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Correction method for mining borehole clinometer probe tube

A calibration method and technology of the inclinometer, which are applied in the directions of surveying, instrumentation, earthwork drilling and mining, etc., can solve the problems of complex calculation, and achieve the effects of high precision, simple and reliable operation, and low requirements.

Inactive Publication Date: 2016-07-27
TAIYUAN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

This method is computationally complex, and the inclinometer probe is tubular, so this method is not applicable
Therefore, the traditional method of calibrating the electronic compass cannot be directly applied to the calibration of the inclinometer probe, and a calibration method for the inclinometer probe is needed

Method used

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  • Correction method for mining borehole clinometer probe tube
  • Correction method for mining borehole clinometer probe tube
  • Correction method for mining borehole clinometer probe tube

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Embodiment Construction

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used To explain the present invention, not to limit the present invention.

[0025] Implement a method for calibrating the probe tube of a mining borehole inclinometer, the method is to install the probe tube on a three-dimensional non-magnetic rotating platform, collect the data of the magnetic sensor and the acceleration sensor at any position, and recursively minimize the The square ellipsoid fitting method is used to calculate the correction parameters; by collecting the data points of the inclinometer probe around the X axis and the Z axis, the least square plane fitting method is used to calculate the ...

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Abstract

The invention discloses a correction method for a mining borehole clinometer probe tube. The correction method for the mining borehole clinometer probe tube comprises the steps that correction parameters are calculated through a recursive least square ellipsoid fitting process by collecting any position data of a magnetic sensor and an acceleration sensor in the three-dimensional non-magnetic rotary platform clinometer probe tube; misalignment errors between the magnetic sensor and the acceleration sensor in the three-dimensional non-magnetic rotary platform clinometer probe tube and a clinometer probe tube shell carrier are calculated through a least square planar fitting method by collecting the data of the magnetic sensor and the acceleration sensor in the three-dimensional non-magnetic rotary platform clinometer probe tube around the X axis and the Z axis; the errors of the magnetic sensor and the acceleration sensor and the soft and hard iron error of the magnetic sensor are obtained; and the misalignment errors between the magnetic sensor and the clinometer probe tube shell carrier as well as between the acceleration sensor and the clinometer probe tube shell carrier are corrected. According to the correction method for the mining borehole clinometer probe tube, the geomagnetic field and gravitational acceleration are used for correction, the errors of a three-axis sensor and the misalignment errors between the three-axis sensor and the coordinate system of the probe tube shell carrier are compensated, the inclination precision of the corrected mining borehole clinometer probe tube is + / -0.2 degree, and the precision of the azimuth angle of the corrected mining borehole clinometer probe tube is+ / -0.5 degree.

Description

technical field [0001] The invention relates to a method for calibrating a probe tube of a mine borehole inclinometer, in particular to a method for calibrating a probe tube of an inclinometer with a built-in magnetic sensor and an acceleration sensor. Background technique [0002] Following the fields of oil drilling and trenchless drilling, directional drilling technology is widely used in the coal mining industry at present. With the continuous development of directional drilling technology, the measurement-while-drilling technology has been greatly promoted in the drilling construction of surface and underground coalbed methane (gas) drainage in coal mine areas by virtue of its outstanding technical advantages. Measurement-while-drilling technology is a drilling method that uses directional drilling rigs to control the drilling trajectory, drills at different depths and reaches the designed position through monitoring and control means. It has been used in geological exp...

Claims

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Application Information

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IPC IPC(8): E21B47/02G01V13/00
CPCE21B47/02G01V13/00
Inventor 宋建成梁伟嘉刘宗伟
Owner TAIYUAN UNIV OF TECH
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