时间域航空电磁系统姿态变化影响研究
|
摘要
航空电磁系统的收发线圈受外界因素影响会发生姿态变化,使测量结果产生一定偏差.传统的数据处理方法考虑姿态变化情况单一,且主要以频率域系统为主,而目前复杂姿态变化对时间域航空电磁系统全时响应的影响尚未有系统研究.本文在前人研究基础上拓宽思路,不仅研究姿态的角度变化,同时改进前人计算方法,研究线圈发生位置变化的影响,并将线圈与大地的耦合感应效应考虑在内.本文通过定义姿态变化前后两种坐标系,确定姿态变化的角度和旋转矩阵,并将一维层状半解析解与姿态角度变化和位置变化进行整合,推导出收发线圈任意姿态变化的表达式.以直升机吊舱分离装置为例,对时间域航空电磁系统收发线圈任意姿态变化进行细致分析.基于重叠偶极子的假设,给出可应用于实际工作中的姿态校正因子,以提高实测数据的处理效率与精度.
The attitude of the receiver and transmitter coil of the airborne electromagnetic(AEM)system will be influenced by many external factors,which lead to a certain deviation of the measurement results.In previous studies,the processing methods of AEM data mainly consider the attitude change in frequency-domain.However,few of them focus on the complex situation of attitude change for time-domain AEM system.In this paper,we not only carry on a series of researches on angle change of attitude,but also improve the existing algorithm and take the coupling effect of coils and earth into account to study the influence of position change of coils by defining the two coordinate systems of attitude,we determine angle and rotation matrix ofattitude change.Integrating the 1 Dlayered semi-analytical solution with the change of angle and location,we derive the equation of attitude change of transform and receive coil.Additional,we taking the towed-bird separation system of helicopter as an example to analysis the arbitrary attitude change of the transceiver coil of time-domain AEM system.Moreover,based on the assumption of superposed dipole model,we provide the attitude correction factors which can be applied in practical work and improve the efficiency and precision of the measured data processing.
The attitude of the receiver and transmitter coil of the airborne electromagnetic(AEM)system will be influenced by many external factors,which lead to a certain deviation of the measurement results.In previous studies,the processing methods of AEM data mainly consider the attitude change in frequency-domain.However,few of them focus on the complex situation of attitude change for time-domain AEM system.In this paper,we not only carry on a series of researches on angle change of attitude,but also improve the existing algorithm and take the coupling effect of coils and earth into account to study the influence of position change of coils by defining the two coordinate systems of attitude,we determine angle and rotation matrix ofattitude change.Integrating the 1 Dlayered semi-analytical solution with the change of angle and location,we derive the equation of attitude change of transform and receive coil.Additional,we taking the towed-bird separation system of helicopter as an example to analysis the arbitrary attitude change of the transceiver coil of time-domain AEM system.Moreover,based on the assumption of superposed dipole model,we provide the attitude correction factors which can be applied in practical work and improve the efficiency and precision of the measured data processing.
引文
Brodie R C,Sambridge M.2006.A holistic approach to inversion of frequency-domain airborne EM data.Geophysics,71(6):G301-G312.
Davis A C,Macnae J,Robb T.2006.Pendulum motion in airborne HEM systems.Exploration Geophysics,37(4):355-362.
Deszcz-Pan M,Fitterman D V,Labson V F.1998.Reduction of inversion errors in helicopter EM data using auxiliary information.Exploration Geophysics,29(2):142-146.
Fitterman D V.1998.Sources of calibration errors in helicopter EMdata.Exploration Geophysics,29(2):65-70.
Fitterman D V,Yin C C.2004.Effect of bird maneuver on frequency-domain helicopter EM response.Geophysics,69(5):1203-1215.
Holladay J S,Lo B,Prinsenberg S K.1997.Bird orientation effects in quantitative airborne electromagnetic interpretation of pack ice thickness sounding.∥Proceedings of the MTS/IEEE Conference Proceedings Oceuns'97.Halifax,Canada:IEEE,1114-1116.
Ji Y J,Lin J,Guan S S,et al.2010.Theoretical study of concentric loop coils attitude correction in helicopter-borne TEM.Chinese Journal of Geophysics(in Chinese),53(1):171-176,doi:10.3969/j.issn.0001-5733.2010.01.019.
Kratzer T,Vrbancich J.2006.Real-time kinematic tracking of towed AEM birds.Exploration Geophysics,38(2):132-143.
Li G,Qu X D,Chen J,et al.2016.Bias real-time correction of airborne frequency domain electromagnetic system based on attitude change.Chinese Journal of Geophysics(in Chinese),59(10):3917-3926,doi:10.6038/cjg20161035.
Li W J,Meng Q M,Li J F.2007.Development of frequencydomain airborne electromagnetic system in China.Computing Techniques for Geophysical and Geochemical Exploration(in Chinese),29(S1):21-24.
Podgorski J E,Auken E,Schamper C,et al.2013.Processing and inversion of commercial helicopter time-domain electromagnetic data for environmental assessments and geologic and hydrologic mapping.Geophysics,78(4):E149-E159.
