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Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer

Rotating Accelerometer Gravity Gradiometers (RAGGs) play a significant role in applications such as resource exploration and gravity aided navigation. Scale factor calibration is an essential procedure for RAGG instruments before being used. In this paper, we propose a calibration system for a gravi...

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Autores principales: Deng, Zhongguang, Hu, Chenyuan, Huang, Xiangqing, Wu, Wenjie, Hu, Fangjing, Liu, Huafeng, Tu, Liangcheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308669/
https://www.ncbi.nlm.nih.gov/pubmed/30544994
http://dx.doi.org/10.3390/s18124386
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author Deng, Zhongguang
Hu, Chenyuan
Huang, Xiangqing
Wu, Wenjie
Hu, Fangjing
Liu, Huafeng
Tu, Liangcheng
author_facet Deng, Zhongguang
Hu, Chenyuan
Huang, Xiangqing
Wu, Wenjie
Hu, Fangjing
Liu, Huafeng
Tu, Liangcheng
author_sort Deng, Zhongguang
collection PubMed
description Rotating Accelerometer Gravity Gradiometers (RAGGs) play a significant role in applications such as resource exploration and gravity aided navigation. Scale factor calibration is an essential procedure for RAGG instruments before being used. In this paper, we propose a calibration system for a gravity gradiometer to obtain the scale factor effectively, even when there are mass disturbance surroundings. In this system, four metal spring-based accelerometers with a good consistency are orthogonally assembled onto a rotary table to measure the spatial variation of the gravity gradient. By changing the approaching pattern of the reference gravity gradient excitation object, the calibration results are generated. Experimental results show that the proposed method can efficiently and repetitively detect a gravity gradient excitation mass weighing 260 kg within a range of 1.6 m and the scale factor of RAGG can be obtained as (5.4 ± 0.2) E/μV, which is consistent with the theoretical simulation. Error analyses reveal that the performance of the proposed calibration scheme is mainly limited by positioning error of the excitation and can be improved by applying higher accuracy position rails. Furthermore, the RAGG is expected to perform more efficiently and reliably in field tests in the future.
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spelling pubmed-63086692019-01-04 Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer Deng, Zhongguang Hu, Chenyuan Huang, Xiangqing Wu, Wenjie Hu, Fangjing Liu, Huafeng Tu, Liangcheng Sensors (Basel) Article Rotating Accelerometer Gravity Gradiometers (RAGGs) play a significant role in applications such as resource exploration and gravity aided navigation. Scale factor calibration is an essential procedure for RAGG instruments before being used. In this paper, we propose a calibration system for a gravity gradiometer to obtain the scale factor effectively, even when there are mass disturbance surroundings. In this system, four metal spring-based accelerometers with a good consistency are orthogonally assembled onto a rotary table to measure the spatial variation of the gravity gradient. By changing the approaching pattern of the reference gravity gradient excitation object, the calibration results are generated. Experimental results show that the proposed method can efficiently and repetitively detect a gravity gradient excitation mass weighing 260 kg within a range of 1.6 m and the scale factor of RAGG can be obtained as (5.4 ± 0.2) E/μV, which is consistent with the theoretical simulation. Error analyses reveal that the performance of the proposed calibration scheme is mainly limited by positioning error of the excitation and can be improved by applying higher accuracy position rails. Furthermore, the RAGG is expected to perform more efficiently and reliably in field tests in the future. MDPI 2018-12-11 /pmc/articles/PMC6308669/ /pubmed/30544994 http://dx.doi.org/10.3390/s18124386 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Deng, Zhongguang
Hu, Chenyuan
Huang, Xiangqing
Wu, Wenjie
Hu, Fangjing
Liu, Huafeng
Tu, Liangcheng
Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer
title Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer
title_full Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer
title_fullStr Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer
title_full_unstemmed Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer
title_short Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer
title_sort scale factor calibration for a rotating accelerometer gravity gradiometer
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308669/
https://www.ncbi.nlm.nih.gov/pubmed/30544994
http://dx.doi.org/10.3390/s18124386
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