Calibration device and calibration method for magnetic probe in TEM well

A technology of calibration device and calibration method, which is applied in geophysical measurement, instruments, etc., can solve problems such as difficulty in realization and difficulty in making large-diameter ring coils, and achieve the effects of convenient movement, small size, and uniform magnetic field

Inactive Publication Date: 2014-05-21
中国地质科学院地球物理地球化学勘查研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is difficult to manufacture high-precision large-diameter toroidal coils
During the test, the probe is in the middle of the toroidal coil, and it is required to be on the same plane as the toroidal coil. In addition, high-precision rotation is required, which is very difficult to achieve

Method used

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  • Calibration device and calibration method for magnetic probe in TEM well
  • Calibration device and calibration method for magnetic probe in TEM well
  • Calibration device and calibration method for magnetic probe in TEM well

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Embodiment Construction

[0047] The invention relates to a calibration device and a calibration method for a magnetic probe in a TEM well.

[0048] The calibration device of the magnetic probe in the TEM well includes a Helmholtz coil, a tripod, and a probe in the TEM well, among which:

[0049] The tripod is arranged on the top of the Helmholtz coil, the tripod has a central circular hole, and the outer periphery of the central circular hole is provided with a dial with a 360° scale that can rotate relative to the tripod;

[0050] When calibrating and testing, the probe in the TEM well is passed through the central hole of the tripod, and the probe in the TEM well is connected to the dial on the tripod through a clamp.

[0051] The Helmholtz coil is formed by winding multiple turns of enameled wire on two completely parallel square coil skeletons.

[0052] An arc-shaped vernier is arranged on the outer periphery of the dial on the tripod, and the accuracy of the vernier is 0.1°.

[0053] The bottom...

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Abstract

The invention relates to a calibration device and method for a magnetic probe in a TEM well. The device comprises a Helmholtz coil, a foot stand and a probe in the TEM well, wherein the foot stand is arranged on the top of the Helmholtz coil, and is provided with a central round hole; a calibrated dial with scales of 360 degrees is rotationally arranged on the periphery of the central round hole; during calibration and testing, the probe in the TEM well is inserted into the central round hole of the foot stand, and is connected with the calibrated dial on the foot stand through a hoop. The mounting accuracy (error) of an Hy coil and Hx coil of a horizontal component probe and a posture measuring component can be measured accurately, and the orthogonal deviation values of the Hy and Hx coils can be tested accurately.

Description

technical field [0001] The invention relates to a calibration device and a calibration method for a magnetic probe in a TEM well. Background technique [0002] TEM is short for Transient Electromagnetic Method in Geophysical Exploration. The research and development of the transient electromagnetic (ground-well TEM) method, which is launched on the ground and received in the well, began in the 1970s, and in-depth research and wide application began in the mid-1980s. At present, the ground-well TEM three-component instrument is relatively mature in terms of stability, positioning accuracy, observation precision, etc., and can meet the needs of ground-well TEM measurement. Foreign ore prospecting practices show that ground-well TEM has become an important exploration method for conductive ore bodies, especially when the ground electromagnetic method is used because the ore body depth is too large, or in the presence of electrical interference factors (such as conductive cover...

Claims

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Application Information

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IPC IPC(8): G01V13/00
Inventor 黄跃沈钟冯晓兰牛瑞峰杜庆丰李丽华纪改玲
Owner 中国地质科学院地球物理地球化学勘查研究所
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