A real-time gravity gradient demodulation method for airborne gravity gradiometers
-
摘要: 为了进一步提高重力梯度测量精度,提出了一种实时解调相位角补偿和重力梯度实时处理方法。首先根据重力梯度仪样机结构特性给出了重力梯度解调相位角的求解过程和求解算式,然后研究了实时重力梯度解调方法并给出了重力梯度解调算式,最后在重力梯度信号半物理仿真平台上进行了仿真实验测试。测试结果表明,所提方法可以明显提高重力梯度测量精度,具有较高的工程应用价值,可以为航空重力梯度仪的研制提供技术参考。Abstract: To further improve the precision of gravity gradient measurement, this study proposed a method for real-time phase angle compensation of gravity gradient demodulation and real-time processing of gravity gradients. Firstly, this study determined the process and formula used to determine the phase angles for gravity gradient demodulation based on the structural features of the gravity gradiometer prototype. Then, it investigated the method for real-time gravity gradient demodulation and determined the formula. Finally, this study carried out simulation experiments using the hardware-in-the-loop simulation platform of gravity gradient signals. The simulation results show that the method proposed in this study can significantly improve the precision of gravity gradient measurement and can be applied to engineering. Therefore, this study can provide technical references for the development of airborne gravity gradiometers.
-
-
[1] 钱学武, 蔡体菁, 尹航. 一种旋转加速度计重力梯度仪重力梯度解调方法[J]. 物探与化探, 2015, 39(S1):80-83.
[2] Qian X W, Cai T J, Yin H. A gravity gradient demodulation method for rotating accelerometer gravity gradiometer[J]. Geophysical and Geochemical Exploration, 2015, 39(S1):80-83.
[3] 蔡体菁, 钱学武, 丁昊. 旋转加速度计重力梯度仪重力梯度信号仿真[J]. 物探与化探, 2015, 39(S1):80-83.
[4] Cai T J, Qian X W, Ding H. Signal simulation of gravity gradient for gravity gradiometer of rotating accelerometer[J]. Geophysical and Geochemical Exploration, 2015, 39(S1): 80-83.
[5] Difrancesco D. Advances and challenges in the development and deployment of gravity gradiometer systems[C]// EGM 2007 International Workshop, Innovation in EM, Grav. and Mag.Methods:A new Perspective for Exploration, Italy: Capri, 2007.
[6] Roberts D, Chowdhury P R, Lowe S J, et al. Airborne gravity gradiometer surveying of petroleum systems under Lake Tanganyika, Tanzania[J]. Exploration Geophysics, 2016, 47(3):228-236.
[7] DiFrancesco D, Meyer T, Christensen A, et al. Gravity gradiometry-today and tomorrow[C]// 11th SAGA Biennial Technical Meeting and Exhibition, 2009.
[8] Lococo J J. The Falcon airborne gravity gradiometer for engineering applications[C]// Environment and Engineering Geophysical Society, 2010.
[9] Yamanaka H. HeliFalcon? airborne gravity gradiometer data acquisition in rugged terrain[C]// Global Meeting Abstracts Society of Exploration Geophysicists, 2013.
[10] 钱学武, 蔡体菁. 旋转加速度计重力梯度仪数据处理方法[J]. 东南大学学报:自然科学版, 2016, 46(4):708-712.
[11] Qian X W, Cai T J. Data processing methods for rotating accelerometer gravity gradiometer[J]. Journal of Southeast University Natural Science Edition, 2016, 46(4): 708-712.
[12] 钱学武, 赵立业. 旋转加速度计重力梯度仪重力梯度解调相位角确定方法及装置[P]. 中国专利, CN 111624671A. 2020.09.04
[13] Qian X W, Zhao L Y. Method and device for determining phase angle of gravity gradient demodulation for rotating accelerometer gravity gradiometer[P]. Patent, CN 111624671A. 2020.09.04.
[14] 钱学武, 赵立业. 一种航空重力梯度仪实时重力梯度解调方法及装置[P]. 中国专利, CN 111650664A. 2020.09.11.
[15] Qian X W, Zhao L Y. Method and device of real-time gravity gradient demodulation for an airborne gravity gradiometer[P]. Patent, CN 111650664A. 2020.09.11.
[16] 蔡体菁, 钱学武, 丁昊. 旋转加速度计重力梯度仪重力梯度信号仿真[J]. 物探与化探, 2015, 39(S1): 76-79.
[17] Cai T J, Qian X W, Ding H. Signal simulation of gravity gradient for gravity gradiometer of rotating accelerometer[J]. Geophysical and Geochemical Exploration, 2015, 39(S1): 76-79.
-
计量
- 文章访问数: 360
- PDF下载数: 86
- 施引文献: 0
下载: