Joint correction method of errors of MWD inclinometer in underground coal mine

QIAO Meiying; WANG Bo; XIAO Xuejun; XU Chengkuan; YAN Shuhao

doi:10.3969/j.issn.1001-1986.2020.02.030

Volume 48 Issue 2

Apr. 2020

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COAL GEOLOGY & EXPLORATION > 2020 > 48(2): 202-208. > DOI: 10.3969/j.issn.1001-1986.2020.02.030

QIAO Meiying, WANG Bo, XIAO Xuejun, XU Chengkuan, YAN Shuhao. Joint correction method of errors of MWD inclinometer in underground coal mine[J]. COAL GEOLOGY & EXPLORATION, 2020, 48(2): 202-208. DOI: 10.3969/j.issn.1001-1986.2020.02.030

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Joint correction method of errors of MWD inclinometer in underground coal mine

1. School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China;
2. Fourth Geological Team, Hebei Provincial Bureau of Coal Geology, Zhangjiakou 075100, China

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National Natural Science Foundation of China(61573129)

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Received Date: July 15, 2019
Revised Date: August 21, 2019
Published Date: April 24, 2020

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Abstract

Abstract

In order to reduce the error of measuring the drilling attitude angle parameter of MWD inclinometer in coal mine, a mathematical model of error compensation based on recursive least squares was established, the joint correction method of ellipsoid fitting method, dot product invariance method and rotation plane fitting method were used in the error compensation correction for MWD inclinometer. Numerical simulation experiment and double-axis turntable experiment were carried out on the developed MWD inclinometer, error compensation correction of experimental data was conducted with joint correction method, the maximum absolute errors of pitch angle and azimuth angle before correction are 4.7° and 5.1°, after correction are 0.8° and 0.9°, the corrected measurement accuracy meets the requirements of MWD inclinometer. Experimental results show that this method can be used to effectively compensate the error correction of MWD inclinometer in underground coal mine.
- MWD inclinometer in underground coal mine,
- joint correction,
- the error compensation correction,
- pitch angle,
- azimuth angle

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