Cargando…
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...
Autores principales: | , , , , , , |
---|---|
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 |
_version_ | 1783383243290050560 |
---|---|
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. |
format | Online Article Text |
id | pubmed-6308669 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT dengzhongguang scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT huchenyuan scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT huangxiangqing scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT wuwenjie scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT hufangjing scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT liuhuafeng scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT tuliangcheng scalefactorcalibrationforarotatingaccelerometergravitygradiometer |