Qu X X,Li T L,Wang F.2014.A study on effect of bird′s attitude on helicopter EM data and the Correction method.Chinese Journal of Geophysics(in Chinese),57(4):1310-1321,doi:10.6038/cjg20140428.
Reid J E,Worby A P,Vrbancich J,et al.2003.Shipborne electromagnetic measurements of Antarctic sea-ice thickness.Geophysics,68(5):1537-1546.
Son K H.1985.Interpretation of electromagnetic dipole-dipole frequency sounding data over a vertically stratified earth[Ph.D.thesis].Raleigh:North Carolina State University.
Sun D H,Li H Y,Jiang M Z,et al.2017.Applications of time domain airborne electromagnetic and aeromagnetic in Wulonggou gold deposit exploration area.Progress in Geophysics(in Chinese),32(6):2533-2544,doi:10.6038/pg20170634.
Ullmann A,Siemon B,Miensopust M.2013.Automatic detection and classification of induction anomalies in helicopter-borne electromagnetic data sets.∥5th International Symposium on Three-Dimensional Electromagnetics.
Wang Q,Lin J,Yu S B,et al.2013.Study on influence and correction of coil attitude and bird swing for the fixed-wing timedomain electromagnetic system.Chinese Journal of Geophysics(in Chinese),56(11):3741-3750,doi:10.6038/cjg20131115.
Yin C C,Fraser D C.2004.The effect of the electrical anisotropy on the response of helicopter-borne frequency-domain electromagnetic systems.Geophysical Prospecting,52(5):339-416.
Yin C C,Hodges G.2007.Simulated annealing for airborne EMinversion.Geophysics,72(4):F189-F195.
Yin C C,Huang W,Ben F.2013.The full-time electromagnetic modeling for time-domain airborne electromagnetic systems.Chinese Journal of Geophysics(in Chinese),56(9):3153-3162,doi:10.6038/cjg20130928.
Zhao Y,Xu F,Li X.2017.Review on time-domain AEM system and applied potential.Progress in Geophysics(in Chinese),32(6):2709-2716,doi:10.6038/pg20170656.
Zhu K G,Lin J,Liu C C,et al.2008.One-dimensional forwand and prospecting depth for airborne frequency domain electromagnetic method.Progress in Geophysics(in Chinese),23(6):1943-1946.
嵇艳鞠,林君,关珊珊等.2010.直升机航空TEM中心回线线圈姿态校正的理论研究.地球物理学报,53(1):171-176,doi:10.3969/j.issn.0001-5733.2010.01.019.
李光,渠晓东,陈洁等.2016.基于姿态变化的航空电磁频率域电磁法仪器偏置实时校正方法研究.地球物理学报,59(10):3917-3929,doi:10.6038/cjg20161035.
李文杰,孟庆敏,李军峰.2007.我国频率域航空电磁法仪器系统研制回顾与展望.物探化探计算技术,29(S1):21-24.
曲昕馨,李桐林,王飞.2014.直升机吊舱姿态变化对电磁场测量的影响规律及其校正方法研究.地球物理学报,57(4):1310-1321,doi:10.6038/cjg20140428.
孙栋华,李怀渊,江民忠等.2017.时间域航空电磁、航磁在五龙沟金矿整装勘查区中的应用研究.地球物理学进展,32(6):2533-2544,doi:10.6038/pg20170634.
王琦,林君,于生宝等.2013.固定翼航空电磁系统的线圈姿态及吊舱摆动影响研究与校正.地球物理学报,56(11):3741-3750,doi:10.6038/cjg20131115.
殷长春,黄威,贲放.2013.时间域航空电磁系统瞬变全时响应正演模拟.地球物理学报,56(9):3153-3162,doi:10.6038/cjg20130928.
赵越,许枫,李貅.2017.时间域航空电磁系统回顾及其应用前景,地球物理学进展,32(6):2709-2716,doi:10.6038/pg20170656.
朱凯光,林君,刘长胜等.2008.频率域航空电磁法一维正演与探测深度.地球物理学进展,23(6):1943-1946.
Davis A C,Macnae J,Robb T.2006.Pendulum motion in airborne HEM systems.Exploration Geophysics,37(4):355-362.
Deszcz-Pan M,Fitterman D V,Labson V F.1998.Reduction of inversion errors in helicopter EM data using auxiliary information.Exploration Geophysics,29(2):142-146.
Fitterman D V.1998.Sources of calibration errors in helicopter EMdata.Exploration Geophysics,29(2):65-70.
Fitterman D V,Yin C C.2004.Effect of bird maneuver on frequency-domain helicopter EM response.Geophysics,69(5):1203-1215.
Holladay J S,Lo B,Prinsenberg S K.1997.Bird orientation effects in quantitative airborne electromagnetic interpretation of pack ice thickness sounding.∥Proceedings of the MTS/IEEE Conference Proceedings Oceuns'97.Halifax,Canada:IEEE,1114-1116.
