| 同心补偿式直升机时间域航空电磁法吊舱校准装置研究 |
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| 引用本文： | 王世隆,王言章,随阳轶,王琦,林君.同心补偿式直升机时间域航空电磁法吊舱校准装置研究[J].地球物理学报,2011,54(9):2397-2406. |
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| 作者姓名： | 王世隆 王言章 随阳轶 王琦 林君 |
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| 作者单位： | 吉林大学地球信息探测仪器教育部重点实验室/仪器科学与电气工程学院, 长春 130026 |
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| 基金项目： | 国家高技术研究发展计划(863计划)(2006AA06A205)和吉林大学科学前沿与交叉学科创新项目(421030090537)资助. |
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| 摘 要： | 直升机间域航空电磁法(Helicopter-borne time-domain electromagnetic method,HTEM)的多次空中仪器校准可消除飞行过程中仪器系统受外界环境的时变影响.吊舱校准装置可解决地面环线方式无法实现的空中飞行过程中仪器校准问题.本文从研究同心补偿吊舱装置模型出发,提出了吊舱装置空...
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| 关 键 词： | 航空电磁法 直升机时间域电磁法 吊舱装置 校准装置 补偿环 |
| 收稿时间： | 2010-11-24 |
A bird calibration device of Helicopter-borne TEM with concentric bucking loop |
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| WANG Shi-Long,WANG Yan-Zhang,SUI Yang-Yi,WANG Qi,LIN Jun.A bird calibration device of Helicopter-borne TEM with concentric bucking loop[J].Chinese Journal of Geophysics,2011,54(9):2397-2406. |
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| Authors: | WANG Shi-Long WANG Yan-Zhang SUI Yang-Yi WANG Qi LIN Jun |
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| Institution: | Key Laboratory of Geo-Exploration Instrumentation, Ministry of Education, Jilin University,Changchun 130026,China |
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| Abstract: | The multiple instrument calibrations of flying helicopter-borne time-domain electromagnetic method (HTEM) can eliminate the environmental time-varying effect on the system during flight. Using the bird calibration device to solve the problem that the wire-loop method can't achieve, we consider the bird model of HTEM with the concentric bucking loop, propose the bird device space models and the coil circuit models, and analyze the transmitter magnetic field distribution, the bucking loop's effect and the relationship between it and the receiving coil, the space information of the calibration device and its signal detecting method. Conclusions are as follows: (1) the bucking loop that losses 0.89% of the transmitting area can increase 44.5 dB of the signal dynamic range. (2) The calibration device is levelly placed between the bucking loop and the transmitting coils. If it has more turns and greater radius and it is closer to the bucking loop, its signal response is stronger. (3) When the inductance of calibration coil becomes greater and its resistance is less, its exponential decay becomes slower. The signal detection time point is directly decided by damping character of receiver coil which has matching resistance. We do experiments about the calibration curve characters and the device coil displacement. The relative error about the time constant of the device characteristics is less than 1.3%, which proves the validity of the coil circuit models and device space models. The proposed models and approaches are also applicable to the bird calibration device research about HTEM with the eccentric bucking loop and the known wire-loop static testing on the high resistance ground. |
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| Keywords: | Airborne electromagnetic method Helicopter-borne TEM Bird device Calibration device Bucking loop |
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