of the coils coincide, and the probe of the total field magnetometer is placed in the center of the coils. One set of coil axes is perpendicular to the ground, called vertical coils. The other group of coil axes are horizontal and arbitrarily fixed, called horizontal coils. The coil adopts Figure 4 standard Helmholtz coils as shown or Figure 5 , Image 6 In the improved Helmholtz coil shown, the center of the coil is...

Embodiment 2

[0074] Attached image 3 The shown device realizes high-precision partial measurement of geomagnetic vector, and can measure geomagnetic field components other than magnetic declination D. The device includes a vertical coil attached to the probe of a high-precision total field magnetometer, a magnetometer probe, a tripod, a magnetometer host, an additional coil excitation control circuit, and a magnetic field vector calculation module. Compared with the complete measuring device of high-precision geomagnetic vector shown in Embodiment 1, the horizontal coil and direction collimator related to the measurement of geomagnetic declination D are cancelled. The measuring device cooperates with a high-precision total field magnetometer to measure the vertical component Z, horizontal component H and inclination I of the earth's magnetic field.

[0075] The coil adopts Figure 4 standard Helmholtz coils as shown or Figure 5 , Image 6 In the improved Helmholtz coil shown, the axi...

Embodiment 3

[0084] This embodiment is a high-precision geomagnetic vector complete measurement method, using the attached figure 2 The high-precision geomagnetic vector complete measuring device as shown measures the normal geomagnetic field without additional magnetic field and the 4 composite magnetic field values ​​when additional horizontal and vertical positive magnetic field and reverse magnetic field are added, and calculates the vertical component Z, horizontal component H, Inclination I and declination D, as well as horizontal components of the magnetic field in other orientations, include the following steps:

[0085] (A) Place a tripod at the position to be observed so that the top plane of the tripod is approximately horizontal, and place the additional magnetic field coil equipped with a high-precision total field magnetometer probe on the tripod;

[0086] (B) Adjust the leveling knob of the tripod to center the vertical and horizontal blisters on the coil. At this time, the...

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Abstract

A high-accuracy geomagnetic vector measurement method is characterized in that a vertical additional magnetic field and a horizontal additional magnetic field which have the same intensity but different directions are added to the position of a probe of a high-accuracy total-field magnetometer; a geomagnetic field without additional magnetic fields and a resultant magnetic field with an additional forward magnetic field and an additional reversed magnetic field are measured respectively; and then, each component, including a vertical component Z, a horizontal component H, a geomagnetic inclination I and a declination D, of a geomagnetic vector can be computed, and the method is suitable for fast and high-accuracy geomagnetic vector measurement outdoors or in a fixed station. According to the method, the geomagnetic vector measuring accuracy is in positive correlation with the accuracy of the matched magnetometer, and the high-accuracy total-field magnetometer is superior to a fluxgate three-component magnetometer with 10 nT of measuring errors. A high-accuracy geomagnetic vector field measurement device comprises one group or two groups of field coils and a tripod, the field coils are added to the outside of the high-accuracy total-field magnetometer probe, and the field measurement device is matched with the high-accuracy total-field magnetometer and used for rapidly measuring each component of the geomagnetic vector outdoors or in the fixed station.

Description

[0001] technology field, [0002] The invention relates to a high-precision geomagnetic vector measurement method and an instrument, and belongs to the technical field of fine geophysical geomagnetic field measurement. Background technique [0003] Geomagnetic vector measurement can effectively reduce the multi-solution in geophysical survey and inversion, and contribute to the qualitative and quantitative interpretation of magnetic bodies. At present, the field measuring instruments of the geomagnetic field 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, the measurement accuracy has reached or better than lnT, and they can measure the scalar value of the total geomagnetic field strength, collectively referred to as high-precision total field magnetometers. [0004] The total field magnetometer cannot measure t...

Claims

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Application Information

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IPC IPC(8): G01V3/40
CPCG01V1/00G01V3/40G01V2200/00E21B10/00
Inventor 高建东
Owner 高建东
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