Ji Y J,Lin J,Guan S S,et al.2010.Theoretical study of concentric loop coils attitude correction in helicopter-borne TEM.Chinese Journal of Geophysics(in Chinese),53(1):171-176,doi:10.3969/j.issn.0001-5733.2010.01.019.
Kratzer T,Vrbancich J.2006.Real-time kinematic tracking of towed AEM birds.Exploration Geophysics,38(2):132-143.
Li G,Qu X D,Chen J,et al.2016.Bias real-time correction of airborne frequency domain electromagnetic system based on attitude change.Chinese Journal of Geophysics(in Chinese),59(10):3917-3926,doi:10.6038/cjg20161035.
Li W J,Meng Q M,Li J F.2007.Development of frequencydomain airborne electromagnetic system in China.Computing Techniques for Geophysical and Geochemical Exploration(in Chinese),29(S1):21-24.
Podgorski J E,Auken E,Schamper C,et al.2013.Processing and inversion of commercial helicopter time-domain electromagnetic data for environmental assessments and geologic and hydrologic mapping.Geophysics,78(4):E149-E159.
Qu X X,Li T L,Wang F.2014.A study on effect of bird′s attitude on helicopter EM data and the Correction method.Chinese Journal of Geophysics(in Chinese),57(4):1310-1321,doi:10.6038/cjg20140428.
Reid J E,Worby A P,Vrbancich J,et al.2003.Shipborne electromagnetic measurements of Antarctic sea-ice thickness.Geophysics,68(5):1537-1546.
Son K H.1985.Interpretation of electromagnetic dipole-dipole frequency sounding data over a vertically stratified earth[Ph.D.thesis].Raleigh:North Carolina State University.
Sun D H,Li H Y,Jiang M Z,et al.2017.Applications of time domain airborne electromagnetic and aeromagnetic in Wulonggou gold deposit exploration area.Progress in Geophysics(in Chinese),32(6):2533-2544,doi:10.6038/pg20170634.
Ullmann A,Siemon B,Miensopust M.2013.Automatic detection and classification of induction anomalies in helicopter-borne electromagnetic data sets.∥5th International Symposium on Three-Dimensional Electromagnetics.
Wang Q,Lin J,Yu S B,et al.2013.Study on influence and correction of coil attitude and bird swing for the fixed-wing timedomain electromagnetic system.Chinese Journal of Geophysics(in Chinese),56(11):3741-3750,doi:10.6038/cjg20131115.
Yin C C,Fraser D C.2004.The effect of the electrical anisotropy on the response of helicopter-borne frequency-domain electromagnetic systems.Geophysical Prospecting,52(5):339-416.
Yin C C,Hodges G.2007.Simulated annealing for airborne EMinversion.Geophysics,72(4):F189-F195.
Yin C C,Huang W,Ben F.2013.The full-time electromagnetic modeling for time-domain airborne electromagnetic systems.Chinese Journal of Geophysics(in Chinese),56(9):3153-3162,doi:10.6038/cjg20130928.
Zhao Y,Xu F,Li X.2017.Review on time-domain AEM system and applied potential.Progress in Geophysics(in Chinese),32(6):2709-2716,doi:10.6038/pg20170656.
Zhu K G,Lin J,Liu C C,et al.2008.One-dimensional forwand and prospecting depth for airborne frequency domain electromagnetic method.Progress in Geophysics(in Chinese),23(6):1943-1946.
嵇艳鞠,林君,关珊珊等.2010.直升机航空TEM中心回线线圈姿态校正的理论研究.地球物理学报,53(1):171-176,doi:10.3969/j.issn.0001-5733.2010.01.019.
李光,渠晓东,陈洁等.2016.基于姿态变化的航空电磁频率域电磁法仪器偏置实时校正方法研究.地球物理学报,59(10):3917-3929,doi:10.6038/cjg20161035.
李文杰,孟庆敏,李军峰.2007.我国频率域航空电磁法仪器系统研制回顾与展望.物探化探计算技术,29(S1):21-24.
曲昕馨,李桐林,王飞.2014.直升机吊舱姿态变化对电磁场测量的影响规律及其校正方法研究.地球物理学报,57(4):1310-1321,doi:10.6038/cjg20140428.
孙栋华,李怀渊,江民忠等.2017.时间域航空电磁、航磁在五龙沟金矿整装勘查区中的应用研究.地球物理学进展,32(6):2533-2544,doi:10.6038/pg20170634.
王琦,林君,于生宝等.2013.固定翼航空电磁系统的线圈姿态及吊舱摆动影响研究与校正.地球物理学报,56(11):3741-3750,doi:10.6038/cjg20131115.
殷长春,黄威,贲放.2013.时间域航空电磁系统瞬变全时响应正演模拟.地球物理学报,56(9):3153-3162,doi:10.6038/cjg20130928.
赵越,许枫,李貅.2017.时间域航空电磁系统回顾及其应用前景,地球物理学进展,32(6):2709-2716,doi:10.6038/pg20170656.
朱凯光,林君,刘长胜等.2008.频率域航空电磁法一维正演与探测深度.地球物理学进展,23(6):1943-1946.