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...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2018-12-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/18/12/4386 |
| _version_ | 1798041737664397312 |
|---|---|
| author | Zhongguang Deng Chenyuan Hu Xiangqing Huang Wenjie Wu Fangjing Hu Huafeng Liu Liangcheng Tu |
| author_facet | Zhongguang Deng Chenyuan Hu Xiangqing Huang Wenjie Wu Fangjing Hu Huafeng Liu Liangcheng Tu |
| author_sort | Zhongguang Deng |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-11T22:25:47Z |
| format | Article |
| id | doaj.art-954e8dbb7e974ee9bd081401fb01d9af |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:25:47Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-954e8dbb7e974ee9bd081401fb01d9af2022-12-22T03:59:40ZengMDPI AGSensors1424-82202018-12-011812438610.3390/s18124386s18124386Scale Factor Calibration for a Rotating Accelerometer Gravity GradiometerZhongguang Deng0Chenyuan Hu1Xiangqing Huang2Wenjie Wu3Fangjing Hu4Huafeng Liu5Liangcheng Tu6MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, ChinaMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, ChinaTianQin Research Center for Gravitational Physics and School of Physics and Astronomy, Sun Yat-Sen University (Zhuhai Campus), Zhuhai 519082, ChinaMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, ChinaMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, ChinaMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, ChinaMOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, ChinaRotating 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.https://www.mdpi.com/1424-8220/18/12/4386gravity gradient measurementrotating accelerometer gravity gradiometeraccelerometerstatic-platform calibrationscale factor |
| spellingShingle | Zhongguang Deng Chenyuan Hu Xiangqing Huang Wenjie Wu Fangjing Hu Huafeng Liu Liangcheng Tu Scale Factor Calibration for a Rotating Accelerometer Gravity Gradiometer Sensors gravity gradient measurement rotating accelerometer gravity gradiometer accelerometer static-platform calibration scale factor |
| 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 | gravity gradient measurement rotating accelerometer gravity gradiometer accelerometer static-platform calibration scale factor |
| url | https://www.mdpi.com/1424-8220/18/12/4386 |
| work_keys_str_mv | AT zhongguangdeng scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT chenyuanhu scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT xiangqinghuang scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT wenjiewu scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT fangjinghu scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT huafengliu scalefactorcalibrationforarotatingaccelerometergravitygradiometer AT liangchengtu scalefactorcalibrationforarotatingaccelerometergravitygradiometer |